Line data Source code
1 : /*-------------------------------------------------------------------------
2 : *
3 : * subscriptioncmds.c
4 : * subscription catalog manipulation functions
5 : *
6 : * Portions Copyright (c) 1996-2026, 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/commit_ts.h"
18 : #include "access/htup_details.h"
19 : #include "access/table.h"
20 : #include "access/twophase.h"
21 : #include "access/xact.h"
22 : #include "catalog/catalog.h"
23 : #include "catalog/dependency.h"
24 : #include "catalog/indexing.h"
25 : #include "catalog/namespace.h"
26 : #include "catalog/objectaccess.h"
27 : #include "catalog/objectaddress.h"
28 : #include "catalog/pg_authid_d.h"
29 : #include "catalog/pg_database_d.h"
30 : #include "catalog/pg_foreign_server.h"
31 : #include "catalog/pg_subscription.h"
32 : #include "catalog/pg_subscription_rel.h"
33 : #include "catalog/pg_type.h"
34 : #include "catalog/pg_user_mapping.h"
35 : #include "commands/defrem.h"
36 : #include "commands/event_trigger.h"
37 : #include "commands/subscriptioncmds.h"
38 : #include "executor/executor.h"
39 : #include "foreign/foreign.h"
40 : #include "miscadmin.h"
41 : #include "nodes/makefuncs.h"
42 : #include "pgstat.h"
43 : #include "replication/logicallauncher.h"
44 : #include "replication/logicalworker.h"
45 : #include "replication/origin.h"
46 : #include "replication/slot.h"
47 : #include "replication/walreceiver.h"
48 : #include "replication/walsender.h"
49 : #include "replication/worker_internal.h"
50 : #include "storage/lmgr.h"
51 : #include "utils/acl.h"
52 : #include "utils/builtins.h"
53 : #include "utils/guc.h"
54 : #include "utils/lsyscache.h"
55 : #include "utils/memutils.h"
56 : #include "utils/pg_lsn.h"
57 : #include "utils/syscache.h"
58 :
59 : /*
60 : * Options that can be specified by the user in CREATE/ALTER SUBSCRIPTION
61 : * command.
62 : */
63 : #define SUBOPT_CONNECT 0x00000001
64 : #define SUBOPT_ENABLED 0x00000002
65 : #define SUBOPT_CREATE_SLOT 0x00000004
66 : #define SUBOPT_SLOT_NAME 0x00000008
67 : #define SUBOPT_COPY_DATA 0x00000010
68 : #define SUBOPT_SYNCHRONOUS_COMMIT 0x00000020
69 : #define SUBOPT_REFRESH 0x00000040
70 : #define SUBOPT_BINARY 0x00000080
71 : #define SUBOPT_STREAMING 0x00000100
72 : #define SUBOPT_TWOPHASE_COMMIT 0x00000200
73 : #define SUBOPT_DISABLE_ON_ERR 0x00000400
74 : #define SUBOPT_PASSWORD_REQUIRED 0x00000800
75 : #define SUBOPT_RUN_AS_OWNER 0x00001000
76 : #define SUBOPT_FAILOVER 0x00002000
77 : #define SUBOPT_RETAIN_DEAD_TUPLES 0x00004000
78 : #define SUBOPT_MAX_RETENTION_DURATION 0x00008000
79 : #define SUBOPT_WAL_RECEIVER_TIMEOUT 0x00010000
80 : #define SUBOPT_LSN 0x00020000
81 : #define SUBOPT_ORIGIN 0x00040000
82 :
83 : /* check if the 'val' has 'bits' set */
84 : #define IsSet(val, bits) (((val) & (bits)) == (bits))
85 :
86 : /*
87 : * Structure to hold a bitmap representing the user-provided CREATE/ALTER
88 : * SUBSCRIPTION command options and the parsed/default values of each of them.
89 : */
90 : typedef struct SubOpts
91 : {
92 : bits32 specified_opts;
93 : char *slot_name;
94 : char *synchronous_commit;
95 : bool connect;
96 : bool enabled;
97 : bool create_slot;
98 : bool copy_data;
99 : bool refresh;
100 : bool binary;
101 : char streaming;
102 : bool twophase;
103 : bool disableonerr;
104 : bool passwordrequired;
105 : bool runasowner;
106 : bool failover;
107 : bool retaindeadtuples;
108 : int32 maxretention;
109 : char *origin;
110 : XLogRecPtr lsn;
111 : char *wal_receiver_timeout;
112 : } SubOpts;
113 :
114 : /*
115 : * PublicationRelKind represents a relation included in a publication.
116 : * It stores the schema-qualified relation name (rv) and its kind (relkind).
117 : */
118 : typedef struct PublicationRelKind
119 : {
120 : RangeVar *rv;
121 : char relkind;
122 : } PublicationRelKind;
123 :
124 : static List *fetch_relation_list(WalReceiverConn *wrconn, List *publications);
125 : static void check_publications_origin_tables(WalReceiverConn *wrconn,
126 : List *publications, bool copydata,
127 : bool retain_dead_tuples,
128 : char *origin,
129 : Oid *subrel_local_oids,
130 : int subrel_count, char *subname);
131 : static void check_publications_origin_sequences(WalReceiverConn *wrconn,
132 : List *publications,
133 : bool copydata, char *origin,
134 : Oid *subrel_local_oids,
135 : int subrel_count,
136 : char *subname);
137 : static void check_pub_dead_tuple_retention(WalReceiverConn *wrconn);
138 : static void check_duplicates_in_publist(List *publist, Datum *datums);
139 : static List *merge_publications(List *oldpublist, List *newpublist, bool addpub, const char *subname);
140 : static void ReportSlotConnectionError(List *rstates, Oid subid, char *slotname, char *err);
141 : static void CheckAlterSubOption(Subscription *sub, const char *option,
142 : bool slot_needs_update, bool isTopLevel);
143 :
144 :
145 : /*
146 : * Common option parsing function for CREATE and ALTER SUBSCRIPTION commands.
147 : *
148 : * Since not all options can be specified in both commands, this function
149 : * will report an error if mutually exclusive options are specified.
150 : */
151 : static void
152 521 : parse_subscription_options(ParseState *pstate, List *stmt_options,
153 : bits32 supported_opts, SubOpts *opts)
154 : {
155 : ListCell *lc;
156 :
157 : /* Start out with cleared opts. */
158 521 : memset(opts, 0, sizeof(SubOpts));
159 :
160 : /* caller must expect some option */
161 : Assert(supported_opts != 0);
162 :
163 : /* If connect option is supported, these others also need to be. */
164 : Assert(!IsSet(supported_opts, SUBOPT_CONNECT) ||
165 : IsSet(supported_opts, SUBOPT_ENABLED | SUBOPT_CREATE_SLOT |
166 : SUBOPT_COPY_DATA));
167 :
168 : /* Set default values for the supported options. */
169 521 : if (IsSet(supported_opts, SUBOPT_CONNECT))
170 261 : opts->connect = true;
171 521 : if (IsSet(supported_opts, SUBOPT_ENABLED))
172 314 : opts->enabled = true;
173 521 : if (IsSet(supported_opts, SUBOPT_CREATE_SLOT))
174 261 : opts->create_slot = true;
175 521 : if (IsSet(supported_opts, SUBOPT_COPY_DATA))
176 335 : opts->copy_data = true;
177 521 : if (IsSet(supported_opts, SUBOPT_REFRESH))
178 43 : opts->refresh = true;
179 521 : if (IsSet(supported_opts, SUBOPT_BINARY))
180 382 : opts->binary = false;
181 521 : if (IsSet(supported_opts, SUBOPT_STREAMING))
182 382 : opts->streaming = LOGICALREP_STREAM_PARALLEL;
183 521 : if (IsSet(supported_opts, SUBOPT_TWOPHASE_COMMIT))
184 382 : opts->twophase = false;
185 521 : if (IsSet(supported_opts, SUBOPT_DISABLE_ON_ERR))
186 382 : opts->disableonerr = false;
187 521 : if (IsSet(supported_opts, SUBOPT_PASSWORD_REQUIRED))
188 382 : opts->passwordrequired = true;
189 521 : if (IsSet(supported_opts, SUBOPT_RUN_AS_OWNER))
190 382 : opts->runasowner = false;
191 521 : if (IsSet(supported_opts, SUBOPT_FAILOVER))
192 382 : opts->failover = false;
193 521 : if (IsSet(supported_opts, SUBOPT_RETAIN_DEAD_TUPLES))
194 382 : opts->retaindeadtuples = false;
195 521 : if (IsSet(supported_opts, SUBOPT_MAX_RETENTION_DURATION))
196 382 : opts->maxretention = 0;
197 521 : if (IsSet(supported_opts, SUBOPT_ORIGIN))
198 382 : opts->origin = pstrdup(LOGICALREP_ORIGIN_ANY);
199 :
200 : /* Parse options */
201 1037 : foreach(lc, stmt_options)
202 : {
203 552 : DefElem *defel = (DefElem *) lfirst(lc);
204 :
205 552 : if (IsSet(supported_opts, SUBOPT_CONNECT) &&
206 326 : strcmp(defel->defname, "connect") == 0)
207 : {
208 108 : if (IsSet(opts->specified_opts, SUBOPT_CONNECT))
209 0 : errorConflictingDefElem(defel, pstate);
210 :
211 108 : opts->specified_opts |= SUBOPT_CONNECT;
212 108 : opts->connect = defGetBoolean(defel);
213 : }
214 444 : else if (IsSet(supported_opts, SUBOPT_ENABLED) &&
215 271 : strcmp(defel->defname, "enabled") == 0)
216 : {
217 73 : if (IsSet(opts->specified_opts, SUBOPT_ENABLED))
218 0 : errorConflictingDefElem(defel, pstate);
219 :
220 73 : opts->specified_opts |= SUBOPT_ENABLED;
221 73 : opts->enabled = defGetBoolean(defel);
222 : }
223 371 : else if (IsSet(supported_opts, SUBOPT_CREATE_SLOT) &&
224 198 : strcmp(defel->defname, "create_slot") == 0)
225 : {
226 20 : if (IsSet(opts->specified_opts, SUBOPT_CREATE_SLOT))
227 0 : errorConflictingDefElem(defel, pstate);
228 :
229 20 : opts->specified_opts |= SUBOPT_CREATE_SLOT;
230 20 : opts->create_slot = defGetBoolean(defel);
231 : }
232 351 : else if (IsSet(supported_opts, SUBOPT_SLOT_NAME) &&
233 301 : strcmp(defel->defname, "slot_name") == 0)
234 : {
235 95 : if (IsSet(opts->specified_opts, SUBOPT_SLOT_NAME))
236 0 : errorConflictingDefElem(defel, pstate);
237 :
238 95 : opts->specified_opts |= SUBOPT_SLOT_NAME;
239 95 : opts->slot_name = defGetString(defel);
240 :
241 : /* Setting slot_name = NONE is treated as no slot name. */
242 187 : if (strcmp(opts->slot_name, "none") == 0)
243 74 : opts->slot_name = NULL;
244 : else
245 21 : ReplicationSlotValidateName(opts->slot_name, false, ERROR);
246 : }
247 256 : else if (IsSet(supported_opts, SUBOPT_COPY_DATA) &&
248 163 : strcmp(defel->defname, "copy_data") == 0)
249 : {
250 29 : if (IsSet(opts->specified_opts, SUBOPT_COPY_DATA))
251 0 : errorConflictingDefElem(defel, pstate);
252 :
253 29 : opts->specified_opts |= SUBOPT_COPY_DATA;
254 29 : opts->copy_data = defGetBoolean(defel);
255 : }
256 227 : else if (IsSet(supported_opts, SUBOPT_SYNCHRONOUS_COMMIT) &&
257 182 : strcmp(defel->defname, "synchronous_commit") == 0)
258 : {
259 6 : if (IsSet(opts->specified_opts, SUBOPT_SYNCHRONOUS_COMMIT))
260 0 : errorConflictingDefElem(defel, pstate);
261 :
262 6 : opts->specified_opts |= SUBOPT_SYNCHRONOUS_COMMIT;
