Line data Source code
1 : /*-------------------------------------------------------------------------
2 : *
3 : * subscriptioncmds.c
4 : * subscription catalog manipulation functions
5 : *
6 : * Portions Copyright (c) 1996-2024, PostgreSQL Global Development Group
7 : * Portions Copyright (c) 1994, Regents of the University of California
8 : *
9 : * IDENTIFICATION
10 : * src/backend/commands/subscriptioncmds.c
11 : *
12 : *-------------------------------------------------------------------------
13 : */
14 :
15 : #include "postgres.h"
16 :
17 : #include "access/htup_details.h"
18 : #include "access/table.h"
19 : #include "access/xact.h"
20 : #include "catalog/catalog.h"
21 : #include "catalog/dependency.h"
22 : #include "catalog/indexing.h"
23 : #include "catalog/namespace.h"
24 : #include "catalog/objectaccess.h"
25 : #include "catalog/objectaddress.h"
26 : #include "catalog/pg_authid_d.h"
27 : #include "catalog/pg_database_d.h"
28 : #include "catalog/pg_subscription.h"
29 : #include "catalog/pg_subscription_rel.h"
30 : #include "catalog/pg_type.h"
31 : #include "commands/dbcommands.h"
32 : #include "commands/defrem.h"
33 : #include "commands/event_trigger.h"
34 : #include "commands/subscriptioncmds.h"
35 : #include "executor/executor.h"
36 : #include "miscadmin.h"
37 : #include "nodes/makefuncs.h"
38 : #include "pgstat.h"
39 : #include "replication/logicallauncher.h"
40 : #include "replication/logicalworker.h"
41 : #include "replication/origin.h"
42 : #include "replication/slot.h"
43 : #include "replication/walreceiver.h"
44 : #include "replication/walsender.h"
45 : #include "replication/worker_internal.h"
46 : #include "storage/lmgr.h"
47 : #include "utils/acl.h"
48 : #include "utils/builtins.h"
49 : #include "utils/guc.h"
50 : #include "utils/lsyscache.h"
51 : #include "utils/memutils.h"
52 : #include "utils/pg_lsn.h"
53 : #include "utils/syscache.h"
54 :
55 : /*
56 : * Options that can be specified by the user in CREATE/ALTER SUBSCRIPTION
57 : * command.
58 : */
59 : #define SUBOPT_CONNECT 0x00000001
60 : #define SUBOPT_ENABLED 0x00000002
61 : #define SUBOPT_CREATE_SLOT 0x00000004
62 : #define SUBOPT_SLOT_NAME 0x00000008
63 : #define SUBOPT_COPY_DATA 0x00000010
64 : #define SUBOPT_SYNCHRONOUS_COMMIT 0x00000020
65 : #define SUBOPT_REFRESH 0x00000040
66 : #define SUBOPT_BINARY 0x00000080
67 : #define SUBOPT_STREAMING 0x00000100
68 : #define SUBOPT_TWOPHASE_COMMIT 0x00000200
69 : #define SUBOPT_DISABLE_ON_ERR 0x00000400
70 : #define SUBOPT_PASSWORD_REQUIRED 0x00000800
71 : #define SUBOPT_RUN_AS_OWNER 0x00001000
72 : #define SUBOPT_FAILOVER 0x00002000
73 : #define SUBOPT_LSN 0x00004000
74 : #define SUBOPT_ORIGIN 0x00008000
75 :
76 : /* check if the 'val' has 'bits' set */
77 : #define IsSet(val, bits) (((val) & (bits)) == (bits))
78 :
79 : /*
80 : * Structure to hold a bitmap representing the user-provided CREATE/ALTER
81 : * SUBSCRIPTION command options and the parsed/default values of each of them.
82 : */
83 : typedef struct SubOpts
84 : {
85 : bits32 specified_opts;
86 : char *slot_name;
87 : char *synchronous_commit;
88 : bool connect;
89 : bool enabled;
90 : bool create_slot;
91 : bool copy_data;
92 : bool refresh;
93 : bool binary;
94 : char streaming;
95 : bool twophase;
96 : bool disableonerr;
97 : bool passwordrequired;
98 : bool runasowner;
99 : bool failover;
100 : char *origin;
101 : XLogRecPtr lsn;
102 : } SubOpts;
103 :
104 : static List *fetch_table_list(WalReceiverConn *wrconn, List *publications);
105 : static void check_publications_origin(WalReceiverConn *wrconn,
106 : List *publications, bool copydata,
107 : char *origin, Oid *subrel_local_oids,
108 : int subrel_count, char *subname);
109 : static void check_duplicates_in_publist(List *publist, Datum *datums);
110 : static List *merge_publications(List *oldpublist, List *newpublist, bool addpub, const char *subname);
111 : static void ReportSlotConnectionError(List *rstates, Oid subid, char *slotname, char *err);
112 :
113 :
114 : /*
115 : * Common option parsing function for CREATE and ALTER SUBSCRIPTION commands.
116 : *
117 : * Since not all options can be specified in both commands, this function
118 : * will report an error if mutually exclusive options are specified.
119 : */
120 : static void
121 824 : parse_subscription_options(ParseState *pstate, List *stmt_options,
122 : bits32 supported_opts, SubOpts *opts)
123 : {
124 : ListCell *lc;
125 :
126 : /* Start out with cleared opts. */
127 824 : memset(opts, 0, sizeof(SubOpts));
128 :
129 : /* caller must expect some option */
130 : Assert(supported_opts != 0);
131 :
132 : /* If connect option is supported, these others also need to be. */
133 : Assert(!IsSet(supported_opts, SUBOPT_CONNECT) ||
134 : IsSet(supported_opts, SUBOPT_ENABLED | SUBOPT_CREATE_SLOT |
135 : SUBOPT_COPY_DATA));
136 :
137 : /* Set default values for the supported options. */
138 824 : if (IsSet(supported_opts, SUBOPT_CONNECT))
139 416 : opts->connect = true;
140 824 : if (IsSet(supported_opts, SUBOPT_ENABLED))
141 486 : opts->enabled = true;
142 824 : if (IsSet(supported_opts, SUBOPT_CREATE_SLOT))
143 416 : opts->create_slot = true;
144 824 : if (IsSet(supported_opts, SUBOPT_COPY_DATA))
145 546 : opts->copy_data = true;
146 824 : if (IsSet(supported_opts, SUBOPT_REFRESH))
147 82 : opts->refresh = true;
148 824 : if (IsSet(supported_opts, SUBOPT_BINARY))
149 600 : opts->binary = false;
150 824 : if (IsSet(supported_opts, SUBOPT_STREAMING))
151 600 : opts->streaming = LOGICALREP_STREAM_OFF;
152 824 : if (IsSet(supported_opts, SUBOPT_TWOPHASE_COMMIT))
153 416 : opts->twophase = false;
154 824 : if (IsSet(supported_opts, SUBOPT_DISABLE_ON_ERR))
155 600 : opts->disableonerr = false;
156 824 : if (IsSet(supported_opts, SUBOPT_PASSWORD_REQUIRED))
157 600 : opts->passwordrequired = true;
158 824 : if (IsSet(supported_opts, SUBOPT_RUN_AS_OWNER))
159 600 : opts->runasowner = false;
160 824 : if (IsSet(supported_opts, SUBOPT_FAILOVER))
161 600 : opts->failover = false;
162 824 : if (IsSet(supported_opts, SUBOPT_ORIGIN))
163 600 : opts->origin = pstrdup(LOGICALREP_ORIGIN_ANY);
164 :
165 : /* Parse options */
166 1608 : foreach(lc, stmt_options)
167 : {
168 844 : DefElem *defel = (DefElem *) lfirst(lc);
169 :
170 844 : if (IsSet(supported_opts, SUBOPT_CONNECT) &&
171 492 : strcmp(defel->defname, "connect") == 0)
172 : {
173 162 : if (IsSet(opts->specified_opts, SUBOPT_CONNECT))
174 0 : errorConflictingDefElem(defel, pstate);
175 :
176 162 : opts->specified_opts |= SUBOPT_CONNECT;
177 162 : opts->connect = defGetBoolean(defel);
178 : }
179 682 : else if (IsSet(supported_opts, SUBOPT_ENABLED) &&
180 400 : strcmp(defel->defname, "enabled") == 0)
181 : {
182 106 : if (IsSet(opts->specified_opts, SUBOPT_ENABLED))
183 0 : errorConflictingDefElem(defel, pstate);
184 :
185 106 : opts->specified_opts |= SUBOPT_ENABLED;
186 106 : opts->enabled = defGetBoolean(defel);
187 : }
188 576 : else if (IsSet(supported_opts, SUBOPT_CREATE_SLOT) &&
189 294 : strcmp(defel->defname, "create_slot") == 0)
190 : {
191 40 : if (IsSet(opts->specified_opts, SUBOPT_CREATE_SLOT))
192 0 : errorConflictingDefElem(defel, pstate);
193 :
194 40 : opts->specified_opts |= SUBOPT_CREATE_SLOT;
195 40 : opts->create_slot = defGetBoolean(defel);
196 : }
197 536 : else if (IsSet(supported_opts, SUBOPT_SLOT_NAME) &&
198 440 : strcmp(defel->defname, "slot_name") == 0)
199 : {
200 142 : if (IsSet(opts->specified_opts, SUBOPT_SLOT_NAME))
201 0 : errorConflictingDefElem(defel, pstate);
202 :
203 142 : opts->specified_opts |= SUBOPT_SLOT_NAME;
204 142 : opts->slot_name = defGetString(defel);
205 :
206 : /* Setting slot_name = NONE is treated as no slot name. */
207 142 : if (strcmp(opts->slot_name, "none") == 0)
208 108 : opts->slot_name = NULL;
209 : else
210 34 : ReplicationSlotValidateName(opts->slot_name, ERROR);
211 : }
212 394 : else if (IsSet(supported_opts, SUBOPT_COPY_DATA) &&
213 248 : strcmp(defel->defname, "copy_data") == 0)
214 : {
215 40 : if (IsSet(opts->specified_opts, SUBOPT_COPY_DATA))
216 0 : errorConflictingDefElem(defel, pstate);
217 :
218 40 : opts->specified_opts |= SUBOPT_COPY_DATA;
219 40 : opts->copy_data = defGetBoolean(defel);
220 : }
221 354 : else if (IsSet(supported_opts, SUBOPT_SYNCHRONOUS_COMMIT) &&
222 264 : strcmp(defel->defname, "synchronous_commit") == 0)
223 : {
224 12 : if (IsSet(opts->specified_opts, SUBOPT_SYNCHRONOUS_COMMIT))
225 0 : errorConflictingDefElem(defel, pstate);
226 :
227 12 : opts->specified_opts |= SUBOPT_SYNCHRONOUS_COMMIT;
228 12 : opts->synchronous_commit = defGetString(defel);
229 :
230 : /* Test if the given value is valid for synchronous_commit GUC. */
231 12 : (void) set_config_option("synchronous_commit", opts->synchronous_commit,
232 : PGC_BACKEND, PGC_S_TEST, GUC_ACTION_SET,
233 : false, 0, false);
234 : }
235 342 : else if (IsSet(supported_opts, SUBOPT_REFRESH) &&
236 66 : strcmp(defel->defname, "refresh") == 0)
237 : {
238 66 : if (IsSet(opts->specified_opts, SUBOPT_REFRESH))
239 0 : errorConflictingDefElem(defel, pstate);
240 :
241 66 : opts->specified_opts |= SUBOPT_REFRESH;
242 66 : opts->refresh = defGetBoolean(defel);
243 : }
244 276 : else if (IsSet(supported_opts, SUBOPT_BINARY) &&
245 252 : strcmp(defel->defname, "binary") == 0)
246 : {
247 32 : if (IsSet(opts->specified_opts, SUBOPT_BINARY))
248 0 : errorConflictingDefElem(defel, pstate);
249 :
250 32 : opts->specified_opts |= SUBOPT_BINARY;
251 32 : opts->binary = defGetBoolean(defel);
252 : }
253 244 : else if (IsSet(supported_opts, SUBOPT_STREAMING) &&
254 220 : strcmp(defel->defname, "streaming") == 0)
255 : {
256 62 : if (IsSet(opts->specified_opts, SUBOPT_STREAMING))
257 0 : errorConflictingDefElem(defel, pstate);
258 :
259 62 : opts->specified_opts |= SUBOPT_STREAMING;
260 62 : opts->streaming = defGetStreamingMode(defel);
261 : }
262 182 : else if (strcmp(defel->defname, "two_phase") == 0)
263 : {
264 : /*
265 : * Do not allow toggling of two_phase option. Doing so could cause
266 : * missing of transactions and lead to an inconsistent replica.
267 : * See comments atop worker.c
268 : *
269 : * Note: Unsupported twophase indicates that this call originated
270 : * from AlterSubscription.
