Line data Source code
1 : /*-------------------------------------------------------------------------
2 : *
3 : * postgres.c
4 : * POSTGRES C Backend Interface
5 : *
6 : * Portions Copyright (c) 1996-2024, PostgreSQL Global Development Group
7 : * Portions Copyright (c) 1994, Regents of the University of California
8 : *
9 : *
10 : * IDENTIFICATION
11 : * src/backend/tcop/postgres.c
12 : *
13 : * NOTES
14 : * this is the "main" module of the postgres backend and
15 : * hence the main module of the "traffic cop".
16 : *
17 : *-------------------------------------------------------------------------
18 : */
19 :
20 : #include "postgres.h"
21 :
22 : #include <fcntl.h>
23 : #include <limits.h>
24 : #include <signal.h>
25 : #include <unistd.h>
26 : #include <sys/resource.h>
27 : #include <sys/socket.h>
28 : #include <sys/time.h>
29 :
30 : #ifdef USE_VALGRIND
31 : #include <valgrind/valgrind.h>
32 : #endif
33 :
34 : #include "access/parallel.h"
35 : #include "access/printtup.h"
36 : #include "access/xact.h"
37 : #include "catalog/pg_type.h"
38 : #include "commands/async.h"
39 : #include "commands/event_trigger.h"
40 : #include "commands/prepare.h"
41 : #include "common/pg_prng.h"
42 : #include "jit/jit.h"
43 : #include "libpq/libpq.h"
44 : #include "libpq/pqformat.h"
45 : #include "libpq/pqsignal.h"
46 : #include "mb/pg_wchar.h"
47 : #include "mb/stringinfo_mb.h"
48 : #include "miscadmin.h"
49 : #include "nodes/print.h"
50 : #include "optimizer/optimizer.h"
51 : #include "parser/analyze.h"
52 : #include "parser/parser.h"
53 : #include "pg_getopt.h"
54 : #include "pg_trace.h"
55 : #include "pgstat.h"
56 : #include "postmaster/autovacuum.h"
57 : #include "postmaster/interrupt.h"
58 : #include "postmaster/postmaster.h"
59 : #include "replication/logicallauncher.h"
60 : #include "replication/logicalworker.h"
61 : #include "replication/slot.h"
62 : #include "replication/walsender.h"
63 : #include "rewrite/rewriteHandler.h"
64 : #include "storage/bufmgr.h"
65 : #include "storage/ipc.h"
66 : #include "storage/pmsignal.h"
67 : #include "storage/proc.h"
68 : #include "storage/procsignal.h"
69 : #include "storage/sinval.h"
70 : #include "tcop/fastpath.h"
71 : #include "tcop/pquery.h"
72 : #include "tcop/tcopprot.h"
73 : #include "tcop/utility.h"
74 : #include "utils/guc_hooks.h"
75 : #include "utils/injection_point.h"
76 : #include "utils/lsyscache.h"
77 : #include "utils/memutils.h"
78 : #include "utils/ps_status.h"
79 : #include "utils/snapmgr.h"
80 : #include "utils/timeout.h"
81 : #include "utils/timestamp.h"
82 :
83 : /* ----------------
84 : * global variables
85 : * ----------------
86 : */
87 : const char *debug_query_string; /* client-supplied query string */
88 :
89 : /* Note: whereToSendOutput is initialized for the bootstrap/standalone case */
90 : CommandDest whereToSendOutput = DestDebug;
91 :
92 : /* flag for logging end of session */
93 : bool Log_disconnections = false;
94 :
95 : int log_statement = LOGSTMT_NONE;
96 :
97 : /* GUC variable for maximum stack depth (measured in kilobytes) */
98 : int max_stack_depth = 100;
99 :
100 : /* wait N seconds to allow attach from a debugger */
101 : int PostAuthDelay = 0;
102 :
103 : /* Time between checks that the client is still connected. */
104 : int client_connection_check_interval = 0;
105 :
106 : /* ----------------
107 : * private typedefs etc
108 : * ----------------
109 : */
110 :
111 : /* type of argument for bind_param_error_callback */
112 : typedef struct BindParamCbData
113 : {
114 : const char *portalName;
115 : int paramno; /* zero-based param number, or -1 initially */
116 : const char *paramval; /* textual input string, if available */
117 : } BindParamCbData;
118 :
119 : /* ----------------
120 : * private variables
121 : * ----------------
122 : */
123 :
124 : /* max_stack_depth converted to bytes for speed of checking */
125 : static long max_stack_depth_bytes = 100 * 1024L;
126 :
127 : /*
128 : * Stack base pointer -- initialized by PostmasterMain and inherited by
129 : * subprocesses (but see also InitPostmasterChild).
130 : */
131 : static char *stack_base_ptr = NULL;
132 :
133 : /*
134 : * Flag to keep track of whether we have started a transaction.
135 : * For extended query protocol this has to be remembered across messages.
136 : */
137 : static bool xact_started = false;
138 :
139 : /*
140 : * Flag to indicate that we are doing the outer loop's read-from-client,
141 : * as opposed to any random read from client that might happen within
142 : * commands like COPY FROM STDIN.
143 : */
144 : static bool DoingCommandRead = false;
145 :
146 : /*
147 : * Flags to implement skip-till-Sync-after-error behavior for messages of
148 : * the extended query protocol.
149 : */
150 : static bool doing_extended_query_message = false;
151 : static bool ignore_till_sync = false;
152 :
153 : /*
154 : * If an unnamed prepared statement exists, it's stored here.
155 : * We keep it separate from the hashtable kept by commands/prepare.c
156 : * in order to reduce overhead for short-lived queries.
157 : */
158 : static CachedPlanSource *unnamed_stmt_psrc = NULL;
159 :
160 : /* assorted command-line switches */
161 : static const char *userDoption = NULL; /* -D switch */
162 : static bool EchoQuery = false; /* -E switch */
163 : static bool UseSemiNewlineNewline = false; /* -j switch */
164 :
165 : /* whether or not, and why, we were canceled by conflict with recovery */
166 : static volatile sig_atomic_t RecoveryConflictPending = false;
167 : static volatile sig_atomic_t RecoveryConflictPendingReasons[NUM_PROCSIGNALS];
168 :
169 : /* reused buffer to pass to SendRowDescriptionMessage() */
170 : static MemoryContext row_description_context = NULL;
171 : static StringInfoData row_description_buf;
172 :
173 : /* ----------------------------------------------------------------
174 : * decls for routines only used in this file
175 : * ----------------------------------------------------------------
176 : */
177 : static int InteractiveBackend(StringInfo inBuf);
178 : static int interactive_getc(void);
179 : static int SocketBackend(StringInfo inBuf);
180 : static int ReadCommand(StringInfo inBuf);
181 : static void forbidden_in_wal_sender(char firstchar);
182 : static bool check_log_statement(List *stmt_list);
183 : static int errdetail_execute(List *raw_parsetree_list);
184 : static int errdetail_params(ParamListInfo params);
185 : static int errdetail_abort(void);
186 : static void bind_param_error_callback(void *arg);
187 : static void start_xact_command(void);
188 : static void finish_xact_command(void);
189 : static bool IsTransactionExitStmt(Node *parsetree);
190 : static bool IsTransactionExitStmtList(List *pstmts);
191 : static bool IsTransactionStmtList(List *pstmts);
192 : static void drop_unnamed_stmt(void);
193 : static void log_disconnections(int code, Datum arg);
194 : static void enable_statement_timeout(void);
195 : static void disable_statement_timeout(void);
196 :
197 :
198 : /* ----------------------------------------------------------------
199 : * infrastructure for valgrind debugging
200 : * ----------------------------------------------------------------
201 : */
202 : #ifdef USE_VALGRIND
203 : /* This variable should be set at the top of the main loop. */
204 : static unsigned int old_valgrind_error_count;
205 :
206 : /*
207 : * If Valgrind detected any errors since old_valgrind_error_count was updated,
208 : * report the current query as the cause. This should be called at the end
209 : * of message processing.
210 : */
211 : static void
212 : valgrind_report_error_query(const char *query)
213 : {
214 : unsigned int valgrind_error_count = VALGRIND_COUNT_ERRORS;
215 :
216 : if (unlikely(valgrind_error_count != old_valgrind_error_count) &&
217 : query != NULL)
218 : VALGRIND_PRINTF("Valgrind detected %u error(s) during execution of \"%s\"\n",
219 : valgrind_error_count - old_valgrind_error_count,
220 : query);
221 : }
222 :
223 : #else /* !USE_VALGRIND */
224 : #define valgrind_report_error_query(query) ((void) 0)
225 : #endif /* USE_VALGRIND */
226 :
227 :
228 : /* ----------------------------------------------------------------
229 : * routines to obtain user input
230 : * ----------------------------------------------------------------
231 : */
232 :
233 : /* ----------------
234 : * InteractiveBackend() is called for user interactive connections
235 : *
236 : * the string entered by the user is placed in its parameter inBuf,
237 : * and we act like a Q message was received.
238 : *
239 : * EOF is returned if end-of-file input is seen; time to shut down.
240 : * ----------------
241 : */
242 :
243 : static int
244 53826 : InteractiveBackend(StringInfo inBuf)
245 : {
246 : int c; /* character read from getc() */
247 :
248 : /*
249 : * display a prompt and obtain input from the user
250 : */
251 53826 : printf("backend> ");
252 53826 : fflush(stdout);
253 :
254 53826 : resetStringInfo(inBuf);
255 :
256 : /*
257 : * Read characters until EOF or the appropriate delimiter is seen.
258 : */
259 18843686 : while ((c = interactive_getc()) != EOF)
260 : {
261 18843592 : if (c == '\n')
262 : {
263 507756 : if (UseSemiNewlineNewline)
264 : {
265 : /*
266 : * In -j mode, semicolon followed by two newlines ends the
267 : * command; otherwise treat newline as regular character.
268 : */
269 507756 : if (inBuf->len > 1 &&
270 501600 : inBuf->data[inBuf->len - 1] == '\n' &&
271 80332 : inBuf->data[inBuf->len - 2] == ';')
272 : {
273 : /* might as well drop the second newline */
274 53732 : break;
275 : }
276 : }
277 : else
278 : {
279 : /*
280 : * In plain mode, newline ends the command unless preceded by
281 : * backslash.
282 : */
283 0 : if (inBuf->len > 0 &&
284 0 : inBuf->data[inBuf->len - 1] == '\\')
285 : {
286 : /* discard backslash from inBuf */
287 0 : inBuf->data[--inBuf->len] = '\0';
288 : /* discard newline too */
289 0 : continue;
290 : }
291 : else
292 : {
293 : /* keep the newline character, but end the command */
294 0 : appendStringInfoChar(inBuf, '\n');
295 0 : break;
296 : }
297 : }
298 : }
299 :
300 : /* Not newline, or newline treated as regular character */
301 18789860 : appendStringInfoChar(inBuf, (char) c);
302 : }
303 :
304 : /* No input before EOF signal means time to quit. */
305 53826 : if (c == EOF && inBuf->len == 0)
306 94 : return EOF;
307 :
308 : /*
309 : * otherwise we have a user query so process it.
310 : */
311 :
312 : /* Add '\0' to make it look the same as message case. */
313 53732 : appendStringInfoChar(inBuf, (char) '\0');
314 :
315 : /*
316 : * if the query echo flag was given, print the query..
317 : */
318 53732 : if (EchoQuery)
319 0 : printf("statement: %s\n", inBuf->data);
320 53732 : fflush(stdout);
321 :
322 53732 : return 'Q';
323 : }
324 :
325 : /*
326 : * interactive_getc -- collect one character from stdin
327 : *
328 : * Even though we are not reading from a "client" process, we still want to
329 : * respond to signals, particularly SIGTERM/SIGQUIT.
330 : */
331 : static int
332 18843686 : interactive_getc(void)
333 : {
334 : int c;
335 :
336 : /*
337 : * This will not process catchup interrupts or notifications while
338 : * reading. But those can't really be relevant for a standalone backend
339 : * anyway. To properly handle SIGTERM there's a hack in die() that
340 : * directly processes interrupts at this stage...
341 : */
342 18843686 : CHECK_FOR_INTERRUPTS();
343 :
344 18843686 : c = getc(stdin);
345 :
346 18843686 : ProcessClientReadInterrupt(false);
347 :
348 18843686 : return c;
349 : }
350 :
351 : /* ----------------
352 : * SocketBackend() Is called for frontend-backend connections
353 : *
354 : * Returns the message type code, and loads message body data into inBuf.
355 : *
356 : * EOF is returned if the connection is lost.
357 : * ----------------
358 : */
359 : static int
360 639580 : SocketBackend(StringInfo inBuf)
361 : {
362 : int qtype;
363 : int maxmsglen;
364 :
365 : /*
366 : * Get message type code from the frontend.
367 : */
368 639580 : HOLD_CANCEL_INTERRUPTS();
369 639580 : pq_startmsgread();
370 639580 : qtype = pq_getbyte();
371 :
372 639514 : if (qtype == EOF) /* frontend disconnected */
373 : {
374 78 : if (IsTransactionState())
375 8 : ereport(COMMERROR,
376 : (errcode(ERRCODE_CONNECTION_FAILURE),
377 : errmsg("unexpected EOF on client connection with an open transaction")));
378 : else
379 : {
380 : /*
381 : * Can't send DEBUG log messages to client at this point. Since
382 : * we're disconnecting right away, we don't need to restore
383 : * whereToSendOutput.
384 : */
385 70 : whereToSendOutput = DestNone;
386 70 : ereport(DEBUG1,
387 : (errcode(ERRCODE_CONNECTION_DOES_NOT_EXIST),
388 : errmsg_internal("unexpected EOF on client connection")));
389 : }
390 78 : return qtype;
391 : }
392 :
393 : /*
394 : * Validate message type code before trying to read body; if we have lost
395 : * sync, better to say "command unknown" than to run out of memory because
396 : * we used garbage as a length word. We can also select a type-dependent
397 : * limit on what a sane length word could be. (The limit could be chosen
398 : * more granularly, but it's not clear it's worth fussing over.)
399 : *
400 : * This also gives us a place to set the doing_extended_query_message flag
401 : * as soon as possible.
402 : */
403 639436 : switch (qtype)
404 : {
405 525304 : case PqMsg_Query:
406 525304 : maxmsglen = PQ_LARGE_MESSAGE_LIMIT;
407 525304 : doing_extended_query_message = false;
408 525304 : break;
409 :
410 2084 : case PqMsg_FunctionCall:
411 2084 : maxmsglen = PQ_LARGE_MESSAGE_LIMIT;
412 2084 : doing_extended_query_message = false;
413 2084 : break;
414 :
415 19894 : case PqMsg_Terminate:
416 19894 : maxmsglen = PQ_SMALL_MESSAGE_LIMIT;
417 19894 : doing_extended_query_message = false;
418 19894 : ignore_till_sync = false;
419 19894 : break;
420 :
421 30276 : case PqMsg_Bind:
422 : case PqMsg_Parse:
423 30276 : maxmsglen = PQ_LARGE_MESSAGE_LIMIT;
424 30276 : doing_extended_query_message = true;
425 30276 : break;
426 :
427 40568 : case PqMsg_Close:
428 : case PqMsg_Describe:
429 : case PqMsg_Execute:
430 : case PqMsg_Flush:
431 40568 : maxmsglen = PQ_SMALL_MESSAGE_LIMIT;
432 40568 : doing_extended_query_message = true;
433 40568 : break;
434 :
435 21102 : case PqMsg_Sync:
436 21102 : maxmsglen = PQ_SMALL_MESSAGE_LIMIT;
437 : /* stop any active skip-till-Sync */
438 21102 : ignore_till_sync = false;
439 : /* mark not-extended, so that a new error doesn't begin skip */
440 21102 : doing_extended_query_message = false;
441 21102 : break;
442 :
443 30 : case PqMsg_CopyData:
444 30 : maxmsglen = PQ_LARGE_MESSAGE_LIMIT;
445 30 : doing_extended_query_message = false;
446 30 : break;
447 :
448 178 : case PqMsg_CopyDone:
449 : case PqMsg_CopyFail:
450 178 : maxmsglen = PQ_SMALL_MESSAGE_LIMIT;
451 178 : doing_extended_query_message = false;
452 178 : break;
453 :
454 0 : default:
455 :
456 : /*
457 : * Otherwise we got garbage from the frontend. We treat this as
458 : * fatal because we have probably lost message boundary sync, and
459 : * there's no good way to recover.
460 : */
461 0 : ereport(FATAL,
462 : (errcode(ERRCODE_PROTOCOL_VIOLATION),
463 : errmsg("invalid frontend message type %d", qtype)));
464 : maxmsglen = 0; /* keep compiler quiet */
465 : break;
466 : }
467 :
468 : /*
469 : * In protocol version 3, all frontend messages have a length word next
470 : * after the type code; we can read the message contents independently of
471 : * the type.
472 : */
473 639436 : if (pq_getmessage(inBuf, maxmsglen))
474 0 : return EOF; /* suitable message already logged */
475 639436 : RESUME_CANCEL_INTERRUPTS();
476 :
477 639436 : return qtype;
478 : }
479 :
480 : /* ----------------
481 : * ReadCommand reads a command from either the frontend or
482 : * standard input, places it in inBuf, and returns the
483 : * message type code (first byte of the message).
484 : * EOF is returned if end of file.
485 : * ----------------
486 : */
487 : static int
488 693406 : ReadCommand(StringInfo inBuf)
489 : {
490 : int result;
491 :
492 693406 : if (whereToSendOutput == DestRemote)
493 639580 : result = SocketBackend(inBuf);
494 : else
495 53826 : result = InteractiveBackend(inBuf);
496 693340 : return result;
497 : }
498 :
499 : /*
500 : * ProcessClientReadInterrupt() - Process interrupts specific to client reads
501 : *
502 : * This is called just before and after low-level reads.
503 : * 'blocked' is true if no data was available to read and we plan to retry,
504 : * false if about to read or done reading.
505 : *
506 : * Must preserve errno!
507 : */
508 : void
509 24122388 : ProcessClientReadInterrupt(bool blocked)
510 : {
511 24122388 : int save_errno = errno;
512 :
513 24122388 : if (DoingCommandRead)
514 : {
515 : /* Check for general interrupts that arrived before/while reading */
516 19999886 : CHECK_FOR_INTERRUPTS();
517 :
518 : /* Process sinval catchup interrupts, if any */
519 19999820 : if (catchupInterruptPending)
520 708 : ProcessCatchupInterrupt();
521 :
522 : /* Process notify interrupts, if any */
523 19999820 : if (notifyInterruptPending)
524 134 : ProcessNotifyInterrupt(true);
525 : }
526 4122502 : else if (ProcDiePending)
527 : {
528 : /*
529 : * We're dying. If there is no data available to read, then it's safe
530 : * (and sane) to handle that now. If we haven't tried to read yet,
531 : * make sure the process latch is set, so that if there is no data
532 : * then we'll come back here and die. If we're done reading, also
533 : * make sure the process latch is set, as we might've undesirably
534 : * cleared it while reading.
535 : */
536 0 : if (blocked)
537 0 : CHECK_FOR_INTERRUPTS();
538 : else
539 0 : SetLatch(MyLatch);
540 : }
541 :
542 24122322 : errno = save_errno;
543 24122322 : }
544 :
545 : /*
546 : * ProcessClientWriteInterrupt() - Process interrupts specific to client writes
547 : *
548 : * This is called just before and after low-level writes.
549 : * 'blocked' is true if no data could be written and we plan to retry,
550 : * false if about to write or done writing.
551 : *
552 : * Must preserve errno!
553 : */
554 : void
555 3906082 : ProcessClientWriteInterrupt(bool blocked)
556 : {
557 3906082 : int save_errno = errno;
558 :
559 3906082 : if (ProcDiePending)
560 : {
561 : /*
562 : * We're dying. If it's not possible to write, then we should handle
563 : * that immediately, else a stuck client could indefinitely delay our
564 : * response to the signal. If we haven't tried to write yet, make
565 : * sure the process latch is set, so that if the write would block
566 : * then we'll come back here and die. If we're done writing, also
567 : * make sure the process latch is set, as we might've undesirably
568 : * cleared it while writing.
569 : */
570 18 : if (blocked)
571 : {
572 : /*
573 : * Don't mess with whereToSendOutput if ProcessInterrupts wouldn't
574 : * service ProcDiePending.
575 : */
576 0 : if (InterruptHoldoffCount == 0 && CritSectionCount == 0)
577 : {
578 : /*
579 : * We don't want to send the client the error message, as a)
580 : * that would possibly block again, and b) it would likely
581 : * lead to loss of protocol sync because we may have already
582 : * sent a partial protocol message.
583 : */
584 0 : if (whereToSendOutput == DestRemote)
585 0 : whereToSendOutput = DestNone;
586 :
587 0 : CHECK_FOR_INTERRUPTS();
588 : }
589 : }
590 : else
591 18 : SetLatch(MyLatch);
592 : }
593 :
594 3906082 : errno = save_errno;
595 3906082 : }
596 :
597 : /*
598 : * Do raw parsing (only).
599 : *
600 : * A list of parsetrees (RawStmt nodes) is returned, since there might be
601 : * multiple commands in the given string.
602 : *
603 : * NOTE: for interactive queries, it is important to keep this routine
604 : * separate from the analysis & rewrite stages. Analysis and rewriting
605 : * cannot be done in an aborted transaction, since they require access to
606 : * database tables. So, we rely on the raw parser to determine whether
607 : * we've seen a COMMIT or ABORT command; when we are in abort state, other
608 : * commands are not processed any further than the raw parse stage.
609 : */
610 : List *
611 638630 : pg_parse_query(const char *query_string)
612 : {
613 : List *raw_parsetree_list;
614 :
615 : TRACE_POSTGRESQL_QUERY_PARSE_START(query_string);
616 :
617 638630 : if (log_parser_stats)
618 0 : ResetUsage();
619 :
620 638630 : raw_parsetree_list = raw_parser(query_string, RAW_PARSE_DEFAULT);
621 :
622 637546 : if (log_parser_stats)
623 0 : ShowUsage("PARSER STATISTICS");
624 :
625 : #ifdef COPY_PARSE_PLAN_TREES
626 : /* Optional debugging check: pass raw parsetrees through copyObject() */
627 : {
628 637546 : List *new_list = copyObject(raw_parsetree_list);
629 :
630 : /* This checks both copyObject() and the equal() routines... */
631 637546 : if (!equal(new_list, raw_parsetree_list))
632 0 : elog(WARNING, "copyObject() failed to produce an equal raw parse tree");
633 : else
634 637546 : raw_parsetree_list = new_list;
635 : }
636 : #endif
637 :
638 : /*
639 : * Optional debugging check: pass raw parsetrees through
640 : * outfuncs/readfuncs
641 : */
642 : #ifdef WRITE_READ_PARSE_PLAN_TREES
643 : {
644 637546 : char *str = nodeToStringWithLocations(raw_parsetree_list);
645 637546 : List *new_list = stringToNodeWithLocations(str);
646 :
647 637546 : pfree(str);
648 : /* This checks both outfuncs/readfuncs and the equal() routines... */
649 637546 : if (!equal(new_list, raw_parsetree_list))
650 0 : elog(WARNING, "outfuncs/readfuncs failed to produce an equal raw parse tree");
651 : else
652 637546 : raw_parsetree_list = new_list;
653 : }
654 : #endif
655 :
656 : TRACE_POSTGRESQL_QUERY_PARSE_DONE(query_string);
657 :
658 637546 : return raw_parsetree_list;
659 : }
660 :
661 : /*
662 : * Given a raw parsetree (gram.y output), and optionally information about
663 : * types of parameter symbols ($n), perform parse analysis and rule rewriting.
664 : *
665 : * A list of Query nodes is returned, since either the analyzer or the
666 : * rewriter might expand one query to several.
667 : *
668 : * NOTE: for reasons mentioned above, this must be separate from raw parsing.
669 : */
670 : List *
671 648278 : pg_analyze_and_rewrite_fixedparams(RawStmt *parsetree,
672 : const char *query_string,
673 : const Oid *paramTypes,
674 : int numParams,
675 : QueryEnvironment *queryEnv)
676 : {
677 : Query *query;
678 : List *querytree_list;
679 :
680 : TRACE_POSTGRESQL_QUERY_REWRITE_START(query_string);
681 :
682 : /*
683 : * (1) Perform parse analysis.
684 : */
685 648278 : if (log_parser_stats)
686 0 : ResetUsage();
687 :
688 648278 : query = parse_analyze_fixedparams(parsetree, query_string, paramTypes, numParams,
689 : queryEnv);
690 :
691 640906 : if (log_parser_stats)
692 0 : ShowUsage("PARSE ANALYSIS STATISTICS");
693 :
694 : /*
695 : * (2) Rewrite the queries, as necessary
696 : */
697 640906 : querytree_list = pg_rewrite_query(query);
698 :
699 : TRACE_POSTGRESQL_QUERY_REWRITE_DONE(query_string);
700 :
701 640318 : return querytree_list;
702 : }
703 :
704 : /*
705 : * Do parse analysis and rewriting. This is the same as
706 : * pg_analyze_and_rewrite_fixedparams except that it's okay to deduce
707 : * information about $n symbol datatypes from context.