263 6 : opts->synchronous_commit = defGetString(defel);
264 :
265 : /* Test if the given value is valid for synchronous_commit GUC. */
266 6 : (void) set_config_option("synchronous_commit", opts->synchronous_commit,
267 : PGC_BACKEND, PGC_S_TEST, GUC_ACTION_SET,
268 : false, 0, false);
269 : }
270 221 : else if (IsSet(supported_opts, SUBOPT_REFRESH) &&
271 33 : strcmp(defel->defname, "refresh") == 0)
272 : {
273 33 : if (IsSet(opts->specified_opts, SUBOPT_REFRESH))
274 0 : errorConflictingDefElem(defel, pstate);
275 :
276 33 : opts->specified_opts |= SUBOPT_REFRESH;
277 33 : opts->refresh = defGetBoolean(defel);
278 : }
279 188 : else if (IsSet(supported_opts, SUBOPT_BINARY) &&
280 176 : strcmp(defel->defname, "binary") == 0)
281 : {
282 16 : if (IsSet(opts->specified_opts, SUBOPT_BINARY))
283 0 : errorConflictingDefElem(defel, pstate);
284 :
285 16 : opts->specified_opts |= SUBOPT_BINARY;
286 16 : opts->binary = defGetBoolean(defel);
287 : }
288 172 : else if (IsSet(supported_opts, SUBOPT_STREAMING) &&
289 160 : strcmp(defel->defname, "streaming") == 0)
290 : {
291 37 : if (IsSet(opts->specified_opts, SUBOPT_STREAMING))
292 0 : errorConflictingDefElem(defel, pstate);
293 :
294 37 : opts->specified_opts |= SUBOPT_STREAMING;
295 37 : opts->streaming = defGetStreamingMode(defel);
296 : }
297 135 : else if (IsSet(supported_opts, SUBOPT_TWOPHASE_COMMIT) &&
298 123 : strcmp(defel->defname, "two_phase") == 0)
299 : {
300 21 : if (IsSet(opts->specified_opts, SUBOPT_TWOPHASE_COMMIT))
301 0 : errorConflictingDefElem(defel, pstate);
302 :
303 21 : opts->specified_opts |= SUBOPT_TWOPHASE_COMMIT;
304 21 : opts->twophase = defGetBoolean(defel);
305 : }
306 114 : else if (IsSet(supported_opts, SUBOPT_DISABLE_ON_ERR) &&
307 102 : strcmp(defel->defname, "disable_on_error") == 0)
308 : {
309 10 : if (IsSet(opts->specified_opts, SUBOPT_DISABLE_ON_ERR))
310 0 : errorConflictingDefElem(defel, pstate);
311 :
312 10 : opts->specified_opts |= SUBOPT_DISABLE_ON_ERR;
313 10 : opts->disableonerr = defGetBoolean(defel);
314 : }
315 104 : else if (IsSet(supported_opts, SUBOPT_PASSWORD_REQUIRED) &&
316 92 : strcmp(defel->defname, "password_required") == 0)
317 : {
318 13 : if (IsSet(opts->specified_opts, SUBOPT_PASSWORD_REQUIRED))
319 0 : errorConflictingDefElem(defel, pstate);
320 :
321 13 : opts->specified_opts |= SUBOPT_PASSWORD_REQUIRED;
322 13 : opts->passwordrequired = defGetBoolean(defel);
323 : }
324 91 : else if (IsSet(supported_opts, SUBOPT_RUN_AS_OWNER) &&
325 79 : strcmp(defel->defname, "run_as_owner") == 0)
326 : {
327 9 : if (IsSet(opts->specified_opts, SUBOPT_RUN_AS_OWNER))
328 0 : errorConflictingDefElem(defel, pstate);
329 :
330 9 : opts->specified_opts |= SUBOPT_RUN_AS_OWNER;
331 9 : opts->runasowner = defGetBoolean(defel);
332 : }
333 82 : else if (IsSet(supported_opts, SUBOPT_FAILOVER) &&
334 70 : strcmp(defel->defname, "failover") == 0)
335 : {
336 14 : if (IsSet(opts->specified_opts, SUBOPT_FAILOVER))
337 0 : errorConflictingDefElem(defel, pstate);
338 :
339 14 : opts->specified_opts |= SUBOPT_FAILOVER;
340 14 : opts->failover = defGetBoolean(defel);
341 : }
342 68 : else if (IsSet(supported_opts, SUBOPT_RETAIN_DEAD_TUPLES) &&
343 56 : strcmp(defel->defname, "retain_dead_tuples") == 0)
344 : {
345 12 : if (IsSet(opts->specified_opts, SUBOPT_RETAIN_DEAD_TUPLES))
346 0 : errorConflictingDefElem(defel, pstate);
347 :
348 12 : opts->specified_opts |= SUBOPT_RETAIN_DEAD_TUPLES;
349 12 : opts->retaindeadtuples = defGetBoolean(defel);
350 : }
351 56 : else if (IsSet(supported_opts, SUBOPT_MAX_RETENTION_DURATION) &&
352 44 : strcmp(defel->defname, "max_retention_duration") == 0)
353 : {
354 11 : if (IsSet(opts->specified_opts, SUBOPT_MAX_RETENTION_DURATION))
355 0 : errorConflictingDefElem(defel, pstate);
356 :
357 11 : opts->specified_opts |= SUBOPT_MAX_RETENTION_DURATION;
358 11 : opts->maxretention = defGetInt32(defel);
359 : }
360 45 : else if (IsSet(supported_opts, SUBOPT_ORIGIN) &&
361 33 : strcmp(defel->defname, "origin") == 0)
362 : {
363 21 : if (IsSet(opts->specified_opts, SUBOPT_ORIGIN))
364 0 : errorConflictingDefElem(defel, pstate);
365 :
366 21 : opts->specified_opts |= SUBOPT_ORIGIN;
367 21 : pfree(opts->origin);
368 :
369 : /*
370 : * Even though the "origin" parameter allows only "none" and "any"
371 : * values, it is implemented as a string type so that the
372 : * parameter can be extended in future versions to support
373 : * filtering using origin names specified by the user.
374 : */
375 21 : opts->origin = defGetString(defel);
376 :
377 29 : if ((pg_strcasecmp(opts->origin, LOGICALREP_ORIGIN_NONE) != 0) &&
378 8 : (pg_strcasecmp(opts->origin, LOGICALREP_ORIGIN_ANY) != 0))
379 3 : ereport(ERROR,
380 : errcode(ERRCODE_INVALID_PARAMETER_VALUE),
381 : errmsg("unrecognized origin value: \"%s\"", opts->origin));
382 : }
383 24 : else if (IsSet(supported_opts, SUBOPT_LSN) &&
384 12 : strcmp(defel->defname, "lsn") == 0)
385 9 : {
386 12 : char *lsn_str = defGetString(defel);
387 : XLogRecPtr lsn;
388 :
389 12 : if (IsSet(opts->specified_opts, SUBOPT_LSN))
390 0 : errorConflictingDefElem(defel, pstate);
391 :
392 : /* Setting lsn = NONE is treated as resetting LSN */
393 12 : if (strcmp(lsn_str, "none") == 0)
394 3 : lsn = InvalidXLogRecPtr;
395 : else
396 : {
397 : /* Parse the argument as LSN */
398 9 : lsn = DatumGetLSN(DirectFunctionCall1(pg_lsn_in,
399 : CStringGetDatum(lsn_str)));
400 :
401 9 : if (!XLogRecPtrIsValid(lsn))
402 3 : ereport(ERROR,
403 : (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
404 : errmsg("invalid WAL location (LSN): %s", lsn_str)));
405 : }
406 :
407 9 : opts->specified_opts |= SUBOPT_LSN;
408 9 : opts->lsn = lsn;
409 : }
410 12 : else if (IsSet(supported_opts, SUBOPT_WAL_RECEIVER_TIMEOUT) &&
411 12 : strcmp(defel->defname, "wal_receiver_timeout") == 0)
412 6 : {
413 : bool parsed;
414 : int val;
415 :
416 9 : if (IsSet(opts->specified_opts, SUBOPT_WAL_RECEIVER_TIMEOUT))
417 0 : errorConflictingDefElem(defel, pstate);
418 :
419 9 : opts->specified_opts |= SUBOPT_WAL_RECEIVER_TIMEOUT;
420 9 : opts->wal_receiver_timeout = defGetString(defel);
421 :
422 : /*
423 : * Test if the given value is valid for wal_receiver_timeout GUC.
424 : * Skip this test if the value is -1, since -1 is allowed for the
425 : * wal_receiver_timeout subscription option, but not for the GUC
426 : * itself.
427 : */
428 9 : parsed = parse_int(opts->wal_receiver_timeout, &val, 0, NULL);
429 9 : if (!parsed || val != -1)
430 6 : (void) set_config_option("wal_receiver_timeout", opts->wal_receiver_timeout,
431 : PGC_BACKEND, PGC_S_TEST, GUC_ACTION_SET,
432 : false, 0, false);
433 : }
434 : else
435 3 : ereport(ERROR,
436 : (errcode(ERRCODE_SYNTAX_ERROR),
437 : errmsg("unrecognized subscription parameter: \"%s\"", defel->defname)));
438 : }
439 :
440 : /*
441 : * We've been explicitly asked to not connect, that requires some
442 : * additional processing.
443 : */
444 485 : if (!opts->connect && IsSet(supported_opts, SUBOPT_CONNECT))
445 : {
446 : /* Check for incompatible options from the user. */
447 87 : if (opts->enabled &&
448 87 : IsSet(opts->specified_opts, SUBOPT_ENABLED))
449 3 : ereport(ERROR,
450 : (errcode(ERRCODE_SYNTAX_ERROR),
451 : /*- translator: both %s are strings of the form "option = value" */
452 : errmsg("%s and %s are mutually exclusive options",
453 : "connect = false", "enabled = true")));
454 :
455 84 : if (opts->create_slot &&
456 81 : IsSet(opts->specified_opts, SUBOPT_CREATE_SLOT))
457 3 : ereport(ERROR,
458 : (errcode(ERRCODE_SYNTAX_ERROR),
459 : errmsg("%s and %s are mutually exclusive options",
460 : "connect = false", "create_slot = true")));
461 :
462 81 : if (opts->copy_data &&
463 78 : IsSet(opts->specified_opts, SUBOPT_COPY_DATA))
464 3 : ereport(ERROR,
465 : (errcode(ERRCODE_SYNTAX_ERROR),
466 : errmsg("%s and %s are mutually exclusive options",
467 : "connect = false", "copy_data = true")));
468 :
469 : /* Change the defaults of other options. */
470 78 : opts->enabled = false;
471 78 : opts->create_slot = false;
472 78 : opts->copy_data = false;
473 : }
474 :
475 : /*
476 : * Do additional checking for disallowed combination when slot_name = NONE
477 : * was used.
478 : */
479 476 : if (!opts->slot_name &&
480 458 : IsSet(opts->specified_opts, SUBOPT_SLOT_NAME))
481 : {
482 71 : if (opts->enabled)
483 : {
484 9 : if (IsSet(opts->specified_opts, SUBOPT_ENABLED))
485 3 : ereport(ERROR,
486 : (errcode(ERRCODE_SYNTAX_ERROR),
487 : /*- translator: both %s are strings of the form "option = value" */
488 : errmsg("%s and %s are mutually exclusive options",
489 : "slot_name = NONE", "enabled = true")));
490 : else
491 6 : ereport(ERROR,
492 : (errcode(ERRCODE_SYNTAX_ERROR),
493 : /*- translator: both %s are strings of the form "option = value" */
494 : errmsg("subscription with %s must also set %s",
495 : "slot_name = NONE", "enabled = false")));
496 : }
497 :
498 62 : if (opts->create_slot)
499 : {
500 6 : if (IsSet(opts->specified_opts, SUBOPT_CREATE_SLOT))
501 3 : ereport(ERROR,
502 : (errcode(ERRCODE_SYNTAX_ERROR),
503 : /*- translator: both %s are strings of the form "option = value" */
504 : errmsg("%s and %s are mutually exclusive options",
505 : "slot_name = NONE", "create_slot = true")));
506 : else
507 3 : ereport(ERROR,
508 : (errcode(ERRCODE_SYNTAX_ERROR),
509 : /*- translator: both %s are strings of the form "option = value" */
510 : errmsg("subscription with %s must also set %s",
511 : "slot_name = NONE", "create_slot = false")));
512 : }
513 : }
514 461 : }
515 :
516 : /*
517 : * Check that the specified publications are present on the publisher.