271 : */
272 38 : if (!IsSet(supported_opts, SUBOPT_TWOPHASE_COMMIT))
273 6 : ereport(ERROR,
274 : (errcode(ERRCODE_SYNTAX_ERROR),
275 : errmsg("unrecognized subscription parameter: \"%s\"", defel->defname)));
276 :
277 32 : if (IsSet(opts->specified_opts, SUBOPT_TWOPHASE_COMMIT))
278 0 : errorConflictingDefElem(defel, pstate);
279 :
280 32 : opts->specified_opts |= SUBOPT_TWOPHASE_COMMIT;
281 32 : opts->twophase = defGetBoolean(defel);
282 : }
283 144 : else if (IsSet(supported_opts, SUBOPT_DISABLE_ON_ERR) &&
284 120 : strcmp(defel->defname, "disable_on_error") == 0)
285 : {
286 20 : if (IsSet(opts->specified_opts, SUBOPT_DISABLE_ON_ERR))
287 0 : errorConflictingDefElem(defel, pstate);
288 :
289 20 : opts->specified_opts |= SUBOPT_DISABLE_ON_ERR;
290 20 : opts->disableonerr = defGetBoolean(defel);
291 : }
292 124 : else if (IsSet(supported_opts, SUBOPT_PASSWORD_REQUIRED) &&
293 100 : strcmp(defel->defname, "password_required") == 0)
294 : {
295 24 : if (IsSet(opts->specified_opts, SUBOPT_PASSWORD_REQUIRED))
296 0 : errorConflictingDefElem(defel, pstate);
297 :
298 24 : opts->specified_opts |= SUBOPT_PASSWORD_REQUIRED;
299 24 : opts->passwordrequired = defGetBoolean(defel);
300 : }
301 100 : else if (IsSet(supported_opts, SUBOPT_RUN_AS_OWNER) &&
302 76 : strcmp(defel->defname, "run_as_owner") == 0)
303 : {
304 18 : if (IsSet(opts->specified_opts, SUBOPT_RUN_AS_OWNER))
305 0 : errorConflictingDefElem(defel, pstate);
306 :
307 18 : opts->specified_opts |= SUBOPT_RUN_AS_OWNER;
308 18 : opts->runasowner = defGetBoolean(defel);
309 : }
310 82 : else if (IsSet(supported_opts, SUBOPT_FAILOVER) &&
311 58 : strcmp(defel->defname, "failover") == 0)
312 : {
313 22 : if (IsSet(opts->specified_opts, SUBOPT_FAILOVER))
314 0 : errorConflictingDefElem(defel, pstate);
315 :
316 22 : opts->specified_opts |= SUBOPT_FAILOVER;
317 22 : opts->failover = defGetBoolean(defel);
318 : }
319 60 : else if (IsSet(supported_opts, SUBOPT_ORIGIN) &&
320 36 : strcmp(defel->defname, "origin") == 0)
321 : {
322 30 : if (IsSet(opts->specified_opts, SUBOPT_ORIGIN))
323 0 : errorConflictingDefElem(defel, pstate);
324 :
325 30 : opts->specified_opts |= SUBOPT_ORIGIN;
326 30 : pfree(opts->origin);
327 :
328 : /*
329 : * Even though the "origin" parameter allows only "none" and "any"
330 : * values, it is implemented as a string type so that the
331 : * parameter can be extended in future versions to support
332 : * filtering using origin names specified by the user.
333 : */
334 30 : opts->origin = defGetString(defel);
335 :
336 44 : if ((pg_strcasecmp(opts->origin, LOGICALREP_ORIGIN_NONE) != 0) &&
337 14 : (pg_strcasecmp(opts->origin, LOGICALREP_ORIGIN_ANY) != 0))
338 6 : ereport(ERROR,
339 : errcode(ERRCODE_INVALID_PARAMETER_VALUE),
340 : errmsg("unrecognized origin value: \"%s\"", opts->origin));
341 : }
342 30 : else if (IsSet(supported_opts, SUBOPT_LSN) &&
343 24 : strcmp(defel->defname, "lsn") == 0)
344 18 : {
345 24 : char *lsn_str = defGetString(defel);
346 : XLogRecPtr lsn;
347 :
348 24 : if (IsSet(opts->specified_opts, SUBOPT_LSN))
349 0 : errorConflictingDefElem(defel, pstate);
350 :
351 : /* Setting lsn = NONE is treated as resetting LSN */
352 24 : if (strcmp(lsn_str, "none") == 0)
353 6 : lsn = InvalidXLogRecPtr;
354 : else
355 : {
356 : /* Parse the argument as LSN */
357 18 : lsn = DatumGetLSN(DirectFunctionCall1(pg_lsn_in,
358 : CStringGetDatum(lsn_str)));
359 :
360 18 : if (XLogRecPtrIsInvalid(lsn))
361 6 : ereport(ERROR,
362 : (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
363 : errmsg("invalid WAL location (LSN): %s", lsn_str)));
364 : }
365 :
366 18 : opts->specified_opts |= SUBOPT_LSN;
367 18 : opts->lsn = lsn;
368 : }
369 : else
370 6 : ereport(ERROR,
371 : (errcode(ERRCODE_SYNTAX_ERROR),
372 : errmsg("unrecognized subscription parameter: \"%s\"", defel->defname)));
373 : }
374 :
375 : /*
376 : * We've been explicitly asked to not connect, that requires some
377 : * additional processing.
378 : */
379 764 : if (!opts->connect && IsSet(supported_opts, SUBOPT_CONNECT))
380 : {
381 : /* Check for incompatible options from the user. */
382 132 : if (opts->enabled &&
383 132 : IsSet(opts->specified_opts, SUBOPT_ENABLED))
384 6 : ereport(ERROR,
385 : (errcode(ERRCODE_SYNTAX_ERROR),
386 : /*- translator: both %s are strings of the form "option = value" */
387 : errmsg("%s and %s are mutually exclusive options",
388 : "connect = false", "enabled = true")));
389 :
390 126 : if (opts->create_slot &&
391 120 : IsSet(opts->specified_opts, SUBOPT_CREATE_SLOT))
392 6 : ereport(ERROR,
393 : (errcode(ERRCODE_SYNTAX_ERROR),
394 : errmsg("%s and %s are mutually exclusive options",
395 : "connect = false", "create_slot = true")));
396 :
397 120 : if (opts->copy_data &&
398 114 : IsSet(opts->specified_opts, SUBOPT_COPY_DATA))
399 6 : ereport(ERROR,
400 : (errcode(ERRCODE_SYNTAX_ERROR),
401 : errmsg("%s and %s are mutually exclusive options",
402 : "connect = false", "copy_data = true")));
403 :
404 : /* Change the defaults of other options. */
405 114 : opts->enabled = false;
406 114 : opts->create_slot = false;
407 114 : opts->copy_data = false;
408 : }
409 :
410 : /*
411 : * Do additional checking for disallowed combination when slot_name = NONE
412 : * was used.
413 : */
414 746 : if (!opts->slot_name &&
415 718 : IsSet(opts->specified_opts, SUBOPT_SLOT_NAME))
416 : {
417 102 : if (opts->enabled)
418 : {
419 18 : if (IsSet(opts->specified_opts, SUBOPT_ENABLED))
420 6 : ereport(ERROR,
421 : (errcode(ERRCODE_SYNTAX_ERROR),
422 : /*- translator: both %s are strings of the form "option = value" */
423 : errmsg("%s and %s are mutually exclusive options",
424 : "slot_name = NONE", "enabled = true")));
425 : else
426 12 : ereport(ERROR,
427 : (errcode(ERRCODE_SYNTAX_ERROR),
428 : /*- translator: both %s are strings of the form "option = value" */
429 : errmsg("subscription with %s must also set %s",
430 : "slot_name = NONE", "enabled = false")));
431 : }
432 :
433 84 : if (opts->create_slot)
434 : {
435 12 : if (IsSet(opts->specified_opts, SUBOPT_CREATE_SLOT))
436 6 : ereport(ERROR,
437 : (errcode(ERRCODE_SYNTAX_ERROR),
438 : /*- translator: both %s are strings of the form "option = value" */
439 : errmsg("%s and %s are mutually exclusive options",
440 : "slot_name = NONE", "create_slot = true")));
441 : else
442 6 : ereport(ERROR,
443 : (errcode(ERRCODE_SYNTAX_ERROR),
444 : /*- translator: both %s are strings of the form "option = value" */
445 : errmsg("subscription with %s must also set %s",
446 : "slot_name = NONE", "create_slot = false")));
447 : }
448 : }
449 716 : }
450 :
451 : /*
452 : * Add publication names from the list to a string.
453 : */
454 : static void
455 492 : get_publications_str(List *publications, StringInfo dest, bool quote_literal)
456 : {
457 : ListCell *lc;
458 492 : bool first = true;
459 :
460 : Assert(publications != NIL);
461 :
462 1140 : foreach(lc, publications)
463 : {
464 648 : char *pubname = strVal(lfirst(lc));
465 :
466 648 : if (first)
467 492 : first = false;
468 : else
469 156 : appendStringInfoString(dest, ", ");
470 :
471 648 : if (quote_literal)
472 636 : appendStringInfoString(dest, quote_literal_cstr(pubname));
473 : else
474 : {
475 12 : appendStringInfoChar(dest, '"');
476 12 : appendStringInfoString(dest, pubname);
477 12 : appendStringInfoChar(dest, '"');
478 : }
479 : }
480 492 : }
481 :
482 : /*
483 : * Check that the specified publications are present on the publisher.
484 : */
485 : static void
486 214 : check_publications(WalReceiverConn *wrconn, List *publications)
487 : {
488 : WalRcvExecResult *res;
489 : StringInfo cmd;
490 : TupleTableSlot *slot;
491 214 : List *publicationsCopy = NIL;
492 214 : Oid tableRow[1] = {TEXTOID};
493 :
494 214 : cmd = makeStringInfo();
495 214 : appendStringInfoString(cmd, "SELECT t.pubname FROM\n"
496 : " pg_catalog.pg_publication t WHERE\n"
497 : " t.pubname IN (");
498 214 : get_publications_str(publications, cmd, true);
499 214 : appendStringInfoChar(cmd, ')');
500 :
501 214 : res = walrcv_exec(wrconn, cmd->data, 1, tableRow);
502 214 : destroyStringInfo(cmd);
503 :
504 214 : if (res->status != WALRCV_OK_TUPLES)
505 0 : ereport(ERROR,
506 : errmsg("could not receive list of publications from the publisher: %s",
507 : res->err));
508 :
509 214 : publicationsCopy = list_copy(publications);
510 :
511 : /* Process publication(s). */
512 214 : slot = MakeSingleTupleTableSlot(res->tupledesc, &TTSOpsMinimalTuple);
513 480 : while (tuplestore_gettupleslot(res->tuplestore, true, false, slot))
514 : {
515 : char *pubname;
516 : bool isnull;
517 :
518 266 : pubname = TextDatumGetCString(slot_getattr(slot, 1, &isnull));
519 : Assert(!isnull);
520 :
521 : /* Delete the publication present in publisher from the list. */
522 266 : publicationsCopy = list_delete(publicationsCopy, makeString(pubname));
523 266 : ExecClearTuple(slot);
524 : }
525 :
526 214 : ExecDropSingleTupleTableSlot(slot);
527 :
528 214 : walrcv_clear_result(res);
529 :
530 214 : if (list_length(publicationsCopy))
531 : {
532 : /* Prepare the list of non-existent publication(s) for error message. */
533 6 : StringInfo pubnames = makeStringInfo();
534 :
535 6 : get_publications_str(publicationsCopy, pubnames, false);
536 6 : ereport(WARNING,
537 : errcode(ERRCODE_UNDEFINED_OBJECT),
538 : errmsg_plural("publication %s does not exist on the publisher",
539 : "publications %s do not exist on the publisher",
540 : list_length(publicationsCopy),
541 : pubnames->data));
542 : }
543 214 : }
544 :
545 : /*
546 : * Auxiliary function to build a text array out of a list of String nodes.
547 : */
548 : static Datum
549 336 : publicationListToArray(List *publist)
550 : {
551 : ArrayType *arr;
552 : Datum *datums;
553 : MemoryContext memcxt;
554 : MemoryContext oldcxt;
555 :
556 : /* Create memory context for temporary allocations. */
557 336 : memcxt = AllocSetContextCreate(CurrentMemoryContext,
558 : "publicationListToArray to array",
559 : ALLOCSET_DEFAULT_SIZES);
560 336 : oldcxt = MemoryContextSwitchTo(memcxt);
561 :
562 336 : datums = (Datum *) palloc(sizeof(Datum) * list_length(publist));
563 :
564 336 : check_duplicates_in_publist(publist, datums);
565 :
566 330 : MemoryContextSwitchTo(oldcxt);
567 :
568 330 : arr = construct_array_builtin(datums, list_length(publist), TEXTOID);
569 :
570 330 : MemoryContextDelete(memcxt);
571 :
572 330 : return PointerGetDatum(arr);
573 : }
574 :
575 : /*
576 : * Create new subscription.
577 : */
578 : ObjectAddress
579 416 : CreateSubscription(ParseState *pstate, CreateSubscriptionStmt *stmt,
580 : bool isTopLevel)
581 : {
582 : Relation rel;
583 : ObjectAddress myself;
584 : Oid subid;
585 : bool nulls[Natts_pg_subscription];
586 : Datum values[Natts_pg_subscription];
587 416 : Oid owner = GetUserId();
588 : HeapTuple tup;
589 : char *conninfo;
590 : char originname[NAMEDATALEN];
591 : List *publications;
592 : bits32 supported_opts;
593 416 : SubOpts opts = {0};
594 : AclResult aclresult;
595 :
596 : /*
597 : * Parse and check options.