708 : */
709 : List *
710 11704 : pg_analyze_and_rewrite_varparams(RawStmt *parsetree,
711 : const char *query_string,
712 : Oid **paramTypes,
713 : int *numParams,
714 : QueryEnvironment *queryEnv)
715 : {
716 : Query *query;
717 : List *querytree_list;
718 :
719 : TRACE_POSTGRESQL_QUERY_REWRITE_START(query_string);
720 :
721 : /*
722 : * (1) Perform parse analysis.
723 : */
724 11704 : if (log_parser_stats)
725 0 : ResetUsage();
726 :
727 11704 : query = parse_analyze_varparams(parsetree, query_string, paramTypes, numParams,
728 : queryEnv);
729 :
730 : /*
731 : * Check all parameter types got determined.
732 : */
733 25334 : for (int i = 0; i < *numParams; i++)
734 : {
735 13646 : Oid ptype = (*paramTypes)[i];
736 :
737 13646 : if (ptype == InvalidOid || ptype == UNKNOWNOID)
738 0 : ereport(ERROR,
739 : (errcode(ERRCODE_INDETERMINATE_DATATYPE),
740 : errmsg("could not determine data type of parameter $%d",
741 : i + 1)));
742 : }
743 :
744 11688 : if (log_parser_stats)
745 0 : ShowUsage("PARSE ANALYSIS STATISTICS");
746 :
747 : /*
748 : * (2) Rewrite the queries, as necessary
749 : */
750 11688 : querytree_list = pg_rewrite_query(query);
751 :
752 : TRACE_POSTGRESQL_QUERY_REWRITE_DONE(query_string);
753 :
754 11688 : return querytree_list;
755 : }
756 :
757 : /*
758 : * Do parse analysis and rewriting. This is the same as
759 : * pg_analyze_and_rewrite_fixedparams except that, instead of a fixed list of
760 : * parameter datatypes, a parser callback is supplied that can do
761 : * external-parameter resolution and possibly other things.
762 : */
763 : List *
764 65780 : pg_analyze_and_rewrite_withcb(RawStmt *parsetree,
765 : const char *query_string,
766 : ParserSetupHook parserSetup,
767 : void *parserSetupArg,
768 : QueryEnvironment *queryEnv)
769 : {
770 : Query *query;
771 : List *querytree_list;
772 :
773 : TRACE_POSTGRESQL_QUERY_REWRITE_START(query_string);
774 :
775 : /*
776 : * (1) Perform parse analysis.
777 : */
778 65780 : if (log_parser_stats)
779 0 : ResetUsage();
780 :
781 65780 : query = parse_analyze_withcb(parsetree, query_string, parserSetup, parserSetupArg,
782 : queryEnv);
783 :
784 65672 : if (log_parser_stats)
785 0 : ShowUsage("PARSE ANALYSIS STATISTICS");
786 :
787 : /*
788 : * (2) Rewrite the queries, as necessary
789 : */
790 65672 : querytree_list = pg_rewrite_query(query);
791 :
792 : TRACE_POSTGRESQL_QUERY_REWRITE_DONE(query_string);
793 :
794 65672 : return querytree_list;
795 : }
796 :
797 : /*
798 : * Perform rewriting of a query produced by parse analysis.
799 : *
800 : * Note: query must just have come from the parser, because we do not do
801 : * AcquireRewriteLocks() on it.
802 : */
803 : List *
804 725002 : pg_rewrite_query(Query *query)
805 : {
806 : List *querytree_list;
807 :
808 725002 : if (Debug_print_parse)
809 0 : elog_node_display(LOG, "parse tree", query,
810 : Debug_pretty_print);
811 :
812 725002 : if (log_parser_stats)
813 0 : ResetUsage();
814 :
815 725002 : if (query->commandType == CMD_UTILITY)
816 : {
817 : /* don't rewrite utilities, just dump 'em into result list */
818 323878 : querytree_list = list_make1(query);
819 : }
820 : else
821 : {
822 : /* rewrite regular queries */
823 401124 : querytree_list = QueryRewrite(query);
824 : }
825 :
826 724414 : if (log_parser_stats)
827 0 : ShowUsage("REWRITER STATISTICS");
828 :
829 : #ifdef COPY_PARSE_PLAN_TREES
830 : /* Optional debugging check: pass querytree through copyObject() */
831 : {
832 : List *new_list;
833 :
834 724414 : new_list = copyObject(querytree_list);
835 : /* This checks both copyObject() and the equal() routines... */
836 724414 : if (!equal(new_list, querytree_list))
837 0 : elog(WARNING, "copyObject() failed to produce an equal rewritten parse tree");
838 : else
839 724414 : querytree_list = new_list;
840 : }
841 : #endif
842 :
843 : #ifdef WRITE_READ_PARSE_PLAN_TREES
844 : /* Optional debugging check: pass querytree through outfuncs/readfuncs */
845 : {
846 724414 : List *new_list = NIL;
847 : ListCell *lc;
848 :
849 1449470 : foreach(lc, querytree_list)
850 : {
851 725056 : Query *curr_query = lfirst_node(Query, lc);
852 725056 : char *str = nodeToStringWithLocations(curr_query);
853 725056 : Query *new_query = stringToNodeWithLocations(str);
854 :
855 : /*
856 : * queryId is not saved in stored rules, but we must preserve it
857 : * here to avoid breaking pg_stat_statements.
858 : */
859 725056 : new_query->queryId = curr_query->queryId;
860 :
861 725056 : new_list = lappend(new_list, new_query);
862 725056 : pfree(str);
863 : }
864 :
865 : /* This checks both outfuncs/readfuncs and the equal() routines... */
866 724414 : if (!equal(new_list, querytree_list))
867 0 : elog(WARNING, "outfuncs/readfuncs failed to produce an equal rewritten parse tree");
868 : else
869 724414 : querytree_list = new_list;
870 : }
871 : #endif
872 :
873 724414 : if (Debug_print_rewritten)
874 0 : elog_node_display(LOG, "rewritten parse tree", querytree_list,
875 : Debug_pretty_print);
876 :
877 724414 : return querytree_list;
878 : }
879 :
880 :
881 : /*
882 : * Generate a plan for a single already-rewritten query.
883 : * This is a thin wrapper around planner() and takes the same parameters.
884 : */
885 : PlannedStmt *
886 430876 : pg_plan_query(Query *querytree, const char *query_string, int cursorOptions,
887 : ParamListInfo boundParams)
888 : {
889 : PlannedStmt *plan;
890 :
891 : /* Utility commands have no plans. */
892 430876 : if (querytree->commandType == CMD_UTILITY)
893 0 : return NULL;
894 :
895 : /* Planner must have a snapshot in case it calls user-defined functions. */
896 : Assert(ActiveSnapshotSet());
897 :
898 : TRACE_POSTGRESQL_QUERY_PLAN_START();
899 :
900 430876 : if (log_planner_stats)
901 0 : ResetUsage();
902 :
903 : /* call the optimizer */
904 430876 : plan = planner(querytree, query_string, cursorOptions, boundParams);
905 :
906 427080 : if (log_planner_stats)
907 0 : ShowUsage("PLANNER STATISTICS");
908 :
909 : #ifdef COPY_PARSE_PLAN_TREES
910 : /* Optional debugging check: pass plan tree through copyObject() */
911 : {
912 427080 : PlannedStmt *new_plan = copyObject(plan);
913 :
914 : /*
915 : * equal() currently does not have routines to compare Plan nodes, so
916 : * don't try to test equality here. Perhaps fix someday?
917 : */
918 : #ifdef NOT_USED
919 : /* This checks both copyObject() and the equal() routines... */
920 : if (!equal(new_plan, plan))
921 : elog(WARNING, "copyObject() failed to produce an equal plan tree");
922 : else
923 : #endif
924 427080 : plan = new_plan;
925 : }
926 : #endif
927 :
928 : #ifdef WRITE_READ_PARSE_PLAN_TREES
929 : /* Optional debugging check: pass plan tree through outfuncs/readfuncs */
930 : {
931 : char *str;
932 : PlannedStmt *new_plan;
933 :
934 427080 : str = nodeToStringWithLocations(plan);
935 427080 : new_plan = stringToNodeWithLocations(str);
936 427080 : pfree(str);
937 :
938 : /*
939 : * equal() currently does not have routines to compare Plan nodes, so
940 : * don't try to test equality here. Perhaps fix someday?
941 : */
942 : #ifdef NOT_USED
943 : /* This checks both outfuncs/readfuncs and the equal() routines... */
944 : if (!equal(new_plan, plan))
945 : elog(WARNING, "outfuncs/readfuncs failed to produce an equal plan tree");
946 : else
947 : #endif
948 427080 : plan = new_plan;
949 : }
950 : #endif
951 :
952 : /*
953 : * Print plan if debugging.
954 : */
955 427080 : if (Debug_print_plan)
956 0 : elog_node_display(LOG, "plan", plan, Debug_pretty_print);
957 :
958 : TRACE_POSTGRESQL_QUERY_PLAN_DONE();
959 :
960 427080 : return plan;
961 : }
962 :
963 : /*
964 : * Generate plans for a list of already-rewritten queries.
965 : *
966 : * For normal optimizable statements, invoke the planner. For utility
967 : * statements, just make a wrapper PlannedStmt node.
968 : *
969 : * The result is a list of PlannedStmt nodes.
970 : */
971 : List *
972 693480 : pg_plan_queries(List *querytrees, const char *query_string, int cursorOptions,
973 : ParamListInfo boundParams)
974 : {
975 693480 : List *stmt_list = NIL;
976 : ListCell *query_list;
977 :
978 1383812 : foreach(query_list, querytrees)
979 : {
980 694080 : Query *query = lfirst_node(Query, query_list);
981 : PlannedStmt *stmt;
982 :
983 694080 : if (query->commandType == CMD_UTILITY)
984 : {
985 : /* Utility commands require no planning. */
986 323630 : stmt = makeNode(PlannedStmt);
987 323630 : stmt->commandType = CMD_UTILITY;
988 323630 : stmt->canSetTag = query->canSetTag;
989 323630 : stmt->utilityStmt = query->utilityStmt;
990 323630 : stmt->stmt_location = query->stmt_location;
991 323630 : stmt->stmt_len = query->stmt_len;
992 323630 : stmt->queryId = query->queryId;
993 : }
994 : else
995 : {
996 370450 : stmt = pg_plan_query(query, query_string, cursorOptions,
997 : boundParams);
998 : }
999 :
1000 690332 : stmt_list = lappend(stmt_list, stmt);
1001 : }
1002 :
1003 689732 : return stmt_list;
1004 : }
1005 :
1006 :
1007 : /*
1008 : * exec_simple_query
1009 : *
1010 : * Execute a "simple Query" protocol message.
1011 : */
1012 : static void
1013 574026 : exec_simple_query(const char *query_string)
1014 : {
1015 574026 : CommandDest dest = whereToSendOutput;
1016 : MemoryContext oldcontext;
1017 : List *parsetree_list;
1018 : ListCell *parsetree_item;
1019 574026 : bool save_log_statement_stats = log_statement_stats;
1020 574026 : bool was_logged = false;
1021 : bool use_implicit_block;
1022 : char msec_str[32];
1023 :
1024 : /*
1025 : * Report query to various monitoring facilities.
1026 : */
1027 574026 : debug_query_string = query_string;
1028 :
1029 574026 : pgstat_report_activity(STATE_RUNNING, query_string);
1030 :
1031 : TRACE_POSTGRESQL_QUERY_START(query_string);
1032 :
1033 : /*
1034 : * We use save_log_statement_stats so ShowUsage doesn't report incorrect
1035 : * results because ResetUsage wasn't called.
1036 : */
1037 574026 : if (save_log_statement_stats)
1038 0 : ResetUsage();
1039 :
1040 : /*
1041 : * Start up a transaction command. All queries generated by the
1042 : * query_string will be in this same command block, *unless* we find a
1043 : * BEGIN/COMMIT/ABORT statement; we have to force a new xact command after
1044 : * one of those, else bad things will happen in xact.c. (Note that this
1045 : * will normally change current memory context.)
1046 : */
1047 574026 : start_xact_command();
1048 :
1049 : /*
1050 : * Zap any pre-existing unnamed statement. (While not strictly necessary,
1051 : * it seems best to define simple-Query mode as if it used the unnamed
1052 : * statement and portal; this ensures we recover any storage used by prior
1053 : * unnamed operations.)
1054 : */
1055 574026 : drop_unnamed_stmt();
1056 :
1057 : /*
1058 : * Switch to appropriate context for constructing parsetrees.
1059 : */
1060 574026 : oldcontext = MemoryContextSwitchTo(MessageContext);
1061 :
1062 : /*
1063 : * Do basic parsing of the query or queries (this should be safe even if
1064 : * we are in aborted transaction state!)
1065 : */
1066 574026 : parsetree_list = pg_parse_query(query_string);
1067 :
1068 : /* Log immediately if dictated by log_statement */
1069 572962 : if (check_log_statement(parsetree_list))
1070 : {
1071 334800 : ereport(LOG,
1072 : (errmsg("statement: %s", query_string),
1073 : errhidestmt(true),
1074 : errdetail_execute(parsetree_list)));
1075 334800 : was_logged = true;
1076 : }
1077 :
1078 : /*
1079 : * Switch back to transaction context to enter the loop.
1080 : */
1081 572962 : MemoryContextSwitchTo(oldcontext);
1082 :
1083 : /*
1084 : * For historical reasons, if multiple SQL statements are given in a
1085 : * single "simple Query" message, we execute them as a single transaction,
1086 : * unless explicit transaction control commands are included to make
1087 : * portions of the list be separate transactions. To represent this
1088 : * behavior properly in the transaction machinery, we use an "implicit"
1089 : * transaction block.
1090 : */
1091 572962 : use_implicit_block = (list_length(parsetree_list) > 1);
1092 :
1093 : /*
1094 : * Run through the raw parsetree(s) and process each one.
1095 : */
1096 1146388 : foreach(parsetree_item, parsetree_list)
1097 : {
1098 611672 : RawStmt *parsetree = lfirst_node(RawStmt, parsetree_item);
1099 611672 : bool snapshot_set = false;
1100 : CommandTag commandTag;
1101 : QueryCompletion qc;
1102 611672 : MemoryContext per_parsetree_context = NULL;
1103 : List *querytree_list,
1104 : *plantree_list;
1105 : Portal portal;
1106 : DestReceiver *receiver;
1107 : int16 format;
1108 : const char *cmdtagname;
1109 : size_t cmdtaglen;
1110 :
1111 611672 : pgstat_report_query_id(0, true);
1112 :
1113 : /*
1114 : * Get the command name for use in status display (it also becomes the
1115 : * default completion tag, down inside PortalRun). Set ps_status and
1116 : * do any special start-of-SQL-command processing needed by the
1117 : * destination.
1118 : */
1119 611672 : commandTag = CreateCommandTag(parsetree->stmt);
1120 611672 : cmdtagname = GetCommandTagNameAndLen(commandTag, &cmdtaglen);
1121 :
1122 611672 : set_ps_display_with_len(cmdtagname, cmdtaglen);
1123 :
1124 611672 : BeginCommand(commandTag, dest);
1125 :
1126 : /*
1127 : * If we are in an aborted transaction, reject all commands except
1128 : * COMMIT/ABORT. It is important that this test occur before we try
1129 : * to do parse analysis, rewrite, or planning, since all those phases
1130 : * try to do database accesses, which may fail in abort state. (It
1131 : * might be safe to allow some additional utility commands in this
1132 : * state, but not many...)
1133 : */
1134 611672 : if (IsAbortedTransactionBlockState() &&
1135 1674 : !IsTransactionExitStmt(parsetree->stmt))
1136 96 : ereport(ERROR,
1137 : (errcode(ERRCODE_IN_FAILED_SQL_TRANSACTION),
1138 : errmsg("current transaction is aborted, "
1139 : "commands ignored until end of transaction block"),
1140 : errdetail_abort()));
1141 :
1142 : /* Make sure we are in a transaction command */
1143 611576 : start_xact_command();
1144 :
1145 : /*
1146 : * If using an implicit transaction block, and we're not already in a
1147 : * transaction block, start an implicit block to force this statement
1148 : * to be grouped together with any following ones. (We must do this
1149 : * each time through the loop; otherwise, a COMMIT/ROLLBACK in the
1150 : * list would cause later statements to not be grouped.)
1151 : */
1152 611576 : if (use_implicit_block)
1153 50048 : BeginImplicitTransactionBlock();
1154 :
1155 : /* If we got a cancel signal in parsing or prior command, quit */
1156 611576 : CHECK_FOR_INTERRUPTS();
1157 :
1158 : /*
1159 : * Set up a snapshot if parse analysis/planning will need one.
1160 : */
1161 611576 : if (analyze_requires_snapshot(parsetree))
1162 : {
1163 325924 : PushActiveSnapshot(GetTransactionSnapshot());
1164 325924 : snapshot_set = true;
1165 : }
1166 :
1167 : /*
1168 : * OK to analyze, rewrite, and plan this query.
1169 : *
1170 : * Switch to appropriate context for constructing query and plan trees
1171 : * (these can't be in the transaction context, as that will get reset
1172 : * when the command is COMMIT/ROLLBACK). If we have multiple
1173 : * parsetrees, we use a separate context for each one, so that we can
1174 : * free that memory before moving on to the next one. But for the
1175 : * last (or only) parsetree, just use MessageContext, which will be
1176 : * reset shortly after completion anyway. In event of an error, the
1177 : * per_parsetree_context will be deleted when MessageContext is reset.
1178 : */
1179 611576 : if (lnext(parsetree_list, parsetree_item) != NULL)
1180 : {
1181 : per_parsetree_context =
1182 39182 : AllocSetContextCreate(MessageContext,
1183 : "per-parsetree message context",
1184 : ALLOCSET_DEFAULT_SIZES);
1185 39182 : oldcontext = MemoryContextSwitchTo(per_parsetree_context);
1186 : }
1187 : else
1188 572394 : oldcontext = MemoryContextSwitchTo(MessageContext);
1189 :
1190 611576 : querytree_list = pg_analyze_and_rewrite_fixedparams(parsetree, query_string,
1191 : NULL, 0, NULL);
1192 :
1193 603662 : plantree_list = pg_plan_queries(querytree_list, query_string,
1194 : CURSOR_OPT_PARALLEL_OK, NULL);
1195 :
1196 : /*
1197 : * Done with the snapshot used for parsing/planning.
1198 : *
1199 : * While it looks promising to reuse the same snapshot for query
1200 : * execution (at least for simple protocol), unfortunately it causes
1201 : * execution to use a snapshot that has been acquired before locking
1202 : * any of the tables mentioned in the query. This creates user-
1203 : * visible anomalies, so refrain. Refer to
1204 : * https://postgr.es/m/flat/5075D8DF.6050500@fuzzy.cz for details.
1205 : */
1206 600082 : if (snapshot_set)
1207 314430 : PopActiveSnapshot();
1208 :
1209 : /* If we got a cancel signal in analysis or planning, quit */
1210 600082 : CHECK_FOR_INTERRUPTS();
1211 :
1212 : /*
1213 : * Create unnamed portal to run the query or queries in. If there
1214 : * already is one, silently drop it.
1215 : */
1216 600082 : portal = CreatePortal("", true, true);
1217 : /* Don't display the portal in pg_cursors */
1218 600082 : portal->visible = false;
1219 :
1220 : /*
1221 : * We don't have to copy anything into the portal, because everything
1222 : * we are passing here is in MessageContext or the
1223 : * per_parsetree_context, and so will outlive the portal anyway.
1224 : */
1225 600082 : PortalDefineQuery(portal,
1226 : NULL,
1227 : query_string,
1228 : commandTag,
1229 : plantree_list,
1230 : NULL);
1231 :
1232 : /*
1233 : * Start the portal. No parameters here.
1234 : */
1235 600082 : PortalStart(portal, NULL, 0, InvalidSnapshot);
1236 :
1237 : /*
1238 : * Select the appropriate output format: text unless we are doing a
1239 : * FETCH from a binary cursor. (Pretty grotty to have to do this here
1240 : * --- but it avoids grottiness in other places. Ah, the joys of
1241 : * backward compatibility...)
1242 : */
1243 599416 : format = 0; /* TEXT is default */
1244 599416 : if (IsA(parsetree->stmt, FetchStmt))
1245 : {
1246 5954 : FetchStmt *stmt = (FetchStmt *) parsetree->stmt;
1247 :
1248 5954 : if (!stmt->ismove)
1249 : {
1250 5850 : Portal fportal = GetPortalByName(stmt->portalname);
1251 :
1252 5850 : if (PortalIsValid(fportal) &&
1253 5816 : (fportal->cursorOptions & CURSOR_OPT_BINARY))
1254 8 : format = 1; /* BINARY */
1255 : }
1256 : }
1257 599416 : PortalSetResultFormat(portal, 1, &format);
1258 :
1259 : /*
1260 : * Now we can create the destination receiver object.
1261 : */
1262 599416 : receiver = CreateDestReceiver(dest);
1263 599416 : if (dest == DestRemote)
1264 539224 : SetRemoteDestReceiverParams(receiver, portal);
1265 :
1266 : /*
1267 : * Switch back to transaction context for execution.
1268 : */
1269 599416 : MemoryContextSwitchTo(oldcontext);
1270 :
1271 : /*
1272 : * Run the portal to completion, and then drop it (and the receiver).
1273 : */
1274 599416 : (void) PortalRun(portal,
1275 : FETCH_ALL,
1276 : true, /* always top level */
1277 : true,
1278 : receiver,
1279 : receiver,
1280 : &qc);
1281 :
1282 573972 : receiver->rDestroy(receiver);
1283 :
1284 573972 : PortalDrop(portal, false);
1285 :
1286 573972 : if (lnext(parsetree_list, parsetree_item) == NULL)
1287 : {
1288 : /*
1289 : * If this is the last parsetree of the query string, close down
1290 : * transaction statement before reporting command-complete. This
1291 : * is so that any end-of-transaction errors are reported before
1292 : * the command-complete message is issued, to avoid confusing
1293 : * clients who will expect either a command-complete message or an
1294 : * error, not one and then the other. Also, if we're using an
1295 : * implicit transaction block, we must close that out first.
1296 : */
1297 534834 : if (use_implicit_block)
1298 10776 : EndImplicitTransactionBlock();
1299 534834 : finish_xact_command();
1300 : }
1301 39138 : else if (IsA(parsetree->stmt, TransactionStmt))
1302 : {
1303 : /*
1304 : * If this was a transaction control statement, commit it. We will
1305 : * start a new xact command for the next command.
1306 : */
1307 1052 : finish_xact_command();
1308 : }
1309 : else
1310 : {
1311 : /*
1312 : * We had better not see XACT_FLAGS_NEEDIMMEDIATECOMMIT set if
1313 : * we're not calling finish_xact_command(). (The implicit
1314 : * transaction block should have prevented it from getting set.)
1315 : */
1316 : Assert(!(MyXactFlags & XACT_FLAGS_NEEDIMMEDIATECOMMIT));
1317 :
1318 : /*
1319 : * We need a CommandCounterIncrement after every query, except
1320 : * those that start or end a transaction block.
1321 : */
1322 38086 : CommandCounterIncrement();
1323 :
1324 : /*
1325 : * Disable statement timeout between queries of a multi-query
1326 : * string, so that the timeout applies separately to each query.
1327 : * (Our next loop iteration will start a fresh timeout.)
1328 : */
1329 38086 : disable_statement_timeout();
1330 : }
1331 :
1332 : /*
1333 : * Tell client that we're done with this query. Note we emit exactly
1334 : * one EndCommand report for each raw parsetree, thus one for each SQL
1335 : * command the client sent, regardless of rewriting. (But a command
1336 : * aborted by error will not send an EndCommand report at all.)
1337 : */
1338 573426 : EndCommand(&qc, dest, false);
1339 :
1340 : /* Now we may drop the per-parsetree context, if one was created. */
1341 573426 : if (per_parsetree_context)
1342 39138 : MemoryContextDelete(per_parsetree_context);
1343 : } /* end loop over parsetrees */
1344 :
1345 : /*
1346 : * Close down transaction statement, if one is open. (This will only do
1347 : * something if the parsetree list was empty; otherwise the last loop
1348 : * iteration already did it.)
1349 : */
1350 534716 : finish_xact_command();
1351 :
1352 : /*
1353 : * If there were no parsetrees, return EmptyQueryResponse message.
1354 : */
1355 534716 : if (!parsetree_list)
1356 428 : NullCommand(dest);
1357 :
1358 : /*
1359 : * Emit duration logging if appropriate.