518 : */
519 : static void
520 134 : check_publications(WalReceiverConn *wrconn, List *publications)
521 : {
522 : WalRcvExecResult *res;
523 : StringInfoData cmd;
524 : TupleTableSlot *slot;
525 134 : List *publicationsCopy = NIL;
526 134 : Oid tableRow[1] = {TEXTOID};
527 :
528 134 : initStringInfo(&cmd);
529 134 : appendStringInfoString(&cmd, "SELECT t.pubname FROM\n"
530 : " pg_catalog.pg_publication t WHERE\n"
531 : " t.pubname IN (");
532 134 : GetPublicationsStr(publications, &cmd, true);
533 134 : appendStringInfoChar(&cmd, ')');
534 :
535 134 : res = walrcv_exec(wrconn, cmd.data, 1, tableRow);
536 134 : pfree(cmd.data);
537 :
538 134 : if (res->status != WALRCV_OK_TUPLES)
539 0 : ereport(ERROR,
540 : errmsg("could not receive list of publications from the publisher: %s",
541 : res->err));
542 :
543 134 : publicationsCopy = list_copy(publications);
544 :
545 : /* Process publication(s). */
546 134 : slot = MakeSingleTupleTableSlot(res->tupledesc, &TTSOpsMinimalTuple);
547 297 : while (tuplestore_gettupleslot(res->tuplestore, true, false, slot))
548 : {
549 : char *pubname;
550 : bool isnull;
551 :
552 163 : pubname = TextDatumGetCString(slot_getattr(slot, 1, &isnull));
553 : Assert(!isnull);
554 :
555 : /* Delete the publication present in publisher from the list. */
556 163 : publicationsCopy = list_delete(publicationsCopy, makeString(pubname));
557 163 : ExecClearTuple(slot);
558 : }
559 :
560 134 : ExecDropSingleTupleTableSlot(slot);
561 :
562 134 : walrcv_clear_result(res);
563 :
564 134 : if (list_length(publicationsCopy))
565 : {
566 : /* Prepare the list of non-existent publication(s) for error message. */
567 : StringInfoData pubnames;
568 :
569 4 : initStringInfo(&pubnames);
570 :
571 4 : GetPublicationsStr(publicationsCopy, &pubnames, false);
572 4 : ereport(WARNING,
573 : errcode(ERRCODE_UNDEFINED_OBJECT),
574 : errmsg_plural("publication %s does not exist on the publisher",
575 : "publications %s do not exist on the publisher",
576 : list_length(publicationsCopy),
577 : pubnames.data));
578 : }
579 134 : }
580 :
581 : /*
582 : * Auxiliary function to build a text array out of a list of String nodes.
583 : */
584 : static Datum
585 207 : publicationListToArray(List *publist)
586 : {
587 : ArrayType *arr;
588 : Datum *datums;
589 : MemoryContext memcxt;
590 : MemoryContext oldcxt;
591 :
592 : /* Create memory context for temporary allocations. */
593 207 : memcxt = AllocSetContextCreate(CurrentMemoryContext,
594 : "publicationListToArray to array",
595 : ALLOCSET_DEFAULT_SIZES);
596 207 : oldcxt = MemoryContextSwitchTo(memcxt);
597 :
598 207 : datums = palloc_array(Datum, list_length(publist));
599 :
600 207 : check_duplicates_in_publist(publist, datums);
601 :
602 204 : MemoryContextSwitchTo(oldcxt);
603 :
604 204 : arr = construct_array_builtin(datums, list_length(publist), TEXTOID);
605 :
606 204 : MemoryContextDelete(memcxt);
607 :
608 204 : return PointerGetDatum(arr);
609 : }
610 :
611 : /*
612 : * Create new subscription.
613 : */
614 : ObjectAddress
615 261 : CreateSubscription(ParseState *pstate, CreateSubscriptionStmt *stmt,
616 : bool isTopLevel)
617 : {
618 : Relation rel;
619 : ObjectAddress myself;
620 : Oid subid;
621 : bool nulls[Natts_pg_subscription];
622 : Datum values[Natts_pg_subscription];
623 261 : Oid owner = GetUserId();
624 : HeapTuple tup;
625 : Oid serverid;
626 : char *conninfo;
627 : char originname[NAMEDATALEN];
628 : List *publications;
629 : bits32 supported_opts;
630 261 : SubOpts opts = {0};
631 : AclResult aclresult;
632 :
633 : /*
634 : * Parse and check options.
635 : *
636 : * Connection and publication should not be specified here.
637 : */
638 261 : supported_opts = (SUBOPT_CONNECT | SUBOPT_ENABLED | SUBOPT_CREATE_SLOT |
639 : SUBOPT_SLOT_NAME | SUBOPT_COPY_DATA |
640 : SUBOPT_SYNCHRONOUS_COMMIT | SUBOPT_BINARY |
641 : SUBOPT_STREAMING | SUBOPT_TWOPHASE_COMMIT |
642 : SUBOPT_DISABLE_ON_ERR | SUBOPT_PASSWORD_REQUIRED |
643 : SUBOPT_RUN_AS_OWNER | SUBOPT_FAILOVER |
644 : SUBOPT_RETAIN_DEAD_TUPLES |
645 : SUBOPT_MAX_RETENTION_DURATION |
646 : SUBOPT_WAL_RECEIVER_TIMEOUT | SUBOPT_ORIGIN);
647 261 : parse_subscription_options(pstate, stmt->options, supported_opts, &opts);
648 :
649 : /*
650 : * Since creating a replication slot is not transactional, rolling back
651 : * the transaction leaves the created replication slot. So we cannot run
652 : * CREATE SUBSCRIPTION inside a transaction block if creating a
653 : * replication slot.
654 : */
655 216 : if (opts.create_slot)
656 133 : PreventInTransactionBlock(isTopLevel, "CREATE SUBSCRIPTION ... WITH (create_slot = true)");
657 :
658 : /*
659 : * We don't want to allow unprivileged users to be able to trigger
660 : * attempts to access arbitrary network destinations, so require the user
661 : * to have been specifically authorized to create subscriptions.
662 : */
663 213 : if (!has_privs_of_role(owner, ROLE_PG_CREATE_SUBSCRIPTION))
664 3 : ereport(ERROR,
665 : (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
666 : errmsg("permission denied to create subscription"),
667 : errdetail("Only roles with privileges of the \"%s\" role may create subscriptions.",
668 : "pg_create_subscription")));
669 :
670 : /*
671 : * Since a subscription is a database object, we also check for CREATE
672 : * permission on the database.
673 : */
674 210 : aclresult = object_aclcheck(DatabaseRelationId, MyDatabaseId,
675 : owner, ACL_CREATE);
676 210 : if (aclresult != ACLCHECK_OK)
677 6 : aclcheck_error(aclresult, OBJECT_DATABASE,
678 3 : get_database_name(MyDatabaseId));
679 :
680 : /*
681 : * Non-superusers are required to set a password for authentication, and
682 : * that password must be used by the target server, but the superuser can
683 : * exempt a subscription from this requirement.
684 : */
685 207 : if (!opts.passwordrequired && !superuser_arg(owner))
686 3 : ereport(ERROR,
687 : (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
688 : errmsg("password_required=false is superuser-only"),
689 : errhint("Subscriptions with the password_required option set to false may only be created or modified by the superuser.")));
690 :
691 : /*
692 : * If built with appropriate switch, whine when regression-testing
693 : * conventions for subscription names are violated.
694 : */
695 : #ifdef ENFORCE_REGRESSION_TEST_NAME_RESTRICTIONS
696 : if (strncmp(stmt->subname, "regress_", 8) != 0)
697 : elog(WARNING, "subscriptions created by regression test cases should have names starting with \"regress_\"");
698 : #endif
699 :
700 204 : rel = table_open(SubscriptionRelationId, RowExclusiveLock);
701 :
702 : /* Check if name is used */
703 204 : subid = GetSysCacheOid2(SUBSCRIPTIONNAME, Anum_pg_subscription_oid,
704 : ObjectIdGetDatum(MyDatabaseId), CStringGetDatum(stmt->subname));
705 204 : if (OidIsValid(subid))
706 : {
707 4 : ereport(ERROR,
708 : (errcode(ERRCODE_DUPLICATE_OBJECT),
709 : errmsg("subscription \"%s\" already exists",
710 : stmt->subname)));
711 : }
712 :
713 : /*
714 : * Ensure that system configuration parameters are set appropriately to
715 : * support retain_dead_tuples and max_retention_duration.
716 : */
717 200 : CheckSubDeadTupleRetention(true, !opts.enabled, WARNING,
718 200 : opts.retaindeadtuples, opts.retaindeadtuples,
719 200 : (opts.maxretention > 0));
720 :
721 200 : if (!IsSet(opts.specified_opts, SUBOPT_SLOT_NAME) &&
722 165 : opts.slot_name == NULL)
723 165 : opts.slot_name = stmt->subname;
724 :
725 : /* The default for synchronous_commit of subscriptions is off. */
726 200 : if (opts.synchronous_commit == NULL)
727 200 : opts.synchronous_commit = "off";
728 :
729 : /*
730 : * The default for wal_receiver_timeout of subscriptions is -1, which
731 : * means the value is inherited from the server configuration, command
732 : * line, or role/database settings.
733 : */
734 200 : if (opts.wal_receiver_timeout == NULL)
735 200 : opts.wal_receiver_timeout = "-1";
736 :
737 : /* Load the library providing us libpq calls. */
738 200 : load_file("libpqwalreceiver", false);
739 :
740 200 : if (stmt->servername)
741 : {
742 : ForeignServer *server;
743 :
744 : Assert(!stmt->conninfo);
745 14 : conninfo = NULL;
746 :
747 14 : server = GetForeignServerByName(stmt->servername, false);
748 14 : aclresult = object_aclcheck(ForeignServerRelationId, server->serverid, owner, ACL_USAGE);
749 14 : if (aclresult != ACLCHECK_OK)
750 3 : aclcheck_error(aclresult, OBJECT_FOREIGN_SERVER, server->servername);
751 :
752 : /* make sure a user mapping exists */
753 11 : GetUserMapping(owner, server->serverid);
754 :
755 8 : serverid = server->serverid;
756 8 : conninfo = ForeignServerConnectionString(owner, serverid);
757 : }
758 : else
759 : {
760 : Assert(stmt->conninfo);
761 :
762 186 : serverid = InvalidOid;
763 186 : conninfo = stmt->conninfo;
764 : }
765 :
766 : /* Check the connection info string. */
767 191 : walrcv_check_conninfo(conninfo, opts.passwordrequired && !superuser());
768 :
769 182 : publications = stmt->publication;
770 :
771 : /* Everything ok, form a new tuple. */
772 182 : memset(values, 0, sizeof(values));
773 182 : memset(nulls, false, sizeof(nulls));
774 :
775 182 : subid = GetNewOidWithIndex(rel, SubscriptionObjectIndexId,
776 : Anum_pg_subscription_oid);
777 182 : values[Anum_pg_subscription_oid - 1] = ObjectIdGetDatum(subid);
778 182 : values[Anum_pg_subscription_subdbid - 1] = ObjectIdGetDatum(MyDatabaseId);
779 182 : values[Anum_pg_subscription_subskiplsn - 1] = LSNGetDatum(InvalidXLogRecPtr);
780 182 : values[Anum_pg_subscription_subname - 1] =
781 182 : DirectFunctionCall1(namein, CStringGetDatum(stmt->subname));
782 182 : values[Anum_pg_subscription_subowner - 1] = ObjectIdGetDatum(owner);
783 182 : values[Anum_pg_subscription_subenabled - 1] = BoolGetDatum(opts.enabled);
784 182 : values[Anum_pg_subscription_subbinary - 1] = BoolGetDatum(opts.binary);
785 182 : values[Anum_pg_subscription_substream - 1] = CharGetDatum(opts.streaming);
786 182 : values[Anum_pg_subscription_subtwophasestate - 1] =
787 182 : CharGetDatum(opts.twophase ?
788 : LOGICALREP_TWOPHASE_STATE_PENDING :
789 : LOGICALREP_TWOPHASE_STATE_DISABLED);
790 182 : values[Anum_pg_subscription_subdisableonerr - 1] = BoolGetDatum(opts.disableonerr);
791 182 : values[Anum_pg_subscription_subpasswordrequired - 1] = BoolGetDatum(opts.passwordrequired);
792 182 : values[Anum_pg_subscription_subrunasowner - 1] = BoolGetDatum(opts.runasowner);
793 182 : values[Anum_pg_subscription_subfailover - 1] = BoolGetDatum(opts.failover);
794 182 : values[Anum_pg_subscription_subretaindeadtuples - 1] =
795 182 : BoolGetDatum(opts.retaindeadtuples);
796 182 : values[Anum_pg_subscription_submaxretention - 1] =
797 182 : Int32GetDatum(opts.maxretention);
798 182 : values[Anum_pg_subscription_subretentionactive - 1] =
799 182 : Int32GetDatum(opts.retaindeadtuples);
800 182 : values[Anum_pg_subscription_subserver - 1] = serverid;
801 182 : if (!OidIsValid(serverid))
802 177 : values[Anum_pg_subscription_subconninfo - 1] =
803 177 : CStringGetTextDatum(conninfo);
804 : else
805 5 : nulls[Anum_pg_subscription_subconninfo - 1] = true;
806 182 : if (opts.slot_name)
807 171 : values[Anum_pg_subscription_subslotname - 1] =
808 171 : DirectFunctionCall1(namein, CStringGetDatum(opts.slot_name));
809 : else
810 11 : nulls[Anum_pg_subscription_subslotname - 1] = true;
811 182 : values[Anum_pg_subscription_subsynccommit - 1] =
812 182 : CStringGetTextDatum(opts.synchronous_commit);
813 182 : values[Anum_pg_subscription_subwalrcvtimeout - 1] =
814 182 : CStringGetTextDatum(opts.wal_receiver_timeout);
815 179 : values[Anum_pg_subscription_subpublications - 1] =
816 182 : publicationListToArray(publications);
817 179 : values[Anum_pg_subscription_suborigin - 1] =
818 179 : CStringGetTextDatum(opts.origin);
819 :
820 179 : tup = heap_form_tuple(RelationGetDescr(rel), values, nulls);
821 :
822 : /* Insert tuple into catalog. */
823 179 : CatalogTupleInsert(rel, tup);
824 179 : heap_freetuple(tup);
825 :
826 179 : recordDependencyOnOwner(SubscriptionRelationId, subid, owner);
827 :
828 179 : ObjectAddressSet(myself, SubscriptionRelationId, subid);
829 :
830 179 : if (stmt->servername)
831 : {
832 : ObjectAddress referenced;
833 :
834 : Assert(OidIsValid(serverid));
835 :
836 5 : ObjectAddressSet(referenced, ForeignServerRelationId, serverid);
837 5 : recordDependencyOn(&myself, &referenced, DEPENDENCY_NORMAL);
838 : }
839 :
840 : /*
841 : * A replication origin is currently created for all subscriptions,
842 : * including those that only contain sequences or are otherwise empty.