598 : *
599 : * Connection and publication should not be specified here.
600 : */
601 416 : supported_opts = (SUBOPT_CONNECT | SUBOPT_ENABLED | SUBOPT_CREATE_SLOT |
602 : SUBOPT_SLOT_NAME | SUBOPT_COPY_DATA |
603 : SUBOPT_SYNCHRONOUS_COMMIT | SUBOPT_BINARY |
604 : SUBOPT_STREAMING | SUBOPT_TWOPHASE_COMMIT |
605 : SUBOPT_DISABLE_ON_ERR | SUBOPT_PASSWORD_REQUIRED |
606 : SUBOPT_RUN_AS_OWNER | SUBOPT_FAILOVER | SUBOPT_ORIGIN);
607 416 : parse_subscription_options(pstate, stmt->options, supported_opts, &opts);
608 :
609 : /*
610 : * Since creating a replication slot is not transactional, rolling back
611 : * the transaction leaves the created replication slot. So we cannot run
612 : * CREATE SUBSCRIPTION inside a transaction block if creating a
613 : * replication slot.
614 : */
615 338 : if (opts.create_slot)
616 214 : PreventInTransactionBlock(isTopLevel, "CREATE SUBSCRIPTION ... WITH (create_slot = true)");
617 :
618 : /*
619 : * We don't want to allow unprivileged users to be able to trigger
620 : * attempts to access arbitrary network destinations, so require the user
621 : * to have been specifically authorized to create subscriptions.
622 : */
623 332 : if (!has_privs_of_role(owner, ROLE_PG_CREATE_SUBSCRIPTION))
624 6 : ereport(ERROR,
625 : (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
626 : errmsg("permission denied to create subscription"),
627 : errdetail("Only roles with privileges of the \"%s\" role may create subscriptions.",
628 : "pg_create_subscription")));
629 :
630 : /*
631 : * Since a subscription is a database object, we also check for CREATE
632 : * permission on the database.
633 : */
634 326 : aclresult = object_aclcheck(DatabaseRelationId, MyDatabaseId,
635 : owner, ACL_CREATE);
636 326 : if (aclresult != ACLCHECK_OK)
637 12 : aclcheck_error(aclresult, OBJECT_DATABASE,
638 6 : get_database_name(MyDatabaseId));
639 :
640 : /*
641 : * Non-superusers are required to set a password for authentication, and
642 : * that password must be used by the target server, but the superuser can
643 : * exempt a subscription from this requirement.
644 : */
645 320 : if (!opts.passwordrequired && !superuser_arg(owner))
646 6 : ereport(ERROR,
647 : (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
648 : errmsg("password_required=false is superuser-only"),
649 : errhint("Subscriptions with the password_required option set to false may only be created or modified by the superuser.")));
650 :
651 : /*
652 : * If built with appropriate switch, whine when regression-testing
653 : * conventions for subscription names are violated.
654 : */
655 : #ifdef ENFORCE_REGRESSION_TEST_NAME_RESTRICTIONS
656 : if (strncmp(stmt->subname, "regress_", 8) != 0)
657 : elog(WARNING, "subscriptions created by regression test cases should have names starting with \"regress_\"");
658 : #endif
659 :
660 314 : rel = table_open(SubscriptionRelationId, RowExclusiveLock);
661 :
662 : /* Check if name is used */
663 314 : subid = GetSysCacheOid2(SUBSCRIPTIONNAME, Anum_pg_subscription_oid,
664 : MyDatabaseId, CStringGetDatum(stmt->subname));
665 314 : if (OidIsValid(subid))
666 : {
667 6 : ereport(ERROR,
668 : (errcode(ERRCODE_DUPLICATE_OBJECT),
669 : errmsg("subscription \"%s\" already exists",
670 : stmt->subname)));
671 : }
672 :
673 308 : if (!IsSet(opts.specified_opts, SUBOPT_SLOT_NAME) &&
674 266 : opts.slot_name == NULL)
675 266 : opts.slot_name = stmt->subname;
676 :
677 : /* The default for synchronous_commit of subscriptions is off. */
678 308 : if (opts.synchronous_commit == NULL)
679 308 : opts.synchronous_commit = "off";
680 :
681 308 : conninfo = stmt->conninfo;
682 308 : publications = stmt->publication;
683 :
684 : /* Load the library providing us libpq calls. */
685 308 : load_file("libpqwalreceiver", false);
686 :
687 : /* Check the connection info string. */
688 308 : walrcv_check_conninfo(conninfo, opts.passwordrequired && !superuser());
689 :
690 : /* Everything ok, form a new tuple. */
691 290 : memset(values, 0, sizeof(values));
692 290 : memset(nulls, false, sizeof(nulls));
693 :
694 290 : subid = GetNewOidWithIndex(rel, SubscriptionObjectIndexId,
695 : Anum_pg_subscription_oid);
696 290 : values[Anum_pg_subscription_oid - 1] = ObjectIdGetDatum(subid);
697 290 : values[Anum_pg_subscription_subdbid - 1] = ObjectIdGetDatum(MyDatabaseId);
698 290 : values[Anum_pg_subscription_subskiplsn - 1] = LSNGetDatum(InvalidXLogRecPtr);
699 290 : values[Anum_pg_subscription_subname - 1] =
700 290 : DirectFunctionCall1(namein, CStringGetDatum(stmt->subname));
701 290 : values[Anum_pg_subscription_subowner - 1] = ObjectIdGetDatum(owner);
702 290 : values[Anum_pg_subscription_subenabled - 1] = BoolGetDatum(opts.enabled);
703 290 : values[Anum_pg_subscription_subbinary - 1] = BoolGetDatum(opts.binary);
704 290 : values[Anum_pg_subscription_substream - 1] = CharGetDatum(opts.streaming);
705 290 : values[Anum_pg_subscription_subtwophasestate - 1] =
706 290 : CharGetDatum(opts.twophase ?
707 : LOGICALREP_TWOPHASE_STATE_PENDING :
708 : LOGICALREP_TWOPHASE_STATE_DISABLED);
709 290 : values[Anum_pg_subscription_subdisableonerr - 1] = BoolGetDatum(opts.disableonerr);
710 290 : values[Anum_pg_subscription_subpasswordrequired - 1] = BoolGetDatum(opts.passwordrequired);
711 290 : values[Anum_pg_subscription_subrunasowner - 1] = BoolGetDatum(opts.runasowner);
712 290 : values[Anum_pg_subscription_subfailover - 1] = BoolGetDatum(opts.failover);
713 290 : values[Anum_pg_subscription_subconninfo - 1] =
714 290 : CStringGetTextDatum(conninfo);
715 290 : if (opts.slot_name)
716 270 : values[Anum_pg_subscription_subslotname - 1] =
717 270 : DirectFunctionCall1(namein, CStringGetDatum(opts.slot_name));
718 : else
719 20 : nulls[Anum_pg_subscription_subslotname - 1] = true;
720 290 : values[Anum_pg_subscription_subsynccommit - 1] =
721 290 : CStringGetTextDatum(opts.synchronous_commit);
722 284 : values[Anum_pg_subscription_subpublications - 1] =
723 290 : publicationListToArray(publications);
724 284 : values[Anum_pg_subscription_suborigin - 1] =
725 284 : CStringGetTextDatum(opts.origin);
726 :
727 284 : tup = heap_form_tuple(RelationGetDescr(rel), values, nulls);
728 :
729 : /* Insert tuple into catalog. */
730 284 : CatalogTupleInsert(rel, tup);
731 284 : heap_freetuple(tup);
732 :
733 284 : recordDependencyOnOwner(SubscriptionRelationId, subid, owner);
734 :
735 284 : ReplicationOriginNameForLogicalRep(subid, InvalidOid, originname, sizeof(originname));
736 284 : replorigin_create(originname);
737 :
738 : /*
739 : * Connect to remote side to execute requested commands and fetch table
740 : * info.
741 : */
742 284 : if (opts.connect)
743 : {
744 : char *err;
745 : WalReceiverConn *wrconn;
746 : List *tables;
747 : ListCell *lc;
748 : char table_state;
749 : bool must_use_password;
750 :
751 : /* Try to connect to the publisher. */
752 206 : must_use_password = !superuser_arg(owner) && opts.passwordrequired;
753 206 : wrconn = walrcv_connect(conninfo, true, true, must_use_password,
754 : stmt->subname, &err);
755 206 : if (!wrconn)
756 6 : ereport(ERROR,
757 : (errcode(ERRCODE_CONNECTION_FAILURE),
758 : errmsg("could not connect to the publisher: %s", err)));
759 :
760 200 : PG_TRY();
761 : {
762 200 : check_publications(wrconn, publications);
763 200 : check_publications_origin(wrconn, publications, opts.copy_data,
764 : opts.origin, NULL, 0, stmt->subname);
765 :
766 : /*
767 : * Set sync state based on if we were asked to do data copy or
768 : * not.
769 : */
770 200 : table_state = opts.copy_data ? SUBREL_STATE_INIT : SUBREL_STATE_READY;
771 :
772 : /*
773 : * Get the table list from publisher and build local table status
774 : * info.
775 : */
776 200 : tables = fetch_table_list(wrconn, publications);
777 506 : foreach(lc, tables)
778 : {
779 308 : RangeVar *rv = (RangeVar *) lfirst(lc);
780 : Oid relid;
781 :
782 308 : relid = RangeVarGetRelid(rv, AccessShareLock, false);
783 :
784 : /* Check for supported relkind. */
785 308 : CheckSubscriptionRelkind(get_rel_relkind(relid),
786 308 : rv->schemaname, rv->relname);
787 :
788 308 : AddSubscriptionRelState(subid, relid, table_state,
789 : InvalidXLogRecPtr, true);
790 : }
791 :
792 : /*
793 : * If requested, create permanent slot for the subscription. We
794 : * won't use the initial snapshot for anything, so no need to
795 : * export it.
796 : */
797 198 : if (opts.create_slot)
798 : {
799 188 : bool twophase_enabled = false;
800 :
801 : Assert(opts.slot_name);
802 :
803 : /*
804 : * Even if two_phase is set, don't create the slot with
805 : * two-phase enabled. Will enable it once all the tables are
806 : * synced and ready. This avoids race-conditions like prepared
807 : * transactions being skipped due to changes not being applied
808 : * due to checks in should_apply_changes_for_rel() when
809 : * tablesync for the corresponding tables are in progress. See
810 : * comments atop worker.c.
811 : *
812 : * Note that if tables were specified but copy_data is false
813 : * then it is safe to enable two_phase up-front because those
814 : * tables are already initially in READY state. When the
815 : * subscription has no tables, we leave the twophase state as
816 : * PENDING, to allow ALTER SUBSCRIPTION ... REFRESH
817 : * PUBLICATION to work.
818 : */
819 188 : if (opts.twophase && !opts.copy_data && tables != NIL)
820 2 : twophase_enabled = true;
821 :
822 188 : walrcv_create_slot(wrconn, opts.slot_name, false, twophase_enabled,
823 : opts.failover, CRS_NOEXPORT_SNAPSHOT, NULL);
824 :
825 188 : if (twophase_enabled)
826 2 : UpdateTwoPhaseState(subid, LOGICALREP_TWOPHASE_STATE_ENABLED);
827 :
828 188 : ereport(NOTICE,
829 : (errmsg("created replication slot \"%s\" on publisher",
830 : opts.slot_name)));
831 : }
832 : }
833 2 : PG_FINALLY();
834 : {
835 200 : walrcv_disconnect(wrconn);
836 : }
837 200 : PG_END_TRY();
838 : }
839 : else
840 78 : ereport(WARNING,
841 : (errmsg("subscription was created, but is not connected"),
842 : errhint("To initiate replication, you must manually create the replication slot, enable the subscription, and refresh the subscription.")));
843 :
844 276 : table_close(rel, RowExclusiveLock);
845 :
846 276 : pgstat_create_subscription(subid);
847 :
848 276 : if (opts.enabled)
849 186 : ApplyLauncherWakeupAtCommit();
850 :
851 276 : ObjectAddressSet(myself, SubscriptionRelationId, subid);
852 :
853 276 : InvokeObjectPostCreateHook(SubscriptionRelationId, subid, 0);
854 :
855 276 : return myself;
856 : }
857 :
858 : static void
859 58 : AlterSubscription_refresh(Subscription *sub, bool copy_data,
860 : List *validate_publications)
861 : {
862 : char *err;
863 : List *pubrel_names;
864 : List *subrel_states;
865 : Oid *subrel_local_oids;
866 : Oid *pubrel_local_oids;
867 : ListCell *lc;
868 : int off;
869 : int remove_rel_len;
870 : int subrel_count;
871 58 : Relation rel = NULL;
872 : typedef struct SubRemoveRels
873 : {
874 : Oid relid;
875 : char state;
876 : } SubRemoveRels;
877 : SubRemoveRels *sub_remove_rels;
878 : WalReceiverConn *wrconn;
879 : bool must_use_password;
880 :
881 : /* Load the library providing us libpq calls. */
882 58 : load_file("libpqwalreceiver", false);
883 :
884 : /* Try to connect to the publisher. */
885 58 : must_use_password = sub->passwordrequired && !sub->ownersuperuser;
886 58 : wrconn = walrcv_connect(sub->conninfo, true, true, must_use_password,
887 : sub->name, &err);
888 56 : if (!wrconn)
889 0 : ereport(ERROR,
890 : (errcode(ERRCODE_CONNECTION_FAILURE),
891 : errmsg("could not connect to the publisher: %s", err)));
892 :
893 56 : PG_TRY();
894 : {
895 56 : if (validate_publications)
896 14 : check_publications(wrconn, validate_publications);
897 :
898 : /* Get the table list from publisher. */
899 56 : pubrel_names = fetch_table_list(wrconn, sub->publications);
900 :
901 : /* Get local table list. */
902 56 : subrel_states = GetSubscriptionRelations(sub->oid, false);
903 56 : subrel_count = list_length(subrel_states);
904 :
905 : /*
906 : * Build qsorted array of local table oids for faster lookup. This can
907 : * potentially contain all tables in the database so speed of lookup
908 : * is important.