1360 : */
1361 534716 : switch (check_log_duration(msec_str, was_logged))
1362 : {
1363 18 : case 1:
1364 18 : ereport(LOG,
1365 : (errmsg("duration: %s ms", msec_str),
1366 : errhidestmt(true)));
1367 18 : break;
1368 0 : case 2:
1369 0 : ereport(LOG,
1370 : (errmsg("duration: %s ms statement: %s",
1371 : msec_str, query_string),
1372 : errhidestmt(true),
1373 : errdetail_execute(parsetree_list)));
1374 0 : break;
1375 : }
1376 :
1377 534716 : if (save_log_statement_stats)
1378 0 : ShowUsage("QUERY STATISTICS");
1379 :
1380 : TRACE_POSTGRESQL_QUERY_DONE(query_string);
1381 :
1382 534716 : debug_query_string = NULL;
1383 534716 : }
1384 :
1385 : /*
1386 : * exec_parse_message
1387 : *
1388 : * Execute a "Parse" protocol message.
1389 : */
1390 : static void
1391 10072 : exec_parse_message(const char *query_string, /* string to execute */
1392 : const char *stmt_name, /* name for prepared stmt */
1393 : Oid *paramTypes, /* parameter types */
1394 : int numParams) /* number of parameters */
1395 : {
1396 10072 : MemoryContext unnamed_stmt_context = NULL;
1397 : MemoryContext oldcontext;
1398 : List *parsetree_list;
1399 : RawStmt *raw_parse_tree;
1400 : List *querytree_list;
1401 : CachedPlanSource *psrc;
1402 : bool is_named;
1403 10072 : bool save_log_statement_stats = log_statement_stats;
1404 : char msec_str[32];
1405 :
1406 : /*
1407 : * Report query to various monitoring facilities.
1408 : */
1409 10072 : debug_query_string = query_string;
1410 :
1411 10072 : pgstat_report_activity(STATE_RUNNING, query_string);
1412 :
1413 10072 : set_ps_display("PARSE");
1414 :
1415 10072 : if (save_log_statement_stats)
1416 0 : ResetUsage();
1417 :
1418 10072 : ereport(DEBUG2,
1419 : (errmsg_internal("parse %s: %s",
1420 : *stmt_name ? stmt_name : "<unnamed>",
1421 : query_string)));
1422 :
1423 : /*
1424 : * Start up a transaction command so we can run parse analysis etc. (Note
1425 : * that this will normally change current memory context.) Nothing happens
1426 : * if we are already in one. This also arms the statement timeout if
1427 : * necessary.
1428 : */
1429 10072 : start_xact_command();
1430 :
1431 : /*
1432 : * Switch to appropriate context for constructing parsetrees.
1433 : *
1434 : * We have two strategies depending on whether the prepared statement is
1435 : * named or not. For a named prepared statement, we do parsing in
1436 : * MessageContext and copy the finished trees into the prepared
1437 : * statement's plancache entry; then the reset of MessageContext releases
1438 : * temporary space used by parsing and rewriting. For an unnamed prepared
1439 : * statement, we assume the statement isn't going to hang around long, so
1440 : * getting rid of temp space quickly is probably not worth the costs of
1441 : * copying parse trees. So in this case, we create the plancache entry's
1442 : * query_context here, and do all the parsing work therein.
1443 : */
1444 10072 : is_named = (stmt_name[0] != '\0');
1445 10072 : if (is_named)
1446 : {
1447 : /* Named prepared statement --- parse in MessageContext */
1448 4246 : oldcontext = MemoryContextSwitchTo(MessageContext);
1449 : }
1450 : else
1451 : {
1452 : /* Unnamed prepared statement --- release any prior unnamed stmt */
1453 5826 : drop_unnamed_stmt();
1454 : /* Create context for parsing */
1455 : unnamed_stmt_context =
1456 5826 : AllocSetContextCreate(MessageContext,
1457 : "unnamed prepared statement",
1458 : ALLOCSET_DEFAULT_SIZES);
1459 5826 : oldcontext = MemoryContextSwitchTo(unnamed_stmt_context);
1460 : }
1461 :
1462 : /*
1463 : * Do basic parsing of the query or queries (this should be safe even if
1464 : * we are in aborted transaction state!)
1465 : */
1466 10072 : parsetree_list = pg_parse_query(query_string);
1467 :
1468 : /*
1469 : * We only allow a single user statement in a prepared statement. This is
1470 : * mainly to keep the protocol simple --- otherwise we'd need to worry
1471 : * about multiple result tupdescs and things like that.
1472 : */
1473 10058 : if (list_length(parsetree_list) > 1)
1474 8 : ereport(ERROR,
1475 : (errcode(ERRCODE_SYNTAX_ERROR),
1476 : errmsg("cannot insert multiple commands into a prepared statement")));
1477 :
1478 10050 : if (parsetree_list != NIL)
1479 : {
1480 10044 : bool snapshot_set = false;
1481 :
1482 10044 : raw_parse_tree = linitial_node(RawStmt, parsetree_list);
1483 :
1484 : /*
1485 : * If we are in an aborted transaction, reject all commands except
1486 : * COMMIT/ROLLBACK. It is important that this test occur before we
1487 : * try to do parse analysis, rewrite, or planning, since all those
1488 : * phases try to do database accesses, which may fail in abort state.
1489 : * (It might be safe to allow some additional utility commands in this
1490 : * state, but not many...)
1491 : */
1492 10044 : if (IsAbortedTransactionBlockState() &&
1493 2 : !IsTransactionExitStmt(raw_parse_tree->stmt))
1494 2 : ereport(ERROR,
1495 : (errcode(ERRCODE_IN_FAILED_SQL_TRANSACTION),
1496 : errmsg("current transaction is aborted, "
1497 : "commands ignored until end of transaction block"),
1498 : errdetail_abort()));
1499 :
1500 : /*
1501 : * Create the CachedPlanSource before we do parse analysis, since it
1502 : * needs to see the unmodified raw parse tree.
1503 : */
1504 10042 : psrc = CreateCachedPlan(raw_parse_tree, query_string,
1505 : CreateCommandTag(raw_parse_tree->stmt));
1506 :
1507 : /*
1508 : * Set up a snapshot if parse analysis will need one.
1509 : */
1510 10042 : if (analyze_requires_snapshot(raw_parse_tree))
1511 : {
1512 9496 : PushActiveSnapshot(GetTransactionSnapshot());
1513 9496 : snapshot_set = true;
1514 : }
1515 :
1516 : /*
1517 : * Analyze and rewrite the query. Note that the originally specified
1518 : * parameter set is not required to be complete, so we have to use
1519 : * pg_analyze_and_rewrite_varparams().
1520 : */
1521 10042 : querytree_list = pg_analyze_and_rewrite_varparams(raw_parse_tree,
1522 : query_string,
1523 : ¶mTypes,
1524 : &numParams,
1525 : NULL);
1526 :
1527 : /* Done with the snapshot used for parsing */
1528 10026 : if (snapshot_set)
1529 9480 : PopActiveSnapshot();
1530 : }
1531 : else
1532 : {
1533 : /* Empty input string. This is legal. */
1534 6 : raw_parse_tree = NULL;
1535 6 : psrc = CreateCachedPlan(raw_parse_tree, query_string,
1536 : CMDTAG_UNKNOWN);
1537 6 : querytree_list = NIL;
1538 : }
1539 :
1540 : /*
1541 : * CachedPlanSource must be a direct child of MessageContext before we
1542 : * reparent unnamed_stmt_context under it, else we have a disconnected
1543 : * circular subgraph. Klugy, but less so than flipping contexts even more
1544 : * above.
1545 : */
1546 10032 : if (unnamed_stmt_context)
1547 5788 : MemoryContextSetParent(psrc->context, MessageContext);
1548 :
1549 : /* Finish filling in the CachedPlanSource */
1550 10032 : CompleteCachedPlan(psrc,
1551 : querytree_list,
1552 : unnamed_stmt_context,
1553 : paramTypes,
1554 : numParams,
1555 : NULL,
1556 : NULL,
1557 : CURSOR_OPT_PARALLEL_OK, /* allow parallel mode */
1558 : true); /* fixed result */
1559 :
1560 : /* If we got a cancel signal during analysis, quit */
1561 10032 : CHECK_FOR_INTERRUPTS();
1562 :
1563 10032 : if (is_named)
1564 : {
1565 : /*
1566 : * Store the query as a prepared statement.
1567 : */
1568 4244 : StorePreparedStatement(stmt_name, psrc, false);
1569 : }
1570 : else
1571 : {
1572 : /*
1573 : * We just save the CachedPlanSource into unnamed_stmt_psrc.
1574 : */
1575 5788 : SaveCachedPlan(psrc);
1576 5788 : unnamed_stmt_psrc = psrc;
1577 : }
1578 :
1579 10032 : MemoryContextSwitchTo(oldcontext);
1580 :
1581 : /*
1582 : * We do NOT close the open transaction command here; that only happens
1583 : * when the client sends Sync. Instead, do CommandCounterIncrement just
1584 : * in case something happened during parse/plan.
1585 : */
1586 10032 : CommandCounterIncrement();
1587 :
1588 : /*
1589 : * Send ParseComplete.
1590 : */
1591 10032 : if (whereToSendOutput == DestRemote)
1592 10032 : pq_putemptymessage(PqMsg_ParseComplete);
1593 :
1594 : /*
1595 : * Emit duration logging if appropriate.
1596 : */
1597 10032 : switch (check_log_duration(msec_str, false))
1598 : {
1599 0 : case 1:
1600 0 : ereport(LOG,
1601 : (errmsg("duration: %s ms", msec_str),
1602 : errhidestmt(true)));
1603 0 : break;
1604 26 : case 2:
1605 26 : ereport(LOG,
1606 : (errmsg("duration: %s ms parse %s: %s",
1607 : msec_str,
1608 : *stmt_name ? stmt_name : "<unnamed>",
1609 : query_string),
1610 : errhidestmt(true)));
1611 26 : break;
1612 : }
1613 :
1614 10032 : if (save_log_statement_stats)
1615 0 : ShowUsage("PARSE MESSAGE STATISTICS");
1616 :
1617 10032 : debug_query_string = NULL;
1618 10032 : }
1619 :
1620 : /*
1621 : * exec_bind_message
1622 : *
1623 : * Process a "Bind" message to create a portal from a prepared statement
1624 : */
1625 : static void
1626 19808 : exec_bind_message(StringInfo input_message)
1627 : {
1628 : const char *portal_name;
1629 : const char *stmt_name;
1630 : int numPFormats;
1631 19808 : int16 *pformats = NULL;
1632 : int numParams;
1633 : int numRFormats;
1634 19808 : int16 *rformats = NULL;
1635 : CachedPlanSource *psrc;
1636 : CachedPlan *cplan;
1637 : Portal portal;
1638 : char *query_string;
1639 : char *saved_stmt_name;
1640 : ParamListInfo params;
1641 : MemoryContext oldContext;
1642 19808 : bool save_log_statement_stats = log_statement_stats;
1643 19808 : bool snapshot_set = false;
1644 : char msec_str[32];
1645 : ParamsErrorCbData params_data;
1646 : ErrorContextCallback params_errcxt;
1647 :
1648 : /* Get the fixed part of the message */
1649 19808 : portal_name = pq_getmsgstring(input_message);
1650 19808 : stmt_name = pq_getmsgstring(input_message);
1651 :
1652 19808 : ereport(DEBUG2,
1653 : (errmsg_internal("bind %s to %s",
1654 : *portal_name ? portal_name : "<unnamed>",
1655 : *stmt_name ? stmt_name : "<unnamed>")));
1656 :
1657 : /* Find prepared statement */
1658 19808 : if (stmt_name[0] != '\0')
1659 : {
1660 : PreparedStatement *pstmt;
1661 :
1662 14074 : pstmt = FetchPreparedStatement(stmt_name, true);
1663 14072 : psrc = pstmt->plansource;
1664 : }
1665 : else
1666 : {
1667 : /* special-case the unnamed statement */
1668 5734 : psrc = unnamed_stmt_psrc;
1669 5734 : if (!psrc)
1670 0 : ereport(ERROR,
1671 : (errcode(ERRCODE_UNDEFINED_PSTATEMENT),
1672 : errmsg("unnamed prepared statement does not exist")));
1673 : }
1674 :
1675 : /*
1676 : * Report query to various monitoring facilities.
1677 : */
1678 19806 : debug_query_string = psrc->query_string;
1679 :
1680 19806 : pgstat_report_activity(STATE_RUNNING, psrc->query_string);
1681 :
1682 19806 : set_ps_display("BIND");
1683 :
1684 19806 : if (save_log_statement_stats)
1685 0 : ResetUsage();
1686 :
1687 : /*
1688 : * Start up a transaction command so we can call functions etc. (Note that
1689 : * this will normally change current memory context.) Nothing happens if
1690 : * we are already in one. This also arms the statement timeout if
1691 : * necessary.
1692 : */
1693 19806 : start_xact_command();
1694 :
1695 : /* Switch back to message context */
1696 19806 : MemoryContextSwitchTo(MessageContext);
1697 :
1698 : /* Get the parameter format codes */
1699 19806 : numPFormats = pq_getmsgint(input_message, 2);
1700 19806 : if (numPFormats > 0)
1701 : {
1702 5108 : pformats = palloc_array(int16, numPFormats);
1703 12036 : for (int i = 0; i < numPFormats; i++)
1704 6928 : pformats[i] = pq_getmsgint(input_message, 2);
1705 : }
1706 :
1707 : /* Get the parameter value count */
1708 19806 : numParams = pq_getmsgint(input_message, 2);
1709 :
1710 19806 : if (numPFormats > 1 && numPFormats != numParams)
1711 0 : ereport(ERROR,
1712 : (errcode(ERRCODE_PROTOCOL_VIOLATION),
1713 : errmsg("bind message has %d parameter formats but %d parameters",
1714 : numPFormats, numParams)));
1715 :
1716 19806 : if (numParams != psrc->num_params)
1717 6 : ereport(ERROR,
1718 : (errcode(ERRCODE_PROTOCOL_VIOLATION),
1719 : errmsg("bind message supplies %d parameters, but prepared statement \"%s\" requires %d",
1720 : numParams, stmt_name, psrc->num_params)));
1721 :
1722 : /*
1723 : * If we are in aborted transaction state, the only portals we can
1724 : * actually run are those containing COMMIT or ROLLBACK commands. We
1725 : * disallow binding anything else to avoid problems with infrastructure
1726 : * that expects to run inside a valid transaction. We also disallow
1727 : * binding any parameters, since we can't risk calling user-defined I/O
1728 : * functions.
1729 : */
1730 19800 : if (IsAbortedTransactionBlockState() &&
1731 4 : (!(psrc->raw_parse_tree &&
1732 4 : IsTransactionExitStmt(psrc->raw_parse_tree->stmt)) ||
1733 : numParams != 0))
1734 0 : ereport(ERROR,
1735 : (errcode(ERRCODE_IN_FAILED_SQL_TRANSACTION),
1736 : errmsg("current transaction is aborted, "
1737 : "commands ignored until end of transaction block"),
1738 : errdetail_abort()));
1739 :
1740 : /*
1741 : * Create the portal. Allow silent replacement of an existing portal only
1742 : * if the unnamed portal is specified.
1743 : */
1744 19800 : if (portal_name[0] == '\0')
1745 19800 : portal = CreatePortal(portal_name, true, true);
1746 : else
1747 0 : portal = CreatePortal(portal_name, false, false);
1748 :
1749 : /*
1750 : * Prepare to copy stuff into the portal's memory context. We do all this
1751 : * copying first, because it could possibly fail (out-of-memory) and we
1752 : * don't want a failure to occur between GetCachedPlan and
1753 : * PortalDefineQuery; that would result in leaking our plancache refcount.
1754 : */
1755 19800 : oldContext = MemoryContextSwitchTo(portal->portalContext);
1756 :
1757 : /* Copy the plan's query string into the portal */
1758 19800 : query_string = pstrdup(psrc->query_string);
1759 :
1760 : /* Likewise make a copy of the statement name, unless it's unnamed */
1761 19800 : if (stmt_name[0])
1762 14072 : saved_stmt_name = pstrdup(stmt_name);
1763 : else
1764 5728 : saved_stmt_name = NULL;
1765 :
1766 : /*
1767 : * Set a snapshot if we have parameters to fetch (since the input
1768 : * functions might need it) or the query isn't a utility command (and
1769 : * hence could require redoing parse analysis and planning). We keep the
1770 : * snapshot active till we're done, so that plancache.c doesn't have to
1771 : * take new ones.
1772 : */
1773 19800 : if (numParams > 0 ||
1774 6764 : (psrc->raw_parse_tree &&
1775 3382 : analyze_requires_snapshot(psrc->raw_parse_tree)))
1776 : {
1777 18398 : PushActiveSnapshot(GetTransactionSnapshot());
1778 18398 : snapshot_set = true;
1779 : }
1780 :
1781 : /*
1782 : * Fetch parameters, if any, and store in the portal's memory context.
1783 : */
1784 19800 : if (numParams > 0)
1785 : {
1786 16418 : char **knownTextValues = NULL; /* allocate on first use */
1787 : BindParamCbData one_param_data;
1788 :
1789 : /*
1790 : * Set up an error callback so that if there's an error in this phase,
1791 : * we can report the specific parameter causing the problem.
1792 : */
1793 16418 : one_param_data.portalName = portal->name;
1794 16418 : one_param_data.paramno = -1;
1795 16418 : one_param_data.paramval = NULL;
1796 16418 : params_errcxt.previous = error_context_stack;
1797 16418 : params_errcxt.callback = bind_param_error_callback;
1798 16418 : params_errcxt.arg = (void *) &one_param_data;
1799 16418 : error_context_stack = ¶ms_errcxt;
1800 :
1801 16418 : params = makeParamList(numParams);
1802 :
1803 43748 : for (int paramno = 0; paramno < numParams; paramno++)
1804 : {
1805 27332 : Oid ptype = psrc->param_types[paramno];
1806 : int32 plength;
1807 : Datum pval;
1808 : bool isNull;
1809 : StringInfoData pbuf;
1810 : char csave;
1811 : int16 pformat;
1812 :
1813 27332 : one_param_data.paramno = paramno;
1814 27332 : one_param_data.paramval = NULL;
1815 :
1816 27332 : plength = pq_getmsgint(input_message, 4);
1817 27332 : isNull = (plength == -1);
1818 :
1819 27332 : if (!isNull)
1820 : {
1821 : char *pvalue;
1822 :
1823 : /*
1824 : * Rather than copying data around, we just initialize a
1825 : * StringInfo pointing to the correct portion of the message
1826 : * buffer. We assume we can scribble on the message buffer to
1827 : * add a trailing NUL which is required for the input function
1828 : * call.
1829 : */
1830 26114 : pvalue = unconstify(char *, pq_getmsgbytes(input_message, plength));
1831 26114 : csave = pvalue[plength];
1832 26114 : pvalue[plength] = '\0';
1833 26114 : initReadOnlyStringInfo(&pbuf, pvalue, plength);
1834 : }
1835 : else
1836 : {
1837 1218 : pbuf.data = NULL; /* keep compiler quiet */
1838 1218 : csave = 0;
1839 : }
1840 :
1841 27332 : if (numPFormats > 1)
1842 3544 : pformat = pformats[paramno];
1843 23788 : else if (numPFormats > 0)
1844 3384 : pformat = pformats[0];
1845 : else
1846 20404 : pformat = 0; /* default = text */
1847 :
1848 27332 : if (pformat == 0) /* text mode */
1849 : {
1850 : Oid typinput;
1851 : Oid typioparam;
1852 : char *pstring;
1853 :
1854 27280 : getTypeInputInfo(ptype, &typinput, &typioparam);
1855 :
1856 : /*
1857 : * We have to do encoding conversion before calling the
1858 : * typinput routine.
1859 : */
1860 27280 : if (isNull)
1861 1218 : pstring = NULL;
1862 : else
1863 26062 : pstring = pg_client_to_server(pbuf.data, plength);
1864 :
1865 : /* Now we can log the input string in case of error */
1866 27280 : one_param_data.paramval = pstring;
1867 :
1868 27280 : pval = OidInputFunctionCall(typinput, pstring, typioparam, -1);
1869 :
1870 27278 : one_param_data.paramval = NULL;
1871 :
1872 : /*
1873 : * If we might need to log parameters later, save a copy of
1874 : * the converted string in MessageContext; then free the
1875 : * result of encoding conversion, if any was done.
1876 : */
1877 27278 : if (pstring)
1878 : {
1879 26060 : if (log_parameter_max_length_on_error != 0)
1880 : {
1881 : MemoryContext oldcxt;
1882 :
1883 14 : oldcxt = MemoryContextSwitchTo(MessageContext);
1884 :
1885 14 : if (knownTextValues == NULL)
1886 10 : knownTextValues = palloc0_array(char *, numParams);
1887 :
1888 14 : if (log_parameter_max_length_on_error < 0)
1889 8 : knownTextValues[paramno] = pstrdup(pstring);
1890 : else
1891 : {
1892 : /*
1893 : * We can trim the saved string, knowing that we
1894 : * won't print all of it. But we must copy at
1895 : * least two more full characters than
1896 : * BuildParamLogString wants to use; otherwise it
1897 : * might fail to include the trailing ellipsis.
1898 : */
1899 6 : knownTextValues[paramno] =
1900 6 : pnstrdup(pstring,
1901 : log_parameter_max_length_on_error
1902 6 : + 2 * MAX_MULTIBYTE_CHAR_LEN);
1903 : }
1904 :
1905 14 : MemoryContextSwitchTo(oldcxt);
1906 : }
1907 26060 : if (pstring != pbuf.data)
1908 0 : pfree(pstring);
1909 : }
1910 : }
1911 52 : else if (pformat == 1) /* binary mode */
1912 : {
1913 : Oid typreceive;
1914 : Oid typioparam;
1915 : StringInfo bufptr;
1916 :
1917 : /*
1918 : * Call the parameter type's binary input converter
1919 : */
1920 52 : getTypeBinaryInputInfo(ptype, &typreceive, &typioparam);
1921 :
1922 52 : if (isNull)
1923 0 : bufptr = NULL;
1924 : else
1925 52 : bufptr = &pbuf;
1926 :
1927 52 : pval = OidReceiveFunctionCall(typreceive, bufptr, typioparam, -1);
1928 :
1929 : /* Trouble if it didn't eat the whole buffer */
1930 52 : if (!isNull && pbuf.cursor != pbuf.len)
1931 0 : ereport(ERROR,
1932 : (errcode(ERRCODE_INVALID_BINARY_REPRESENTATION),
1933 : errmsg("incorrect binary data format in bind parameter %d",
1934 : paramno + 1)));
1935 : }
1936 : else
1937 : {
1938 0 : ereport(ERROR,
1939 : (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
1940 : errmsg("unsupported format code: %d",
1941 : pformat)));
1942 : pval = 0; /* keep compiler quiet */
1943 : }
1944 :
1945 : /* Restore message buffer contents */
1946 27330 : if (!isNull)
1947 26112 : pbuf.data[plength] = csave;
1948 :
1949 27330 : params->params[paramno].value = pval;
1950 27330 : params->params[paramno].isnull = isNull;
1951 :
1952 : /*
1953 : * We mark the params as CONST. This ensures that any custom plan
1954 : * makes full use of the parameter values.
1955 : */
1956 27330 : params->params[paramno].pflags = PARAM_FLAG_CONST;
1957 27330 : params->params[paramno].ptype = ptype;
1958 : }
1959 :
1960 : /* Pop the per-parameter error callback */
1961 16416 : error_context_stack = error_context_stack->previous;
1962 :
1963 : /*
1964 : * Once all parameters have been received, prepare for printing them
1965 : * in future errors, if configured to do so. (This is saved in the
1966 : * portal, so that they'll appear when the query is executed later.)
1967 : */
1968 16416 : if (log_parameter_max_length_on_error != 0)
1969 8 : params->paramValuesStr =
1970 8 : BuildParamLogString(params,
1971 : knownTextValues,
1972 : log_parameter_max_length_on_error);
1973 : }
1974 : else
1975 3382 : params = NULL;
1976 :
1977 : /* Done storing stuff in portal's context */
1978 19798 : MemoryContextSwitchTo(oldContext);
1979 :
1980 : /*
1981 : * Set up another error callback so that all the parameters are logged if
1982 : * we get an error during the rest of the BIND processing.
1983 : */
1984 19798 : params_data.portalName = portal->name;
1985 19798 : params_data.params = params;
1986 19798 : params_errcxt.previous = error_context_stack;
1987 19798 : params_errcxt.callback = ParamsErrorCallback;
1988 19798 : params_errcxt.arg = (void *) ¶ms_data;
1989 19798 : error_context_stack = ¶ms_errcxt;
1990 :
1991 : /* Get the result format codes */
1992 19798 : numRFormats = pq_getmsgint(input_message, 2);
1993 19798 : if (numRFormats > 0)
1994 : {
1995 19798 : rformats = palloc_array(int16, numRFormats);
1996 39596 : for (int i = 0; i < numRFormats; i++)
1997 19798 : rformats[i] = pq_getmsgint(input_message, 2);
1998 : }
1999 :
2000 19798 : pq_getmsgend(input_message);
2001 :
2002 : /*
2003 : * Obtain a plan from the CachedPlanSource. Any cruft from (re)planning
2004 : * will be generated in MessageContext. The plan refcount will be
2005 : * assigned to the Portal, so it will be released at portal destruction.