843 : *
844 : * XXX: While this is technically unnecessary, optimizing it would require
845 : * additional logic to skip origin creation during DDL operations and
846 : * apply workers initialization, and to handle origin creation dynamically
847 : * when tables are added to the subscription. It is not clear whether
848 : * preventing creation of origins is worth additional complexity.
849 : */
850 179 : ReplicationOriginNameForLogicalRep(subid, InvalidOid, originname, sizeof(originname));
851 179 : replorigin_create(originname);
852 :
853 : /*
854 : * Connect to remote side to execute requested commands and fetch table
855 : * and sequence info.
856 : */
857 179 : if (opts.connect)
858 : {
859 : char *err;
860 : WalReceiverConn *wrconn;
861 : bool must_use_password;
862 :
863 : /* Try to connect to the publisher. */
864 128 : must_use_password = !superuser_arg(owner) && opts.passwordrequired;
865 128 : wrconn = walrcv_connect(conninfo, true, true, must_use_password,
866 : stmt->subname, &err);
867 128 : if (!wrconn)
868 3 : ereport(ERROR,
869 : (errcode(ERRCODE_CONNECTION_FAILURE),
870 : errmsg("subscription \"%s\" could not connect to the publisher: %s",
871 : stmt->subname, err)));
872 :
873 125 : PG_TRY();
874 : {
875 125 : bool has_tables = false;
876 : List *pubrels;
877 : char relation_state;
878 :
879 125 : check_publications(wrconn, publications);
880 125 : check_publications_origin_tables(wrconn, publications,
881 125 : opts.copy_data,
882 125 : opts.retaindeadtuples, opts.origin,
883 : NULL, 0, stmt->subname);
884 125 : check_publications_origin_sequences(wrconn, publications,
885 125 : opts.copy_data, opts.origin,
886 : NULL, 0, stmt->subname);
887 :
888 125 : if (opts.retaindeadtuples)
889 3 : check_pub_dead_tuple_retention(wrconn);
890 :
891 : /*
892 : * Set sync state based on if we were asked to do data copy or
893 : * not.
894 : */
895 125 : relation_state = opts.copy_data ? SUBREL_STATE_INIT : SUBREL_STATE_READY;
896 :
897 : /*
898 : * Build local relation status info. Relations are for both tables
899 : * and sequences from the publisher.
900 : */
901 125 : pubrels = fetch_relation_list(wrconn, publications);
902 :
903 442 : foreach_ptr(PublicationRelKind, pubrelinfo, pubrels)
904 : {
905 : Oid relid;
906 : char relkind;
907 194 : RangeVar *rv = pubrelinfo->rv;
908 :
909 194 : relid = RangeVarGetRelid(rv, AccessShareLock, false);
910 194 : relkind = get_rel_relkind(relid);
911 :
912 : /* Check for supported relkind. */
913 194 : CheckSubscriptionRelkind(relkind, pubrelinfo->relkind,
914 194 : rv->schemaname, rv->relname);
915 194 : has_tables |= (relkind != RELKIND_SEQUENCE);
916 194 : AddSubscriptionRelState(subid, relid, relation_state,
917 : InvalidXLogRecPtr, true);
918 : }
919 :
920 : /*
921 : * If requested, create permanent slot for the subscription. We
922 : * won't use the initial snapshot for anything, so no need to
923 : * export it.
924 : *
925 : * XXX: Similar to origins, it is not clear whether preventing the
926 : * slot creation for empty and sequence-only subscriptions is
927 : * worth additional complexity.
928 : */
929 124 : if (opts.create_slot)
930 : {
931 119 : bool twophase_enabled = false;
932 :
933 : Assert(opts.slot_name);
934 :
935 : /*
936 : * Even if two_phase is set, don't create the slot with
937 : * two-phase enabled. Will enable it once all the tables are
938 : * synced and ready. This avoids race-conditions like prepared
939 : * transactions being skipped due to changes not being applied
940 : * due to checks in should_apply_changes_for_rel() when
941 : * tablesync for the corresponding tables are in progress. See
942 : * comments atop worker.c.
943 : *
944 : * Note that if tables were specified but copy_data is false
945 : * then it is safe to enable two_phase up-front because those
946 : * tables are already initially in READY state. When the
947 : * subscription has no tables, we leave the twophase state as
948 : * PENDING, to allow ALTER SUBSCRIPTION ... REFRESH
949 : * PUBLICATION to work.
950 : */
951 119 : if (opts.twophase && !opts.copy_data && has_tables)
952 1 : twophase_enabled = true;
953 :
954 119 : walrcv_create_slot(wrconn, opts.slot_name, false, twophase_enabled,
955 : opts.failover, CRS_NOEXPORT_SNAPSHOT, NULL);
956 :
957 119 : if (twophase_enabled)
958 1 : UpdateTwoPhaseState(subid, LOGICALREP_TWOPHASE_STATE_ENABLED);
959 :
960 119 : ereport(NOTICE,
961 : (errmsg("created replication slot \"%s\" on publisher",
962 : opts.slot_name)));
963 : }
964 : }
965 1 : PG_FINALLY();
966 : {
967 125 : walrcv_disconnect(wrconn);
968 : }
969 125 : PG_END_TRY();
970 : }
971 : else
972 51 : ereport(WARNING,
973 : (errmsg("subscription was created, but is not connected"),
974 : errhint("To initiate replication, you must manually create the replication slot, enable the subscription, and alter the subscription to refresh publications.")));
975 :
976 175 : table_close(rel, RowExclusiveLock);
977 :
978 175 : pgstat_create_subscription(subid);
979 :
980 : /*
981 : * Notify the launcher to start the apply worker if the subscription is
982 : * enabled, or to create the conflict detection slot if retain_dead_tuples
983 : * is enabled.
984 : *
985 : * Creating the conflict detection slot is essential even when the
986 : * subscription is not enabled. This ensures that dead tuples are
987 : * retained, which is necessary for accurately identifying the type of
988 : * conflict during replication.
989 : */
990 175 : if (opts.enabled || opts.retaindeadtuples)
991 118 : ApplyLauncherWakeupAtCommit();
992 :
993 175 : InvokeObjectPostCreateHook(SubscriptionRelationId, subid, 0);
994 :
995 175 : return myself;
996 : }
997 :
998 : static void
999 38 : AlterSubscription_refresh(Subscription *sub, bool copy_data,
1000 : List *validate_publications)
1001 : {
1002 : char *err;
1003 38 : List *pubrels = NIL;
1004 : Oid *pubrel_local_oids;
1005 : List *subrel_states;
1006 38 : List *sub_remove_rels = NIL;
1007 : Oid *subrel_local_oids;
1008 : Oid *subseq_local_oids;
1009 : int subrel_count;
1010 : ListCell *lc;
1011 : int off;
1012 38 : int tbl_count = 0;
1013 38 : int seq_count = 0;
1014 38 : Relation rel = NULL;
1015 : typedef struct SubRemoveRels
1016 : {
1017 : Oid relid;
1018 : char state;
1019 : } SubRemoveRels;
1020 :
1021 : WalReceiverConn *wrconn;
1022 : bool must_use_password;
1023 :
1024 : /* Load the library providing us libpq calls. */
1025 38 : load_file("libpqwalreceiver", false);
1026 :
1027 : /* Try to connect to the publisher. */
1028 38 : must_use_password = sub->passwordrequired && !sub->ownersuperuser;
1029 38 : wrconn = walrcv_connect(sub->conninfo, true, true, must_use_password,
1030 : sub->name, &err);
1031 37 : if (!wrconn)
1032 0 : ereport(ERROR,
1033 : (errcode(ERRCODE_CONNECTION_FAILURE),
1034 : errmsg("subscription \"%s\" could not connect to the publisher: %s",
1035 : sub->name, err)));
1036 :
1037 37 : PG_TRY();
1038 : {
1039 37 : if (validate_publications)
1040 9 : check_publications(wrconn, validate_publications);
1041 :
1042 : /* Get the relation list from publisher. */
1043 37 : pubrels = fetch_relation_list(wrconn, sub->publications);
1044 :
1045 : /* Get local relation list. */
1046 37 : subrel_states = GetSubscriptionRelations(sub->oid, true, true, false);
1047 37 : subrel_count = list_length(subrel_states);
1048 :
1049 : /*
1050 : * Build qsorted arrays of local table oids and sequence oids for
1051 : * faster lookup. This can potentially contain all tables and
1052 : * sequences in the database so speed of lookup is important.
1053 : *
1054 : * We do not yet know the exact count of tables and sequences, so we
1055 : * allocate separate arrays for table OIDs and sequence OIDs based on
1056 : * the total number of relations (subrel_count).
1057 : */
1058 37 : subrel_local_oids = palloc(subrel_count * sizeof(Oid));
1059 37 : subseq_local_oids = palloc(subrel_count * sizeof(Oid));
1060 134 : foreach(lc, subrel_states)
1061 : {
1062 97 : SubscriptionRelState *relstate = (SubscriptionRelState *) lfirst(lc);
1063 :
1064 97 : if (get_rel_relkind(relstate->relid) == RELKIND_SEQUENCE)
1065 9 : subseq_local_oids[seq_count++] = relstate->relid;
1066 : else
1067 88 : subrel_local_oids[tbl_count++] = relstate->relid;
1068 : }
1069 :
1070 37 : qsort(subrel_local_oids, tbl_count, sizeof(Oid), oid_cmp);
1071 37 : check_publications_origin_tables(wrconn, sub->publications, copy_data,
1072 37 : sub->retaindeadtuples, sub->origin,
1073 : subrel_local_oids, tbl_count,
1074 : sub->name);
1075 :
1076 37 : qsort(subseq_local_oids, seq_count, sizeof(Oid), oid_cmp);
1077 37 : check_publications_origin_sequences(wrconn, sub->publications,
1078 : copy_data, sub->origin,
1079 : subseq_local_oids, seq_count,
1080 : sub->name);
1081 :
1082 : /*
1083 : * Walk over the remote relations and try to match them to locally
1084 : * known relations. If the relation is not known locally create a new
1085 : * state for it.
1086 : *
1087 : * Also builds array of local oids of remote relations for the next
1088 : * step.
1089 : */
1090 37 : off = 0;
1091 37 : pubrel_local_oids = palloc(list_length(pubrels) * sizeof(Oid));
1092 :
1093 176 : foreach_ptr(PublicationRelKind, pubrelinfo, pubrels)
1094 : {
1095 102 : RangeVar *rv = pubrelinfo->rv;
1096 : Oid relid;
1097 : char relkind;
1098 :
1099 102 : relid = RangeVarGetRelid(rv, AccessShareLock, false);
1100 102 : relkind = get_rel_relkind(relid);
1101 :
1102 : /* Check for supported relkind. */
1103 102 : CheckSubscriptionRelkind(relkind, pubrelinfo->relkind,
1104 102 : rv->schemaname, rv->relname);
1105 :
1106 102 : pubrel_local_oids[off++] = relid;
1107 :
1108 102 : if (!bsearch(&relid, subrel_local_oids,
1109 35 : tbl_count, sizeof(Oid), oid_cmp) &&
1110 35 : !bsearch(&relid, subseq_local_oids,
1111 : seq_count, sizeof(Oid), oid_cmp))
1112 : {
1113 26 : AddSubscriptionRelState(sub->oid, relid,
1114 : copy_data ? SUBREL_STATE_INIT : SUBREL_STATE_READY,
1115 : InvalidXLogRecPtr, true);
1116 26 : ereport(DEBUG1,
1117 : errmsg_internal("%s \"%s.%s\" added to subscription \"%s\"",
1118 : relkind == RELKIND_SEQUENCE ? "sequence" : "table",
1119 : rv->schemaname, rv->relname, sub->name));
1120 : }
1121 : }
1122 :
1123 : /*
1124 : * Next remove state for tables we should not care about anymore using
1125 : * the data we collected above
1126 : */
1127 37 : qsort(pubrel_local_oids, list_length(pubrels), sizeof(Oid), oid_cmp);
1128 :
1129 125 : for (off = 0; off < tbl_count; off++)
1130 : {
1131 88 : Oid relid = subrel_local_oids[off];
1132 :
1133 88 : if (!bsearch(&relid, pubrel_local_oids,
1134 88 : list_length(pubrels), sizeof(Oid), oid_cmp))
1135 : {
1136 : char state;
1137 : XLogRecPtr statelsn;
1138 21 : SubRemoveRels *remove_rel = palloc_object(SubRemoveRels);
1139 :
1140 : /*
1141 : * Lock pg_subscription_rel with AccessExclusiveLock to
1142 : * prevent any race conditions with the apply worker
1143 : * re-launching workers at the same time this code is trying
1144 : * to remove those tables.