909 : */
910 56 : subrel_local_oids = palloc(subrel_count * sizeof(Oid));
911 56 : off = 0;
912 218 : foreach(lc, subrel_states)
913 : {
914 162 : SubscriptionRelState *relstate = (SubscriptionRelState *) lfirst(lc);
915 :
916 162 : subrel_local_oids[off++] = relstate->relid;
917 : }
918 56 : qsort(subrel_local_oids, subrel_count,
919 : sizeof(Oid), oid_cmp);
920 :
921 56 : check_publications_origin(wrconn, sub->publications, copy_data,
922 : sub->origin, subrel_local_oids,
923 : subrel_count, sub->name);
924 :
925 : /*
926 : * Rels that we want to remove from subscription and drop any slots
927 : * and origins corresponding to them.
928 : */
929 56 : sub_remove_rels = palloc(subrel_count * sizeof(SubRemoveRels));
930 :
931 : /*
932 : * Walk over the remote tables and try to match them to locally known
933 : * tables. If the table is not known locally create a new state for
934 : * it.
935 : *
936 : * Also builds array of local oids of remote tables for the next step.
937 : */
938 56 : off = 0;
939 56 : pubrel_local_oids = palloc(list_length(pubrel_names) * sizeof(Oid));
940 :
941 220 : foreach(lc, pubrel_names)
942 : {
943 164 : RangeVar *rv = (RangeVar *) lfirst(lc);
944 : Oid relid;
945 :
946 164 : relid = RangeVarGetRelid(rv, AccessShareLock, false);
947 :
948 : /* Check for supported relkind. */
949 164 : CheckSubscriptionRelkind(get_rel_relkind(relid),
950 164 : rv->schemaname, rv->relname);
951 :
952 164 : pubrel_local_oids[off++] = relid;
953 :
954 164 : if (!bsearch(&relid, subrel_local_oids,
955 : subrel_count, sizeof(Oid), oid_cmp))
956 : {
957 38 : AddSubscriptionRelState(sub->oid, relid,
958 : copy_data ? SUBREL_STATE_INIT : SUBREL_STATE_READY,
959 : InvalidXLogRecPtr, true);
960 38 : ereport(DEBUG1,
961 : (errmsg_internal("table \"%s.%s\" added to subscription \"%s\"",
962 : rv->schemaname, rv->relname, sub->name)));
963 : }
964 : }
965 :
966 : /*
967 : * Next remove state for tables we should not care about anymore using
968 : * the data we collected above
969 : */
970 56 : qsort(pubrel_local_oids, list_length(pubrel_names),
971 : sizeof(Oid), oid_cmp);
972 :
973 56 : remove_rel_len = 0;
974 218 : for (off = 0; off < subrel_count; off++)
975 : {
976 162 : Oid relid = subrel_local_oids[off];
977 :
978 162 : if (!bsearch(&relid, pubrel_local_oids,
979 162 : list_length(pubrel_names), sizeof(Oid), oid_cmp))
980 : {
981 : char state;
982 : XLogRecPtr statelsn;
983 :
984 : /*
985 : * Lock pg_subscription_rel with AccessExclusiveLock to
986 : * prevent any race conditions with the apply worker
987 : * re-launching workers at the same time this code is trying
988 : * to remove those tables.
989 : *
990 : * Even if new worker for this particular rel is restarted it
991 : * won't be able to make any progress as we hold exclusive
992 : * lock on pg_subscription_rel till the transaction end. It
993 : * will simply exit as there is no corresponding rel entry.
994 : *
995 : * This locking also ensures that the state of rels won't
996 : * change till we are done with this refresh operation.
997 : */
998 36 : if (!rel)
999 14 : rel = table_open(SubscriptionRelRelationId, AccessExclusiveLock);
1000 :
1001 : /* Last known rel state. */
1002 36 : state = GetSubscriptionRelState(sub->oid, relid, &statelsn);
1003 :
1004 36 : sub_remove_rels[remove_rel_len].relid = relid;
1005 36 : sub_remove_rels[remove_rel_len++].state = state;
1006 :
1007 36 : RemoveSubscriptionRel(sub->oid, relid);
1008 :
1009 36 : logicalrep_worker_stop(sub->oid, relid);
1010 :
1011 : /*
1012 : * For READY state, we would have already dropped the
1013 : * tablesync origin.
1014 : */
1015 36 : if (state != SUBREL_STATE_READY)
1016 : {
1017 : char originname[NAMEDATALEN];
1018 :
1019 : /*
1020 : * Drop the tablesync's origin tracking if exists.
1021 : *
1022 : * It is possible that the origin is not yet created for
1023 : * tablesync worker, this can happen for the states before
1024 : * SUBREL_STATE_FINISHEDCOPY. The tablesync worker or
1025 : * apply worker can also concurrently try to drop the
1026 : * origin and by this time the origin might be already
1027 : * removed. For these reasons, passing missing_ok = true.
1028 : */
1029 0 : ReplicationOriginNameForLogicalRep(sub->oid, relid, originname,
1030 : sizeof(originname));
1031 0 : replorigin_drop_by_name(originname, true, false);
1032 : }
1033 :
1034 36 : ereport(DEBUG1,
1035 : (errmsg_internal("table \"%s.%s\" removed from subscription \"%s\"",
1036 : get_namespace_name(get_rel_namespace(relid)),
1037 : get_rel_name(relid),
1038 : sub->name)));
1039 : }
1040 : }
1041 :
1042 : /*
1043 : * Drop the tablesync slots associated with removed tables. This has
1044 : * to be at the end because otherwise if there is an error while doing
1045 : * the database operations we won't be able to rollback dropped slots.
1046 : */
1047 92 : for (off = 0; off < remove_rel_len; off++)
1048 : {
1049 36 : if (sub_remove_rels[off].state != SUBREL_STATE_READY &&
1050 0 : sub_remove_rels[off].state != SUBREL_STATE_SYNCDONE)
1051 : {
1052 0 : char syncslotname[NAMEDATALEN] = {0};
1053 :
1054 : /*
1055 : * For READY/SYNCDONE states we know the tablesync slot has
1056 : * already been dropped by the tablesync worker.
1057 : *
1058 : * For other states, there is no certainty, maybe the slot
1059 : * does not exist yet. Also, if we fail after removing some of
1060 : * the slots, next time, it will again try to drop already
1061 : * dropped slots and fail. For these reasons, we allow
1062 : * missing_ok = true for the drop.
1063 : */
1064 0 : ReplicationSlotNameForTablesync(sub->oid, sub_remove_rels[off].relid,
1065 : syncslotname, sizeof(syncslotname));
1066 0 : ReplicationSlotDropAtPubNode(wrconn, syncslotname, true);
1067 : }
1068 : }
1069 : }
1070 0 : PG_FINALLY();
1071 : {
1072 56 : walrcv_disconnect(wrconn);
1073 : }
1074 56 : PG_END_TRY();
1075 :
1076 56 : if (rel)
1077 14 : table_close(rel, NoLock);
1078 56 : }
1079 :
1080 : /*
1081 : * Alter the existing subscription.
1082 : */
1083 : ObjectAddress
1084 440 : AlterSubscription(ParseState *pstate, AlterSubscriptionStmt *stmt,
1085 : bool isTopLevel)
1086 : {
1087 : Relation rel;
1088 : ObjectAddress myself;
1089 : bool nulls[Natts_pg_subscription];
1090 : bool replaces[Natts_pg_subscription];
1091 : Datum values[Natts_pg_subscription];
1092 : HeapTuple tup;
1093 : Oid subid;
1094 440 : bool update_tuple = false;
1095 : Subscription *sub;
1096 : Form_pg_subscription form;
1097 : bits32 supported_opts;
1098 440 : SubOpts opts = {0};
1099 :
1100 440 : rel = table_open(SubscriptionRelationId, RowExclusiveLock);
1101 :
1102 : /* Fetch the existing tuple. */
1103 440 : tup = SearchSysCacheCopy2(SUBSCRIPTIONNAME, MyDatabaseId,
1104 : CStringGetDatum(stmt->subname));
1105 :
1106 440 : if (!HeapTupleIsValid(tup))
1107 6 : ereport(ERROR,
1108 : (errcode(ERRCODE_UNDEFINED_OBJECT),
1109 : errmsg("subscription \"%s\" does not exist",
1110 : stmt->subname)));
1111 :
1112 434 : form = (Form_pg_subscription) GETSTRUCT(tup);
1113 434 : subid = form->oid;
1114 :
1115 : /* must be owner */
1116 434 : if (!object_ownercheck(SubscriptionRelationId, subid, GetUserId()))
1117 0 : aclcheck_error(ACLCHECK_NOT_OWNER, OBJECT_SUBSCRIPTION,
1118 0 : stmt->subname);
1119 :
1120 434 : sub = GetSubscription(subid, false);
1121 :
1122 : /*
1123 : * Don't allow non-superuser modification of a subscription with
1124 : * password_required=false.
1125 : */
1126 434 : if (!sub->passwordrequired && !superuser())
1127 0 : ereport(ERROR,
1128 : (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
1129 : errmsg("password_required=false is superuser-only"),
1130 : errhint("Subscriptions with the password_required option set to false may only be created or modified by the superuser.")));
1131 :
1132 : /* Lock the subscription so nobody else can do anything with it. */
1133 434 : LockSharedObject(SubscriptionRelationId, subid, 0, AccessExclusiveLock);
1134 :
1135 : /* Form a new tuple. */
1136 434 : memset(values, 0, sizeof(values));
1137 434 : memset(nulls, false, sizeof(nulls));
1138 434 : memset(replaces, false, sizeof(replaces));
1139 :
1140 434 : switch (stmt->kind)
1141 : {
1142 184 : case ALTER_SUBSCRIPTION_OPTIONS:
1143 : {
1144 184 : supported_opts = (SUBOPT_SLOT_NAME |
1145 : SUBOPT_SYNCHRONOUS_COMMIT | SUBOPT_BINARY |
1146 : SUBOPT_STREAMING | SUBOPT_DISABLE_ON_ERR |
1147 : SUBOPT_PASSWORD_REQUIRED |
1148 : SUBOPT_RUN_AS_OWNER | SUBOPT_FAILOVER |
1149 : SUBOPT_ORIGIN);
1150 :
1151 184 : parse_subscription_options(pstate, stmt->options,
1152 : supported_opts, &opts);
1153 :
1154 160 : if (IsSet(opts.specified_opts, SUBOPT_SLOT_NAME))
1155 : {
1156 : /*
1157 : * The subscription must be disabled to allow slot_name as
1158 : * 'none', otherwise, the apply worker will repeatedly try
1159 : * to stream the data using that slot_name which neither
1160 : * exists on the publisher nor the user will be allowed to
1161 : * create it.