2006 : */
2007 19798 : cplan = GetCachedPlan(psrc, params, NULL, NULL);
2008 :
2009 : /*
2010 : * Now we can define the portal.
2011 : *
2012 : * DO NOT put any code that could possibly throw an error between the
2013 : * above GetCachedPlan call and here.
2014 : */
2015 19796 : PortalDefineQuery(portal,
2016 : saved_stmt_name,
2017 : query_string,
2018 : psrc->commandTag,
2019 : cplan->stmt_list,
2020 : cplan);
2021 :
2022 : /* Done with the snapshot used for parameter I/O and parsing/planning */
2023 19796 : if (snapshot_set)
2024 18394 : PopActiveSnapshot();
2025 :
2026 : /*
2027 : * And we're ready to start portal execution.
2028 : */
2029 19796 : PortalStart(portal, params, 0, InvalidSnapshot);
2030 :
2031 : /*
2032 : * Apply the result format requests to the portal.
2033 : */
2034 19796 : PortalSetResultFormat(portal, numRFormats, rformats);
2035 :
2036 : /*
2037 : * Done binding; remove the parameters error callback. Entries emitted
2038 : * later determine independently whether to log the parameters or not.
2039 : */
2040 19796 : error_context_stack = error_context_stack->previous;
2041 :
2042 : /*
2043 : * Send BindComplete.
2044 : */
2045 19796 : if (whereToSendOutput == DestRemote)
2046 19796 : pq_putemptymessage(PqMsg_BindComplete);
2047 :
2048 : /*
2049 : * Emit duration logging if appropriate.
2050 : */
2051 19796 : switch (check_log_duration(msec_str, false))
2052 : {
2053 0 : case 1:
2054 0 : ereport(LOG,
2055 : (errmsg("duration: %s ms", msec_str),
2056 : errhidestmt(true)));
2057 0 : break;
2058 24 : case 2:
2059 24 : ereport(LOG,
2060 : (errmsg("duration: %s ms bind %s%s%s: %s",
2061 : msec_str,
2062 : *stmt_name ? stmt_name : "<unnamed>",
2063 : *portal_name ? "/" : "",
2064 : *portal_name ? portal_name : "",
2065 : psrc->query_string),
2066 : errhidestmt(true),
2067 : errdetail_params(params)));
2068 24 : break;
2069 : }
2070 :
2071 19796 : if (save_log_statement_stats)
2072 0 : ShowUsage("BIND MESSAGE STATISTICS");
2073 :
2074 : valgrind_report_error_query(debug_query_string);
2075 :
2076 19796 : debug_query_string = NULL;
2077 19796 : }
2078 :
2079 : /*
2080 : * exec_execute_message
2081 : *
2082 : * Process an "Execute" message for a portal
2083 : */
2084 : static void
2085 19796 : exec_execute_message(const char *portal_name, long max_rows)
2086 : {
2087 : CommandDest dest;
2088 : DestReceiver *receiver;
2089 : Portal portal;
2090 : bool completed;
2091 : QueryCompletion qc;
2092 : const char *sourceText;
2093 : const char *prepStmtName;
2094 : ParamListInfo portalParams;
2095 19796 : bool save_log_statement_stats = log_statement_stats;
2096 : bool is_xact_command;
2097 : bool execute_is_fetch;
2098 19796 : bool was_logged = false;
2099 : char msec_str[32];
2100 : ParamsErrorCbData params_data;
2101 : ErrorContextCallback params_errcxt;
2102 : const char *cmdtagname;
2103 : size_t cmdtaglen;
2104 :
2105 : /* Adjust destination to tell printtup.c what to do */
2106 19796 : dest = whereToSendOutput;
2107 19796 : if (dest == DestRemote)
2108 19796 : dest = DestRemoteExecute;
2109 :
2110 19796 : portal = GetPortalByName(portal_name);
2111 19796 : if (!PortalIsValid(portal))
2112 0 : ereport(ERROR,
2113 : (errcode(ERRCODE_UNDEFINED_CURSOR),
2114 : errmsg("portal \"%s\" does not exist", portal_name)));
2115 :
2116 : /*
2117 : * If the original query was a null string, just return
2118 : * EmptyQueryResponse.
2119 : */
2120 19796 : if (portal->commandTag == CMDTAG_UNKNOWN)
2121 : {
2122 : Assert(portal->stmts == NIL);
2123 0 : NullCommand(dest);
2124 0 : return;
2125 : }
2126 :
2127 : /* Does the portal contain a transaction command? */
2128 19796 : is_xact_command = IsTransactionStmtList(portal->stmts);
2129 :
2130 : /*
2131 : * We must copy the sourceText and prepStmtName into MessageContext in
2132 : * case the portal is destroyed during finish_xact_command. We do not
2133 : * make a copy of the portalParams though, preferring to just not print
2134 : * them in that case.
2135 : */
2136 19796 : sourceText = pstrdup(portal->sourceText);
2137 19796 : if (portal->prepStmtName)
2138 14070 : prepStmtName = pstrdup(portal->prepStmtName);
2139 : else
2140 5726 : prepStmtName = "<unnamed>";
2141 19796 : portalParams = portal->portalParams;
2142 :
2143 : /*
2144 : * Report query to various monitoring facilities.
2145 : */
2146 19796 : debug_query_string = sourceText;
2147 :
2148 19796 : pgstat_report_activity(STATE_RUNNING, sourceText);
2149 :
2150 19796 : cmdtagname = GetCommandTagNameAndLen(portal->commandTag, &cmdtaglen);
2151 :
2152 19796 : set_ps_display_with_len(cmdtagname, cmdtaglen);
2153 :
2154 19796 : if (save_log_statement_stats)
2155 0 : ResetUsage();
2156 :
2157 19796 : BeginCommand(portal->commandTag, dest);
2158 :
2159 : /*
2160 : * Create dest receiver in MessageContext (we don't want it in transaction
2161 : * context, because that may get deleted if portal contains VACUUM).
2162 : */
2163 19796 : receiver = CreateDestReceiver(dest);
2164 19796 : if (dest == DestRemoteExecute)
2165 19796 : SetRemoteDestReceiverParams(receiver, portal);
2166 :
2167 : /*
2168 : * Ensure we are in a transaction command (this should normally be the
2169 : * case already due to prior BIND).
2170 : */
2171 19796 : start_xact_command();
2172 :
2173 : /*
2174 : * If we re-issue an Execute protocol request against an existing portal,
2175 : * then we are only fetching more rows rather than completely re-executing
2176 : * the query from the start. atStart is never reset for a v3 portal, so we
2177 : * are safe to use this check.
2178 : */
2179 19796 : execute_is_fetch = !portal->atStart;
2180 :
2181 : /* Log immediately if dictated by log_statement */
2182 19796 : if (check_log_statement(portal->stmts))
2183 : {
2184 6906 : ereport(LOG,
2185 : (errmsg("%s %s%s%s: %s",
2186 : execute_is_fetch ?
2187 : _("execute fetch from") :
2188 : _("execute"),
2189 : prepStmtName,
2190 : *portal_name ? "/" : "",
2191 : *portal_name ? portal_name : "",
2192 : sourceText),
2193 : errhidestmt(true),
2194 : errdetail_params(portalParams)));
2195 6906 : was_logged = true;
2196 : }
2197 :
2198 : /*
2199 : * If we are in aborted transaction state, the only portals we can
2200 : * actually run are those containing COMMIT or ROLLBACK commands.
2201 : */
2202 19796 : if (IsAbortedTransactionBlockState() &&
2203 2 : !IsTransactionExitStmtList(portal->stmts))
2204 0 : ereport(ERROR,
2205 : (errcode(ERRCODE_IN_FAILED_SQL_TRANSACTION),
2206 : errmsg("current transaction is aborted, "
2207 : "commands ignored until end of transaction block"),
2208 : errdetail_abort()));
2209 :
2210 : /* Check for cancel signal before we start execution */
2211 19796 : CHECK_FOR_INTERRUPTS();
2212 :
2213 : /*
2214 : * Okay to run the portal. Set the error callback so that parameters are
2215 : * logged. The parameters must have been saved during the bind phase.
2216 : */
2217 19796 : params_data.portalName = portal->name;
2218 19796 : params_data.params = portalParams;
2219 19796 : params_errcxt.previous = error_context_stack;
2220 19796 : params_errcxt.callback = ParamsErrorCallback;
2221 19796 : params_errcxt.arg = (void *) ¶ms_data;
2222 19796 : error_context_stack = ¶ms_errcxt;
2223 :
2224 19796 : if (max_rows <= 0)
2225 19796 : max_rows = FETCH_ALL;
2226 :
2227 19796 : completed = PortalRun(portal,
2228 : max_rows,
2229 : true, /* always top level */
2230 19796 : !execute_is_fetch && max_rows == FETCH_ALL,
2231 : receiver,
2232 : receiver,
2233 : &qc);
2234 :
2235 19752 : receiver->rDestroy(receiver);
2236 :
2237 : /* Done executing; remove the params error callback */
2238 19752 : error_context_stack = error_context_stack->previous;
2239 :
2240 19752 : if (completed)
2241 : {
2242 19752 : if (is_xact_command || (MyXactFlags & XACT_FLAGS_NEEDIMMEDIATECOMMIT))
2243 : {
2244 : /*
2245 : * If this was a transaction control statement, commit it. We
2246 : * will start a new xact command for the next command (if any).
2247 : * Likewise if the statement required immediate commit. Without
2248 : * this provision, we wouldn't force commit until Sync is
2249 : * received, which creates a hazard if the client tries to
2250 : * pipeline immediate-commit statements.
2251 : */
2252 896 : finish_xact_command();
2253 :
2254 : /*
2255 : * These commands typically don't have any parameters, and even if
2256 : * one did we couldn't print them now because the storage went
2257 : * away during finish_xact_command. So pretend there were none.
2258 : */
2259 896 : portalParams = NULL;
2260 : }
2261 : else
2262 : {
2263 : /*
2264 : * We need a CommandCounterIncrement after every query, except
2265 : * those that start or end a transaction block.
2266 : */
2267 18856 : CommandCounterIncrement();
2268 :
2269 : /*
2270 : * Set XACT_FLAGS_PIPELINING whenever we complete an Execute
2271 : * message without immediately committing the transaction.
2272 : */
2273 18856 : MyXactFlags |= XACT_FLAGS_PIPELINING;
2274 :
2275 : /*
2276 : * Disable statement timeout whenever we complete an Execute
2277 : * message. The next protocol message will start a fresh timeout.
2278 : */
2279 18856 : disable_statement_timeout();
2280 : }
2281 :
2282 : /* Send appropriate CommandComplete to client */
2283 19752 : EndCommand(&qc, dest, false);
2284 : }
2285 : else
2286 : {
2287 : /* Portal run not complete, so send PortalSuspended */
2288 0 : if (whereToSendOutput == DestRemote)
2289 0 : pq_putemptymessage(PqMsg_PortalSuspended);
2290 :
2291 : /*
2292 : * Set XACT_FLAGS_PIPELINING whenever we suspend an Execute message,
2293 : * too.
2294 : */
2295 0 : MyXactFlags |= XACT_FLAGS_PIPELINING;
2296 : }
2297 :
2298 : /*
2299 : * Emit duration logging if appropriate.
2300 : */
2301 19752 : switch (check_log_duration(msec_str, was_logged))
2302 : {
2303 16 : case 1:
2304 16 : ereport(LOG,
2305 : (errmsg("duration: %s ms", msec_str),
2306 : errhidestmt(true)));
2307 16 : break;
2308 0 : case 2:
2309 0 : ereport(LOG,
2310 : (errmsg("duration: %s ms %s %s%s%s: %s",
2311 : msec_str,
2312 : execute_is_fetch ?
2313 : _("execute fetch from") :
2314 : _("execute"),
2315 : prepStmtName,
2316 : *portal_name ? "/" : "",
2317 : *portal_name ? portal_name : "",
2318 : sourceText),
2319 : errhidestmt(true),
2320 : errdetail_params(portalParams)));
2321 0 : break;
2322 : }
2323 :
2324 19752 : if (save_log_statement_stats)
2325 0 : ShowUsage("EXECUTE MESSAGE STATISTICS");
2326 :
2327 : valgrind_report_error_query(debug_query_string);
2328 :
2329 19752 : debug_query_string = NULL;
2330 : }
2331 :
2332 : /*
2333 : * check_log_statement
2334 : * Determine whether command should be logged because of log_statement
2335 : *
2336 : * stmt_list can be either raw grammar output or a list of planned
2337 : * statements
2338 : */
2339 : static bool
2340 592758 : check_log_statement(List *stmt_list)
2341 : {
2342 : ListCell *stmt_item;
2343 :
2344 592758 : if (log_statement == LOGSTMT_NONE)
2345 251052 : return false;
2346 341706 : if (log_statement == LOGSTMT_ALL)
2347 341706 : return true;
2348 :
2349 : /* Else we have to inspect the statement(s) to see whether to log */
2350 0 : foreach(stmt_item, stmt_list)
2351 : {
2352 0 : Node *stmt = (Node *) lfirst(stmt_item);
2353 :
2354 0 : if (GetCommandLogLevel(stmt) <= log_statement)
2355 0 : return true;
2356 : }
2357 :
2358 0 : return false;
2359 : }
2360 :
2361 : /*
2362 : * check_log_duration
2363 : * Determine whether current command's duration should be logged
2364 : * We also check if this statement in this transaction must be logged
2365 : * (regardless of its duration).
2366 : *
2367 : * Returns:
2368 : * 0 if no logging is needed
2369 : * 1 if just the duration should be logged
2370 : * 2 if duration and query details should be logged
2371 : *
2372 : * If logging is needed, the duration in msec is formatted into msec_str[],
2373 : * which must be a 32-byte buffer.
2374 : *
2375 : * was_logged should be true if caller already logged query details (this
2376 : * essentially prevents 2 from being returned).
2377 : */
2378 : int
2379 586380 : check_log_duration(char *msec_str, bool was_logged)
2380 : {
2381 586380 : if (log_duration || log_min_duration_sample >= 0 ||
2382 586380 : log_min_duration_statement >= 0 || xact_is_sampled)
2383 : {
2384 : long secs;
2385 : int usecs;
2386 : int msecs;
2387 : bool exceeded_duration;
2388 : bool exceeded_sample_duration;
2389 84 : bool in_sample = false;
2390 :
2391 84 : TimestampDifference(GetCurrentStatementStartTimestamp(),
2392 : GetCurrentTimestamp(),
2393 : &secs, &usecs);
2394 84 : msecs = usecs / 1000;
2395 :
2396 : /*
2397 : * This odd-looking test for log_min_duration_* being exceeded is
2398 : * designed to avoid integer overflow with very long durations: don't
2399 : * compute secs * 1000 until we've verified it will fit in int.
2400 : */
2401 84 : exceeded_duration = (log_min_duration_statement == 0 ||
2402 0 : (log_min_duration_statement > 0 &&
2403 0 : (secs > log_min_duration_statement / 1000 ||
2404 0 : secs * 1000 + msecs >= log_min_duration_statement)));
2405 :
2406 168 : exceeded_sample_duration = (log_min_duration_sample == 0 ||
2407 84 : (log_min_duration_sample > 0 &&
2408 0 : (secs > log_min_duration_sample / 1000 ||
2409 0 : secs * 1000 + msecs >= log_min_duration_sample)));
2410 :
2411 : /*
2412 : * Do not log if log_statement_sample_rate = 0. Log a sample if
2413 : * log_statement_sample_rate <= 1 and avoid unnecessary PRNG call if
2414 : * log_statement_sample_rate = 1.
2415 : */
2416 84 : if (exceeded_sample_duration)
2417 0 : in_sample = log_statement_sample_rate != 0 &&
2418 0 : (log_statement_sample_rate == 1 ||
2419 0 : pg_prng_double(&pg_global_prng_state) <= log_statement_sample_rate);
2420 :
2421 84 : if (exceeded_duration || in_sample || log_duration || xact_is_sampled)
2422 : {
2423 84 : snprintf(msec_str, 32, "%ld.%03d",
2424 84 : secs * 1000 + msecs, usecs % 1000);
2425 84 : if ((exceeded_duration || in_sample || xact_is_sampled) && !was_logged)
2426 84 : return 2;
2427 : else
2428 34 : return 1;
2429 : }
2430 : }
2431 :
2432 586296 : return 0;
2433 : }
2434 :
2435 : /*
2436 : * errdetail_execute
2437 : *
2438 : * Add an errdetail() line showing the query referenced by an EXECUTE, if any.
2439 : * The argument is the raw parsetree list.
2440 : */
2441 : static int
2442 334800 : errdetail_execute(List *raw_parsetree_list)
2443 : {
2444 : ListCell *parsetree_item;
2445 :
2446 671906 : foreach(parsetree_item, raw_parsetree_list)
2447 : {
2448 347948 : RawStmt *parsetree = lfirst_node(RawStmt, parsetree_item);
2449 :
2450 347948 : if (IsA(parsetree->stmt, ExecuteStmt))
2451 : {
2452 10842 : ExecuteStmt *stmt = (ExecuteStmt *) parsetree->stmt;
2453 : PreparedStatement *pstmt;
2454 :
2455 10842 : pstmt = FetchPreparedStatement(stmt->name, false);
2456 10842 : if (pstmt)
2457 : {
2458 10842 : errdetail("prepare: %s", pstmt->plansource->query_string);
2459 10842 : return 0;
2460 : }
2461 : }
2462 : }
2463 :
2464 323958 : return 0;
2465 : }
2466 :
2467 : /*
2468 : * errdetail_params
2469 : *
2470 : * Add an errdetail() line showing bind-parameter data, if available.
2471 : * Note that this is only used for statement logging, so it is controlled
2472 : * by log_parameter_max_length not log_parameter_max_length_on_error.
2473 : */
2474 : static int
2475 6930 : errdetail_params(ParamListInfo params)
2476 : {
2477 6930 : if (params && params->numParams > 0 && log_parameter_max_length != 0)
2478 : {
2479 : char *str;
2480 :
2481 4600 : str = BuildParamLogString(params, NULL, log_parameter_max_length);
2482 4600 : if (str && str[0] != '\0')
2483 4600 : errdetail("Parameters: %s", str);
2484 : }
2485 :
2486 6930 : return 0;
2487 : }
2488 :
2489 : /*
2490 : * errdetail_abort
2491 : *
2492 : * Add an errdetail() line showing abort reason, if any.
2493 : */
2494 : static int
2495 98 : errdetail_abort(void)
2496 : {
2497 98 : if (MyProc->recoveryConflictPending)
2498 0 : errdetail("Abort reason: recovery conflict");
2499 :
2500 98 : return 0;
2501 : }
2502 :
2503 : /*
2504 : * errdetail_recovery_conflict
2505 : *
2506 : * Add an errdetail() line showing conflict source.
2507 : */
2508 : static int
2509 24 : errdetail_recovery_conflict(ProcSignalReason reason)
2510 : {
2511 24 : switch (reason)
2512 : {
2513 2 : case PROCSIG_RECOVERY_CONFLICT_BUFFERPIN:
2514 2 : errdetail("User was holding shared buffer pin for too long.");
2515 2 : break;
2516 2 : case PROCSIG_RECOVERY_CONFLICT_LOCK:
2517 2 : errdetail("User was holding a relation lock for too long.");
2518 2 : break;
2519 2 : case PROCSIG_RECOVERY_CONFLICT_TABLESPACE:
2520 2 : errdetail("User was or might have been using tablespace that must be dropped.");
2521 2 : break;
2522 2 : case PROCSIG_RECOVERY_CONFLICT_SNAPSHOT:
2523 2 : errdetail("User query might have needed to see row versions that must be removed.");
2524 2 : break;
2525 10 : case PROCSIG_RECOVERY_CONFLICT_LOGICALSLOT:
2526 10 : errdetail("User was using a logical replication slot that must be invalidated.");
2527 10 : break;
2528 2 : case PROCSIG_RECOVERY_CONFLICT_STARTUP_DEADLOCK:
2529 2 : errdetail("User transaction caused buffer deadlock with recovery.");
2530 2 : break;
2531 4 : case PROCSIG_RECOVERY_CONFLICT_DATABASE:
2532 4 : errdetail("User was connected to a database that must be dropped.");
2533 4 : break;
2534 0 : default:
2535 0 : break;
2536 : /* no errdetail */
2537 : }
2538 :
2539 24 : return 0;
2540 : }
2541 :
2542 : /*
2543 : * bind_param_error_callback
2544 : *
2545 : * Error context callback used while parsing parameters in a Bind message
2546 : */
2547 : static void
2548 2 : bind_param_error_callback(void *arg)
2549 : {
2550 2 : BindParamCbData *data = (BindParamCbData *) arg;
2551 : StringInfoData buf;
2552 : char *quotedval;
2553 :
2554 2 : if (data->paramno < 0)
2555 0 : return;
2556 :
2557 : /* If we have a textual value, quote it, and trim if necessary */
2558 2 : if (data->paramval)
2559 : {
2560 2 : initStringInfo(&buf);
2561 2 : appendStringInfoStringQuoted(&buf, data->paramval,
2562 : log_parameter_max_length_on_error);
2563 2 : quotedval = buf.data;
2564 : }
2565 : else
2566 0 : quotedval = NULL;
2567 :
2568 2 : if (data->portalName && data->portalName[0] != '\0')
2569 : {
2570 0 : if (quotedval)
2571 0 : errcontext("portal \"%s\" parameter $%d = %s",
2572 0 : data->portalName, data->paramno + 1, quotedval);
2573 : else
2574 0 : errcontext("portal \"%s\" parameter $%d",
2575 0 : data->portalName, data->paramno + 1);
2576 : }
2577 : else
2578 : {
2579 2 : if (quotedval)
2580 2 : errcontext("unnamed portal parameter $%d = %s",
2581 2 : data->paramno + 1, quotedval);
2582 : else
2583 0 : errcontext("unnamed portal parameter $%d",
2584 0 : data->paramno + 1);
2585 : }
2586 :
2587 2 : if (quotedval)
2588 2 : pfree(quotedval);
2589 : }
2590 :
2591 : /*
2592 : * exec_describe_statement_message
2593 : *
2594 : * Process a "Describe" message for a prepared statement
2595 : */
2596 : static void
2597 142 : exec_describe_statement_message(const char *stmt_name)
2598 : {
2599 : CachedPlanSource *psrc;
2600 :
2601 : /*
2602 : * Start up a transaction command. (Note that this will normally change
2603 : * current memory context.) Nothing happens if we are already in one.
2604 : */
2605 142 : start_xact_command();
2606 :
2607 : /* Switch back to message context */
2608 142 : MemoryContextSwitchTo(MessageContext);
2609 :
2610 : /* Find prepared statement */
2611 142 : if (stmt_name[0] != '\0')
2612 : {
2613 : PreparedStatement *pstmt;
2614 :
2615 88 : pstmt = FetchPreparedStatement(stmt_name, true);
2616 86 : psrc = pstmt->plansource;
2617 : }
2618 : else
2619 : {
2620 : /* special-case the unnamed statement */
2621 54 : psrc = unnamed_stmt_psrc;
2622 54 : if (!psrc)
2623 0 : ereport(ERROR,
2624 : (errcode(ERRCODE_UNDEFINED_PSTATEMENT),
2625 : errmsg("unnamed prepared statement does not exist")));
2626 : }
2627 :
2628 : /* Prepared statements shouldn't have changeable result descs */
2629 : Assert(psrc->fixed_result);
2630 :
2631 : /*
2632 : * If we are in aborted transaction state, we can't run
2633 : * SendRowDescriptionMessage(), because that needs catalog accesses.
2634 : * Hence, refuse to Describe statements that return data. (We shouldn't
2635 : * just refuse all Describes, since that might break the ability of some
2636 : * clients to issue COMMIT or ROLLBACK commands, if they use code that
2637 : * blindly Describes whatever it does.) We can Describe parameters
2638 : * without doing anything dangerous, so we don't restrict that.
2639 : */
2640 140 : if (IsAbortedTransactionBlockState() &&
2641 6 : psrc->resultDesc)
2642 0 : ereport(ERROR,
2643 : (errcode(ERRCODE_IN_FAILED_SQL_TRANSACTION),
2644 : errmsg("current transaction is aborted, "
2645 : "commands ignored until end of transaction block"),
2646 : errdetail_abort()));
2647 :
2648 140 : if (whereToSendOutput != DestRemote)
2649 0 : return; /* can't actually do anything... */
2650 :
2651 : /*
2652 : * First describe the parameters...