1145 : *
1146 : * Even if new worker for this particular rel is restarted it
1147 : * won't be able to make any progress as we hold exclusive
1148 : * lock on pg_subscription_rel till the transaction end. It
1149 : * will simply exit as there is no corresponding rel entry.
1150 : *
1151 : * This locking also ensures that the state of rels won't
1152 : * change till we are done with this refresh operation.
1153 : */
1154 21 : if (!rel)
1155 9 : rel = table_open(SubscriptionRelRelationId, AccessExclusiveLock);
1156 :
1157 : /* Last known rel state. */
1158 21 : state = GetSubscriptionRelState(sub->oid, relid, &statelsn);
1159 :
1160 21 : RemoveSubscriptionRel(sub->oid, relid);
1161 :
1162 21 : remove_rel->relid = relid;
1163 21 : remove_rel->state = state;
1164 :
1165 21 : sub_remove_rels = lappend(sub_remove_rels, remove_rel);
1166 :
1167 21 : logicalrep_worker_stop(WORKERTYPE_TABLESYNC, sub->oid, relid);
1168 :
1169 : /*
1170 : * For READY state, we would have already dropped the
1171 : * tablesync origin.
1172 : */
1173 21 : if (state != SUBREL_STATE_READY)
1174 : {
1175 : char originname[NAMEDATALEN];
1176 :
1177 : /*
1178 : * Drop the tablesync's origin tracking if exists.
1179 : *
1180 : * It is possible that the origin is not yet created for
1181 : * tablesync worker, this can happen for the states before
1182 : * SUBREL_STATE_DATASYNC. The tablesync worker or apply
1183 : * worker can also concurrently try to drop the origin and
1184 : * by this time the origin might be already removed. For
1185 : * these reasons, passing missing_ok = true.
1186 : */
1187 0 : ReplicationOriginNameForLogicalRep(sub->oid, relid, originname,
1188 : sizeof(originname));
1189 0 : replorigin_drop_by_name(originname, true, false);
1190 : }
1191 :
1192 21 : ereport(DEBUG1,
1193 : (errmsg_internal("table \"%s.%s\" removed from subscription \"%s\"",
1194 : get_namespace_name(get_rel_namespace(relid)),
1195 : get_rel_name(relid),
1196 : sub->name)));
1197 : }
1198 : }
1199 :
1200 : /*
1201 : * Drop the tablesync slots associated with removed tables. This has
1202 : * to be at the end because otherwise if there is an error while doing
1203 : * the database operations we won't be able to rollback dropped slots.
1204 : */
1205 95 : foreach_ptr(SubRemoveRels, sub_remove_rel, sub_remove_rels)
1206 : {
1207 21 : if (sub_remove_rel->state != SUBREL_STATE_READY &&
1208 0 : sub_remove_rel->state != SUBREL_STATE_SYNCDONE)
1209 : {
1210 0 : char syncslotname[NAMEDATALEN] = {0};
1211 :
1212 : /*
1213 : * For READY/SYNCDONE states we know the tablesync slot has
1214 : * already been dropped by the tablesync worker.
1215 : *
1216 : * For other states, there is no certainty, maybe the slot
1217 : * does not exist yet. Also, if we fail after removing some of
1218 : * the slots, next time, it will again try to drop already
1219 : * dropped slots and fail. For these reasons, we allow
1220 : * missing_ok = true for the drop.
1221 : */
1222 0 : ReplicationSlotNameForTablesync(sub->oid, sub_remove_rel->relid,
1223 : syncslotname, sizeof(syncslotname));
1224 0 : ReplicationSlotDropAtPubNode(wrconn, syncslotname, true);
1225 : }
1226 : }
1227 :
1228 : /*
1229 : * Next remove state for sequences we should not care about anymore
1230 : * using the data we collected above
1231 : */
1232 46 : for (off = 0; off < seq_count; off++)
1233 : {
1234 9 : Oid relid = subseq_local_oids[off];
1235 :
1236 9 : if (!bsearch(&relid, pubrel_local_oids,
1237 9 : list_length(pubrels), sizeof(Oid), oid_cmp))
1238 : {
1239 : /*
1240 : * This locking ensures that the state of rels won't change
1241 : * till we are done with this refresh operation.
1242 : */
1243 0 : if (!rel)
1244 0 : rel = table_open(SubscriptionRelRelationId, AccessExclusiveLock);
1245 :
1246 0 : RemoveSubscriptionRel(sub->oid, relid);
1247 :
1248 0 : ereport(DEBUG1,
1249 : errmsg_internal("sequence \"%s.%s\" removed from subscription \"%s\"",
1250 : get_namespace_name(get_rel_namespace(relid)),
1251 : get_rel_name(relid),
1252 : sub->name));
1253 : }
1254 : }
1255 : }
1256 0 : PG_FINALLY();
1257 : {
1258 37 : walrcv_disconnect(wrconn);
1259 : }
1260 37 : PG_END_TRY();
1261 :
1262 37 : if (rel)
1263 9 : table_close(rel, NoLock);
1264 37 : }
1265 :
1266 : /*
1267 : * Marks all sequences with INIT state.
1268 : */
1269 : static void
1270 1 : AlterSubscription_refresh_seq(Subscription *sub)
1271 : {
1272 1 : char *err = NULL;
1273 : WalReceiverConn *wrconn;
1274 : bool must_use_password;
1275 :
1276 : /* Load the library providing us libpq calls. */
1277 1 : load_file("libpqwalreceiver", false);
1278 :
1279 : /* Try to connect to the publisher. */
1280 1 : must_use_password = sub->passwordrequired && !sub->ownersuperuser;
1281 1 : wrconn = walrcv_connect(sub->conninfo, true, true, must_use_password,
1282 : sub->name, &err);
1283 1 : if (!wrconn)
1284 0 : ereport(ERROR,
1285 : errcode(ERRCODE_CONNECTION_FAILURE),
1286 : errmsg("subscription \"%s\" could not connect to the publisher: %s",
1287 : sub->name, err));
1288 :
1289 1 : PG_TRY();
1290 : {
1291 : List *subrel_states;
1292 :
1293 1 : check_publications_origin_sequences(wrconn, sub->publications, true,
1294 : sub->origin, NULL, 0, sub->name);
1295 :
1296 : /* Get local sequence list. */
1297 1 : subrel_states = GetSubscriptionRelations(sub->oid, false, true, false);
1298 5 : foreach_ptr(SubscriptionRelState, subrel, subrel_states)
1299 : {
1300 3 : Oid relid = subrel->relid;
1301 :
1302 3 : UpdateSubscriptionRelState(sub->oid, relid, SUBREL_STATE_INIT,
1303 : InvalidXLogRecPtr, false);
1304 3 : ereport(DEBUG1,
1305 : errmsg_internal("sequence \"%s.%s\" of subscription \"%s\" set to INIT state",
1306 : get_namespace_name(get_rel_namespace(relid)),
1307 : get_rel_name(relid),
1308 : sub->name));
1309 : }
1310 : }
1311 0 : PG_FINALLY();
1312 : {
1313 1 : walrcv_disconnect(wrconn);
1314 : }
1315 1 : PG_END_TRY();
1316 1 : }
1317 :
1318 : /*
1319 : * Common checks for altering failover, two_phase, and retain_dead_tuples
1320 : * options.
1321 : */
1322 : static void
1323 13 : CheckAlterSubOption(Subscription *sub, const char *option,
1324 : bool slot_needs_update, bool isTopLevel)
1325 : {
1326 : Assert(strcmp(option, "failover") == 0 ||
1327 : strcmp(option, "two_phase") == 0 ||
1328 : strcmp(option, "retain_dead_tuples") == 0);
1329 :
1330 : /*
1331 : * Altering the retain_dead_tuples option does not update the slot on the
1332 : * publisher.
1333 : */
1334 : Assert(!slot_needs_update || strcmp(option, "retain_dead_tuples") != 0);
1335 :
1336 : /*
1337 : * Do not allow changing the option if the subscription is enabled. This
1338 : * is because both failover and two_phase options of the slot on the
1339 : * publisher cannot be modified if the slot is currently acquired by the
1340 : * existing walsender.
1341 : *
1342 : * Note that two_phase is enabled (aka changed from 'false' to 'true') on
1343 : * the publisher by the existing walsender, so we could have allowed that
1344 : * even when the subscription is enabled. But we kept this restriction for
1345 : * the sake of consistency and simplicity.
1346 : *
1347 : * Additionally, do not allow changing the retain_dead_tuples option when
1348 : * the subscription is enabled to prevent race conditions arising from the
1349 : * new option value being acknowledged asynchronously by the launcher and
1350 : * apply workers.
1351 : *
1352 : * Without the restriction, a race condition may arise when a user
1353 : * disables and immediately re-enables the retain_dead_tuples option. In
1354 : * this case, the launcher might drop the slot upon noticing the disabled
1355 : * action, while the apply worker may keep maintaining
1356 : * oldest_nonremovable_xid without noticing the option change. During this
1357 : * period, a transaction ID wraparound could falsely make this ID appear
1358 : * as if it originates from the future w.r.t the transaction ID stored in
1359 : * the slot maintained by launcher.
1360 : *
1361 : * Similarly, if the user enables retain_dead_tuples concurrently with the
1362 : * launcher starting the worker, the apply worker may start calculating
1363 : * oldest_nonremovable_xid before the launcher notices the enable action.
1364 : * Consequently, the launcher may update slot.xmin to a newer value than
1365 : * that maintained by the worker. In subsequent cycles, upon integrating
1366 : * the worker's oldest_nonremovable_xid, the launcher might detect a
1367 : * retreat in the calculated xmin, necessitating additional handling.
1368 : *
1369 : * XXX To address the above race conditions, we can define
1370 : * oldest_nonremovable_xid as FullTransactionId and adds the check to
1371 : * disallow retreating the conflict slot's xmin. For now, we kept the
1372 : * implementation simple by disallowing change to the retain_dead_tuples,
1373 : * but in the future we can change this after some more analysis.
1374 : *
1375 : * Note that we could restrict only the enabling of retain_dead_tuples to
1376 : * avoid the race conditions described above, but we maintain the
1377 : * restriction for both enable and disable operations for the sake of
1378 : * consistency.
1379 : */
1380 13 : if (sub->enabled)
1381 2 : ereport(ERROR,
1382 : (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
1383 : errmsg("cannot set option \"%s\" for enabled subscription",
1384 : option)));
1385 :
1386 11 : if (slot_needs_update)
1387 : {
1388 : StringInfoData cmd;
1389 :
1390 : /*
1391 : * A valid slot must be associated with the subscription for us to
1392 : * modify any of the slot's properties.
1393 : */
1394 8 : if (!sub->slotname)
1395 0 : ereport(ERROR,
1396 : (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
1397 : errmsg("cannot set option \"%s\" for a subscription that does not have a slot name",
1398 : option)));
1399 :
1400 : /* The changed option of the slot can't be rolled back. */
1401 8 : initStringInfo(&cmd);
1402 8 : appendStringInfo(&cmd, "ALTER SUBSCRIPTION ... SET (%s)", option);
1403 :
1404 8 : PreventInTransactionBlock(isTopLevel, cmd.data);
1405 5 : pfree(cmd.data);
1406 : }
1407 8 : }
1408 :
1409 : /*
1410 : * Alter the existing subscription.