1162 : */
1163 58 : if (sub->enabled && !opts.slot_name)
1164 0 : ereport(ERROR,
1165 : (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
1166 : errmsg("cannot set %s for enabled subscription",
1167 : "slot_name = NONE")));
1168 :
1169 58 : if (opts.slot_name)
1170 6 : values[Anum_pg_subscription_subslotname - 1] =
1171 6 : DirectFunctionCall1(namein, CStringGetDatum(opts.slot_name));
1172 : else
1173 52 : nulls[Anum_pg_subscription_subslotname - 1] = true;
1174 58 : replaces[Anum_pg_subscription_subslotname - 1] = true;
1175 : }
1176 :
1177 160 : if (opts.synchronous_commit)
1178 : {
1179 6 : values[Anum_pg_subscription_subsynccommit - 1] =
1180 6 : CStringGetTextDatum(opts.synchronous_commit);
1181 6 : replaces[Anum_pg_subscription_subsynccommit - 1] = true;
1182 : }
1183 :
1184 160 : if (IsSet(opts.specified_opts, SUBOPT_BINARY))
1185 : {
1186 18 : values[Anum_pg_subscription_subbinary - 1] =
1187 18 : BoolGetDatum(opts.binary);
1188 18 : replaces[Anum_pg_subscription_subbinary - 1] = true;
1189 : }
1190 :
1191 160 : if (IsSet(opts.specified_opts, SUBOPT_STREAMING))
1192 : {
1193 30 : values[Anum_pg_subscription_substream - 1] =
1194 30 : CharGetDatum(opts.streaming);
1195 30 : replaces[Anum_pg_subscription_substream - 1] = true;
1196 : }
1197 :
1198 160 : if (IsSet(opts.specified_opts, SUBOPT_DISABLE_ON_ERR))
1199 : {
1200 : values[Anum_pg_subscription_subdisableonerr - 1]
1201 6 : = BoolGetDatum(opts.disableonerr);
1202 : replaces[Anum_pg_subscription_subdisableonerr - 1]
1203 6 : = true;
1204 : }
1205 :
1206 160 : if (IsSet(opts.specified_opts, SUBOPT_PASSWORD_REQUIRED))
1207 : {
1208 : /* Non-superuser may not disable password_required. */
1209 12 : if (!opts.passwordrequired && !superuser())
1210 0 : ereport(ERROR,
1211 : (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
1212 : errmsg("password_required=false is superuser-only"),
1213 : errhint("Subscriptions with the password_required option set to false may only be created or modified by the superuser.")));
1214 :
1215 : values[Anum_pg_subscription_subpasswordrequired - 1]
1216 12 : = BoolGetDatum(opts.passwordrequired);
1217 : replaces[Anum_pg_subscription_subpasswordrequired - 1]
1218 12 : = true;
1219 : }
1220 :
1221 160 : if (IsSet(opts.specified_opts, SUBOPT_RUN_AS_OWNER))
1222 : {
1223 14 : values[Anum_pg_subscription_subrunasowner - 1] =
1224 14 : BoolGetDatum(opts.runasowner);
1225 14 : replaces[Anum_pg_subscription_subrunasowner - 1] = true;
1226 : }
1227 :
1228 160 : if (IsSet(opts.specified_opts, SUBOPT_FAILOVER))
1229 : {
1230 12 : if (!sub->slotname)
1231 0 : ereport(ERROR,
1232 : (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
1233 : errmsg("cannot set %s for a subscription that does not have a slot name",
1234 : "failover")));
1235 :
1236 : /*
1237 : * Do not allow changing the failover state if the
1238 : * subscription is enabled. This is because the failover
1239 : * state of the slot on the publisher cannot be modified
1240 : * if the slot is currently acquired by the apply worker.
1241 : */
1242 12 : if (sub->enabled)
1243 2 : ereport(ERROR,
1244 : (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
1245 : errmsg("cannot set %s for enabled subscription",
1246 : "failover")));
1247 :
1248 : /*
1249 : * The changed failover option of the slot can't be rolled
1250 : * back.
1251 : */
1252 10 : PreventInTransactionBlock(isTopLevel, "ALTER SUBSCRIPTION ... SET (failover)");
1253 :
1254 4 : values[Anum_pg_subscription_subfailover - 1] =
1255 4 : BoolGetDatum(opts.failover);
1256 4 : replaces[Anum_pg_subscription_subfailover - 1] = true;
1257 : }
1258 :
1259 152 : if (IsSet(opts.specified_opts, SUBOPT_ORIGIN))
1260 : {
1261 6 : values[Anum_pg_subscription_suborigin - 1] =
1262 6 : CStringGetTextDatum(opts.origin);
1263 6 : replaces[Anum_pg_subscription_suborigin - 1] = true;
1264 : }
1265 :
1266 152 : update_tuple = true;
1267 152 : break;
1268 : }
1269 :
1270 70 : case ALTER_SUBSCRIPTION_ENABLED:
1271 : {
1272 70 : parse_subscription_options(pstate, stmt->options,
1273 : SUBOPT_ENABLED, &opts);
1274 : Assert(IsSet(opts.specified_opts, SUBOPT_ENABLED));
1275 :
1276 70 : if (!sub->slotname && opts.enabled)
1277 6 : ereport(ERROR,
1278 : (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
1279 : errmsg("cannot enable subscription that does not have a slot name")));
1280 :
1281 64 : values[Anum_pg_subscription_subenabled - 1] =
1282 64 : BoolGetDatum(opts.enabled);
1283 64 : replaces[Anum_pg_subscription_subenabled - 1] = true;
1284 :
1285 64 : if (opts.enabled)
1286 38 : ApplyLauncherWakeupAtCommit();
1287 :
1288 64 : update_tuple = true;
1289 64 : break;
1290 : }
1291 :
1292 20 : case ALTER_SUBSCRIPTION_CONNECTION:
1293 : /* Load the library providing us libpq calls. */
1294 20 : load_file("libpqwalreceiver", false);
1295 : /* Check the connection info string. */
1296 20 : walrcv_check_conninfo(stmt->conninfo,
1297 : sub->passwordrequired && !sub->ownersuperuser);
1298 :
1299 14 : values[Anum_pg_subscription_subconninfo - 1] =
1300 14 : CStringGetTextDatum(stmt->conninfo);
1301 14 : replaces[Anum_pg_subscription_subconninfo - 1] = true;
1302 14 : update_tuple = true;
1303 14 : break;
1304 :
1305 28 : case ALTER_SUBSCRIPTION_SET_PUBLICATION:
1306 : {
1307 28 : supported_opts = SUBOPT_COPY_DATA | SUBOPT_REFRESH;
1308 28 : parse_subscription_options(pstate, stmt->options,
1309 : supported_opts, &opts);
1310 :
1311 28 : values[Anum_pg_subscription_subpublications - 1] =
1312 28 : publicationListToArray(stmt->publication);
1313 28 : replaces[Anum_pg_subscription_subpublications - 1] = true;
1314 :
1315 28 : update_tuple = true;
1316 :
1317 : /* Refresh if user asked us to. */
1318 28 : if (opts.refresh)
1319 : {
1320 22 : if (!sub->enabled)
1321 0 : ereport(ERROR,
1322 : (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
1323 : errmsg("ALTER SUBSCRIPTION with refresh is not allowed for disabled subscriptions"),
1324 : errhint("Use ALTER SUBSCRIPTION ... SET PUBLICATION ... WITH (refresh = false).")));
1325 :
1326 : /*
1327 : * See ALTER_SUBSCRIPTION_REFRESH for details why this is
1328 : * not allowed.
1329 : */
1330 22 : if (sub->twophasestate == LOGICALREP_TWOPHASE_STATE_ENABLED && opts.copy_data)
1331 0 : ereport(ERROR,
1332 : (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
1333 : errmsg("ALTER SUBSCRIPTION with refresh and copy_data is not allowed when two_phase is enabled"),
1334 : errhint("Use ALTER SUBSCRIPTION ... SET PUBLICATION with refresh = false, or with copy_data = false, or use DROP/CREATE SUBSCRIPTION.")));
1335 :
1336 22 : PreventInTransactionBlock(isTopLevel, "ALTER SUBSCRIPTION with refresh");
1337 :
1338 : /* Make sure refresh sees the new list of publications. */
1339 10 : sub->publications = stmt->publication;
1340 :
1341 10 : AlterSubscription_refresh(sub, opts.copy_data,
1342 : stmt->publication);
1343 : }
1344 :
1345 16 : break;
1346 : }
1347 :
1348 54 : case ALTER_SUBSCRIPTION_ADD_PUBLICATION:
1349 : case ALTER_SUBSCRIPTION_DROP_PUBLICATION:
1350 : {
1351 : List *publist;
1352 54 : bool isadd = stmt->kind == ALTER_SUBSCRIPTION_ADD_PUBLICATION;
1353 :
1354 54 : supported_opts = SUBOPT_REFRESH | SUBOPT_COPY_DATA;
1355 54 : parse_subscription_options(pstate, stmt->options,
1356 : supported_opts, &opts);
1357 :
1358 54 : publist = merge_publications(sub->publications, stmt->publication, isadd, stmt->subname);
1359 18 : values[Anum_pg_subscription_subpublications - 1] =
1360 18 : publicationListToArray(publist);
1361 18 : replaces[Anum_pg_subscription_subpublications - 1] = true;
1362 :
1363 18 : update_tuple = true;
1364 :
1365 : /* Refresh if user asked us to. */
1366 18 : if (opts.refresh)
1367 : {
1368 : /* We only need to validate user specified publications. */
1369 6 : List *validate_publications = (isadd) ? stmt->publication : NULL;
1370 :
1371 6 : if (!sub->enabled)
1372 0 : ereport(ERROR,
1373 : (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
1374 : errmsg("ALTER SUBSCRIPTION with refresh is not allowed for disabled subscriptions"),
1375 : /* translator: %s is an SQL ALTER command */
1376 : errhint("Use %s instead.",
1377 : isadd ?
1378 : "ALTER SUBSCRIPTION ... ADD PUBLICATION ... WITH (refresh = false)" :
1379 : "ALTER SUBSCRIPTION ... DROP PUBLICATION ... WITH (refresh = false)")));
1380 :
1381 : /*
1382 : * See ALTER_SUBSCRIPTION_REFRESH for details why this is
1383 : * not allowed.
1384 : */
1385 6 : if (sub->twophasestate == LOGICALREP_TWOPHASE_STATE_ENABLED && opts.copy_data)
1386 0 : ereport(ERROR,
1387 : (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
1388 : errmsg("ALTER SUBSCRIPTION with refresh and copy_data is not allowed when two_phase is enabled"),
1389 : /* translator: %s is an SQL ALTER command */
1390 : errhint("Use %s with refresh = false, or with copy_data = false, or use DROP/CREATE SUBSCRIPTION.",
1391 : isadd ?
1392 : "ALTER SUBSCRIPTION ... ADD PUBLICATION" :
1393 : "ALTER SUBSCRIPTION ... DROP PUBLICATION")));
1394 :
1395 6 : PreventInTransactionBlock(isTopLevel, "ALTER SUBSCRIPTION with refresh");
1396 :
1397 : /* Refresh the new list of publications. */
1398 6 : sub->publications = publist;
1399 :
1400 6 : AlterSubscription_refresh(sub, opts.copy_data,
1401 : validate_publications);
1402 : }
1403 :
1404 18 : break;
1405 : }
1406 :
1407 54 : case ALTER_SUBSCRIPTION_REFRESH:
1408 : {
1409 54 : if (!sub->enabled)
1410 6 : ereport(ERROR,
1411 : (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
1412 : errmsg("ALTER SUBSCRIPTION ... REFRESH is not allowed for disabled subscriptions")));
1413 :
1414 48 : parse_subscription_options(pstate, stmt->options,
1415 : SUBOPT_COPY_DATA, &opts);
1416 :
1417 : /*
1418 : * The subscription option "two_phase" requires that
1419 : * replication has passed the initial table synchronization
1420 : * phase before the two_phase becomes properly enabled.
1421 : *
1422 : * But, having reached this two-phase commit "enabled" state
1423 : * we must not allow any subsequent table initialization to
1424 : * occur. So the ALTER SUBSCRIPTION ... REFRESH is disallowed
1425 : * when the user had requested two_phase = on mode.
1426 : *
1427 : * The exception to this restriction is when copy_data =
1428 : * false, because when copy_data is false the tablesync will
1429 : * start already in READY state and will exit directly without
1430 : * doing anything.
1431 : *
1432 : * For more details see comments atop worker.c.
1433 : */
1434 48 : if (sub->twophasestate == LOGICALREP_TWOPHASE_STATE_ENABLED && opts.copy_data)
1435 0 : ereport(ERROR,
1436 : (errcode(ERRCODE_SYNTAX_ERROR),
1437 : errmsg("ALTER SUBSCRIPTION ... REFRESH with copy_data is not allowed when two_phase is enabled"),
1438 : errhint("Use ALTER SUBSCRIPTION ... REFRESH with copy_data = false, or use DROP/CREATE SUBSCRIPTION.")));
1439 :
1440 48 : PreventInTransactionBlock(isTopLevel, "ALTER SUBSCRIPTION ... REFRESH");
1441 :
1442 42 : AlterSubscription_refresh(sub, opts.copy_data, NULL);
1443 :
1444 40 : break;
1445 : }
1446 :
1447 24 : case ALTER_SUBSCRIPTION_SKIP:
1448 : {
1449 24 : parse_subscription_options(pstate, stmt->options, SUBOPT_LSN, &opts);
1450 :
1451 : /* ALTER SUBSCRIPTION ... SKIP supports only LSN option */
1452 : Assert(IsSet(opts.specified_opts, SUBOPT_LSN));
1453 :
1454 : /*
1455 : * If the user sets subskiplsn, we do a sanity check to make
1456 : * sure that the specified LSN is a probable value.