2653 : */
2654 140 : pq_beginmessage_reuse(&row_description_buf, 't'); /* parameter description
2655 : * message type */
2656 140 : pq_sendint16(&row_description_buf, psrc->num_params);
2657 :
2658 154 : for (int i = 0; i < psrc->num_params; i++)
2659 : {
2660 14 : Oid ptype = psrc->param_types[i];
2661 :
2662 14 : pq_sendint32(&row_description_buf, (int) ptype);
2663 : }
2664 140 : pq_endmessage_reuse(&row_description_buf);
2665 :
2666 : /*
2667 : * Next send RowDescription or NoData to describe the result...
2668 : */
2669 140 : if (psrc->resultDesc)
2670 : {
2671 : List *tlist;
2672 :
2673 : /* Get the plan's primary targetlist */
2674 128 : tlist = CachedPlanGetTargetList(psrc, NULL);
2675 :
2676 128 : SendRowDescriptionMessage(&row_description_buf,
2677 : psrc->resultDesc,
2678 : tlist,
2679 : NULL);
2680 : }
2681 : else
2682 12 : pq_putemptymessage(PqMsg_NoData);
2683 : }
2684 :
2685 : /*
2686 : * exec_describe_portal_message
2687 : *
2688 : * Process a "Describe" message for a portal
2689 : */
2690 : static void
2691 19800 : exec_describe_portal_message(const char *portal_name)
2692 : {
2693 : Portal portal;
2694 :
2695 : /*
2696 : * Start up a transaction command. (Note that this will normally change
2697 : * current memory context.) Nothing happens if we are already in one.
2698 : */
2699 19800 : start_xact_command();
2700 :
2701 : /* Switch back to message context */
2702 19800 : MemoryContextSwitchTo(MessageContext);
2703 :
2704 19800 : portal = GetPortalByName(portal_name);
2705 19800 : if (!PortalIsValid(portal))
2706 2 : ereport(ERROR,
2707 : (errcode(ERRCODE_UNDEFINED_CURSOR),
2708 : errmsg("portal \"%s\" does not exist", portal_name)));
2709 :
2710 : /*
2711 : * If we are in aborted transaction state, we can't run
2712 : * SendRowDescriptionMessage(), because that needs catalog accesses.
2713 : * Hence, refuse to Describe portals that return data. (We shouldn't just
2714 : * refuse all Describes, since that might break the ability of some
2715 : * clients to issue COMMIT or ROLLBACK commands, if they use code that
2716 : * blindly Describes whatever it does.)
2717 : */
2718 19798 : if (IsAbortedTransactionBlockState() &&
2719 2 : portal->tupDesc)
2720 0 : ereport(ERROR,
2721 : (errcode(ERRCODE_IN_FAILED_SQL_TRANSACTION),
2722 : errmsg("current transaction is aborted, "
2723 : "commands ignored until end of transaction block"),
2724 : errdetail_abort()));
2725 :
2726 19798 : if (whereToSendOutput != DestRemote)
2727 0 : return; /* can't actually do anything... */
2728 :
2729 19798 : if (portal->tupDesc)
2730 7952 : SendRowDescriptionMessage(&row_description_buf,
2731 : portal->tupDesc,
2732 : FetchPortalTargetList(portal),
2733 : portal->formats);
2734 : else
2735 11846 : pq_putemptymessage(PqMsg_NoData);
2736 : }
2737 :
2738 :
2739 : /*
2740 : * Convenience routines for starting/committing a single command.
2741 : */
2742 : static void
2743 1257302 : start_xact_command(void)
2744 : {
2745 1257302 : if (!xact_started)
2746 : {
2747 598340 : StartTransactionCommand();
2748 :
2749 598340 : xact_started = true;
2750 : }
2751 :
2752 : /*
2753 : * Start statement timeout if necessary. Note that this'll intentionally
2754 : * not reset the clock on an already started timeout, to avoid the timing
2755 : * overhead when start_xact_command() is invoked repeatedly, without an
2756 : * interceding finish_xact_command() (e.g. parse/bind/execute). If that's
2757 : * not desired, the timeout has to be disabled explicitly.
2758 : */
2759 1257302 : enable_statement_timeout();
2760 :
2761 : /* Start timeout for checking if the client has gone away if necessary. */
2762 1257302 : if (client_connection_check_interval > 0 &&
2763 0 : IsUnderPostmaster &&
2764 0 : MyProcPort &&
2765 0 : !get_timeout_active(CLIENT_CONNECTION_CHECK_TIMEOUT))
2766 0 : enable_timeout_after(CLIENT_CONNECTION_CHECK_TIMEOUT,
2767 : client_connection_check_interval);
2768 1257302 : }
2769 :
2770 : static void
2771 1094684 : finish_xact_command(void)
2772 : {
2773 : /* cancel active statement timeout after each command */
2774 1094684 : disable_statement_timeout();
2775 :
2776 1094684 : if (xact_started)
2777 : {
2778 559472 : CommitTransactionCommand();
2779 :
2780 : #ifdef MEMORY_CONTEXT_CHECKING
2781 : /* Check all memory contexts that weren't freed during commit */
2782 : /* (those that were, were checked before being deleted) */
2783 : MemoryContextCheck(TopMemoryContext);
2784 : #endif
2785 :
2786 : #ifdef SHOW_MEMORY_STATS
2787 : /* Print mem stats after each commit for leak tracking */
2788 : MemoryContextStats(TopMemoryContext);
2789 : #endif
2790 :
2791 558926 : xact_started = false;
2792 : }
2793 1094138 : }
2794 :
2795 :
2796 : /*
2797 : * Convenience routines for checking whether a statement is one of the
2798 : * ones that we allow in transaction-aborted state.
2799 : */
2800 :
2801 : /* Test a bare parsetree */
2802 : static bool
2803 1680 : IsTransactionExitStmt(Node *parsetree)
2804 : {
2805 1680 : if (parsetree && IsA(parsetree, TransactionStmt))
2806 : {
2807 1594 : TransactionStmt *stmt = (TransactionStmt *) parsetree;
2808 :
2809 1594 : if (stmt->kind == TRANS_STMT_COMMIT ||
2810 856 : stmt->kind == TRANS_STMT_PREPARE ||
2811 852 : stmt->kind == TRANS_STMT_ROLLBACK ||
2812 210 : stmt->kind == TRANS_STMT_ROLLBACK_TO)
2813 1582 : return true;
2814 : }
2815 98 : return false;
2816 : }
2817 :
2818 : /* Test a list that contains PlannedStmt nodes */
2819 : static bool
2820 2 : IsTransactionExitStmtList(List *pstmts)
2821 : {
2822 2 : if (list_length(pstmts) == 1)
2823 : {
2824 2 : PlannedStmt *pstmt = linitial_node(PlannedStmt, pstmts);
2825 :
2826 4 : if (pstmt->commandType == CMD_UTILITY &&
2827 2 : IsTransactionExitStmt(pstmt->utilityStmt))
2828 2 : return true;
2829 : }
2830 0 : return false;
2831 : }
2832 :
2833 : /* Test a list that contains PlannedStmt nodes */
2834 : static bool
2835 19796 : IsTransactionStmtList(List *pstmts)
2836 : {
2837 19796 : if (list_length(pstmts) == 1)
2838 : {
2839 19796 : PlannedStmt *pstmt = linitial_node(PlannedStmt, pstmts);
2840 :
2841 19796 : if (pstmt->commandType == CMD_UTILITY &&
2842 3018 : IsA(pstmt->utilityStmt, TransactionStmt))
2843 896 : return true;
2844 : }
2845 18900 : return false;
2846 : }
2847 :
2848 : /* Release any existing unnamed prepared statement */
2849 : static void
2850 579852 : drop_unnamed_stmt(void)
2851 : {
2852 : /* paranoia to avoid a dangling pointer in case of error */
2853 579852 : if (unnamed_stmt_psrc)
2854 : {
2855 5552 : CachedPlanSource *psrc = unnamed_stmt_psrc;
2856 :
2857 5552 : unnamed_stmt_psrc = NULL;
2858 5552 : DropCachedPlan(psrc);
2859 : }
2860 579852 : }
2861 :
2862 :
2863 : /* --------------------------------
2864 : * signal handler routines used in PostgresMain()
2865 : * --------------------------------
2866 : */
2867 :
2868 : /*
2869 : * quickdie() occurs when signaled SIGQUIT by the postmaster.
2870 : *
2871 : * Either some backend has bought the farm, or we've been told to shut down
2872 : * "immediately"; so we need to stop what we're doing and exit.
2873 : */
2874 : void
2875 0 : quickdie(SIGNAL_ARGS)
2876 : {
2877 0 : sigaddset(&BlockSig, SIGQUIT); /* prevent nested calls */
2878 0 : sigprocmask(SIG_SETMASK, &BlockSig, NULL);
2879 :
2880 : /*
2881 : * Prevent interrupts while exiting; though we just blocked signals that
2882 : * would queue new interrupts, one may have been pending. We don't want a
2883 : * quickdie() downgraded to a mere query cancel.
2884 : */
2885 0 : HOLD_INTERRUPTS();
2886 :
2887 : /*
2888 : * If we're aborting out of client auth, don't risk trying to send
2889 : * anything to the client; we will likely violate the protocol, not to
2890 : * mention that we may have interrupted the guts of OpenSSL or some
2891 : * authentication library.
2892 : */
2893 0 : if (ClientAuthInProgress && whereToSendOutput == DestRemote)
2894 0 : whereToSendOutput = DestNone;
2895 :
2896 : /*
2897 : * Notify the client before exiting, to give a clue on what happened.
2898 : *
2899 : * It's dubious to call ereport() from a signal handler. It is certainly
2900 : * not async-signal safe. But it seems better to try, than to disconnect
2901 : * abruptly and leave the client wondering what happened. It's remotely
2902 : * possible that we crash or hang while trying to send the message, but
2903 : * receiving a SIGQUIT is a sign that something has already gone badly
2904 : * wrong, so there's not much to lose. Assuming the postmaster is still
2905 : * running, it will SIGKILL us soon if we get stuck for some reason.
2906 : *
2907 : * One thing we can do to make this a tad safer is to clear the error
2908 : * context stack, so that context callbacks are not called. That's a lot
2909 : * less code that could be reached here, and the context info is unlikely
2910 : * to be very relevant to a SIGQUIT report anyway.
2911 : */
2912 0 : error_context_stack = NULL;
2913 :
2914 : /*
2915 : * When responding to a postmaster-issued signal, we send the message only
2916 : * to the client; sending to the server log just creates log spam, plus
2917 : * it's more code that we need to hope will work in a signal handler.
2918 : *
2919 : * Ideally these should be ereport(FATAL), but then we'd not get control
2920 : * back to force the correct type of process exit.
2921 : */
2922 0 : switch (GetQuitSignalReason())
2923 : {
2924 0 : case PMQUIT_NOT_SENT:
2925 : /* Hmm, SIGQUIT arrived out of the blue */
2926 0 : ereport(WARNING,
2927 : (errcode(ERRCODE_ADMIN_SHUTDOWN),
2928 : errmsg("terminating connection because of unexpected SIGQUIT signal")));
2929 0 : break;
2930 0 : case PMQUIT_FOR_CRASH:
2931 : /* A crash-and-restart cycle is in progress */
2932 0 : ereport(WARNING_CLIENT_ONLY,
2933 : (errcode(ERRCODE_CRASH_SHUTDOWN),
2934 : errmsg("terminating connection because of crash of another server process"),
2935 : errdetail("The postmaster has commanded this server process to roll back"
2936 : " the current transaction and exit, because another"
2937 : " server process exited abnormally and possibly corrupted"
2938 : " shared memory."),
2939 : errhint("In a moment you should be able to reconnect to the"
2940 : " database and repeat your command.")));
2941 0 : break;
2942 0 : case PMQUIT_FOR_STOP:
2943 : /* Immediate-mode stop */
2944 0 : ereport(WARNING_CLIENT_ONLY,
2945 : (errcode(ERRCODE_ADMIN_SHUTDOWN),
2946 : errmsg("terminating connection due to immediate shutdown command")));
2947 0 : break;
2948 : }
2949 :
2950 : /*
2951 : * We DO NOT want to run proc_exit() or atexit() callbacks -- we're here
2952 : * because shared memory may be corrupted, so we don't want to try to
2953 : * clean up our transaction. Just nail the windows shut and get out of
2954 : * town. The callbacks wouldn't be safe to run from a signal handler,
2955 : * anyway.
2956 : *
2957 : * Note we do _exit(2) not _exit(0). This is to force the postmaster into
2958 : * a system reset cycle if someone sends a manual SIGQUIT to a random
2959 : * backend. This is necessary precisely because we don't clean up our
2960 : * shared memory state. (The "dead man switch" mechanism in pmsignal.c
2961 : * should ensure the postmaster sees this as a crash, too, but no harm in
2962 : * being doubly sure.)
2963 : */
2964 0 : _exit(2);
2965 : }
2966 :
2967 : /*
2968 : * Shutdown signal from postmaster: abort transaction and exit
2969 : * at soonest convenient time
2970 : */
2971 : void
2972 1264 : die(SIGNAL_ARGS)
2973 : {
2974 : /* Don't joggle the elbow of proc_exit */
2975 1264 : if (!proc_exit_inprogress)
2976 : {
2977 880 : InterruptPending = true;
2978 880 : ProcDiePending = true;
2979 : }
2980 :
2981 : /* for the cumulative stats system */
2982 1264 : pgStatSessionEndCause = DISCONNECT_KILLED;
2983 :
2984 : /* If we're still here, waken anything waiting on the process latch */
2985 1264 : SetLatch(MyLatch);
2986 :
2987 : /*
2988 : * If we're in single user mode, we want to quit immediately - we can't
2989 : * rely on latches as they wouldn't work when stdin/stdout is a file.
2990 : * Rather ugly, but it's unlikely to be worthwhile to invest much more
2991 : * effort just for the benefit of single user mode.
2992 : */
2993 1264 : if (DoingCommandRead && whereToSendOutput != DestRemote)
2994 0 : ProcessInterrupts();
2995 1264 : }
2996 :
2997 : /*
2998 : * Query-cancel signal from postmaster: abort current transaction
2999 : * at soonest convenient time
3000 : */
3001 : void
3002 130 : StatementCancelHandler(SIGNAL_ARGS)
3003 : {
3004 : /*
3005 : * Don't joggle the elbow of proc_exit
3006 : */
3007 130 : if (!proc_exit_inprogress)
3008 : {
3009 130 : InterruptPending = true;
3010 130 : QueryCancelPending = true;
3011 : }
3012 :
3013 : /* If we're still here, waken anything waiting on the process latch */
3014 130 : SetLatch(MyLatch);
3015 130 : }
3016 :
3017 : /* signal handler for floating point exception */
3018 : void
3019 0 : FloatExceptionHandler(SIGNAL_ARGS)
3020 : {
3021 : /* We're not returning, so no need to save errno */
3022 0 : ereport(ERROR,
3023 : (errcode(ERRCODE_FLOATING_POINT_EXCEPTION),
3024 : errmsg("floating-point exception"),
3025 : errdetail("An invalid floating-point operation was signaled. "
3026 : "This probably means an out-of-range result or an "
3027 : "invalid operation, such as division by zero.")));
3028 : }
3029 :
3030 : /*
3031 : * Tell the next CHECK_FOR_INTERRUPTS() to check for a particular type of
3032 : * recovery conflict. Runs in a SIGUSR1 handler.
3033 : */
3034 : void
3035 38 : HandleRecoveryConflictInterrupt(ProcSignalReason reason)
3036 : {
3037 38 : RecoveryConflictPendingReasons[reason] = true;
3038 38 : RecoveryConflictPending = true;
3039 38 : InterruptPending = true;
3040 : /* latch will be set by procsignal_sigusr1_handler */
3041 38 : }
3042 :
3043 : /*
3044 : * Check one individual conflict reason.
3045 : */
3046 : static void
3047 38 : ProcessRecoveryConflictInterrupt(ProcSignalReason reason)
3048 : {
3049 38 : switch (reason)
3050 : {
3051 16 : case PROCSIG_RECOVERY_CONFLICT_STARTUP_DEADLOCK:
3052 :
3053 : /*
3054 : * If we aren't waiting for a lock we can never deadlock.
3055 : */
3056 16 : if (!IsWaitingForLock())
3057 12 : return;
3058 :
3059 : /* Intentional fall through to check wait for pin */
3060 : /* FALLTHROUGH */
3061 :
3062 : case PROCSIG_RECOVERY_CONFLICT_BUFFERPIN:
3063 :
3064 : /*
3065 : * If PROCSIG_RECOVERY_CONFLICT_BUFFERPIN is requested but we
3066 : * aren't blocking the Startup process there is nothing more to
3067 : * do.
3068 : *
3069 : * When PROCSIG_RECOVERY_CONFLICT_STARTUP_DEADLOCK is requested,
3070 : * if we're waiting for locks and the startup process is not
3071 : * waiting for buffer pin (i.e., also waiting for locks), we set
3072 : * the flag so that ProcSleep() will check for deadlocks.
3073 : */
3074 6 : if (!HoldingBufferPinThatDelaysRecovery())
3075 : {
3076 4 : if (reason == PROCSIG_RECOVERY_CONFLICT_STARTUP_DEADLOCK &&
3077 2 : GetStartupBufferPinWaitBufId() < 0)
3078 2 : CheckDeadLockAlert();
3079 2 : return;
3080 : }
3081 :
3082 4 : MyProc->recoveryConflictPending = true;
3083 :
3084 : /* Intentional fall through to error handling */
3085 : /* FALLTHROUGH */
3086 :
3087 10 : case PROCSIG_RECOVERY_CONFLICT_LOCK:
3088 : case PROCSIG_RECOVERY_CONFLICT_TABLESPACE:
3089 : case PROCSIG_RECOVERY_CONFLICT_SNAPSHOT:
3090 :
3091 : /*
3092 : * If we aren't in a transaction any longer then ignore.
3093 : */
3094 10 : if (!IsTransactionOrTransactionBlock())
3095 0 : return;
3096 :
3097 : /* FALLTHROUGH */
3098 :
3099 : case PROCSIG_RECOVERY_CONFLICT_LOGICALSLOT:
3100 :
3101 : /*
3102 : * If we're not in a subtransaction then we are OK to throw an
3103 : * ERROR to resolve the conflict. Otherwise drop through to the
3104 : * FATAL case.
3105 : *
3106 : * PROCSIG_RECOVERY_CONFLICT_LOGICALSLOT is a special case that
3107 : * always throws an ERROR (ie never promotes to FATAL), though it
3108 : * still has to respect QueryCancelHoldoffCount, so it shares this
3109 : * code path. Logical decoding slots are only acquired while
3110 : * performing logical decoding. During logical decoding no user
3111 : * controlled code is run. During [sub]transaction abort, the
3112 : * slot is released. Therefore user controlled code cannot
3113 : * intercept an error before the replication slot is released.
3114 : *
3115 : * XXX other times that we can throw just an ERROR *may* be
3116 : * PROCSIG_RECOVERY_CONFLICT_LOCK if no locks are held in parent
3117 : * transactions
3118 : *
3119 : * PROCSIG_RECOVERY_CONFLICT_SNAPSHOT if no snapshots are held by
3120 : * parent transactions and the transaction is not
3121 : * transaction-snapshot mode
3122 : *
3123 : * PROCSIG_RECOVERY_CONFLICT_TABLESPACE if no temp files or
3124 : * cursors open in parent transactions
3125 : */
3126 20 : if (reason == PROCSIG_RECOVERY_CONFLICT_LOGICALSLOT ||
3127 10 : !IsSubTransaction())
3128 : {
3129 : /*
3130 : * If we already aborted then we no longer need to cancel. We
3131 : * do this here since we do not wish to ignore aborted
3132 : * subtransactions, which must cause FATAL, currently.
3133 : */
3134 20 : if (IsAbortedTransactionBlockState())
3135 0 : return;
3136 :
3137 : /*
3138 : * If a recovery conflict happens while we are waiting for
3139 : * input from the client, the client is presumably just
3140 : * sitting idle in a transaction, preventing recovery from
3141 : * making progress. We'll drop through to the FATAL case
3142 : * below to dislodge it, in that case.
3143 : */
3144 20 : if (!DoingCommandRead)
3145 : {
3146 : /* Avoid losing sync in the FE/BE protocol. */
3147 12 : if (QueryCancelHoldoffCount != 0)
3148 : {
3149 : /*
3150 : * Re-arm and defer this interrupt until later. See
3151 : * similar code in ProcessInterrupts().
3152 : */
3153 0 : RecoveryConflictPendingReasons[reason] = true;
3154 0 : RecoveryConflictPending = true;
3155 0 : InterruptPending = true;
3156 0 : return;
3157 : }
3158 :
3159 : /*
3160 : * We are cleared to throw an ERROR. Either it's the
3161 : * logical slot case, or we have a top-level transaction
3162 : * that we can abort and a conflict that isn't inherently
3163 : * non-retryable.
3164 : */
3165 12 : LockErrorCleanup();
3166 12 : pgstat_report_recovery_conflict(reason);
3167 12 : ereport(ERROR,
3168 : (errcode(ERRCODE_T_R_SERIALIZATION_FAILURE),
3169 : errmsg("canceling statement due to conflict with recovery"),
3170 : errdetail_recovery_conflict(reason)));
3171 : break;
3172 : }
3173 : }
3174 :
3175 : /* Intentional fall through to session cancel */
3176 : /* FALLTHROUGH */
3177 :
3178 : case PROCSIG_RECOVERY_CONFLICT_DATABASE:
3179 :
3180 : /*
3181 : * Retrying is not possible because the database is dropped, or we
3182 : * decided above that we couldn't resolve the conflict with an
3183 : * ERROR and fell through. Terminate the session.
3184 : */
3185 12 : pgstat_report_recovery_conflict(reason);
3186 12 : ereport(FATAL,
3187 : (errcode(reason == PROCSIG_RECOVERY_CONFLICT_DATABASE ?
3188 : ERRCODE_DATABASE_DROPPED :
3189 : ERRCODE_T_R_SERIALIZATION_FAILURE),
3190 : errmsg("terminating connection due to conflict with recovery"),
3191 : errdetail_recovery_conflict(reason),
3192 : errhint("In a moment you should be able to reconnect to the"
3193 : " database and repeat your command.")));
3194 : break;
3195 :
3196 0 : default:
3197 0 : elog(FATAL, "unrecognized conflict mode: %d", (int) reason);
3198 : }
3199 : }
3200 :
3201 : /*
3202 : * Check each possible recovery conflict reason.
3203 : */
3204 : static void
3205 38 : ProcessRecoveryConflictInterrupts(void)
3206 : {
3207 : /*
3208 : * We don't need to worry about joggling the elbow of proc_exit, because
3209 : * proc_exit_prepare() holds interrupts, so ProcessInterrupts() won't call
3210 : * us.
3211 : */
3212 : Assert(!proc_exit_inprogress);
3213 : Assert(InterruptHoldoffCount == 0);
3214 : Assert(RecoveryConflictPending);
3215 :
3216 38 : RecoveryConflictPending = false;
3217 :
3218 210 : for (ProcSignalReason reason = PROCSIG_RECOVERY_CONFLICT_FIRST;
3219 : reason <= PROCSIG_RECOVERY_CONFLICT_LAST;
3220 172 : reason++)
3221 : {
3222 196 : if (RecoveryConflictPendingReasons[reason])
3223 : {
3224 38 : RecoveryConflictPendingReasons[reason] = false;
3225 38 : ProcessRecoveryConflictInterrupt(reason);
3226 : }
3227 : }
3228 14 : }
3229 :
3230 : /*
3231 : * ProcessInterrupts: out-of-line portion of CHECK_FOR_INTERRUPTS() macro
3232 : *
3233 : * If an interrupt condition is pending, and it's safe to service it,
3234 : * then clear the flag and accept the interrupt. Called only when
3235 : * InterruptPending is true.
3236 : *
3237 : * Note: if INTERRUPTS_CAN_BE_PROCESSED() is true, then ProcessInterrupts
3238 : * is guaranteed to clear the InterruptPending flag before returning.
3239 : * (This is not the same as guaranteeing that it's still clear when we
3240 : * return; another interrupt could have arrived. But we promise that
3241 : * any pre-existing one will have been serviced.)
3242 : */
3243 : void
3244 5894 : ProcessInterrupts(void)
3245 : {
3246 : /* OK to accept any interrupts now? */
3247 5894 : if (InterruptHoldoffCount != 0 || CritSectionCount != 0)
3248 1014 : return;
3249 4880 : InterruptPending = false;
3250 :
3251 4880 : if (ProcDiePending)
3252 : {
3253 880 : ProcDiePending = false;
3254 880 : QueryCancelPending = false; /* ProcDie trumps QueryCancel */
3255 880 : LockErrorCleanup();
3256 : /* As in quickdie, don't risk sending to client during auth */
3257 880 : if (ClientAuthInProgress && whereToSendOutput == DestRemote)
3258 0 : whereToSendOutput = DestNone;
3259 880 : if (ClientAuthInProgress)
3260 0 : ereport(FATAL,
3261 : (errcode(ERRCODE_QUERY_CANCELED),
3262 : errmsg("canceling authentication due to timeout")));
3263 880 : else if (AmAutoVacuumWorkerProcess())
3264 0 : ereport(FATAL,
3265 : (errcode(ERRCODE_ADMIN_SHUTDOWN),
3266 : errmsg("terminating autovacuum process due to administrator command")));
3267 880 : else if (IsLogicalWorker())
3268 164 : ereport(FATAL,
3269 : (errcode(ERRCODE_ADMIN_SHUTDOWN),
3270 : errmsg("terminating logical replication worker due to administrator command")));
3271 716 : else if (IsLogicalLauncher())
3272 : {
3273 678 : ereport(DEBUG1,
3274 : (errmsg_internal("logical replication launcher shutting down")));
3275 :
3276 : /*
3277 : * The logical replication launcher can be stopped at any time.