1411 : */
1412 : ObjectAddress
1413 277 : AlterSubscription(ParseState *pstate, AlterSubscriptionStmt *stmt,
1414 : bool isTopLevel)
1415 : {
1416 : Relation rel;
1417 : ObjectAddress myself;
1418 : bool nulls[Natts_pg_subscription];
1419 : bool replaces[Natts_pg_subscription];
1420 : Datum values[Natts_pg_subscription];
1421 : HeapTuple tup;
1422 : Oid subid;
1423 277 : bool update_tuple = false;
1424 277 : bool update_failover = false;
1425 277 : bool update_two_phase = false;
1426 277 : bool check_pub_rdt = false;
1427 : bool retain_dead_tuples;
1428 : int max_retention;
1429 : bool retention_active;
1430 : char *origin;
1431 : Subscription *sub;
1432 : Form_pg_subscription form;
1433 : bits32 supported_opts;
1434 277 : SubOpts opts = {0};
1435 :
1436 277 : rel = table_open(SubscriptionRelationId, RowExclusiveLock);
1437 :
1438 : /* Fetch the existing tuple. */
1439 277 : tup = SearchSysCacheCopy2(SUBSCRIPTIONNAME, ObjectIdGetDatum(MyDatabaseId),
1440 : CStringGetDatum(stmt->subname));
1441 :
1442 277 : if (!HeapTupleIsValid(tup))
1443 3 : ereport(ERROR,
1444 : (errcode(ERRCODE_UNDEFINED_OBJECT),
1445 : errmsg("subscription \"%s\" does not exist",
1446 : stmt->subname)));
1447 :
1448 274 : form = (Form_pg_subscription) GETSTRUCT(tup);
1449 274 : subid = form->oid;
1450 :
1451 : /* must be owner */
1452 274 : if (!object_ownercheck(SubscriptionRelationId, subid, GetUserId()))
1453 0 : aclcheck_error(ACLCHECK_NOT_OWNER, OBJECT_SUBSCRIPTION,
1454 0 : stmt->subname);
1455 :
1456 : /*
1457 : * Skip ACL checks on the subscription's foreign server, if any. If
1458 : * changing the server (or replacing it with a raw connection), then the
1459 : * old one will be removed anyway. If changing something unrelated,
1460 : * there's no need to do an additional ACL check here; that will be done
1461 : * by the subscription worker anyway.
1462 : */
1463 274 : sub = GetSubscription(subid, false, false);
1464 :
1465 274 : retain_dead_tuples = sub->retaindeadtuples;
1466 274 : origin = sub->origin;
1467 274 : max_retention = sub->maxretention;
1468 274 : retention_active = sub->retentionactive;
1469 :
1470 : /*
1471 : * Don't allow non-superuser modification of a subscription with
1472 : * password_required=false.
1473 : */
1474 274 : if (!sub->passwordrequired && !superuser())
1475 0 : ereport(ERROR,
1476 : (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
1477 : errmsg("password_required=false is superuser-only"),
1478 : errhint("Subscriptions with the password_required option set to false may only be created or modified by the superuser.")));
1479 :
1480 : /* Lock the subscription so nobody else can do anything with it. */
1481 274 : LockSharedObject(SubscriptionRelationId, subid, 0, AccessExclusiveLock);
1482 :
1483 : /* Form a new tuple. */
1484 274 : memset(values, 0, sizeof(values));
1485 274 : memset(nulls, false, sizeof(nulls));
1486 274 : memset(replaces, false, sizeof(replaces));
1487 :
1488 274 : ObjectAddressSet(myself, SubscriptionRelationId, subid);
1489 :
1490 274 : switch (stmt->kind)
1491 : {
1492 121 : case ALTER_SUBSCRIPTION_OPTIONS:
1493 : {
1494 121 : supported_opts = (SUBOPT_SLOT_NAME |
1495 : SUBOPT_SYNCHRONOUS_COMMIT | SUBOPT_BINARY |
1496 : SUBOPT_STREAMING | SUBOPT_TWOPHASE_COMMIT |
1497 : SUBOPT_DISABLE_ON_ERR |
1498 : SUBOPT_PASSWORD_REQUIRED |
1499 : SUBOPT_RUN_AS_OWNER | SUBOPT_FAILOVER |
1500 : SUBOPT_RETAIN_DEAD_TUPLES |
1501 : SUBOPT_MAX_RETENTION_DURATION |
1502 : SUBOPT_WAL_RECEIVER_TIMEOUT |
1503 : SUBOPT_ORIGIN);
1504 :
1505 121 : parse_subscription_options(pstate, stmt->options,
1506 : supported_opts, &opts);
1507 :
1508 109 : if (IsSet(opts.specified_opts, SUBOPT_SLOT_NAME))
1509 : {
1510 : /*
1511 : * The subscription must be disabled to allow slot_name as
1512 : * 'none', otherwise, the apply worker will repeatedly try
1513 : * to stream the data using that slot_name which neither
1514 : * exists on the publisher nor the user will be allowed to
1515 : * create it.
1516 : */
1517 39 : if (sub->enabled && !opts.slot_name)
1518 0 : ereport(ERROR,
1519 : (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
1520 : errmsg("cannot set %s for enabled subscription",
1521 : "slot_name = NONE")));
1522 :
1523 39 : if (opts.slot_name)
1524 3 : values[Anum_pg_subscription_subslotname - 1] =
1525 3 : DirectFunctionCall1(namein, CStringGetDatum(opts.slot_name));
1526 : else
1527 36 : nulls[Anum_pg_subscription_subslotname - 1] = true;
1528 39 : replaces[Anum_pg_subscription_subslotname - 1] = true;
1529 : }
1530 :
1531 109 : if (opts.synchronous_commit)
1532 : {
1533 3 : values[Anum_pg_subscription_subsynccommit - 1] =
1534 3 : CStringGetTextDatum(opts.synchronous_commit);
1535 3 : replaces[Anum_pg_subscription_subsynccommit - 1] = true;
1536 : }
1537 :
1538 109 : if (IsSet(opts.specified_opts, SUBOPT_BINARY))
1539 : {
1540 9 : values[Anum_pg_subscription_subbinary - 1] =
1541 9 : BoolGetDatum(opts.binary);
1542 9 : replaces[Anum_pg_subscription_subbinary - 1] = true;
1543 : }
1544 :
1545 109 : if (IsSet(opts.specified_opts, SUBOPT_STREAMING))
1546 : {
1547 15 : values[Anum_pg_subscription_substream - 1] =
1548 15 : CharGetDatum(opts.streaming);
1549 15 : replaces[Anum_pg_subscription_substream - 1] = true;
1550 : }
1551 :
1552 109 : if (IsSet(opts.specified_opts, SUBOPT_DISABLE_ON_ERR))
1553 : {
1554 : values[Anum_pg_subscription_subdisableonerr - 1]
1555 3 : = BoolGetDatum(opts.disableonerr);
1556 : replaces[Anum_pg_subscription_subdisableonerr - 1]
1557 3 : = true;
1558 : }
1559 :
1560 109 : if (IsSet(opts.specified_opts, SUBOPT_PASSWORD_REQUIRED))
1561 : {
1562 : /* Non-superuser may not disable password_required. */
1563 6 : if (!opts.passwordrequired && !superuser())
1564 0 : ereport(ERROR,
1565 : (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
1566 : errmsg("password_required=false is superuser-only"),
1567 : errhint("Subscriptions with the password_required option set to false may only be created or modified by the superuser.")));
1568 :
1569 : values[Anum_pg_subscription_subpasswordrequired - 1]
1570 6 : = BoolGetDatum(opts.passwordrequired);
1571 : replaces[Anum_pg_subscription_subpasswordrequired - 1]
1572 6 : = true;
1573 : }
1574 :
1575 109 : if (IsSet(opts.specified_opts, SUBOPT_RUN_AS_OWNER))
1576 : {
1577 7 : values[Anum_pg_subscription_subrunasowner - 1] =
1578 7 : BoolGetDatum(opts.runasowner);
1579 7 : replaces[Anum_pg_subscription_subrunasowner - 1] = true;
1580 : }
1581 :
1582 109 : if (IsSet(opts.specified_opts, SUBOPT_TWOPHASE_COMMIT))
1583 : {
1584 : /*
1585 : * We need to update both the slot and the subscription
1586 : * for the two_phase option. We can enable the two_phase
1587 : * option for a slot only once the initial data
1588 : * synchronization is done. This is to avoid missing some
1589 : * data as explained in comments atop worker.c.
1590 : */
1591 3 : update_two_phase = !opts.twophase;
1592 :
1593 3 : CheckAlterSubOption(sub, "two_phase", update_two_phase,
1594 : isTopLevel);
1595 :
1596 : /*
1597 : * Modifying the two_phase slot option requires a slot
1598 : * lookup by slot name, so changing the slot name at the
1599 : * same time is not allowed.
1600 : */
1601 3 : if (update_two_phase &&
1602 1 : IsSet(opts.specified_opts, SUBOPT_SLOT_NAME))
1603 0 : ereport(ERROR,
1604 : (errcode(ERRCODE_SYNTAX_ERROR),
1605 : errmsg("\"slot_name\" and \"two_phase\" cannot be altered at the same time")));
1606 :
1607 : /*
1608 : * Note that workers may still survive even if the
1609 : * subscription has been disabled.
1610 : *
1611 : * Ensure workers have already been exited to avoid
1612 : * getting prepared transactions while we are disabling
1613 : * the two_phase option. Otherwise, the changes of an
1614 : * already prepared transaction can be replicated again
1615 : * along with its corresponding commit, leading to
1616 : * duplicate data or errors.
1617 : */
1618 3 : if (logicalrep_workers_find(subid, true, true))
1619 0 : ereport(ERROR,
1620 : (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
1621 : errmsg("cannot alter \"two_phase\" when logical replication worker is still running"),
1622 : errhint("Try again after some time.")));
1623 :
1624 : /*
1625 : * two_phase cannot be disabled if there are any
1626 : * uncommitted prepared transactions present otherwise it
1627 : * can lead to duplicate data or errors as explained in
1628 : * the comment above.
1629 : */
1630 3 : if (update_two_phase &&
1631 1 : sub->twophasestate == LOGICALREP_TWOPHASE_STATE_ENABLED &&
1632 1 : LookupGXactBySubid(subid))
1633 0 : ereport(ERROR,
1634 : (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
1635 : errmsg("cannot disable \"two_phase\" when prepared transactions exist"),
1636 : errhint("Resolve these transactions and try again.")));
1637 :
1638 : /* Change system catalog accordingly */
1639 3 : values[Anum_pg_subscription_subtwophasestate - 1] =
1640 3 : CharGetDatum(opts.twophase ?
1641 : LOGICALREP_TWOPHASE_STATE_PENDING :
1642 : LOGICALREP_TWOPHASE_STATE_DISABLED);
1643 3 : replaces[Anum_pg_subscription_subtwophasestate - 1] = true;
1644 : }
1645 :
1646 109 : if (IsSet(opts.specified_opts, SUBOPT_FAILOVER))
1647 : {
1648 : /*
1649 : * Similar to the two_phase case above, we need to update
1650 : * the failover option for both the slot and the
1651 : * subscription.
1652 : */
1653 8 : update_failover = true;
1654 :
1655 8 : CheckAlterSubOption(sub, "failover", update_failover,
1656 : isTopLevel);
1657 :
1658 4 : values[Anum_pg_subscription_subfailover - 1] =
1659 4 : BoolGetDatum(opts.failover);
1660 4 : replaces[Anum_pg_subscription_subfailover - 1] = true;
1661 : }
1662 :
1663 105 : if (IsSet(opts.specified_opts, SUBOPT_RETAIN_DEAD_TUPLES))
1664 : {
1665 2 : values[Anum_pg_subscription_subretaindeadtuples - 1] =
1666 2 : BoolGetDatum(opts.retaindeadtuples);
1667 2 : replaces[Anum_pg_subscription_subretaindeadtuples - 1] = true;
1668 :
1669 : /*
1670 : * Update the retention status only if there's a change in
1671 : * the retain_dead_tuples option value.
1672 : *
1673 : * Automatically marking retention as active when
1674 : * retain_dead_tuples is enabled may not always be ideal,
1675 : * especially if retention was previously stopped and the
1676 : * user toggles retain_dead_tuples without adjusting the
1677 : * publisher workload. However, this behavior provides a
1678 : * convenient way for users to manually refresh the
1679 : * retention status. Since retention will be stopped again
1680 : * unless the publisher workload is reduced, this approach
1681 : * is acceptable for now.
1682 : */
1683 2 : if (opts.retaindeadtuples != sub->retaindeadtuples)
1684 : {
1685 2 : values[Anum_pg_subscription_subretentionactive - 1] =
1686 2 : BoolGetDatum(opts.retaindeadtuples);
1687 2 : replaces[Anum_pg_subscription_subretentionactive - 1] = true;
1688 :
1689 2 : retention_active = opts.retaindeadtuples;
1690 : }
1691 :
1692 2 : CheckAlterSubOption(sub, "retain_dead_tuples", false, isTopLevel);
1693 :
1694 : /*
1695 : * Workers may continue running even after the
1696 : * subscription has been disabled.