1457 : */
1458 18 : if (!XLogRecPtrIsInvalid(opts.lsn))
1459 : {
1460 : RepOriginId originid;
1461 : char originname[NAMEDATALEN];
1462 : XLogRecPtr remote_lsn;
1463 :
1464 12 : ReplicationOriginNameForLogicalRep(subid, InvalidOid,
1465 : originname, sizeof(originname));
1466 12 : originid = replorigin_by_name(originname, false);
1467 12 : remote_lsn = replorigin_get_progress(originid, false);
1468 :
1469 : /* Check the given LSN is at least a future LSN */
1470 12 : if (!XLogRecPtrIsInvalid(remote_lsn) && opts.lsn < remote_lsn)
1471 0 : ereport(ERROR,
1472 : (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
1473 : errmsg("skip WAL location (LSN %X/%X) must be greater than origin LSN %X/%X",
1474 : LSN_FORMAT_ARGS(opts.lsn),
1475 : LSN_FORMAT_ARGS(remote_lsn))));
1476 : }
1477 :
1478 18 : values[Anum_pg_subscription_subskiplsn - 1] = LSNGetDatum(opts.lsn);
1479 18 : replaces[Anum_pg_subscription_subskiplsn - 1] = true;
1480 :
1481 18 : update_tuple = true;
1482 18 : break;
1483 : }
1484 :
1485 0 : default:
1486 0 : elog(ERROR, "unrecognized ALTER SUBSCRIPTION kind %d",
1487 : stmt->kind);
1488 : }
1489 :
1490 : /* Update the catalog if needed. */
1491 322 : if (update_tuple)
1492 : {
1493 282 : tup = heap_modify_tuple(tup, RelationGetDescr(rel), values, nulls,
1494 : replaces);
1495 :
1496 282 : CatalogTupleUpdate(rel, &tup->t_self, tup);
1497 :
1498 282 : heap_freetuple(tup);
1499 : }
1500 :
1501 : /*
1502 : * Try to acquire the connection necessary for altering slot.
1503 : *
1504 : * This has to be at the end because otherwise if there is an error while
1505 : * doing the database operations we won't be able to rollback altered
1506 : * slot.
1507 : */
1508 322 : if (replaces[Anum_pg_subscription_subfailover - 1])
1509 : {
1510 : bool must_use_password;
1511 : char *err;
1512 : WalReceiverConn *wrconn;
1513 :
1514 : /* Load the library providing us libpq calls. */
1515 4 : load_file("libpqwalreceiver", false);
1516 :
1517 : /* Try to connect to the publisher. */
1518 4 : must_use_password = sub->passwordrequired && !sub->ownersuperuser;
1519 4 : wrconn = walrcv_connect(sub->conninfo, true, true, must_use_password,
1520 : sub->name, &err);
1521 4 : if (!wrconn)
1522 0 : ereport(ERROR,
1523 : (errcode(ERRCODE_CONNECTION_FAILURE),
1524 : errmsg("could not connect to the publisher: %s", err)));
1525 :
1526 4 : PG_TRY();
1527 : {
1528 4 : walrcv_alter_slot(wrconn, sub->slotname, opts.failover);
1529 : }
1530 0 : PG_FINALLY();
1531 : {
1532 4 : walrcv_disconnect(wrconn);
1533 : }
1534 4 : PG_END_TRY();
1535 : }
1536 :
1537 322 : table_close(rel, RowExclusiveLock);
1538 :
1539 322 : ObjectAddressSet(myself, SubscriptionRelationId, subid);
1540 :
1541 322 : InvokeObjectPostAlterHook(SubscriptionRelationId, subid, 0);
1542 :
1543 : /* Wake up related replication workers to handle this change quickly. */
1544 322 : LogicalRepWorkersWakeupAtCommit(subid);
1545 :
1546 322 : return myself;
1547 : }
1548 :
1549 : /*
1550 : * Drop a subscription
1551 : */
1552 : void
1553 192 : DropSubscription(DropSubscriptionStmt *stmt, bool isTopLevel)
1554 : {
1555 : Relation rel;
1556 : ObjectAddress myself;
1557 : HeapTuple tup;
1558 : Oid subid;
1559 : Oid subowner;
1560 : Datum datum;
1561 : bool isnull;
1562 : char *subname;
1563 : char *conninfo;
1564 : char *slotname;
1565 : List *subworkers;
1566 : ListCell *lc;
1567 : char originname[NAMEDATALEN];
1568 192 : char *err = NULL;
1569 : WalReceiverConn *wrconn;
1570 : Form_pg_subscription form;
1571 : List *rstates;
1572 : bool must_use_password;
1573 :
1574 : /*
1575 : * Lock pg_subscription with AccessExclusiveLock to ensure that the
1576 : * launcher doesn't restart new worker during dropping the subscription
1577 : */
1578 192 : rel = table_open(SubscriptionRelationId, AccessExclusiveLock);
1579 :
1580 192 : tup = SearchSysCache2(SUBSCRIPTIONNAME, MyDatabaseId,
1581 192 : CStringGetDatum(stmt->subname));
1582 :
1583 192 : if (!HeapTupleIsValid(tup))
1584 : {
1585 12 : table_close(rel, NoLock);
1586 :
1587 12 : if (!stmt->missing_ok)
1588 6 : ereport(ERROR,
1589 : (errcode(ERRCODE_UNDEFINED_OBJECT),
1590 : errmsg("subscription \"%s\" does not exist",
1591 : stmt->subname)));
1592 : else
1593 6 : ereport(NOTICE,
1594 : (errmsg("subscription \"%s\" does not exist, skipping",
1595 : stmt->subname)));
1596 :
1597 78 : return;
1598 : }
1599 :
1600 180 : form = (Form_pg_subscription) GETSTRUCT(tup);
1601 180 : subid = form->oid;
1602 180 : subowner = form->subowner;
1603 180 : must_use_password = !superuser_arg(subowner) && form->subpasswordrequired;
1604 :
1605 : /* must be owner */
1606 180 : if (!object_ownercheck(SubscriptionRelationId, subid, GetUserId()))
1607 0 : aclcheck_error(ACLCHECK_NOT_OWNER, OBJECT_SUBSCRIPTION,
1608 0 : stmt->subname);
1609 :
1610 : /* DROP hook for the subscription being removed */
1611 180 : InvokeObjectDropHook(SubscriptionRelationId, subid, 0);
1612 :
1613 : /*
1614 : * Lock the subscription so nobody else can do anything with it (including
1615 : * the replication workers).
1616 : */
1617 180 : LockSharedObject(SubscriptionRelationId, subid, 0, AccessExclusiveLock);
1618 :
1619 : /* Get subname */
1620 180 : datum = SysCacheGetAttrNotNull(SUBSCRIPTIONOID, tup,
1621 : Anum_pg_subscription_subname);
1622 180 : subname = pstrdup(NameStr(*DatumGetName(datum)));
1623 :
1624 : /* Get conninfo */
1625 180 : datum = SysCacheGetAttrNotNull(SUBSCRIPTIONOID, tup,
1626 : Anum_pg_subscription_subconninfo);
1627 180 : conninfo = TextDatumGetCString(datum);
1628 :
1629 : /* Get slotname */
1630 180 : datum = SysCacheGetAttr(SUBSCRIPTIONOID, tup,
1631 : Anum_pg_subscription_subslotname, &isnull);
1632 180 : if (!isnull)
1633 108 : slotname = pstrdup(NameStr(*DatumGetName(datum)));
1634 : else
1635 72 : slotname = NULL;
1636 :
1637 : /*
1638 : * Since dropping a replication slot is not transactional, the replication
1639 : * slot stays dropped even if the transaction rolls back. So we cannot
1640 : * run DROP SUBSCRIPTION inside a transaction block if dropping the
1641 : * replication slot. Also, in this case, we report a message for dropping
1642 : * the subscription to the cumulative stats system.
1643 : *
1644 : * XXX The command name should really be something like "DROP SUBSCRIPTION
1645 : * of a subscription that is associated with a replication slot", but we
1646 : * don't have the proper facilities for that.
1647 : */
1648 180 : if (slotname)
1649 108 : PreventInTransactionBlock(isTopLevel, "DROP SUBSCRIPTION");
1650 :
1651 174 : ObjectAddressSet(myself, SubscriptionRelationId, subid);
1652 174 : EventTriggerSQLDropAddObject(&myself, true, true);
1653 :
1654 : /* Remove the tuple from catalog. */
1655 174 : CatalogTupleDelete(rel, &tup->t_self);
1656 :
1657 174 : ReleaseSysCache(tup);
1658 :
1659 : /*
1660 : * Stop all the subscription workers immediately.
1661 : *
1662 : * This is necessary if we are dropping the replication slot, so that the
1663 : * slot becomes accessible.
1664 : *
1665 : * It is also necessary if the subscription is disabled and was disabled
1666 : * in the same transaction. Then the workers haven't seen the disabling
1667 : * yet and will still be running, leading to hangs later when we want to
1668 : * drop the replication origin. If the subscription was disabled before
1669 : * this transaction, then there shouldn't be any workers left, so this
1670 : * won't make a difference.
1671 : *
1672 : * New workers won't be started because we hold an exclusive lock on the
1673 : * subscription till the end of the transaction.
1674 : */
1675 174 : LWLockAcquire(LogicalRepWorkerLock, LW_SHARED);
1676 174 : subworkers = logicalrep_workers_find(subid, false);
1677 174 : LWLockRelease(LogicalRepWorkerLock);
1678 282 : foreach(lc, subworkers)
1679 : {
1680 108 : LogicalRepWorker *w = (LogicalRepWorker *) lfirst(lc);
1681 :
1682 108 : logicalrep_worker_stop(w->subid, w->relid);
1683 : }
1684 174 : list_free(subworkers);
1685 :
1686 : /*
1687 : * Remove the no-longer-useful entry in the launcher's table of apply
1688 : * worker start times.
1689 : *
1690 : * If this transaction rolls back, the launcher might restart a failed
1691 : * apply worker before wal_retrieve_retry_interval milliseconds have
1692 : * elapsed, but that's pretty harmless.
1693 : */
1694 174 : ApplyLauncherForgetWorkerStartTime(subid);
1695 :
1696 : /*
1697 : * Cleanup of tablesync replication origins.
1698 : *
1699 : * Any READY-state relations would already have dealt with clean-ups.
1700 : *
1701 : * Note that the state can't change because we have already stopped both
1702 : * the apply and tablesync workers and they can't restart because of
1703 : * exclusive lock on the subscription.
1704 : */
1705 174 : rstates = GetSubscriptionRelations(subid, true);
1706 178 : foreach(lc, rstates)
1707 : {
1708 4 : SubscriptionRelState *rstate = (SubscriptionRelState *) lfirst(lc);
1709 4 : Oid relid = rstate->relid;
1710 :
1711 : /* Only cleanup resources of tablesync workers */
1712 4 : if (!OidIsValid(relid))
1713 0 : continue;
1714 :
1715 : /*
1716 : * Drop the tablesync's origin tracking if exists.
1717 : *
1718 : * It is possible that the origin is not yet created for tablesync
1719 : * worker so passing missing_ok = true. This can happen for the states
1720 : * before SUBREL_STATE_FINISHEDCOPY.
1721 : */
1722 4 : ReplicationOriginNameForLogicalRep(subid, relid, originname,
1723 : sizeof(originname));
1724 4 : replorigin_drop_by_name(originname, true, false);
1725 : }
1726 :
1727 : /* Clean up dependencies */
1728 174 : deleteSharedDependencyRecordsFor(SubscriptionRelationId, subid, 0);
1729 :
1730 : /* Remove any associated relation synchronization states. */
1731 174 : RemoveSubscriptionRel(subid, InvalidOid);
1732 :
1733 : /* Remove the origin tracking if exists. */
1734 174 : ReplicationOriginNameForLogicalRep(subid, InvalidOid, originname, sizeof(originname));
1735 174 : replorigin_drop_by_name(originname, true, false);
1736 :
1737 : /*
1738 : * Tell the cumulative stats system that the subscription is getting
1739 : * dropped.
1740 : */
1741 174 : pgstat_drop_subscription(subid);
1742 :
1743 : /*
1744 : * If there is no slot associated with the subscription, we can finish
1745 : * here.
1746 : */
1747 174 : if (!slotname && rstates == NIL)
1748 : {
1749 72 : table_close(rel, NoLock);
1750 72 : return;
1751 : }
1752 :
1753 : /*
1754 : * Try to acquire the connection necessary for dropping slots.
1755 : *
1756 : * Note: If the slotname is NONE/NULL then we allow the command to finish
1757 : * and users need to manually cleanup the apply and tablesync worker slots
1758 : * later.
1759 : *
1760 : * This has to be at the end because otherwise if there is an error while
1761 : * doing the database operations we won't be able to rollback dropped
1762 : * slot.
1763 : */
1764 102 : load_file("libpqwalreceiver", false);
1765 :
1766 102 : wrconn = walrcv_connect(conninfo, true, true, must_use_password,
1767 : subname, &err);
1768 102 : if (wrconn == NULL)
1769 : {
1770 0 : if (!slotname)
1771 : {
1772 : /* be tidy */
1773 0 : list_free(rstates);
1774 0 : table_close(rel, NoLock);
1775 0 : return;
1776 : }
1777 : else
1778 : {
1779 0 : ReportSlotConnectionError(rstates, subid, slotname, err);
1780 : }
1781 : }
1782 :
1783 102 : PG_TRY();
1784 : {
1785 106 : foreach(lc, rstates)
1786 : {
1787 4 : SubscriptionRelState *rstate = (SubscriptionRelState *) lfirst(lc);
1788 4 : Oid relid = rstate->relid;
1789 :
1790 : /* Only cleanup resources of tablesync workers */
1791 4 : if (!OidIsValid(relid))
1792 0 : continue;
1793 :
1794 : /*
1795 : * Drop the tablesync slots associated with removed tables.
1796 : *
1797 : * For SYNCDONE/READY states, the tablesync slot is known to have
1798 : * already been dropped by the tablesync worker.