3278 : * Use exit status 1 so the background worker is restarted.
3279 : */
3280 678 : proc_exit(1);
3281 : }
3282 38 : else if (AmBackgroundWorkerProcess())
3283 2 : ereport(FATAL,
3284 : (errcode(ERRCODE_ADMIN_SHUTDOWN),
3285 : errmsg("terminating background worker \"%s\" due to administrator command",
3286 : MyBgworkerEntry->bgw_type)));
3287 : else
3288 36 : ereport(FATAL,
3289 : (errcode(ERRCODE_ADMIN_SHUTDOWN),
3290 : errmsg("terminating connection due to administrator command")));
3291 : }
3292 :
3293 4000 : if (CheckClientConnectionPending)
3294 : {
3295 0 : CheckClientConnectionPending = false;
3296 :
3297 : /*
3298 : * Check for lost connection and re-arm, if still configured, but not
3299 : * if we've arrived back at DoingCommandRead state. We don't want to
3300 : * wake up idle sessions, and they already know how to detect lost
3301 : * connections.
3302 : */
3303 0 : if (!DoingCommandRead && client_connection_check_interval > 0)
3304 : {
3305 0 : if (!pq_check_connection())
3306 0 : ClientConnectionLost = true;
3307 : else
3308 0 : enable_timeout_after(CLIENT_CONNECTION_CHECK_TIMEOUT,
3309 : client_connection_check_interval);
3310 : }
3311 : }
3312 :
3313 4000 : if (ClientConnectionLost)
3314 : {
3315 50 : QueryCancelPending = false; /* lost connection trumps QueryCancel */
3316 50 : LockErrorCleanup();
3317 : /* don't send to client, we already know the connection to be dead. */
3318 50 : whereToSendOutput = DestNone;
3319 50 : ereport(FATAL,
3320 : (errcode(ERRCODE_CONNECTION_FAILURE),
3321 : errmsg("connection to client lost")));
3322 : }
3323 :
3324 : /*
3325 : * Don't allow query cancel interrupts while reading input from the
3326 : * client, because we might lose sync in the FE/BE protocol. (Die
3327 : * interrupts are OK, because we won't read any further messages from the
3328 : * client in that case.)
3329 : *
3330 : * See similar logic in ProcessRecoveryConflictInterrupts().
3331 : */
3332 3950 : if (QueryCancelPending && QueryCancelHoldoffCount != 0)
3333 : {
3334 : /*
3335 : * Re-arm InterruptPending so that we process the cancel request as
3336 : * soon as we're done reading the message. (XXX this is seriously
3337 : * ugly: it complicates INTERRUPTS_CAN_BE_PROCESSED(), and it means we
3338 : * can't use that macro directly as the initial test in this function,
3339 : * meaning that this code also creates opportunities for other bugs to
3340 : * appear.)
3341 : */
3342 44 : InterruptPending = true;
3343 : }
3344 3906 : else if (QueryCancelPending)
3345 : {
3346 : bool lock_timeout_occurred;
3347 : bool stmt_timeout_occurred;
3348 :
3349 110 : QueryCancelPending = false;
3350 :
3351 : /*
3352 : * If LOCK_TIMEOUT and STATEMENT_TIMEOUT indicators are both set, we
3353 : * need to clear both, so always fetch both.
3354 : */
3355 110 : lock_timeout_occurred = get_timeout_indicator(LOCK_TIMEOUT, true);
3356 110 : stmt_timeout_occurred = get_timeout_indicator(STATEMENT_TIMEOUT, true);
3357 :
3358 : /*
3359 : * If both were set, we want to report whichever timeout completed
3360 : * earlier; this ensures consistent behavior if the machine is slow
3361 : * enough that the second timeout triggers before we get here. A tie
3362 : * is arbitrarily broken in favor of reporting a lock timeout.
3363 : */
3364 110 : if (lock_timeout_occurred && stmt_timeout_occurred &&
3365 0 : get_timeout_finish_time(STATEMENT_TIMEOUT) < get_timeout_finish_time(LOCK_TIMEOUT))
3366 0 : lock_timeout_occurred = false; /* report stmt timeout */
3367 :
3368 110 : if (lock_timeout_occurred)
3369 : {
3370 8 : LockErrorCleanup();
3371 8 : ereport(ERROR,
3372 : (errcode(ERRCODE_LOCK_NOT_AVAILABLE),
3373 : errmsg("canceling statement due to lock timeout")));
3374 : }
3375 102 : if (stmt_timeout_occurred)
3376 : {
3377 12 : LockErrorCleanup();
3378 12 : ereport(ERROR,
3379 : (errcode(ERRCODE_QUERY_CANCELED),
3380 : errmsg("canceling statement due to statement timeout")));
3381 : }
3382 90 : if (AmAutoVacuumWorkerProcess())
3383 : {
3384 0 : LockErrorCleanup();
3385 0 : ereport(ERROR,
3386 : (errcode(ERRCODE_QUERY_CANCELED),
3387 : errmsg("canceling autovacuum task")));
3388 : }
3389 :
3390 : /*
3391 : * If we are reading a command from the client, just ignore the cancel
3392 : * request --- sending an extra error message won't accomplish
3393 : * anything. Otherwise, go ahead and throw the error.
3394 : */
3395 90 : if (!DoingCommandRead)
3396 : {
3397 70 : LockErrorCleanup();
3398 70 : ereport(ERROR,
3399 : (errcode(ERRCODE_QUERY_CANCELED),
3400 : errmsg("canceling statement due to user request")));
3401 : }
3402 : }
3403 :
3404 3860 : if (RecoveryConflictPending)
3405 38 : ProcessRecoveryConflictInterrupts();
3406 :
3407 3836 : if (IdleInTransactionSessionTimeoutPending)
3408 : {
3409 : /*
3410 : * If the GUC has been reset to zero, ignore the signal. This is
3411 : * important because the GUC update itself won't disable any pending
3412 : * interrupt. We need to unset the flag before the injection point,
3413 : * otherwise we could loop in interrupts checking.
3414 : */
3415 0 : IdleInTransactionSessionTimeoutPending = false;
3416 0 : if (IdleInTransactionSessionTimeout > 0)
3417 : {
3418 : INJECTION_POINT("idle-in-transaction-session-timeout");
3419 0 : ereport(FATAL,
3420 : (errcode(ERRCODE_IDLE_IN_TRANSACTION_SESSION_TIMEOUT),
3421 : errmsg("terminating connection due to idle-in-transaction timeout")));
3422 : }
3423 : }
3424 :
3425 3836 : if (TransactionTimeoutPending)
3426 : {
3427 : /* As above, ignore the signal if the GUC has been reset to zero. */
3428 0 : TransactionTimeoutPending = false;
3429 0 : if (TransactionTimeout > 0)
3430 : {
3431 : INJECTION_POINT("transaction-timeout");
3432 0 : ereport(FATAL,
3433 : (errcode(ERRCODE_TRANSACTION_TIMEOUT),
3434 : errmsg("terminating connection due to transaction timeout")));
3435 : }
3436 : }
3437 :
3438 3836 : if (IdleSessionTimeoutPending)
3439 : {
3440 : /* As above, ignore the signal if the GUC has been reset to zero. */
3441 0 : IdleSessionTimeoutPending = false;
3442 0 : if (IdleSessionTimeout > 0)
3443 : {
3444 : INJECTION_POINT("idle-session-timeout");
3445 0 : ereport(FATAL,
3446 : (errcode(ERRCODE_IDLE_SESSION_TIMEOUT),
3447 : errmsg("terminating connection due to idle-session timeout")));
3448 : }
3449 : }
3450 :
3451 : /*
3452 : * If there are pending stats updates and we currently are truly idle
3453 : * (matching the conditions in PostgresMain(), report stats now.
3454 : */
3455 3836 : if (IdleStatsUpdateTimeoutPending &&
3456 30 : DoingCommandRead && !IsTransactionOrTransactionBlock())
3457 : {
3458 2 : IdleStatsUpdateTimeoutPending = false;
3459 2 : pgstat_report_stat(true);
3460 : }
3461 :
3462 3836 : if (ProcSignalBarrierPending)
3463 288 : ProcessProcSignalBarrier();
3464 :
3465 3836 : if (ParallelMessagePending)
3466 3344 : HandleParallelMessages();
3467 :
3468 3830 : if (LogMemoryContextPending)
3469 14 : ProcessLogMemoryContextInterrupt();
3470 :
3471 3830 : if (ParallelApplyMessagePending)
3472 10 : HandleParallelApplyMessages();
3473 : }
3474 :
3475 : /*
3476 : * set_stack_base: set up reference point for stack depth checking
3477 : *
3478 : * Returns the old reference point, if any.
3479 : */
3480 : pg_stack_base_t
3481 31328 : set_stack_base(void)
3482 : {
3483 : #ifndef HAVE__BUILTIN_FRAME_ADDRESS
3484 : char stack_base;
3485 : #endif
3486 : pg_stack_base_t old;
3487 :
3488 31328 : old = stack_base_ptr;
3489 :
3490 : /*
3491 : * Set up reference point for stack depth checking. On recent gcc we use
3492 : * __builtin_frame_address() to avoid a warning about storing a local
3493 : * variable's address in a long-lived variable.
3494 : */
3495 : #ifdef HAVE__BUILTIN_FRAME_ADDRESS
3496 31328 : stack_base_ptr = __builtin_frame_address(0);
3497 : #else
3498 : stack_base_ptr = &stack_base;
3499 : #endif
3500 :
3501 31328 : return old;
3502 : }
3503 :
3504 : /*
3505 : * restore_stack_base: restore reference point for stack depth checking
3506 : *
3507 : * This can be used after set_stack_base() to restore the old value. This
3508 : * is currently only used in PL/Java. When PL/Java calls a backend function
3509 : * from different thread, the thread's stack is at a different location than
3510 : * the main thread's stack, so it sets the base pointer before the call, and
3511 : * restores it afterwards.
3512 : */
3513 : void
3514 0 : restore_stack_base(pg_stack_base_t base)
3515 : {
3516 0 : stack_base_ptr = base;
3517 0 : }
3518 :
3519 : /*
3520 : * check_stack_depth/stack_is_too_deep: check for excessively deep recursion
3521 : *
3522 : * This should be called someplace in any recursive routine that might possibly
3523 : * recurse deep enough to overflow the stack. Most Unixen treat stack
3524 : * overflow as an unrecoverable SIGSEGV, so we want to error out ourselves
3525 : * before hitting the hardware limit.
3526 : *
3527 : * check_stack_depth() just throws an error summarily. stack_is_too_deep()
3528 : * can be used by code that wants to handle the error condition itself.
3529 : */
3530 : void
3531 532590202 : check_stack_depth(void)
3532 : {
3533 532590202 : if (stack_is_too_deep())
3534 : {
3535 30 : ereport(ERROR,
3536 : (errcode(ERRCODE_STATEMENT_TOO_COMPLEX),
3537 : errmsg("stack depth limit exceeded"),
3538 : errhint("Increase the configuration parameter max_stack_depth (currently %dkB), "
3539 : "after ensuring the platform's stack depth limit is adequate.",
3540 : max_stack_depth)));
3541 : }
3542 532590172 : }
3543 :
3544 : bool
3545 554262928 : stack_is_too_deep(void)
3546 : {
3547 : char stack_top_loc;
3548 : long stack_depth;
3549 :
3550 : /*
3551 : * Compute distance from reference point to my local variables
3552 : */
3553 554262928 : stack_depth = (long) (stack_base_ptr - &stack_top_loc);
3554 :
3555 : /*
3556 : * Take abs value, since stacks grow up on some machines, down on others
3557 : */
3558 554262928 : if (stack_depth < 0)
3559 43850520 : stack_depth = -stack_depth;
3560 :
3561 : /*
3562 : * Trouble?
3563 : *
3564 : * The test on stack_base_ptr prevents us from erroring out if called
3565 : * during process setup or in a non-backend process. Logically it should
3566 : * be done first, but putting it here avoids wasting cycles during normal
3567 : * cases.
3568 : */
3569 554262928 : if (stack_depth > max_stack_depth_bytes &&
3570 43850550 : stack_base_ptr != NULL)
3571 30 : return true;
3572 :
3573 554262898 : return false;
3574 : }
3575 :
3576 : /* GUC check hook for max_stack_depth */
3577 : bool
3578 9704 : check_max_stack_depth(int *newval, void **extra, GucSource source)
3579 : {
3580 9704 : long newval_bytes = *newval * 1024L;
3581 9704 : long stack_rlimit = get_stack_depth_rlimit();
3582 :
3583 9704 : if (stack_rlimit > 0 && newval_bytes > stack_rlimit - STACK_DEPTH_SLOP)
3584 : {
3585 0 : GUC_check_errdetail("max_stack_depth must not exceed %ldkB.",
3586 0 : (stack_rlimit - STACK_DEPTH_SLOP) / 1024L);
3587 0 : GUC_check_errhint("Increase the platform's stack depth limit via \"ulimit -s\" or local equivalent.");
3588 0 : return false;
3589 : }
3590 9704 : return true;
3591 : }
3592 :
3593 : /* GUC assign hook for max_stack_depth */
3594 : void
3595 9712 : assign_max_stack_depth(int newval, void *extra)
3596 : {
3597 9712 : long newval_bytes = newval * 1024L;
3598 :
3599 9712 : max_stack_depth_bytes = newval_bytes;
3600 9712 : }
3601 :
3602 : /*
3603 : * GUC check_hook for client_connection_check_interval
3604 : */
3605 : bool
3606 1830 : check_client_connection_check_interval(int *newval, void **extra, GucSource source)
3607 : {
3608 1830 : if (!WaitEventSetCanReportClosed() && *newval != 0)
3609 : {
3610 0 : GUC_check_errdetail("client_connection_check_interval must be set to 0 on this platform.");
3611 0 : return false;
3612 : }
3613 1830 : return true;
3614 : }
3615 :
3616 : /*
3617 : * GUC check_hook for log_parser_stats, log_planner_stats, log_executor_stats
3618 : *
3619 : * This function and check_log_stats interact to prevent their variables from
3620 : * being set in a disallowed combination. This is a hack that doesn't really
3621 : * work right; for example it might fail while applying pg_db_role_setting
3622 : * values even though the final state would have been acceptable. However,
3623 : * since these variables are legacy settings with little production usage,
3624 : * we tolerate that.
3625 : */
3626 : bool
3627 5490 : check_stage_log_stats(bool *newval, void **extra, GucSource source)
3628 : {
3629 5490 : if (*newval && log_statement_stats)
3630 : {
3631 0 : GUC_check_errdetail("Cannot enable parameter when \"log_statement_stats\" is true.");
3632 0 : return false;
3633 : }
3634 5490 : return true;
3635 : }
3636 :
3637 : /*
3638 : * GUC check_hook for log_statement_stats
3639 : */
3640 : bool
3641 1830 : check_log_stats(bool *newval, void **extra, GucSource source)
3642 : {
3643 1830 : if (*newval &&
3644 0 : (log_parser_stats || log_planner_stats || log_executor_stats))
3645 : {
3646 0 : GUC_check_errdetail("Cannot enable log_statement_stats when "
3647 : "log_parser_stats, log_planner_stats, "
3648 : "or log_executor_stats is true.");
3649 0 : return false;
3650 : }
3651 1830 : return true;
3652 : }
3653 :
3654 : /* GUC assign hook for transaction_timeout */
3655 : void
3656 3024 : assign_transaction_timeout(int newval, void *extra)
3657 : {
3658 3024 : if (IsTransactionState())
3659 : {
3660 : /*
3661 : * If transaction_timeout GUC has changed within the transaction block
3662 : * enable or disable the timer correspondingly.
3663 : */
3664 520 : if (newval > 0 && !get_timeout_active(TRANSACTION_TIMEOUT))
3665 0 : enable_timeout_after(TRANSACTION_TIMEOUT, newval);
3666 520 : else if (newval <= 0 && get_timeout_active(TRANSACTION_TIMEOUT))
3667 0 : disable_timeout(TRANSACTION_TIMEOUT, false);
3668 : }
3669 3024 : }
3670 :
3671 :
3672 : /*
3673 : * set_debug_options --- apply "-d N" command line option
3674 : *
3675 : * -d is not quite the same as setting log_min_messages because it enables
3676 : * other output options.
3677 : */
3678 : void
3679 0 : set_debug_options(int debug_flag, GucContext context, GucSource source)
3680 : {
3681 0 : if (debug_flag > 0)
3682 : {
3683 : char debugstr[64];
3684 :
3685 0 : sprintf(debugstr, "debug%d", debug_flag);
3686 0 : SetConfigOption("log_min_messages", debugstr, context, source);
3687 : }
3688 : else
3689 0 : SetConfigOption("log_min_messages", "notice", context, source);
3690 :
3691 0 : if (debug_flag >= 1 && context == PGC_POSTMASTER)
3692 : {
3693 0 : SetConfigOption("log_connections", "true", context, source);
3694 0 : SetConfigOption("log_disconnections", "true", context, source);
3695 : }
3696 0 : if (debug_flag >= 2)
3697 0 : SetConfigOption("log_statement", "all", context, source);
3698 0 : if (debug_flag >= 3)
3699 0 : SetConfigOption("debug_print_parse", "true", context, source);
3700 0 : if (debug_flag >= 4)
3701 0 : SetConfigOption("debug_print_plan", "true", context, source);
3702 0 : if (debug_flag >= 5)
3703 0 : SetConfigOption("debug_print_rewritten", "true", context, source);
3704 0 : }
3705 :
3706 :
3707 : bool
3708 0 : set_plan_disabling_options(const char *arg, GucContext context, GucSource source)
3709 : {
3710 0 : const char *tmp = NULL;
3711 :
3712 0 : switch (arg[0])
3713 : {
3714 0 : case 's': /* seqscan */
3715 0 : tmp = "enable_seqscan";
3716 0 : break;
3717 0 : case 'i': /* indexscan */
3718 0 : tmp = "enable_indexscan";
3719 0 : break;
3720 0 : case 'o': /* indexonlyscan */
3721 0 : tmp = "enable_indexonlyscan";
3722 0 : break;
3723 0 : case 'b': /* bitmapscan */
3724 0 : tmp = "enable_bitmapscan";
3725 0 : break;
3726 0 : case 't': /* tidscan */
3727 0 : tmp = "enable_tidscan";
3728 0 : break;
3729 0 : case 'n': /* nestloop */
3730 0 : tmp = "enable_nestloop";
3731 0 : break;
3732 0 : case 'm': /* mergejoin */
3733 0 : tmp = "enable_mergejoin";
3734 0 : break;
3735 0 : case 'h': /* hashjoin */
3736 0 : tmp = "enable_hashjoin";
3737 0 : break;
3738 : }
3739 0 : if (tmp)
3740 : {
3741 0 : SetConfigOption(tmp, "false", context, source);
3742 0 : return true;
3743 : }
3744 : else
3745 0 : return false;
3746 : }
3747 :
3748 :
3749 : const char *
3750 0 : get_stats_option_name(const char *arg)
3751 : {
3752 0 : switch (arg[0])
3753 : {
3754 0 : case 'p':
3755 0 : if (optarg[1] == 'a') /* "parser" */
3756 0 : return "log_parser_stats";
3757 0 : else if (optarg[1] == 'l') /* "planner" */
3758 0 : return "log_planner_stats";
3759 0 : break;
3760 :
3761 0 : case 'e': /* "executor" */
3762 0 : return "log_executor_stats";
3763 : break;
3764 : }
3765 :
3766 0 : return NULL;
3767 : }
3768 :
3769 :
3770 : /* ----------------------------------------------------------------
3771 : * process_postgres_switches
3772 : * Parse command line arguments for backends
3773 : *
3774 : * This is called twice, once for the "secure" options coming from the
3775 : * postmaster or command line, and once for the "insecure" options coming
3776 : * from the client's startup packet. The latter have the same syntax but
3777 : * may be restricted in what they can do.
3778 : *
3779 : * argv[0] is ignored in either case (it's assumed to be the program name).
3780 : *
3781 : * ctx is PGC_POSTMASTER for secure options, PGC_BACKEND for insecure options
3782 : * coming from the client, or PGC_SU_BACKEND for insecure options coming from
3783 : * a superuser client.
3784 : *
3785 : * If a database name is present in the command line arguments, it's
3786 : * returned into *dbname (this is allowed only if *dbname is initially NULL).
3787 : * ----------------------------------------------------------------
3788 : */
3789 : void
3790 6156 : process_postgres_switches(int argc, char *argv[], GucContext ctx,
3791 : const char **dbname)
3792 : {
3793 6156 : bool secure = (ctx == PGC_POSTMASTER);
3794 6156 : int errs = 0;
3795 : GucSource gucsource;
3796 : int flag;
3797 :
3798 6156 : if (secure)
3799 : {
3800 102 : gucsource = PGC_S_ARGV; /* switches came from command line */
3801 :
3802 : /* Ignore the initial --single argument, if present */
3803 102 : if (argc > 1 && strcmp(argv[1], "--single") == 0)
3804 : {
3805 102 : argv++;
3806 102 : argc--;
3807 : }
3808 : }
3809 : else
3810 : {
3811 6054 : gucsource = PGC_S_CLIENT; /* switches came from client */
3812 : }
3813 :
3814 : #ifdef HAVE_INT_OPTERR
3815 :
3816 : /*
3817 : * Turn this off because it's either printed to stderr and not the log
3818 : * where we'd want it, or argv[0] is now "--single", which would make for
3819 : * a weird error message. We print our own error message below.
3820 : */
3821 6156 : opterr = 0;
3822 : #endif
3823 :
3824 : /*
3825 : * Parse command-line options. CAUTION: keep this in sync with
3826 : * postmaster/postmaster.c (the option sets should not conflict) and with
3827 : * the common help() function in main/main.c.
3828 : */
3829 14782 : while ((flag = getopt(argc, argv, "B:bC:c:D:d:EeFf:h:ijk:lN:nOPp:r:S:sTt:v:W:-:")) != -1)
3830 : {
3831 8626 : switch (flag)
3832 : {
3833 0 : case 'B':
3834 0 : SetConfigOption("shared_buffers", optarg, ctx, gucsource);
3835 0 : break;
3836 :
3837 0 : case 'b':
3838 : /* Undocumented flag used for binary upgrades */
3839 0 : if (secure)
3840 0 : IsBinaryUpgrade = true;
3841 0 : break;
3842 :
3843 0 : case 'C':
3844 : /* ignored for consistency with the postmaster */
3845 0 : break;
3846 :
3847 8344 : case 'c':
3848 : case '-':
3849 : {
3850 : char *name,
3851 : *value;
3852 :
3853 8344 : ParseLongOption(optarg, &name, &value);
3854 8344 : if (!value)
3855 : {
3856 0 : if (flag == '-')
3857 0 : ereport(ERROR,
3858 : (errcode(ERRCODE_SYNTAX_ERROR),
3859 : errmsg("--%s requires a value",
3860 : optarg)));
3861 : else
3862 0 : ereport(ERROR,
3863 : (errcode(ERRCODE_SYNTAX_ERROR),
3864 : errmsg("-c %s requires a value",
3865 : optarg)));
3866 : }
3867 8344 : SetConfigOption(name, value, ctx, gucsource);
3868 8344 : pfree(name);
3869 8344 : pfree(value);
3870 8344 : break;
3871 : }
3872 :
3873 22 : case 'D':
3874 22 : if (secure)
3875 22 : userDoption = strdup(optarg);
3876 22 : break;
3877 :
3878 0 : case 'd':
3879 0 : set_debug_options(atoi(optarg), ctx, gucsource);
3880 0 : break;
3881 :
3882 0 : case 'E':
3883 0 : if (secure)
3884 0 : EchoQuery = true;
3885 0 : break;
3886 :
3887 0 : case 'e':
3888 0 : SetConfigOption("datestyle", "euro", ctx, gucsource);
3889 0 : break;
3890 :
3891 100 : case 'F':
3892 100 : SetConfigOption("fsync", "false", ctx, gucsource);
3893 100 : break;
3894 :
3895 0 : case 'f':
3896 0 : if (!set_plan_disabling_options(optarg, ctx, gucsource))
3897 0 : errs++;
3898 0 : break;
3899 :
3900 0 : case 'h':
3901 0 : SetConfigOption("listen_addresses", optarg, ctx, gucsource);
3902 0 : break;
3903 :
3904 0 : case 'i':
3905 0 : SetConfigOption("listen_addresses", "*", ctx, gucsource);
3906 0 : break;
3907 :
3908 80 : case 'j':
3909 80 : if (secure)
3910 80 : UseSemiNewlineNewline = true;
3911 80 : break;
3912 :
3913 0 : case 'k':
3914 0 : SetConfigOption("unix_socket_directories", optarg, ctx, gucsource);
3915 0 : break;
3916 :
3917 0 : case 'l':
3918 0 : SetConfigOption("ssl", "true", ctx, gucsource);
3919 0 : break;
3920 :
3921 0 : case 'N':
3922 0 : SetConfigOption("max_connections", optarg, ctx, gucsource);
3923 0 : break;
3924 :
3925 0 : case 'n':
3926 : /* ignored for consistency with postmaster */
3927 0 : break;
3928 :
3929 80 : case 'O':
3930 80 : SetConfigOption("allow_system_table_mods", "true", ctx, gucsource);
3931 80 : break;
3932 :
3933 0 : case 'P':
3934 0 : SetConfigOption("ignore_system_indexes", "true", ctx, gucsource);
3935 0 : break;
3936 :
3937 0 : case 'p':
3938 0 : SetConfigOption("port", optarg, ctx, gucsource);
3939 0 : break;
3940 :
3941 0 : case 'r':
3942 : /* send output (stdout and stderr) to the given file */
3943 0 : if (secure)
3944 0 : strlcpy(OutputFileName, optarg, MAXPGPATH);
3945 0 : break;
3946 :
3947 0 : case 'S':
3948 0 : SetConfigOption("work_mem", optarg, ctx, gucsource);
3949 0 : break;
3950 :
3951 0 : case 's':
3952 0 : SetConfigOption("log_statement_stats", "true", ctx, gucsource);
3953 0 : break;
3954 :
3955 0 : case 'T':
3956 : /* ignored for consistency with the postmaster */
3957 0 : break;
3958 :
3959 0 : case 't':
3960 : {
3961 0 : const char *tmp = get_stats_option_name(optarg);
3962 :
3963 0 : if (tmp)
3964 0 : SetConfigOption(tmp, "true", ctx, gucsource);
3965 : else
3966 0 : errs++;
3967 0 : break;
3968 : }
3969 :
3970 0 : case 'v':
3971 :
3972 : /*
3973 : * -v is no longer used in normal operation, since
3974 : * FrontendProtocol is already set before we get here. We keep
3975 : * the switch only for possible use in standalone operation,
3976 : * in case we ever support using normal FE/BE protocol with a
3977 : * standalone backend.