1697 : *
1698 : * To prevent race conditions (as described in
1699 : * CheckAlterSubOption()), ensure that all worker
1700 : * processes have already exited before proceeding.
1701 : */
1702 1 : if (logicalrep_workers_find(subid, true, true))
1703 0 : ereport(ERROR,
1704 : (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
1705 : errmsg("cannot alter retain_dead_tuples when logical replication worker is still running"),
1706 : errhint("Try again after some time.")));
1707 :
1708 : /*
1709 : * Notify the launcher to manage the replication slot for
1710 : * conflict detection. This ensures that replication slot
1711 : * is efficiently handled (created, updated, or dropped)
1712 : * in response to any configuration changes.
1713 : */
1714 1 : ApplyLauncherWakeupAtCommit();
1715 :
1716 1 : check_pub_rdt = opts.retaindeadtuples;
1717 1 : retain_dead_tuples = opts.retaindeadtuples;
1718 : }
1719 :
1720 104 : if (IsSet(opts.specified_opts, SUBOPT_MAX_RETENTION_DURATION))
1721 : {
1722 5 : values[Anum_pg_subscription_submaxretention - 1] =
1723 5 : Int32GetDatum(opts.maxretention);
1724 5 : replaces[Anum_pg_subscription_submaxretention - 1] = true;
1725 :
1726 5 : max_retention = opts.maxretention;
1727 : }
1728 :
1729 : /*
1730 : * Ensure that system configuration parameters are set
1731 : * appropriately to support retain_dead_tuples and
1732 : * max_retention_duration.
1733 : */
1734 104 : if (IsSet(opts.specified_opts, SUBOPT_RETAIN_DEAD_TUPLES) ||
1735 103 : IsSet(opts.specified_opts, SUBOPT_MAX_RETENTION_DURATION))
1736 6 : CheckSubDeadTupleRetention(true, !sub->enabled, NOTICE,
1737 : retain_dead_tuples,
1738 : retention_active,
1739 6 : (max_retention > 0));
1740 :
1741 104 : if (IsSet(opts.specified_opts, SUBOPT_ORIGIN))
1742 : {
1743 5 : values[Anum_pg_subscription_suborigin - 1] =
1744 5 : CStringGetTextDatum(opts.origin);
1745 5 : replaces[Anum_pg_subscription_suborigin - 1] = true;
1746 :
1747 : /*
1748 : * Check if changes from different origins may be received
1749 : * from the publisher when the origin is changed to ANY
1750 : * and retain_dead_tuples is enabled.
1751 : */
1752 7 : check_pub_rdt = retain_dead_tuples &&
1753 2 : pg_strcasecmp(opts.origin, LOGICALREP_ORIGIN_ANY) == 0;
1754 :
1755 5 : origin = opts.origin;
1756 : }
1757 :
1758 104 : if (IsSet(opts.specified_opts, SUBOPT_WAL_RECEIVER_TIMEOUT))
1759 : {
1760 6 : values[Anum_pg_subscription_subwalrcvtimeout - 1] =
1761 6 : CStringGetTextDatum(opts.wal_receiver_timeout);
1762 6 : replaces[Anum_pg_subscription_subwalrcvtimeout - 1] = true;
1763 : }
1764 :
1765 104 : update_tuple = true;
1766 104 : break;
1767 : }
1768 :
1769 53 : case ALTER_SUBSCRIPTION_ENABLED:
1770 : {
1771 53 : parse_subscription_options(pstate, stmt->options,
1772 : SUBOPT_ENABLED, &opts);
1773 : Assert(IsSet(opts.specified_opts, SUBOPT_ENABLED));
1774 :
1775 53 : if (!sub->slotname && opts.enabled)
1776 3 : ereport(ERROR,
1777 : (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
1778 : errmsg("cannot enable subscription that does not have a slot name")));
1779 :
1780 : /*
1781 : * Check track_commit_timestamp only when enabling the
1782 : * subscription in case it was disabled after creation. See
1783 : * comments atop CheckSubDeadTupleRetention() for details.
1784 : */
1785 50 : CheckSubDeadTupleRetention(opts.enabled, !opts.enabled,
1786 50 : WARNING, sub->retaindeadtuples,
1787 50 : sub->retentionactive, false);
1788 :
1789 50 : values[Anum_pg_subscription_subenabled - 1] =
1790 50 : BoolGetDatum(opts.enabled);
1791 50 : replaces[Anum_pg_subscription_subenabled - 1] = true;
1792 :
1793 50 : if (opts.enabled)
1794 28 : ApplyLauncherWakeupAtCommit();
1795 :
1796 50 : update_tuple = true;
1797 :
1798 : /*
1799 : * The subscription might be initially created with
1800 : * connect=false and retain_dead_tuples=true, meaning the
1801 : * remote server's status may not be checked. Ensure this
1802 : * check is conducted now.
1803 : */
1804 50 : check_pub_rdt = sub->retaindeadtuples && opts.enabled;
1805 50 : break;
1806 : }
1807 :
1808 0 : case ALTER_SUBSCRIPTION_SERVER:
1809 : {
1810 : ForeignServer *new_server;
1811 : ObjectAddress referenced;
1812 : AclResult aclresult;
1813 : char *conninfo;
1814 :
1815 : /*
1816 : * Remove what was there before, either another foreign server
1817 : * or a connection string.
1818 : */
1819 0 : if (form->subserver)
1820 : {
1821 0 : deleteDependencyRecordsForSpecific(SubscriptionRelationId, form->oid,
1822 : DEPENDENCY_NORMAL,
1823 : ForeignServerRelationId, form->subserver);
1824 : }
1825 : else
1826 : {
1827 0 : nulls[Anum_pg_subscription_subconninfo - 1] = true;
1828 0 : replaces[Anum_pg_subscription_subconninfo - 1] = true;
1829 : }
1830 :
1831 : /*
1832 : * Check that the subscription owner has USAGE privileges on
1833 : * the server.
1834 : */
1835 0 : new_server = GetForeignServerByName(stmt->servername, false);
1836 0 : aclresult = object_aclcheck(ForeignServerRelationId,
1837 : new_server->serverid,
1838 : form->subowner, ACL_USAGE);
1839 0 : if (aclresult != ACLCHECK_OK)
1840 0 : ereport(ERROR,
1841 : errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
1842 : errmsg("subscription owner \"%s\" does not have permission on foreign server \"%s\"",
1843 : GetUserNameFromId(form->subowner, false),
1844 : ForeignServerName(new_server->serverid)));
1845 :
1846 : /* make sure a user mapping exists */
1847 0 : GetUserMapping(form->subowner, new_server->serverid);
1848 :
1849 0 : conninfo = ForeignServerConnectionString(form->subowner,
1850 : new_server->serverid);
1851 :
1852 : /* Load the library providing us libpq calls. */
1853 0 : load_file("libpqwalreceiver", false);
1854 : /* Check the connection info string. */
1855 0 : walrcv_check_conninfo(conninfo,
1856 : sub->passwordrequired && !sub->ownersuperuser);
1857 :
1858 0 : values[Anum_pg_subscription_subserver - 1] = new_server->serverid;
1859 0 : replaces[Anum_pg_subscription_subserver - 1] = true;
1860 :
1861 0 : ObjectAddressSet(referenced, ForeignServerRelationId, new_server->serverid);
1862 0 : recordDependencyOn(&myself, &referenced, DEPENDENCY_NORMAL);
1863 :
1864 0 : update_tuple = true;
1865 : }
1866 0 : break;
1867 :
1868 10 : case ALTER_SUBSCRIPTION_CONNECTION:
1869 : /* remove reference to foreign server and dependencies, if present */
1870 10 : if (form->subserver)
1871 : {
1872 0 : deleteDependencyRecordsForSpecific(SubscriptionRelationId, form->oid,
1873 : DEPENDENCY_NORMAL,
1874 : ForeignServerRelationId, form->subserver);
1875 :
1876 0 : values[Anum_pg_subscription_subserver - 1] = InvalidOid;
1877 0 : replaces[Anum_pg_subscription_subserver - 1] = true;
1878 : }
1879 :
1880 : /* Load the library providing us libpq calls. */
1881 10 : load_file("libpqwalreceiver", false);
1882 : /* Check the connection info string. */
1883 10 : walrcv_check_conninfo(stmt->conninfo,
1884 : sub->passwordrequired && !sub->ownersuperuser);
1885 :
1886 7 : values[Anum_pg_subscription_subconninfo - 1] =
1887 7 : CStringGetTextDatum(stmt->conninfo);
1888 7 : replaces[Anum_pg_subscription_subconninfo - 1] = true;
1889 7 : update_tuple = true;
1890 :
1891 : /*
1892 : * Since the remote server configuration might have changed,
1893 : * perform a check to ensure it permits enabling
1894 : * retain_dead_tuples.
1895 : */
1896 7 : check_pub_rdt = sub->retaindeadtuples;
1897 7 : break;
1898 :
1899 16 : case ALTER_SUBSCRIPTION_SET_PUBLICATION:
1900 : {
1901 16 : supported_opts = SUBOPT_COPY_DATA | SUBOPT_REFRESH;
1902 16 : parse_subscription_options(pstate, stmt->options,
1903 : supported_opts, &opts);
1904 :
1905 16 : values[Anum_pg_subscription_subpublications - 1] =
1906 16 : publicationListToArray(stmt->publication);
1907 16 : replaces[Anum_pg_subscription_subpublications - 1] = true;
1908 :
1909 16 : update_tuple = true;
1910 :
1911 : /* Refresh if user asked us to. */
1912 16 : if (opts.refresh)
1913 : {
1914 13 : if (!sub->enabled)
1915 0 : ereport(ERROR,
1916 : (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
1917 : errmsg("ALTER SUBSCRIPTION with refresh is not allowed for disabled subscriptions"),
1918 : errhint("Use ALTER SUBSCRIPTION ... SET PUBLICATION ... WITH (refresh = false).")));
1919 :
1920 : /*
1921 : * See ALTER_SUBSCRIPTION_REFRESH_PUBLICATION for details
1922 : * why this is not allowed.
1923 : */
1924 13 : if (sub->twophasestate == LOGICALREP_TWOPHASE_STATE_ENABLED && opts.copy_data)
1925 0 : ereport(ERROR,
1926 : (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
1927 : errmsg("ALTER SUBSCRIPTION with refresh and copy_data is not allowed when two_phase is enabled"),
1928 : errhint("Use ALTER SUBSCRIPTION ... SET PUBLICATION with refresh = false, or with copy_data = false, or use DROP/CREATE SUBSCRIPTION.")));
1929 :
1930 13 : PreventInTransactionBlock(isTopLevel, "ALTER SUBSCRIPTION with refresh");
1931 :
1932 : /* Make sure refresh sees the new list of publications. */
1933 7 : sub->publications = stmt->publication;
1934 :
1935 7 : AlterSubscription_refresh(sub, opts.copy_data,
1936 : stmt->publication);
1937 : }
1938 :
1939 10 : break;
1940 : }
1941 :
1942 27 : case ALTER_SUBSCRIPTION_ADD_PUBLICATION:
1943 : case ALTER_SUBSCRIPTION_DROP_PUBLICATION:
1944 : {
1945 : List *publist;
1946 27 : bool isadd = stmt->kind == ALTER_SUBSCRIPTION_ADD_PUBLICATION;
1947 :
1948 27 : supported_opts = SUBOPT_REFRESH | SUBOPT_COPY_DATA;
1949 27 : parse_subscription_options(pstate, stmt->options,
1950 : supported_opts, &opts);
1951 :
1952 27 : publist = merge_publications(sub->publications, stmt->publication, isadd, stmt->subname);
1953 9 : values[Anum_pg_subscription_subpublications - 1] =
1954 9 : publicationListToArray(publist);
1955 9 : replaces[Anum_pg_subscription_subpublications - 1] = true;
1956 :
1957 9 : update_tuple = true;
1958 :
1959 : /* Refresh if user asked us to. */
1960 9 : if (opts.refresh)
1961 : {
1962 : /* We only need to validate user specified publications. */
1963 3 : List *validate_publications = (isadd) ? stmt->publication : NULL;
1964 :
1965 3 : if (!sub->enabled)
1966 0 : ereport(ERROR,
1967 : (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
1968 : errmsg("ALTER SUBSCRIPTION with refresh is not allowed for disabled subscriptions"),
1969 : /* translator: %s is an SQL ALTER command */
1970 : errhint("Use %s instead.",
1971 : isadd ?
1972 : "ALTER SUBSCRIPTION ... ADD PUBLICATION ... WITH (refresh = false)" :
1973 : "ALTER SUBSCRIPTION ... DROP PUBLICATION ... WITH (refresh = false)")));
1974 :
1975 : /*
1976 : * See ALTER_SUBSCRIPTION_REFRESH_PUBLICATION for details
1977 : * why this is not allowed.