1799 : *
1800 : * For other states, there is no certainty, maybe the slot does
1801 : * not exist yet. Also, if we fail after removing some of the
1802 : * slots, next time, it will again try to drop already dropped
1803 : * slots and fail. For these reasons, we allow missing_ok = true
1804 : * for the drop.
1805 : */
1806 4 : if (rstate->state != SUBREL_STATE_SYNCDONE)
1807 : {
1808 4 : char syncslotname[NAMEDATALEN] = {0};
1809 :
1810 4 : ReplicationSlotNameForTablesync(subid, relid, syncslotname,
1811 : sizeof(syncslotname));
1812 4 : ReplicationSlotDropAtPubNode(wrconn, syncslotname, true);
1813 : }
1814 : }
1815 :
1816 102 : list_free(rstates);
1817 :
1818 : /*
1819 : * If there is a slot associated with the subscription, then drop the
1820 : * replication slot at the publisher.
1821 : */
1822 102 : if (slotname)
1823 102 : ReplicationSlotDropAtPubNode(wrconn, slotname, false);
1824 : }
1825 0 : PG_FINALLY();
1826 : {
1827 102 : walrcv_disconnect(wrconn);
1828 : }
1829 102 : PG_END_TRY();
1830 :
1831 102 : table_close(rel, NoLock);
1832 : }
1833 :
1834 : /*
1835 : * Drop the replication slot at the publisher node using the replication
1836 : * connection.
1837 : *
1838 : * missing_ok - if true then only issue a LOG message if the slot doesn't
1839 : * exist.
1840 : */
1841 : void
1842 446 : ReplicationSlotDropAtPubNode(WalReceiverConn *wrconn, char *slotname, bool missing_ok)
1843 : {
1844 : StringInfoData cmd;
1845 :
1846 : Assert(wrconn);
1847 :
1848 446 : load_file("libpqwalreceiver", false);
1849 :
1850 446 : initStringInfo(&cmd);
1851 446 : appendStringInfo(&cmd, "DROP_REPLICATION_SLOT %s WAIT", quote_identifier(slotname));
1852 :
1853 446 : PG_TRY();
1854 : {
1855 : WalRcvExecResult *res;
1856 :
1857 446 : res = walrcv_exec(wrconn, cmd.data, 0, NULL);
1858 :
1859 446 : if (res->status == WALRCV_OK_COMMAND)
1860 : {
1861 : /* NOTICE. Success. */
1862 444 : ereport(NOTICE,
1863 : (errmsg("dropped replication slot \"%s\" on publisher",
1864 : slotname)));
1865 : }
1866 2 : else if (res->status == WALRCV_ERROR &&
1867 2 : missing_ok &&
1868 2 : res->sqlstate == ERRCODE_UNDEFINED_OBJECT)
1869 : {
1870 : /* LOG. Error, but missing_ok = true. */
1871 2 : ereport(LOG,
1872 : (errmsg("could not drop replication slot \"%s\" on publisher: %s",
1873 : slotname, res->err)));
1874 : }
1875 : else
1876 : {
1877 : /* ERROR. */
1878 0 : ereport(ERROR,
1879 : (errcode(ERRCODE_CONNECTION_FAILURE),
1880 : errmsg("could not drop replication slot \"%s\" on publisher: %s",
1881 : slotname, res->err)));
1882 : }
1883 :
1884 446 : walrcv_clear_result(res);
1885 : }
1886 0 : PG_FINALLY();
1887 : {
1888 446 : pfree(cmd.data);
1889 : }
1890 446 : PG_END_TRY();
1891 446 : }
1892 :
1893 : /*
1894 : * Internal workhorse for changing a subscription owner
1895 : */
1896 : static void
1897 18 : AlterSubscriptionOwner_internal(Relation rel, HeapTuple tup, Oid newOwnerId)
1898 : {
1899 : Form_pg_subscription form;
1900 : AclResult aclresult;
1901 :
1902 18 : form = (Form_pg_subscription) GETSTRUCT(tup);
1903 :
1904 18 : if (form->subowner == newOwnerId)
1905 4 : return;
1906 :
1907 14 : if (!object_ownercheck(SubscriptionRelationId, form->oid, GetUserId()))
1908 0 : aclcheck_error(ACLCHECK_NOT_OWNER, OBJECT_SUBSCRIPTION,
1909 0 : NameStr(form->subname));
1910 :
1911 : /*
1912 : * Don't allow non-superuser modification of a subscription with
1913 : * password_required=false.
1914 : */
1915 14 : if (!form->subpasswordrequired && !superuser())
1916 0 : ereport(ERROR,
1917 : (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
1918 : errmsg("password_required=false is superuser-only"),
1919 : errhint("Subscriptions with the password_required option set to false may only be created or modified by the superuser.")));
1920 :
1921 : /* Must be able to become new owner */
1922 14 : check_can_set_role(GetUserId(), newOwnerId);
1923 :
1924 : /*
1925 : * current owner must have CREATE on database
1926 : *
1927 : * This is consistent with how ALTER SCHEMA ... OWNER TO works, but some
1928 : * other object types behave differently (e.g. you can't give a table to a
1929 : * user who lacks CREATE privileges on a schema).
1930 : */
1931 8 : aclresult = object_aclcheck(DatabaseRelationId, MyDatabaseId,
1932 : GetUserId(), ACL_CREATE);
1933 8 : if (aclresult != ACLCHECK_OK)
1934 0 : aclcheck_error(aclresult, OBJECT_DATABASE,
1935 0 : get_database_name(MyDatabaseId));
1936 :
1937 8 : form->subowner = newOwnerId;
1938 8 : CatalogTupleUpdate(rel, &tup->t_self, tup);
1939 :
1940 : /* Update owner dependency reference */
1941 8 : changeDependencyOnOwner(SubscriptionRelationId,
1942 : form->oid,
1943 : newOwnerId);
1944 :
1945 8 : InvokeObjectPostAlterHook(SubscriptionRelationId,
1946 : form->oid, 0);
1947 :
1948 : /* Wake up related background processes to handle this change quickly. */
1949 8 : ApplyLauncherWakeupAtCommit();
1950 8 : LogicalRepWorkersWakeupAtCommit(form->oid);
1951 : }
1952 :
1953 : /*
1954 : * Change subscription owner -- by name
1955 : */
1956 : ObjectAddress
1957 18 : AlterSubscriptionOwner(const char *name, Oid newOwnerId)
1958 : {
1959 : Oid subid;
1960 : HeapTuple tup;
1961 : Relation rel;
1962 : ObjectAddress address;
1963 : Form_pg_subscription form;
1964 :
1965 18 : rel = table_open(SubscriptionRelationId, RowExclusiveLock);
1966 :
1967 18 : tup = SearchSysCacheCopy2(SUBSCRIPTIONNAME, MyDatabaseId,
1968 : CStringGetDatum(name));
1969 :
1970 18 : if (!HeapTupleIsValid(tup))
1971 0 : ereport(ERROR,
1972 : (errcode(ERRCODE_UNDEFINED_OBJECT),
1973 : errmsg("subscription \"%s\" does not exist", name)));
1974 :
1975 18 : form = (Form_pg_subscription) GETSTRUCT(tup);
1976 18 : subid = form->oid;
1977 :
1978 18 : AlterSubscriptionOwner_internal(rel, tup, newOwnerId);
1979 :
1980 12 : ObjectAddressSet(address, SubscriptionRelationId, subid);
1981 :
1982 12 : heap_freetuple(tup);
1983 :
1984 12 : table_close(rel, RowExclusiveLock);
1985 :
1986 12 : return address;
1987 : }
1988 :
1989 : /*
1990 : * Change subscription owner -- by OID
1991 : */
1992 : void
1993 0 : AlterSubscriptionOwner_oid(Oid subid, Oid newOwnerId)
1994 : {
1995 : HeapTuple tup;
1996 : Relation rel;
1997 :
1998 0 : rel = table_open(SubscriptionRelationId, RowExclusiveLock);
1999 :
2000 0 : tup = SearchSysCacheCopy1(SUBSCRIPTIONOID, ObjectIdGetDatum(subid));
2001 :
2002 0 : if (!HeapTupleIsValid(tup))
2003 0 : ereport(ERROR,
2004 : (errcode(ERRCODE_UNDEFINED_OBJECT),
2005 : errmsg("subscription with OID %u does not exist", subid)));
2006 :
2007 0 : AlterSubscriptionOwner_internal(rel, tup, newOwnerId);
2008 :
2009 0 : heap_freetuple(tup);
2010 :
2011 0 : table_close(rel, RowExclusiveLock);
2012 0 : }
2013 :
2014 : /*
2015 : * Check and log a warning if the publisher has subscribed to the same table
2016 : * from some other publisher. This check is required only if "copy_data = true"
2017 : * and "origin = none" for CREATE SUBSCRIPTION and
2018 : * ALTER SUBSCRIPTION ... REFRESH statements to notify the user that data
2019 : * having origin might have been copied.
2020 : *
2021 : * This check need not be performed on the tables that are already added
2022 : * because incremental sync for those tables will happen through WAL and the
2023 : * origin of the data can be identified from the WAL records.
2024 : *
2025 : * subrel_local_oids contains the list of relation oids that are already
2026 : * present on the subscriber.
2027 : */
2028 : static void
2029 256 : check_publications_origin(WalReceiverConn *wrconn, List *publications,
2030 : bool copydata, char *origin, Oid *subrel_local_oids,
2031 : int subrel_count, char *subname)
2032 : {
2033 : WalRcvExecResult *res;
2034 : StringInfoData cmd;
2035 : TupleTableSlot *slot;
2036 256 : Oid tableRow[1] = {TEXTOID};
2037 256 : List *publist = NIL;
2038 : int i;
2039 :
2040 490 : if (!copydata || !origin ||
2041 234 : (pg_strcasecmp(origin, LOGICALREP_ORIGIN_NONE) != 0))
2042 244 : return;
2043 :
2044 12 : initStringInfo(&cmd);
2045 12 : appendStringInfoString(&cmd,
2046 : "SELECT DISTINCT P.pubname AS pubname\n"
2047 : "FROM pg_publication P,\n"
2048 : " LATERAL pg_get_publication_tables(P.pubname) GPT\n"
2049 : " JOIN pg_subscription_rel PS ON (GPT.relid = PS.srrelid),\n"
2050 : " pg_class C JOIN pg_namespace N ON (N.oid = C.relnamespace)\n"
2051 : "WHERE C.oid = GPT.relid AND P.pubname IN (");
2052 12 : get_publications_str(publications, &cmd, true);
2053 12 : appendStringInfoString(&cmd, ")\n");
2054 :
2055 : /*
2056 : * In case of ALTER SUBSCRIPTION ... REFRESH, subrel_local_oids contains
2057 : * the list of relation oids that are already present on the subscriber.
2058 : * This check should be skipped for these tables.
2059 : */
2060 18 : for (i = 0; i < subrel_count; i++)
2061 : {
2062 6 : Oid relid = subrel_local_oids[i];
2063 6 : char *schemaname = get_namespace_name(get_rel_namespace(relid));
2064 6 : char *tablename = get_rel_name(relid);
2065 :
2066 6 : appendStringInfo(&cmd, "AND NOT (N.nspname = '%s' AND C.relname = '%s')\n",
2067 : schemaname, tablename);
2068 : }
2069 :
2070 12 : res = walrcv_exec(wrconn, cmd.data, 1, tableRow);
2071 12 : pfree(cmd.data);
2072 :
2073 12 : if (res->status != WALRCV_OK_TUPLES)
2074 0 : ereport(ERROR,
2075 : (errcode(ERRCODE_CONNECTION_FAILURE),
2076 : errmsg("could not receive list of replicated tables from the publisher: %s",
2077 : res->err)));
2078 :
2079 : /* Process tables. */
2080 12 : slot = MakeSingleTupleTableSlot(res->tupledesc, &TTSOpsMinimalTuple);
2081 16 : while (tuplestore_gettupleslot(res->tuplestore, true, false, slot))
2082 : {
2083 : char *pubname;
2084 : bool isnull;
2085 :
2086 4 : pubname = TextDatumGetCString(slot_getattr(slot, 1, &isnull));
2087 : Assert(!isnull);
2088 :
2089 4 : ExecClearTuple(slot);
2090 4 : publist = list_append_unique(publist, makeString(pubname));
2091 : }
2092 :
2093 : /*
2094 : * Log a warning if the publisher has subscribed to the same table from
2095 : * some other publisher. We cannot know the origin of data during the
2096 : * initial sync. Data origins can be found only from the WAL by looking at
2097 : * the origin id.
2098 : *
2099 : * XXX: For simplicity, we don't check whether the table has any data or
2100 : * not. If the table doesn't have any data then we don't need to
2101 : * distinguish between data having origin and data not having origin so we
2102 : * can avoid logging a warning in that case.