3978 : */
3979 0 : if (secure)
3980 0 : FrontendProtocol = (ProtocolVersion) atoi(optarg);
3981 0 : break;
3982 :
3983 0 : case 'W':
3984 0 : SetConfigOption("post_auth_delay", optarg, ctx, gucsource);
3985 0 : break;
3986 :
3987 0 : default:
3988 0 : errs++;
3989 0 : break;
3990 : }
3991 :
3992 8626 : if (errs)
3993 0 : break;
3994 : }
3995 :
3996 : /*
3997 : * Optional database name should be there only if *dbname is NULL.
3998 : */
3999 6156 : if (!errs && dbname && *dbname == NULL && argc - optind >= 1)
4000 102 : *dbname = strdup(argv[optind++]);
4001 :
4002 6156 : if (errs || argc != optind)
4003 : {
4004 0 : if (errs)
4005 0 : optind--; /* complain about the previous argument */
4006 :
4007 : /* spell the error message a bit differently depending on context */
4008 0 : if (IsUnderPostmaster)
4009 0 : ereport(FATAL,
4010 : errcode(ERRCODE_SYNTAX_ERROR),
4011 : errmsg("invalid command-line argument for server process: %s", argv[optind]),
4012 : errhint("Try \"%s --help\" for more information.", progname));
4013 : else
4014 0 : ereport(FATAL,
4015 : errcode(ERRCODE_SYNTAX_ERROR),
4016 : errmsg("%s: invalid command-line argument: %s",
4017 : progname, argv[optind]),
4018 : errhint("Try \"%s --help\" for more information.", progname));
4019 : }
4020 :
4021 : /*
4022 : * Reset getopt(3) library so that it will work correctly in subprocesses
4023 : * or when this function is called a second time with another array.
4024 : */
4025 6156 : optind = 1;
4026 : #ifdef HAVE_INT_OPTRESET
4027 : optreset = 1; /* some systems need this too */
4028 : #endif
4029 6156 : }
4030 :
4031 :
4032 : /*
4033 : * PostgresSingleUserMain
4034 : * Entry point for single user mode. argc/argv are the command line
4035 : * arguments to be used.
4036 : *
4037 : * Performs single user specific setup then calls PostgresMain() to actually
4038 : * process queries. Single user mode specific setup should go here, rather
4039 : * than PostgresMain() or InitPostgres() when reasonably possible.
4040 : */
4041 : void
4042 102 : PostgresSingleUserMain(int argc, char *argv[],
4043 : const char *username)
4044 : {
4045 102 : const char *dbname = NULL;
4046 :
4047 : Assert(!IsUnderPostmaster);
4048 :
4049 : /* Initialize startup process environment. */
4050 102 : InitStandaloneProcess(argv[0]);
4051 :
4052 : /*
4053 : * Set default values for command-line options.
4054 : */
4055 102 : InitializeGUCOptions();
4056 :
4057 : /*
4058 : * Parse command-line options.
4059 : */
4060 102 : process_postgres_switches(argc, argv, PGC_POSTMASTER, &dbname);
4061 :
4062 : /* Must have gotten a database name, or have a default (the username) */
4063 102 : if (dbname == NULL)
4064 : {
4065 0 : dbname = username;
4066 0 : if (dbname == NULL)
4067 0 : ereport(FATAL,
4068 : (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
4069 : errmsg("%s: no database nor user name specified",
4070 : progname)));
4071 : }
4072 :
4073 : /* Acquire configuration parameters */
4074 102 : if (!SelectConfigFiles(userDoption, progname))
4075 0 : proc_exit(1);
4076 :
4077 : /*
4078 : * Validate we have been given a reasonable-looking DataDir and change
4079 : * into it.
4080 : */
4081 102 : checkDataDir();
4082 102 : ChangeToDataDir();
4083 :
4084 : /*
4085 : * Create lockfile for data directory.
4086 : */
4087 102 : CreateDataDirLockFile(false);
4088 :
4089 : /* read control file (error checking and contains config ) */
4090 100 : LocalProcessControlFile(false);
4091 :
4092 : /*
4093 : * process any libraries that should be preloaded at postmaster start
4094 : */
4095 100 : process_shared_preload_libraries();
4096 :
4097 : /* Initialize MaxBackends */
4098 100 : InitializeMaxBackends();
4099 :
4100 : /*
4101 : * Give preloaded libraries a chance to request additional shared memory.
4102 : */
4103 100 : process_shmem_requests();
4104 :
4105 : /*
4106 : * Now that loadable modules have had their chance to request additional
4107 : * shared memory, determine the value of any runtime-computed GUCs that
4108 : * depend on the amount of shared memory required.
4109 : */
4110 100 : InitializeShmemGUCs();
4111 :
4112 : /*
4113 : * Now that modules have been loaded, we can process any custom resource
4114 : * managers specified in the wal_consistency_checking GUC.
4115 : */
4116 100 : InitializeWalConsistencyChecking();
4117 :
4118 100 : CreateSharedMemoryAndSemaphores();
4119 :
4120 : /*
4121 : * Remember stand-alone backend startup time,roughly at the same point
4122 : * during startup that postmaster does so.
4123 : */
4124 98 : PgStartTime = GetCurrentTimestamp();
4125 :
4126 : /*
4127 : * Create a per-backend PGPROC struct in shared memory. We must do this
4128 : * before we can use LWLocks.
4129 : */
4130 98 : InitProcess();
4131 :
4132 : /*
4133 : * Now that sufficient infrastructure has been initialized, PostgresMain()
4134 : * can do the rest.
4135 : */
4136 98 : PostgresMain(dbname, username);
4137 : }
4138 :
4139 :
4140 : /* ----------------------------------------------------------------
4141 : * PostgresMain
4142 : * postgres main loop -- all backends, interactive or otherwise loop here
4143 : *
4144 : * dbname is the name of the database to connect to, username is the
4145 : * PostgreSQL user name to be used for the session.
4146 : *
4147 : * NB: Single user mode specific setup should go to PostgresSingleUserMain()
4148 : * if reasonably possible.
4149 : * ----------------------------------------------------------------
4150 : */
4151 : void
4152 20808 : PostgresMain(const char *dbname, const char *username)
4153 : {
4154 : sigjmp_buf local_sigjmp_buf;
4155 :
4156 : /* these must be volatile to ensure state is preserved across longjmp: */
4157 20808 : volatile bool send_ready_for_query = true;
4158 20808 : volatile bool idle_in_transaction_timeout_enabled = false;
4159 20808 : volatile bool idle_session_timeout_enabled = false;
4160 :
4161 : Assert(dbname != NULL);
4162 : Assert(username != NULL);
4163 :
4164 20808 : SetProcessingMode(InitProcessing);
4165 :
4166 : /*
4167 : * Set up signal handlers. (InitPostmasterChild or InitStandaloneProcess
4168 : * has already set up BlockSig and made that the active signal mask.)
4169 : *
4170 : * Note that postmaster blocked all signals before forking child process,
4171 : * so there is no race condition whereby we might receive a signal before
4172 : * we have set up the handler.
4173 : *
4174 : * Also note: it's best not to use any signals that are SIG_IGNored in the
4175 : * postmaster. If such a signal arrives before we are able to change the
4176 : * handler to non-SIG_IGN, it'll get dropped. Instead, make a dummy
4177 : * handler in the postmaster to reserve the signal. (Of course, this isn't
4178 : * an issue for signals that are locally generated, such as SIGALRM and
4179 : * SIGPIPE.)
4180 : */
4181 20808 : if (am_walsender)
4182 1956 : WalSndSignals();
4183 : else
4184 : {
4185 18852 : pqsignal(SIGHUP, SignalHandlerForConfigReload);
4186 18852 : pqsignal(SIGINT, StatementCancelHandler); /* cancel current query */
4187 18852 : pqsignal(SIGTERM, die); /* cancel current query and exit */
4188 :
4189 : /*
4190 : * In a postmaster child backend, replace SignalHandlerForCrashExit
4191 : * with quickdie, so we can tell the client we're dying.
4192 : *
4193 : * In a standalone backend, SIGQUIT can be generated from the keyboard
4194 : * easily, while SIGTERM cannot, so we make both signals do die()
4195 : * rather than quickdie().
4196 : */
4197 18852 : if (IsUnderPostmaster)
4198 18754 : pqsignal(SIGQUIT, quickdie); /* hard crash time */
4199 : else
4200 98 : pqsignal(SIGQUIT, die); /* cancel current query and exit */
4201 18852 : InitializeTimeouts(); /* establishes SIGALRM handler */
4202 :
4203 : /*
4204 : * Ignore failure to write to frontend. Note: if frontend closes
4205 : * connection, we will notice it and exit cleanly when control next
4206 : * returns to outer loop. This seems safer than forcing exit in the
4207 : * midst of output during who-knows-what operation...
4208 : */
4209 18852 : pqsignal(SIGPIPE, SIG_IGN);
4210 18852 : pqsignal(SIGUSR1, procsignal_sigusr1_handler);
4211 18852 : pqsignal(SIGUSR2, SIG_IGN);
4212 18852 : pqsignal(SIGFPE, FloatExceptionHandler);
4213 :
4214 : /*
4215 : * Reset some signals that are accepted by postmaster but not by
4216 : * backend
4217 : */
4218 18852 : pqsignal(SIGCHLD, SIG_DFL); /* system() requires this on some
4219 : * platforms */
4220 : }
4221 :
4222 : /* Early initialization */
4223 20808 : BaseInit();
4224 :
4225 : /* We need to allow SIGINT, etc during the initial transaction */
4226 20808 : sigprocmask(SIG_SETMASK, &UnBlockSig, NULL);
4227 :
4228 : /*
4229 : * General initialization.
4230 : *
4231 : * NOTE: if you are tempted to add code in this vicinity, consider putting
4232 : * it inside InitPostgres() instead. In particular, anything that
4233 : * involves database access should be there, not here.
4234 : *
4235 : * Honor session_preload_libraries if not dealing with a WAL sender.
4236 : */
4237 20808 : InitPostgres(dbname, InvalidOid, /* database to connect to */
4238 : username, InvalidOid, /* role to connect as */
4239 20808 : (!am_walsender) ? INIT_PG_LOAD_SESSION_LIBS : 0,
4240 : NULL); /* no out_dbname */
4241 :
4242 : /*
4243 : * If the PostmasterContext is still around, recycle the space; we don't
4244 : * need it anymore after InitPostgres completes.
4245 : */
4246 20650 : if (PostmasterContext)
4247 : {
4248 20556 : MemoryContextDelete(PostmasterContext);
4249 20556 : PostmasterContext = NULL;
4250 : }
4251 :
4252 20650 : SetProcessingMode(NormalProcessing);
4253 :
4254 : /*
4255 : * Now all GUC states are fully set up. Report them to client if
4256 : * appropriate.
4257 : */
4258 20650 : BeginReportingGUCOptions();
4259 :
4260 : /*
4261 : * Also set up handler to log session end; we have to wait till now to be
4262 : * sure Log_disconnections has its final value.
4263 : */
4264 20650 : if (IsUnderPostmaster && Log_disconnections)
4265 16 : on_proc_exit(log_disconnections, 0);
4266 :
4267 20650 : pgstat_report_connect(MyDatabaseId);
4268 :
4269 : /* Perform initialization specific to a WAL sender process. */
4270 20650 : if (am_walsender)
4271 1956 : InitWalSender();
4272 :
4273 : /*
4274 : * Send this backend's cancellation info to the frontend.
4275 : */
4276 20650 : if (whereToSendOutput == DestRemote)
4277 : {
4278 : StringInfoData buf;
4279 :
4280 20556 : pq_beginmessage(&buf, PqMsg_BackendKeyData);
4281 20556 : pq_sendint32(&buf, (int32) MyProcPid);
4282 20556 : pq_sendint32(&buf, (int32) MyCancelKey);
4283 20556 : pq_endmessage(&buf);
4284 : /* Need not flush since ReadyForQuery will do it. */
4285 : }
4286 :
4287 : /* Welcome banner for standalone case */
4288 20650 : if (whereToSendOutput == DestDebug)
4289 94 : printf("\nPostgreSQL stand-alone backend %s\n", PG_VERSION);
4290 :
4291 : /*
4292 : * Create the memory context we will use in the main loop.
4293 : *
4294 : * MessageContext is reset once per iteration of the main loop, ie, upon
4295 : * completion of processing of each command message from the client.
4296 : */
4297 20650 : MessageContext = AllocSetContextCreate(TopMemoryContext,
4298 : "MessageContext",
4299 : ALLOCSET_DEFAULT_SIZES);
4300 :
4301 : /*
4302 : * Create memory context and buffer used for RowDescription messages. As
4303 : * SendRowDescriptionMessage(), via exec_describe_statement_message(), is
4304 : * frequently executed for ever single statement, we don't want to
4305 : * allocate a separate buffer every time.
4306 : */
4307 20650 : row_description_context = AllocSetContextCreate(TopMemoryContext,
4308 : "RowDescriptionContext",
4309 : ALLOCSET_DEFAULT_SIZES);
4310 20650 : MemoryContextSwitchTo(row_description_context);
4311 20650 : initStringInfo(&row_description_buf);
4312 20650 : MemoryContextSwitchTo(TopMemoryContext);
4313 :
4314 : /* Fire any defined login event triggers, if appropriate */
4315 20650 : EventTriggerOnLogin();
4316 :
4317 : /*
4318 : * POSTGRES main processing loop begins here
4319 : *
4320 : * If an exception is encountered, processing resumes here so we abort the
4321 : * current transaction and start a new one.
4322 : *
4323 : * You might wonder why this isn't coded as an infinite loop around a
4324 : * PG_TRY construct. The reason is that this is the bottom of the
4325 : * exception stack, and so with PG_TRY there would be no exception handler
4326 : * in force at all during the CATCH part. By leaving the outermost setjmp
4327 : * always active, we have at least some chance of recovering from an error
4328 : * during error recovery. (If we get into an infinite loop thereby, it
4329 : * will soon be stopped by overflow of elog.c's internal state stack.)
4330 : *
4331 : * Note that we use sigsetjmp(..., 1), so that this function's signal mask
4332 : * (to wit, UnBlockSig) will be restored when longjmp'ing to here. This
4333 : * is essential in case we longjmp'd out of a signal handler on a platform
4334 : * where that leaves the signal blocked. It's not redundant with the
4335 : * unblock in AbortTransaction() because the latter is only called if we
4336 : * were inside a transaction.
4337 : */
4338 :
4339 20650 : if (sigsetjmp(local_sigjmp_buf, 1) != 0)
4340 : {
4341 : /*
4342 : * NOTE: if you are tempted to add more code in this if-block,
4343 : * consider the high probability that it should be in
4344 : * AbortTransaction() instead. The only stuff done directly here
4345 : * should be stuff that is guaranteed to apply *only* for outer-level
4346 : * error recovery, such as adjusting the FE/BE protocol status.
4347 : */
4348 :
4349 : /* Since not using PG_TRY, must reset error stack by hand */
4350 39492 : error_context_stack = NULL;
4351 :
4352 : /* Prevent interrupts while cleaning up */
4353 39492 : HOLD_INTERRUPTS();
4354 :
4355 : /*
4356 : * Forget any pending QueryCancel request, since we're returning to
4357 : * the idle loop anyway, and cancel any active timeout requests. (In
4358 : * future we might want to allow some timeout requests to survive, but
4359 : * at minimum it'd be necessary to do reschedule_timeouts(), in case
4360 : * we got here because of a query cancel interrupting the SIGALRM
4361 : * interrupt handler.) Note in particular that we must clear the
4362 : * statement and lock timeout indicators, to prevent any future plain
4363 : * query cancels from being misreported as timeouts in case we're
4364 : * forgetting a timeout cancel.
4365 : */
4366 39492 : disable_all_timeouts(false); /* do first to avoid race condition */
4367 39492 : QueryCancelPending = false;
4368 39492 : idle_in_transaction_timeout_enabled = false;
4369 39492 : idle_session_timeout_enabled = false;
4370 :
4371 : /* Not reading from the client anymore. */
4372 39492 : DoingCommandRead = false;
4373 :
4374 : /* Make sure libpq is in a good state */
4375 39492 : pq_comm_reset();
4376 :
4377 : /* Report the error to the client and/or server log */
4378 39492 : EmitErrorReport();
4379 :
4380 : /*
4381 : * If Valgrind noticed something during the erroneous query, print the
4382 : * query string, assuming we have one.
4383 : */
4384 : valgrind_report_error_query(debug_query_string);
4385 :
4386 : /*
4387 : * Make sure debug_query_string gets reset before we possibly clobber
4388 : * the storage it points at.
4389 : */
4390 39492 : debug_query_string = NULL;
4391 :
4392 : /*
4393 : * Abort the current transaction in order to recover.
4394 : */
4395 39492 : AbortCurrentTransaction();
4396 :
4397 39492 : if (am_walsender)
4398 94 : WalSndErrorCleanup();
4399 :
4400 39492 : PortalErrorCleanup();
4401 :
4402 : /*
4403 : * We can't release replication slots inside AbortTransaction() as we
4404 : * need to be able to start and abort transactions while having a slot
4405 : * acquired. But we never need to hold them across top level errors,
4406 : * so releasing here is fine. There also is a before_shmem_exit()
4407 : * callback ensuring correct cleanup on FATAL errors.
4408 : */
4409 39492 : if (MyReplicationSlot != NULL)
4410 28 : ReplicationSlotRelease();
4411 :
4412 : /* We also want to cleanup temporary slots on error. */
4413 39492 : ReplicationSlotCleanup();
4414 :
4415 39492 : jit_reset_after_error();
4416 :
4417 : /*
4418 : * Now return to normal top-level context and clear ErrorContext for
4419 : * next time.
4420 : */
4421 39492 : MemoryContextSwitchTo(TopMemoryContext);
4422 39492 : FlushErrorState();
4423 :
4424 : /*
4425 : * If we were handling an extended-query-protocol message, initiate
4426 : * skip till next Sync. This also causes us not to issue
4427 : * ReadyForQuery (until we get Sync).
4428 : */
4429 39492 : if (doing_extended_query_message)
4430 100 : ignore_till_sync = true;
4431 :
4432 : /* We don't have a transaction command open anymore */
4433 39492 : xact_started = false;
4434 :
4435 : /*
4436 : * If an error occurred while we were reading a message from the
4437 : * client, we have potentially lost track of where the previous
4438 : * message ends and the next one begins. Even though we have
4439 : * otherwise recovered from the error, we cannot safely read any more
4440 : * messages from the client, so there isn't much we can do with the
4441 : * connection anymore.
4442 : */
4443 39492 : if (pq_is_reading_msg())
4444 0 : ereport(FATAL,
4445 : (errcode(ERRCODE_PROTOCOL_VIOLATION),
4446 : errmsg("terminating connection because protocol synchronization was lost")));
4447 :
4448 : /* Now we can allow interrupts again */
4449 39492 : RESUME_INTERRUPTS();
4450 : }
4451 :
4452 : /* We can now handle ereport(ERROR) */
4453 60142 : PG_exception_stack = &local_sigjmp_buf;
4454 :
4455 60142 : if (!ignore_till_sync)
4456 60042 : send_ready_for_query = true; /* initially, or after error */
4457 :
4458 : /*
4459 : * Non-error queries loop here.
4460 : */
4461 :
4462 : for (;;)
4463 633264 : {
4464 : int firstchar;
4465 : StringInfoData input_message;
4466 :
4467 : /*
4468 : * At top of loop, reset extended-query-message flag, so that any
4469 : * errors encountered in "idle" state don't provoke skip.
4470 : */
4471 693406 : doing_extended_query_message = false;
4472 :
4473 : /*
4474 : * For valgrind reporting purposes, the "current query" begins here.
4475 : */
4476 : #ifdef USE_VALGRIND
4477 : old_valgrind_error_count = VALGRIND_COUNT_ERRORS;
4478 : #endif
4479 :
4480 : /*
4481 : * Release storage left over from prior query cycle, and create a new
4482 : * query input buffer in the cleared MessageContext.
4483 : */
4484 693406 : MemoryContextSwitchTo(MessageContext);
4485 693406 : MemoryContextReset(MessageContext);
4486 :
4487 693406 : initStringInfo(&input_message);
4488 :
4489 : /*
4490 : * Also consider releasing our catalog snapshot if any, so that it's
4491 : * not preventing advance of global xmin while we wait for the client.
4492 : */
4493 693406 : InvalidateCatalogSnapshotConditionally();
4494 :
4495 : /*
4496 : * (1) If we've reached idle state, tell the frontend we're ready for
4497 : * a new query.
4498 : *
4499 : * Note: this includes fflush()'ing the last of the prior output.
4500 : *
4501 : * This is also a good time to flush out collected statistics to the
4502 : * cumulative stats system, and to update the PS stats display. We
4503 : * avoid doing those every time through the message loop because it'd
4504 : * slow down processing of batched messages, and because we don't want
4505 : * to report uncommitted updates (that confuses autovacuum). The
4506 : * notification processor wants a call too, if we are not in a
4507 : * transaction block.
4508 : *
4509 : * Also, if an idle timeout is enabled, start the timer for that.
4510 : */
4511 693406 : if (send_ready_for_query)
4512 : {
4513 622354 : if (IsAbortedTransactionBlockState())
4514 : {
4515 1718 : set_ps_display("idle in transaction (aborted)");
4516 1718 : pgstat_report_activity(STATE_IDLEINTRANSACTION_ABORTED, NULL);
4517 :
4518 : /* Start the idle-in-transaction timer */
4519 1718 : if (IdleInTransactionSessionTimeout > 0
4520 0 : && (IdleInTransactionSessionTimeout < TransactionTimeout || TransactionTimeout == 0))
4521 : {
4522 0 : idle_in_transaction_timeout_enabled = true;
4523 0 : enable_timeout_after(IDLE_IN_TRANSACTION_SESSION_TIMEOUT,
4524 : IdleInTransactionSessionTimeout);
4525 : }
4526 : }
4527 620636 : else if (IsTransactionOrTransactionBlock())
4528 : {
4529 126424 : set_ps_display("idle in transaction");
4530 126424 : pgstat_report_activity(STATE_IDLEINTRANSACTION, NULL);
4531 :
4532 : /* Start the idle-in-transaction timer */
4533 126424 : if (IdleInTransactionSessionTimeout > 0
4534 0 : && (IdleInTransactionSessionTimeout < TransactionTimeout || TransactionTimeout == 0))
4535 : {
4536 0 : idle_in_transaction_timeout_enabled = true;
4537 0 : enable_timeout_after(IDLE_IN_TRANSACTION_SESSION_TIMEOUT,
4538 : IdleInTransactionSessionTimeout);
4539 : }
4540 : }
4541 : else
4542 : {
4543 : long stats_timeout;
4544 :
4545 : /*
4546 : * Process incoming notifies (including self-notifies), if
4547 : * any, and send relevant messages to the client. Doing it
4548 : * here helps ensure stable behavior in tests: if any notifies
4549 : * were received during the just-finished transaction, they'll
4550 : * be seen by the client before ReadyForQuery is.
4551 : */
4552 494212 : if (notifyInterruptPending)
4553 58 : ProcessNotifyInterrupt(false);
4554 :
4555 : /*
4556 : * Check if we need to report stats. If pgstat_report_stat()
4557 : * decides it's too soon to flush out pending stats / lock
4558 : * contention prevented reporting, it'll tell us when we
4559 : * should try to report stats again (so that stats updates
4560 : * aren't unduly delayed if the connection goes idle for a
4561 : * long time). We only enable the timeout if we don't already
4562 : * have a timeout in progress, because we don't disable the
4563 : * timeout below. enable_timeout_after() needs to determine
4564 : * the current timestamp, which can have a negative
4565 : * performance impact. That's OK because pgstat_report_stat()
4566 : * won't have us wake up sooner than a prior call.
4567 : */
4568 494212 : stats_timeout = pgstat_report_stat(false);
4569 494212 : if (stats_timeout > 0)
4570 : {
4571 466846 : if (!get_timeout_active(IDLE_STATS_UPDATE_TIMEOUT))
4572 59526 : enable_timeout_after(IDLE_STATS_UPDATE_TIMEOUT,
4573 : stats_timeout);
4574 : }
4575 : else
4576 : {
4577 : /* all stats flushed, no need for the timeout */
4578 27366 : if (get_timeout_active(IDLE_STATS_UPDATE_TIMEOUT))
4579 1486 : disable_timeout(IDLE_STATS_UPDATE_TIMEOUT, false);
4580 : }
4581 :
4582 494212 : set_ps_display("idle");
4583 494212 : pgstat_report_activity(STATE_IDLE, NULL);
4584 :
4585 : /* Start the idle-session timer */
4586 494212 : if (IdleSessionTimeout > 0)
4587 : {
4588 0 : idle_session_timeout_enabled = true;
4589 0 : enable_timeout_after(IDLE_SESSION_TIMEOUT,
4590 : IdleSessionTimeout);
4591 : }
4592 : }
4593 :
4594 : /* Report any recently-changed GUC options */
4595 622354 : ReportChangedGUCOptions();
4596 :
4597 622354 : ReadyForQuery(whereToSendOutput);
4598 622354 : send_ready_for_query = false;
4599 : }
4600 :
4601 : /*
4602 : * (2) Allow asynchronous signals to be executed immediately if they
4603 : * come in while we are waiting for client input. (This must be
4604 : * conditional since we don't want, say, reads on behalf of COPY FROM
4605 : * STDIN doing the same thing.)
4606 : */
4607 693406 : DoingCommandRead = true;
4608 :
4609 : /*
4610 : * (3) read a command (loop blocks here)
4611 : */
4612 693406 : firstchar = ReadCommand(&input_message);
4613 :
4614 : /*
4615 : * (4) turn off the idle-in-transaction and idle-session timeouts if
4616 : * active. We do this before step (5) so that any last-moment timeout
4617 : * is certain to be detected in step (5).
4618 : *
4619 : * At most one of these timeouts will be active, so there's no need to
4620 : * worry about combining the timeout.c calls into one.
4621 : */
4622 693340 : if (idle_in_transaction_timeout_enabled)
4623 : {
4624 0 : disable_timeout(IDLE_IN_TRANSACTION_SESSION_TIMEOUT, false);
4625 0 : idle_in_transaction_timeout_enabled = false;
4626 : }
4627 693340 : if (idle_session_timeout_enabled)
4628 : {
4629 0 : disable_timeout(IDLE_SESSION_TIMEOUT, false);
4630 0 : idle_session_timeout_enabled = false;
4631 : }
4632 :
4633 : /*
4634 : * (5) disable async signal conditions again.
4635 : *
4636 : * Query cancel is supposed to be a no-op when there is no query in
4637 : * progress, so if a query cancel arrived while we were idle, just
4638 : * reset QueryCancelPending. ProcessInterrupts() has that effect when
4639 : * it's called when DoingCommandRead is set, so check for interrupts
4640 : * before resetting DoingCommandRead.
4641 : */
4642 693340 : CHECK_FOR_INTERRUPTS();
4643 693336 : DoingCommandRead = false;
4644 :
4645 : /*
4646 : * (6) check for any other interesting events that happened while we
4647 : * slept.
4648 : */
4649 693336 : if (ConfigReloadPending)
4650 : {
4651 20 : ConfigReloadPending = false;
4652 20 : ProcessConfigFile(PGC_SIGHUP);
4653 : }
4654 :
4655 : /*
4656 : * (7) process the command. But ignore it if we're skipping till
4657 : * Sync.
4658 : */
4659 693336 : if (ignore_till_sync && firstchar != EOF)
4660 1206 : continue;
4661 :
4662 692130 : switch (firstchar)
4663 : {
4664 579036 : case PqMsg_Query:
4665 : {
4666 : const char *query_string;
4667 :
4668 : /* Set statement_timestamp() */
4669 579036 : SetCurrentStatementStartTimestamp();
4670 :
4671 579036 : query_string = pq_getmsgstring(&input_message);
4672 579036 : pq_getmsgend(&input_message);
4673 :
4674 579036 : if (am_walsender)
4675 : {
4676 8952 : if (!exec_replication_command(query_string))
4677 3942 : exec_simple_query(query_string);
4678 : }
4679 : else
4680 570084 : exec_simple_query(query_string);
4681 :
4682 : valgrind_report_error_query(query_string);
4683 :
4684 539126 : send_ready_for_query = true;
4685 : }
4686 539126 : break;
4687 :
4688 10072 : case PqMsg_Parse:
4689 : {
4690 : const char *stmt_name;
4691 : const char *query_string;
4692 : int numParams;
4693 10072 : Oid *paramTypes = NULL;
4694 :
4695 10072 : forbidden_in_wal_sender(firstchar);
4696 :
4697 : /* Set statement_timestamp() */
4698 10072 : SetCurrentStatementStartTimestamp();
4699 :
4700 10072 : stmt_name = pq_getmsgstring(&input_message);
4701 10072 : query_string = pq_getmsgstring(&input_message);
4702 10072 : numParams = pq_getmsgint(&input_message, 2);
4703 10072 : if (numParams > 0)
4704 : {
4705 56 : paramTypes = palloc_array(Oid, numParams);
4706 140 : for (int i = 0; i < numParams; i++)
4707 84 : paramTypes[i] = pq_getmsgint(&input_message, 4);
4708 : }
4709 10072 : pq_getmsgend(&input_message);
4710 :
4711 10072 : exec_parse_message(query_string, stmt_name,
4712 : paramTypes, numParams);
4713 :
4714 : valgrind_report_error_query(query_string);
4715 : }
4716 10032 : break;
4717 :
4718 19808 : case PqMsg_Bind:
4719 19808 : forbidden_in_wal_sender(firstchar);
4720 :
4721 : /* Set statement_timestamp() */
4722 19808 : SetCurrentStatementStartTimestamp();
4723 :
4724 : /*
4725 : * this message is complex enough that it seems best to put
4726 : * the field extraction out-of-line
4727 : */
4728 19808 : exec_bind_message(&input_message);
4729 :
4730 : /* exec_bind_message does valgrind_report_error_query */
4731 19796 : break;
4732 :
4733 19796 : case PqMsg_Execute:
4734 : {
4735 : const char *portal_name;
4736 : int max_rows;
4737 :
4738 19796 : forbidden_in_wal_sender(firstchar);
4739 :
4740 : /* Set statement_timestamp() */
4741 19796 : SetCurrentStatementStartTimestamp();
4742 :
4743 19796 : portal_name = pq_getmsgstring(&input_message);
4744 19796 : max_rows = pq_getmsgint(&input_message, 4);
4745 19796 : pq_getmsgend(&input_message);
4746 :
4747 19796 : exec_execute_message(portal_name, max_rows);
4748 :
4749 : /* exec_execute_message does valgrind_report_error_query */
4750 : }
4751 19752 : break;
4752 :
4753 2084 : case PqMsg_FunctionCall:
4754 2084 : forbidden_in_wal_sender(firstchar);
4755 :
4756 : /* Set statement_timestamp() */
4757 2084 : SetCurrentStatementStartTimestamp();
4758 :
4759 : /* Report query to various monitoring facilities. */
4760 2084 : pgstat_report_activity(STATE_FASTPATH, NULL);
4761 2084 : set_ps_display("<FASTPATH>");
4762 :
4763 : /* start an xact for this function invocation */
4764 2084 : start_xact_command();
4765 :
4766 : /*
4767 : * Note: we may at this point be inside an aborted
4768 : * transaction. We can't throw error for that until we've
4769 : * finished reading the function-call message, so
4770 : * HandleFunctionRequest() must check for it after doing so.
4771 : * Be careful not to do anything that assumes we're inside a
4772 : * valid transaction here.
4773 : */
4774 :
4775 : /* switch back to message context */
4776 2084 : MemoryContextSwitchTo(MessageContext);
4777 :
4778 2084 : HandleFunctionRequest(&input_message);
4779 :
4780 : /* commit the function-invocation transaction */
4781 2084 : finish_xact_command();
4782 :
4783 : valgrind_report_error_query("fastpath function call");
4784 :
4785 2084 : send_ready_for_query = true;
4786 2084 : break;
4787 :
4788 8 : case PqMsg_Close:
4789 : {
4790 : int close_type;
4791 : const char *close_target;
4792 :
4793 8 : forbidden_in_wal_sender(firstchar);
4794 :
4795 8 : close_type = pq_getmsgbyte(&input_message);
4796 8 : close_target = pq_getmsgstring(&input_message);
4797 8 : pq_getmsgend(&input_message);
4798 :
4799 : switch (close_type)
4800 : {
4801 4 : case 'S':
4802 4 : if (close_target[0] != '\0')
4803 4 : DropPreparedStatement(close_target, false);
4804 : else
4805 : {
4806 : /* special-case the unnamed statement */
4807 0 : drop_unnamed_stmt();
4808 : }
4809 4 : break;
4810 4 : case 'P':
4811 : {
4812 : Portal portal;
4813 :
4814 4 : portal = GetPortalByName(close_target);
4815 4 : if (PortalIsValid(portal))
4816 2 : PortalDrop(portal, false);
4817 : }
4818 4 : break;
4819 0 : default:
4820 0 : ereport(ERROR,
4821 : (errcode(ERRCODE_PROTOCOL_VIOLATION),
4822 : errmsg("invalid CLOSE message subtype %d",
4823 : close_type)));
4824 : break;
4825 : }
4826 :
4827 8 : if (whereToSendOutput == DestRemote)
4828 8 : pq_putemptymessage(PqMsg_CloseComplete);
4829 :
4830 : valgrind_report_error_query("CLOSE message");
4831 : }
4832 8 : break;
4833 :
4834 19942 : case PqMsg_Describe:
4835 : {
4836 : int describe_type;
4837 : const char *describe_target;
4838 :
4839 19942 : forbidden_in_wal_sender(firstchar);
4840 :
4841 : /* Set statement_timestamp() (needed for xact) */
4842 19942 : SetCurrentStatementStartTimestamp();
4843 :
4844 19942 : describe_type = pq_getmsgbyte(&input_message);
4845 19942 : describe_target = pq_getmsgstring(&input_message);
4846 19942 : pq_getmsgend(&input_message);
4847 :
4848 : switch (describe_type)
4849 : {
4850 142 : case 'S':
4851 142 : exec_describe_statement_message(describe_target);
4852 140 : break;
4853 19800 : case 'P':
4854 19800 : exec_describe_portal_message(describe_target);
4855 19798 : break;
4856 0 : default:
4857 0 : ereport(ERROR,
4858 : (errcode(ERRCODE_PROTOCOL_VIOLATION),
4859 : errmsg("invalid DESCRIBE message subtype %d",
4860 : describe_type)));
4861 : break;
4862 : }
4863 :
4864 : valgrind_report_error_query("DESCRIBE message");
4865 : }
4866 19938 : break;
4867 :
4868 12 : case PqMsg_Flush:
4869 12 : pq_getmsgend(&input_message);
4870 12 : if (whereToSendOutput == DestRemote)
4871 12 : pq_flush();
4872 12 : break;
4873 :
4874 21102 : case PqMsg_Sync:
4875 21102 : pq_getmsgend(&input_message);
4876 21102 : finish_xact_command();
4877 : valgrind_report_error_query("SYNC message");
4878 21102 : send_ready_for_query = true;
4879 21102 : break;
4880 :
4881 : /*
4882 : * 'X' means that the frontend is closing down the socket. EOF
4883 : * means unexpected loss of frontend connection. Either way,
4884 : * perform normal shutdown.
4885 : */
4886 172 : case EOF:
4887 :
4888 : /* for the cumulative statistics system */
4889 172 : pgStatSessionEndCause = DISCONNECT_CLIENT_EOF;
4890 :
4891 : /* FALLTHROUGH */
4892 :
4893 20062 : case PqMsg_Terminate:
4894 :
4895 : /*
4896 : * Reset whereToSendOutput to prevent ereport from attempting
4897 : * to send any more messages to client.
4898 : */
4899 20062 : if (whereToSendOutput == DestRemote)
4900 19898 : whereToSendOutput = DestNone;
4901 :
4902 : /*
4903 : * NOTE: if you are tempted to add more code here, DON'T!
4904 : * Whatever you had in mind to do should be set up as an
4905 : * on_proc_exit or on_shmem_exit callback, instead. Otherwise
4906 : * it will fail to be called during other backend-shutdown
4907 : * scenarios.
4908 : */
4909 20062 : proc_exit(0);
4910 :
4911 208 : case PqMsg_CopyData:
4912 : case PqMsg_CopyDone:
4913 : case PqMsg_CopyFail:
4914 :
4915 : /*
4916 : * Accept but ignore these messages, per protocol spec; we
4917 : * probably got here because a COPY failed, and the frontend
4918 : * is still sending data.
4919 : */
4920 208 : break;
4921 :
4922 0 : default:
4923 0 : ereport(FATAL,
4924 : (errcode(ERRCODE_PROTOCOL_VIOLATION),
4925 : errmsg("invalid frontend message type %d",
4926 : firstchar)));
4927 : }
4928 : } /* end of input-reading loop */
4929 : }
4930 :
4931 : /*
4932 : * Throw an error if we're a WAL sender process.
4933 : *
4934 : * This is used to forbid anything else than simple query protocol messages
4935 : * in a WAL sender process. 'firstchar' specifies what kind of a forbidden
4936 : * message was received, and is used to construct the error message.
4937 : */
4938 : static void
4939 71710 : forbidden_in_wal_sender(char firstchar)
4940 : {
4941 71710 : if (am_walsender)
4942 : {
4943 0 : if (firstchar == PqMsg_FunctionCall)
4944 0 : ereport(ERROR,
4945 : (errcode(ERRCODE_PROTOCOL_VIOLATION),
4946 : errmsg("fastpath function calls not supported in a replication connection")));
4947 : else
4948 0 : ereport(ERROR,
4949 : (errcode(ERRCODE_PROTOCOL_VIOLATION),
4950 : errmsg("extended query protocol not supported in a replication connection")));
4951 : }
4952 71710 : }
4953 :
4954 :
4955 : /*
4956 : * Obtain platform stack depth limit (in bytes)
4957 : *
4958 : * Return -1 if unknown
4959 : */
4960 : long
4961 12338 : get_stack_depth_rlimit(void)
4962 : {
4963 : #if defined(HAVE_GETRLIMIT)
4964 : static long val = 0;
4965 :
4966 : /* This won't change after process launch, so check just once */
4967 12338 : if (val == 0)
4968 : {
4969 : struct rlimit rlim;
4970 :
4971 1830 : if (getrlimit(RLIMIT_STACK, &rlim) < 0)
4972 0 : val = -1;
4973 1830 : else if (rlim.rlim_cur == RLIM_INFINITY)
4974 0 : val = LONG_MAX;
4975 : /* rlim_cur is probably of an unsigned type, so check for overflow */
4976 1830 : else if (rlim.rlim_cur >= LONG_MAX)
4977 0 : val = LONG_MAX;
4978 : else
4979 1830 : val = rlim.rlim_cur;
4980 : }
4981 12338 : return val;
4982 : #else
4983 : /* On Windows we set the backend stack size in src/backend/Makefile */
4984 : return WIN32_STACK_RLIMIT;
4985 : #endif
4986 : }
4987 :
4988 :
4989 : static struct rusage Save_r;
4990 : static struct timeval Save_t;
4991 :
4992 : void
4993 0 : ResetUsage(void)
4994 : {
4995 0 : getrusage(RUSAGE_SELF, &Save_r);
4996 0 : gettimeofday(&Save_t, NULL);
4997 0 : }
4998 :
4999 : void
5000 0 : ShowUsage(const char *title)
5001 : {
5002 : StringInfoData str;
5003 : struct timeval user,
5004 : sys;
5005 : struct timeval elapse_t;
5006 : struct rusage r;
5007 :
5008 0 : getrusage(RUSAGE_SELF, &r);
5009 0 : gettimeofday(&elapse_t, NULL);
5010 0 : memcpy((char *) &user, (char *) &r.ru_utime, sizeof(user));
5011 0 : memcpy((char *) &sys, (char *) &r.ru_stime, sizeof(sys));
5012 0 : if (elapse_t.tv_usec < Save_t.tv_usec)
5013 : {
5014 0 : elapse_t.tv_sec--;
5015 0 : elapse_t.tv_usec += 1000000;
5016 : }
5017 0 : if (r.ru_utime.tv_usec < Save_r.ru_utime.tv_usec)
5018 : {
5019 0 : r.ru_utime.tv_sec--;
5020 0 : r.ru_utime.tv_usec += 1000000;
5021 : }
5022 0 : if (r.ru_stime.tv_usec < Save_r.ru_stime.tv_usec)
5023 : {
5024 0 : r.ru_stime.tv_sec--;
5025 0 : r.ru_stime.tv_usec += 1000000;
5026 : }
5027 :
5028 : /*
5029 : * The only stats we don't show here are ixrss, idrss, isrss. It takes
5030 : * some work to interpret them, and most platforms don't fill them in.
5031 : */
5032 0 : initStringInfo(&str);
5033 :
5034 0 : appendStringInfoString(&str, "! system usage stats:\n");
5035 0 : appendStringInfo(&str,
5036 : "!\t%ld.%06ld s user, %ld.%06ld s system, %ld.%06ld s elapsed\n",
5037 0 : (long) (r.ru_utime.tv_sec - Save_r.ru_utime.tv_sec),
5038 0 : (long) (r.ru_utime.tv_usec - Save_r.ru_utime.tv_usec),
5039 0 : (long) (r.ru_stime.tv_sec - Save_r.ru_stime.tv_sec),
5040 0 : (long) (r.ru_stime.tv_usec - Save_r.ru_stime.tv_usec),
5041 0 : (long) (elapse_t.tv_sec - Save_t.tv_sec),
5042 0 : (long) (elapse_t.tv_usec - Save_t.tv_usec));
5043 0 : appendStringInfo(&str,
5044 : "!\t[%ld.%06ld s user, %ld.%06ld s system total]\n",
5045 0 : (long) user.tv_sec,
5046 0 : (long) user.tv_usec,
5047 0 : (long) sys.tv_sec,
5048 0 : (long) sys.tv_usec);
5049 : #ifndef WIN32
5050 :
5051 : /*
5052 : * The following rusage fields are not defined by POSIX, but they're
5053 : * present on all current Unix-like systems so we use them without any
5054 : * special checks. Some of these could be provided in our Windows
5055 : * emulation in src/port/win32getrusage.c with more work.
5056 : */
5057 0 : appendStringInfo(&str,
5058 : "!\t%ld kB max resident size\n",
5059 : #if defined(__darwin__)
5060 : /* in bytes on macOS */
5061 : r.ru_maxrss / 1024
5062 : #else
5063 : /* in kilobytes on most other platforms */
5064 : r.ru_maxrss
5065 : #endif
5066 : );
5067 0 : appendStringInfo(&str,
5068 : "!\t%ld/%ld [%ld/%ld] filesystem blocks in/out\n",
5069 0 : r.ru_inblock - Save_r.ru_inblock,
5070 : /* they only drink coffee at dec */
5071 0 : r.ru_oublock - Save_r.ru_oublock,
5072 : r.ru_inblock, r.ru_oublock);
5073 0 : appendStringInfo(&str,
5074 : "!\t%ld/%ld [%ld/%ld] page faults/reclaims, %ld [%ld] swaps\n",
5075 0 : r.ru_majflt - Save_r.ru_majflt,
5076 0 : r.ru_minflt - Save_r.ru_minflt,
5077 : r.ru_majflt, r.ru_minflt,
5078 0 : r.ru_nswap - Save_r.ru_nswap,
5079 : r.ru_nswap);
5080 0 : appendStringInfo(&str,
5081 : "!\t%ld [%ld] signals rcvd, %ld/%ld [%ld/%ld] messages rcvd/sent\n",
5082 0 : r.ru_nsignals - Save_r.ru_nsignals,
5083 : r.ru_nsignals,
5084 0 : r.ru_msgrcv - Save_r.ru_msgrcv,
5085 0 : r.ru_msgsnd - Save_r.ru_msgsnd,
5086 : r.ru_msgrcv, r.ru_msgsnd);
5087 0 : appendStringInfo(&str,
5088 : "!\t%ld/%ld [%ld/%ld] voluntary/involuntary context switches\n",
5089 0 : r.ru_nvcsw - Save_r.ru_nvcsw,
5090 0 : r.ru_nivcsw - Save_r.ru_nivcsw,
5091 : r.ru_nvcsw, r.ru_nivcsw);
5092 : #endif /* !WIN32 */
5093 :
5094 : /* remove trailing newline */
5095 0 : if (str.data[str.len - 1] == '\n')
5096 0 : str.data[--str.len] = '\0';
5097 :
5098 0 : ereport(LOG,
5099 : (errmsg_internal("%s", title),
5100 : errdetail_internal("%s", str.data)));
5101 :
5102 0 : pfree(str.data);
5103 0 : }
5104 :
5105 : /*
5106 : * on_proc_exit handler to log end of session
5107 : */
5108 : static void
5109 16 : log_disconnections(int code, Datum arg)
5110 : {
5111 16 : Port *port = MyProcPort;
5112 : long secs;
5113 : int usecs;
5114 : int msecs;
5115 : int hours,
5116 : minutes,
5117 : seconds;
5118 :
5119 16 : TimestampDifference(MyStartTimestamp,
5120 : GetCurrentTimestamp(),
5121 : &secs, &usecs);
5122 16 : msecs = usecs / 1000;
5123 :
5124 16 : hours = secs / SECS_PER_HOUR;
5125 16 : secs %= SECS_PER_HOUR;
5126 16 : minutes = secs / SECS_PER_MINUTE;
5127 16 : seconds = secs % SECS_PER_MINUTE;
5128 :
5129 16 : ereport(LOG,
5130 : (errmsg("disconnection: session time: %d:%02d:%02d.%03d "
5131 : "user=%s database=%s host=%s%s%s",
5132 : hours, minutes, seconds, msecs,
5133 : port->user_name, port->database_name, port->remote_host,
5134 : port->remote_port[0] ? " port=" : "", port->remote_port)));
5135 16 : }
5136 :
5137 : /*
5138 : * Start statement timeout timer, if enabled.
5139 : *
5140 : * If there's already a timeout running, don't restart the timer. That
5141 : * enables compromises between accuracy of timeouts and cost of starting a
5142 : * timeout.
5143 : */
5144 : static void
5145 1257302 : enable_statement_timeout(void)
5146 : {
5147 : /* must be within an xact */
5148 : Assert(xact_started);
5149 :
5150 1257302 : if (StatementTimeout > 0
5151 60 : && (StatementTimeout < TransactionTimeout || TransactionTimeout == 0))
5152 : {
5153 60 : if (!get_timeout_active(STATEMENT_TIMEOUT))
5154 30 : enable_timeout_after(STATEMENT_TIMEOUT, StatementTimeout);
5155 : }
5156 : else
5157 : {
5158 1257242 : if (get_timeout_active(STATEMENT_TIMEOUT))
5159 0 : disable_timeout(STATEMENT_TIMEOUT, false);
5160 : }
5161 1257302 : }
5162 :
5163 : /*
5164 : * Disable statement timeout, if active.
5165 : */
5166 : static void
5167 1151626 : disable_statement_timeout(void)
5168 : {
5169 1151626 : if (get_timeout_active(STATEMENT_TIMEOUT))
5170 14 : disable_timeout(STATEMENT_TIMEOUT, false);
5171 1151626 : }
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