2103 : */
2104 12 : if (publist)
2105 : {
2106 4 : StringInfo pubnames = makeStringInfo();
2107 :
2108 : /* Prepare the list of publication(s) for warning message. */
2109 4 : get_publications_str(publist, pubnames, false);
2110 4 : ereport(WARNING,
2111 : errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
2112 : errmsg("subscription \"%s\" requested copy_data with origin = NONE but might copy data that had a different origin",
2113 : subname),
2114 : errdetail_plural("The subscription being created subscribes to a publication (%s) that contains tables that are written to by other subscriptions.",
2115 : "The subscription being created subscribes to publications (%s) that contain tables that are written to by other subscriptions.",
2116 : list_length(publist), pubnames->data),
2117 : errhint("Verify that initial data copied from the publisher tables did not come from other origins."));
2118 : }
2119 :
2120 12 : ExecDropSingleTupleTableSlot(slot);
2121 :
2122 12 : walrcv_clear_result(res);
2123 : }
2124 :
2125 : /*
2126 : * Get the list of tables which belong to specified publications on the
2127 : * publisher connection.
2128 : *
2129 : * Note that we don't support the case where the column list is different for
2130 : * the same table in different publications to avoid sending unwanted column
2131 : * information for some of the rows. This can happen when both the column
2132 : * list and row filter are specified for different publications.
2133 : */
2134 : static List *
2135 256 : fetch_table_list(WalReceiverConn *wrconn, List *publications)
2136 : {
2137 : WalRcvExecResult *res;
2138 : StringInfoData cmd;
2139 : TupleTableSlot *slot;
2140 256 : Oid tableRow[3] = {TEXTOID, TEXTOID, InvalidOid};
2141 256 : List *tablelist = NIL;
2142 256 : int server_version = walrcv_server_version(wrconn);
2143 256 : bool check_columnlist = (server_version >= 150000);
2144 :
2145 256 : initStringInfo(&cmd);
2146 :
2147 : /* Get the list of tables from the publisher. */
2148 256 : if (server_version >= 160000)
2149 : {
2150 : StringInfoData pub_names;
2151 :
2152 256 : tableRow[2] = INT2VECTOROID;
2153 256 : initStringInfo(&pub_names);
2154 256 : get_publications_str(publications, &pub_names, true);
2155 :
2156 : /*
2157 : * From version 16, we allowed passing multiple publications to the
2158 : * function pg_get_publication_tables. This helped to filter out the
2159 : * partition table whose ancestor is also published in this
2160 : * publication array.
2161 : *
2162 : * Join pg_get_publication_tables with pg_publication to exclude
2163 : * non-existing publications.
2164 : *
2165 : * Note that attrs are always stored in sorted order so we don't need
2166 : * to worry if different publications have specified them in a
2167 : * different order. See publication_translate_columns.
2168 : */
2169 256 : appendStringInfo(&cmd, "SELECT DISTINCT n.nspname, c.relname, gpt.attrs\n"
2170 : " FROM pg_class c\n"
2171 : " JOIN pg_namespace n ON n.oid = c.relnamespace\n"
2172 : " JOIN ( SELECT (pg_get_publication_tables(VARIADIC array_agg(pubname::text))).*\n"
2173 : " FROM pg_publication\n"
2174 : " WHERE pubname IN ( %s )) AS gpt\n"
2175 : " ON gpt.relid = c.oid\n",
2176 : pub_names.data);
2177 :
2178 256 : pfree(pub_names.data);
2179 : }
2180 : else
2181 : {
2182 0 : tableRow[2] = NAMEARRAYOID;
2183 0 : appendStringInfoString(&cmd, "SELECT DISTINCT t.schemaname, t.tablename \n");
2184 :
2185 : /* Get column lists for each relation if the publisher supports it */
2186 0 : if (check_columnlist)
2187 0 : appendStringInfoString(&cmd, ", t.attnames\n");
2188 :
2189 0 : appendStringInfoString(&cmd, "FROM pg_catalog.pg_publication_tables t\n"
2190 : " WHERE t.pubname IN (");
2191 0 : get_publications_str(publications, &cmd, true);
2192 0 : appendStringInfoChar(&cmd, ')');
2193 : }
2194 :
2195 256 : res = walrcv_exec(wrconn, cmd.data, check_columnlist ? 3 : 2, tableRow);
2196 256 : pfree(cmd.data);
2197 :
2198 256 : if (res->status != WALRCV_OK_TUPLES)
2199 0 : ereport(ERROR,
2200 : (errcode(ERRCODE_CONNECTION_FAILURE),
2201 : errmsg("could not receive list of replicated tables from the publisher: %s",
2202 : res->err)));
2203 :
2204 : /* Process tables. */
2205 256 : slot = MakeSingleTupleTableSlot(res->tupledesc, &TTSOpsMinimalTuple);
2206 730 : while (tuplestore_gettupleslot(res->tuplestore, true, false, slot))
2207 : {
2208 : char *nspname;
2209 : char *relname;
2210 : bool isnull;
2211 : RangeVar *rv;
2212 :
2213 476 : nspname = TextDatumGetCString(slot_getattr(slot, 1, &isnull));
2214 : Assert(!isnull);
2215 476 : relname = TextDatumGetCString(slot_getattr(slot, 2, &isnull));
2216 : Assert(!isnull);
2217 :
2218 476 : rv = makeRangeVar(nspname, relname, -1);
2219 :
2220 476 : if (check_columnlist && list_member(tablelist, rv))
2221 2 : ereport(ERROR,
2222 : errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
2223 : errmsg("cannot use different column lists for table \"%s.%s\" in different publications",
2224 : nspname, relname));
2225 : else
2226 474 : tablelist = lappend(tablelist, rv);
2227 :
2228 474 : ExecClearTuple(slot);
2229 : }
2230 254 : ExecDropSingleTupleTableSlot(slot);
2231 :
2232 254 : walrcv_clear_result(res);
2233 :
2234 254 : return tablelist;
2235 : }
2236 :
2237 : /*
2238 : * This is to report the connection failure while dropping replication slots.
2239 : * Here, we report the WARNING for all tablesync slots so that user can drop
2240 : * them manually, if required.
2241 : */
2242 : static void
2243 0 : ReportSlotConnectionError(List *rstates, Oid subid, char *slotname, char *err)
2244 : {
2245 : ListCell *lc;
2246 :
2247 0 : foreach(lc, rstates)
2248 : {
2249 0 : SubscriptionRelState *rstate = (SubscriptionRelState *) lfirst(lc);
2250 0 : Oid relid = rstate->relid;
2251 :
2252 : /* Only cleanup resources of tablesync workers */
2253 0 : if (!OidIsValid(relid))
2254 0 : continue;
2255 :
2256 : /*
2257 : * Caller needs to ensure that relstate doesn't change underneath us.
2258 : * See DropSubscription where we get the relstates.
2259 : */
2260 0 : if (rstate->state != SUBREL_STATE_SYNCDONE)
2261 : {
2262 0 : char syncslotname[NAMEDATALEN] = {0};
2263 :
2264 0 : ReplicationSlotNameForTablesync(subid, relid, syncslotname,
2265 : sizeof(syncslotname));
2266 0 : elog(WARNING, "could not drop tablesync replication slot \"%s\"",
2267 : syncslotname);
2268 : }
2269 : }
2270 :
2271 0 : ereport(ERROR,
2272 : (errcode(ERRCODE_CONNECTION_FAILURE),
2273 : errmsg("could not connect to publisher when attempting to drop replication slot \"%s\": %s",
2274 : slotname, err),
2275 : /* translator: %s is an SQL ALTER command */
2276 : errhint("Use %s to disable the subscription, and then use %s to disassociate it from the slot.",
2277 : "ALTER SUBSCRIPTION ... DISABLE",
2278 : "ALTER SUBSCRIPTION ... SET (slot_name = NONE)")));
2279 : }
2280 :
2281 : /*
2282 : * Check for duplicates in the given list of publications and error out if
2283 : * found one. Add publications to datums as text datums, if datums is not
2284 : * NULL.
2285 : */
2286 : static void
2287 390 : check_duplicates_in_publist(List *publist, Datum *datums)
2288 : {
2289 : ListCell *cell;
2290 390 : int j = 0;
2291 :
2292 902 : foreach(cell, publist)
2293 : {
2294 530 : char *name = strVal(lfirst(cell));
2295 : ListCell *pcell;
2296 :
2297 802 : foreach(pcell, publist)
2298 : {
2299 802 : char *pname = strVal(lfirst(pcell));
2300 :
2301 802 : if (pcell == cell)
2302 512 : break;
2303 :
2304 290 : if (strcmp(name, pname) == 0)
2305 18 : ereport(ERROR,
2306 : (errcode(ERRCODE_DUPLICATE_OBJECT),
2307 : errmsg("publication name \"%s\" used more than once",
2308 : pname)));
2309 : }
2310 :
2311 512 : if (datums)
2312 426 : datums[j++] = CStringGetTextDatum(name);
2313 : }
2314 372 : }
2315 :
2316 : /*
2317 : * Merge current subscription's publications and user-specified publications
2318 : * from ADD/DROP PUBLICATIONS.
2319 : *
2320 : * If addpub is true, we will add the list of publications into oldpublist.
2321 : * Otherwise, we will delete the list of publications from oldpublist. The
2322 : * returned list is a copy, oldpublist itself is not changed.
2323 : *
2324 : * subname is the subscription name, for error messages.
2325 : */
2326 : static List *
2327 54 : merge_publications(List *oldpublist, List *newpublist, bool addpub, const char *subname)
2328 : {
2329 : ListCell *lc;
2330 :
2331 54 : oldpublist = list_copy(oldpublist);
2332 :
2333 54 : check_duplicates_in_publist(newpublist, NULL);
2334 :
2335 92 : foreach(lc, newpublist)
2336 : {
2337 68 : char *name = strVal(lfirst(lc));
2338 : ListCell *lc2;
2339 68 : bool found = false;
2340 :
2341 134 : foreach(lc2, oldpublist)
2342 : {
2343 110 : char *pubname = strVal(lfirst(lc2));
2344 :
2345 110 : if (strcmp(name, pubname) == 0)
2346 : {
2347 44 : found = true;
2348 44 : if (addpub)
2349 12 : ereport(ERROR,
2350 : (errcode(ERRCODE_DUPLICATE_OBJECT),
2351 : errmsg("publication \"%s\" is already in subscription \"%s\"",
2352 : name, subname)));
2353 : else
2354 32 : oldpublist = foreach_delete_current(oldpublist, lc2);
2355 :
2356 32 : break;
2357 : }
2358 : }
2359 :
2360 56 : if (addpub && !found)
2361 18 : oldpublist = lappend(oldpublist, makeString(name));
2362 38 : else if (!addpub && !found)
2363 6 : ereport(ERROR,
2364 : (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
2365 : errmsg("publication \"%s\" is not in subscription \"%s\"",
2366 : name, subname)));
2367 : }
2368 :
2369 : /*
2370 : * XXX Probably no strong reason for this, but for now it's to make ALTER
2371 : * SUBSCRIPTION ... DROP PUBLICATION consistent with SET PUBLICATION.
2372 : */
2373 24 : if (!oldpublist)
2374 6 : ereport(ERROR,
2375 : (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
2376 : errmsg("cannot drop all the publications from a subscription")));
2377 :
2378 18 : return oldpublist;
2379 : }
2380 :
2381 : /*
2382 : * Extract the streaming mode value from a DefElem. This is like
2383 : * defGetBoolean() but also accepts the special value of "parallel".
2384 : */
2385 : char
2386 132 : defGetStreamingMode(DefElem *def)
2387 : {
2388 : /*
2389 : * If no parameter value given, assume "true" is meant.
2390 : */
2391 132 : if (!def->arg)
2392 0 : return LOGICALREP_STREAM_ON;
2393 :
2394 : /*
2395 : * Allow 0, 1, "false", "true", "off", "on" or "parallel".
2396 : */
2397 132 : switch (nodeTag(def->arg))
2398 : {
2399 0 : case T_Integer:
2400 0 : switch (intVal(def->arg))
2401 : {
2402 0 : case 0:
2403 0 : return LOGICALREP_STREAM_OFF;
2404 0 : case 1:
2405 0 : return LOGICALREP_STREAM_ON;
2406 0 : default:
2407 : /* otherwise, error out below */
2408 0 : break;
2409 : }
2410 0 : break;
2411 132 : default:
2412 : {
2413 132 : char *sval = defGetString(def);
2414 :
2415 : /*
2416 : * The set of strings accepted here should match up with the
2417 : * grammar's opt_boolean_or_string production.
2418 : */
2419 258 : if (pg_strcasecmp(sval, "false") == 0 ||
2420 126 : pg_strcasecmp(sval, "off") == 0)
2421 6 : return LOGICALREP_STREAM_OFF;
2422 234 : if (pg_strcasecmp(sval, "true") == 0 ||
2423 108 : pg_strcasecmp(sval, "on") == 0)
2424 90 : return LOGICALREP_STREAM_ON;
2425 36 : if (pg_strcasecmp(sval, "parallel") == 0)
2426 30 : return LOGICALREP_STREAM_PARALLEL;
2427 : }
2428 6 : break;
2429 : }
2430 :
2431 6 : ereport(ERROR,
2432 : (errcode(ERRCODE_SYNTAX_ERROR),
2433 : errmsg("%s requires a Boolean value or \"parallel\"",
2434 : def->defname)));
2435 : return LOGICALREP_STREAM_OFF; /* keep compiler quiet */
2436 : }
|