1978 : */
1979 3 : if (sub->twophasestate == LOGICALREP_TWOPHASE_STATE_ENABLED && opts.copy_data)
1980 0 : ereport(ERROR,
1981 : (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
1982 : errmsg("ALTER SUBSCRIPTION with refresh and copy_data is not allowed when two_phase is enabled"),
1983 : /* translator: %s is an SQL ALTER command */
1984 : errhint("Use %s with refresh = false, or with copy_data = false, or use DROP/CREATE SUBSCRIPTION.",
1985 : isadd ?
1986 : "ALTER SUBSCRIPTION ... ADD PUBLICATION" :
1987 : "ALTER SUBSCRIPTION ... DROP PUBLICATION")));
1988 :
1989 3 : PreventInTransactionBlock(isTopLevel, "ALTER SUBSCRIPTION with refresh");
1990 :
1991 : /* Refresh the new list of publications. */
1992 3 : sub->publications = publist;
1993 :
1994 3 : AlterSubscription_refresh(sub, opts.copy_data,
1995 : validate_publications);
1996 : }
1997 :
1998 9 : break;
1999 : }
2000 :
2001 34 : case ALTER_SUBSCRIPTION_REFRESH_PUBLICATION:
2002 : {
2003 34 : if (!sub->enabled)
2004 3 : ereport(ERROR,
2005 : (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
2006 : errmsg("%s is not allowed for disabled subscriptions",
2007 : "ALTER SUBSCRIPTION ... REFRESH PUBLICATION")));
2008 :
2009 31 : parse_subscription_options(pstate, stmt->options,
2010 : SUBOPT_COPY_DATA, &opts);
2011 :
2012 : /*
2013 : * The subscription option "two_phase" requires that
2014 : * replication has passed the initial table synchronization
2015 : * phase before the two_phase becomes properly enabled.
2016 : *
2017 : * But, having reached this two-phase commit "enabled" state
2018 : * we must not allow any subsequent table initialization to
2019 : * occur. So the ALTER SUBSCRIPTION ... REFRESH PUBLICATION is
2020 : * disallowed when the user had requested two_phase = on mode.
2021 : *
2022 : * The exception to this restriction is when copy_data =
2023 : * false, because when copy_data is false the tablesync will
2024 : * start already in READY state and will exit directly without
2025 : * doing anything.
2026 : *
2027 : * For more details see comments atop worker.c.
2028 : */
2029 31 : if (sub->twophasestate == LOGICALREP_TWOPHASE_STATE_ENABLED && opts.copy_data)
2030 0 : ereport(ERROR,
2031 : (errcode(ERRCODE_SYNTAX_ERROR),
2032 : errmsg("ALTER SUBSCRIPTION ... REFRESH PUBLICATION with copy_data is not allowed when two_phase is enabled"),
2033 : errhint("Use ALTER SUBSCRIPTION ... REFRESH PUBLICATION with copy_data = false, or use DROP/CREATE SUBSCRIPTION.")));
2034 :
2035 31 : PreventInTransactionBlock(isTopLevel, "ALTER SUBSCRIPTION ... REFRESH PUBLICATION");
2036 :
2037 28 : AlterSubscription_refresh(sub, opts.copy_data, NULL);
2038 :
2039 27 : break;
2040 : }
2041 :
2042 1 : case ALTER_SUBSCRIPTION_REFRESH_SEQUENCES:
2043 : {
2044 1 : if (!sub->enabled)
2045 0 : ereport(ERROR,
2046 : errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
2047 : errmsg("%s is not allowed for disabled subscriptions",
2048 : "ALTER SUBSCRIPTION ... REFRESH SEQUENCES"));
2049 :
2050 1 : AlterSubscription_refresh_seq(sub);
2051 :
2052 1 : break;
2053 : }
2054 :
2055 12 : case ALTER_SUBSCRIPTION_SKIP:
2056 : {
2057 12 : parse_subscription_options(pstate, stmt->options, SUBOPT_LSN, &opts);
2058 :
2059 : /* ALTER SUBSCRIPTION ... SKIP supports only LSN option */
2060 : Assert(IsSet(opts.specified_opts, SUBOPT_LSN));
2061 :
2062 : /*
2063 : * If the user sets subskiplsn, we do a sanity check to make
2064 : * sure that the specified LSN is a probable value.
2065 : */
2066 9 : if (XLogRecPtrIsValid(opts.lsn))
2067 : {
2068 : ReplOriginId originid;
2069 : char originname[NAMEDATALEN];
2070 : XLogRecPtr remote_lsn;
2071 :
2072 6 : ReplicationOriginNameForLogicalRep(subid, InvalidOid,
2073 : originname, sizeof(originname));
2074 6 : originid = replorigin_by_name(originname, false);
2075 6 : remote_lsn = replorigin_get_progress(originid, false);
2076 :
2077 : /* Check the given LSN is at least a future LSN */
2078 6 : if (XLogRecPtrIsValid(remote_lsn) && opts.lsn < remote_lsn)
2079 0 : ereport(ERROR,
2080 : (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
2081 : errmsg("skip WAL location (LSN %X/%08X) must be greater than origin LSN %X/%08X",
2082 : LSN_FORMAT_ARGS(opts.lsn),
2083 : LSN_FORMAT_ARGS(remote_lsn))));
2084 : }
2085 :
2086 9 : values[Anum_pg_subscription_subskiplsn - 1] = LSNGetDatum(opts.lsn);
2087 9 : replaces[Anum_pg_subscription_subskiplsn - 1] = true;
2088 :
2089 9 : update_tuple = true;
2090 9 : break;
2091 : }
2092 :
2093 0 : default:
2094 0 : elog(ERROR, "unrecognized ALTER SUBSCRIPTION kind %d",
2095 : stmt->kind);
2096 : }
2097 :
2098 : /* Update the catalog if needed. */
2099 217 : if (update_tuple)
2100 : {
2101 189 : tup = heap_modify_tuple(tup, RelationGetDescr(rel), values, nulls,
2102 : replaces);
2103 :
2104 189 : CatalogTupleUpdate(rel, &tup->t_self, tup);
2105 :
2106 189 : heap_freetuple(tup);
2107 : }
2108 :
2109 : /*
2110 : * Try to acquire the connection necessary either for modifying the slot
2111 : * or for checking if the remote server permits enabling
2112 : * retain_dead_tuples.
2113 : *
2114 : * This has to be at the end because otherwise if there is an error while
2115 : * doing the database operations we won't be able to rollback altered
2116 : * slot.
2117 : */
2118 217 : if (update_failover || update_two_phase || check_pub_rdt)
2119 : {
2120 : bool must_use_password;
2121 : char *err;
2122 : WalReceiverConn *wrconn;
2123 :
2124 : /* Load the library providing us libpq calls. */
2125 13 : load_file("libpqwalreceiver", false);
2126 :
2127 : /*
2128 : * Try to connect to the publisher, using the new connection string if
2129 : * available.
2130 : */
2131 13 : must_use_password = sub->passwordrequired && !sub->ownersuperuser;
2132 13 : wrconn = walrcv_connect(stmt->conninfo ? stmt->conninfo : sub->conninfo,
2133 : true, true, must_use_password, sub->name,
2134 : &err);
2135 13 : if (!wrconn)
2136 0 : ereport(ERROR,
2137 : (errcode(ERRCODE_CONNECTION_FAILURE),
2138 : errmsg("subscription \"%s\" could not connect to the publisher: %s",
2139 : sub->name, err)));
2140 :
2141 13 : PG_TRY();
2142 : {
2143 13 : if (retain_dead_tuples)
2144 9 : check_pub_dead_tuple_retention(wrconn);
2145 :
2146 13 : check_publications_origin_tables(wrconn, sub->publications, false,
2147 : retain_dead_tuples, origin, NULL, 0,
2148 : sub->name);
2149 :
2150 13 : if (update_failover || update_two_phase)
2151 5 : walrcv_alter_slot(wrconn, sub->slotname,
2152 : update_failover ? &opts.failover : NULL,
2153 : update_two_phase ? &opts.twophase : NULL);
2154 : }
2155 0 : PG_FINALLY();
2156 : {
2157 13 : walrcv_disconnect(wrconn);
2158 : }
2159 13 : PG_END_TRY();
2160 : }
2161 :
2162 217 : table_close(rel, RowExclusiveLock);
2163 :
2164 217 : InvokeObjectPostAlterHook(SubscriptionRelationId, subid, 0);
2165 :
2166 : /* Wake up related replication workers to handle this change quickly. */
2167 217 : LogicalRepWorkersWakeupAtCommit(subid);
2168 :
2169 217 : return myself;
2170 : }
2171 :
2172 : /*
2173 : * Drop a subscription
2174 : */
2175 : void
2176 136 : DropSubscription(DropSubscriptionStmt *stmt, bool isTopLevel)
2177 : {
2178 : Relation rel;
2179 : ObjectAddress myself;
2180 : HeapTuple tup;
2181 : Oid subid;
2182 : Oid subowner;
2183 : Datum datum;
2184 : bool isnull;
2185 : char *subname;
2186 : char *conninfo;
2187 : char *slotname;
2188 : List *subworkers;
2189 : ListCell *lc;
2190 : char originname[NAMEDATALEN];
2191 136 : char *err = NULL;
2192 136 : WalReceiverConn *wrconn = NULL;
2193 : Form_pg_subscription form;
2194 : List *rstates;
2195 : bool must_use_password;
2196 :
2197 : /*
2198 : * The launcher may concurrently start a new worker for this subscription.
2199 : * During initialization, the worker checks for subscription validity and
2200 : * exits if the subscription has already been dropped. See
2201 : * InitializeLogRepWorker.
2202 : */
2203 136 : rel = table_open(SubscriptionRelationId, RowExclusiveLock);
2204 :
2205 136 : tup = SearchSysCache2(SUBSCRIPTIONNAME, ObjectIdGetDatum(MyDatabaseId),
2206 136 : CStringGetDatum(stmt->subname));
2207 :
2208 136 : if (!HeapTupleIsValid(tup))
2209 : {
2210 6 : table_close(rel, NoLock);
2211 :
2212 6 : if (!stmt->missing_ok)
2213 3 : ereport(ERROR,
2214 : (errcode(ERRCODE_UNDEFINED_OBJECT),
2215 : errmsg("subscription \"%s\" does not exist",
2216 : stmt->subname)));
2217 : else
2218 3 : ereport(NOTICE,
2219 : (errmsg("subscription \"%s\" does not exist, skipping",
2220 : stmt->subname)));
2221 :
2222 50 : return;
2223 : }
2224 :
2225 130 : form = (Form_pg_subscription) GETSTRUCT(tup);
2226 130 : subid = form->oid;
2227 130 : subowner = form->subowner;
2228 130 : must_use_password = !superuser_arg(subowner) && form->subpasswordrequired;
2229 :
2230 : /* must be owner */
2231 130 : if (!object_ownercheck(SubscriptionRelationId, subid, GetUserId()))
2232 0 : aclcheck_error(ACLCHECK_NOT_OWNER, OBJECT_SUBSCRIPTION,
2233 0 : stmt->subname);
2234 :
2235 : /* DROP hook for the subscription being removed */
2236 130 : InvokeObjectDropHook(SubscriptionRelationId, subid, 0);
2237 :
2238 : /*
2239 : * Lock the subscription so nobody else can do anything with it (including
2240 : * the replication workers).
2241 : */
2242 130 : LockSharedObject(SubscriptionRelationId, subid, 0, AccessExclusiveLock);
2243 :
2244 : /* Get subname */
2245 130 : datum = SysCacheGetAttrNotNull(SUBSCRIPTIONOID, tup,
2246 : Anum_pg_subscription_subname);
2247 130 : subname = pstrdup(NameStr(*DatumGetName(datum)));
2248 :
2249 : /* Get conninfo */
2250 130 : if (OidIsValid(form->subserver))
2251 : {
2252 : AclResult aclresult;
2253 :
2254 7 : aclresult = object_aclcheck(ForeignServerRelationId, form->subserver,
2255 : form->subowner, ACL_USAGE);
2256 7 : if (aclresult != ACLCHECK_OK)
2257 : {
2258 : /*
2259 : * Unable to generate connection string because permissions on the
2260 : * foreign server have been removed. Follow the same logic as an
2261 : * unusable subconninfo (which will result in an ERROR later
2262 : * unless slot_name = NONE).
2263 : */
2264 6 : err = psprintf(_("subscription owner \"%s\" does not have permission on foreign server \"%s\""),
2265 : GetUserNameFromId(form->subowner, false),
2266 : ForeignServerName(form->subserver));
2267 6 : conninfo = NULL;
2268 : }
2269 : else
2270 1 : conninfo = ForeignServerConnectionString(form->subowner,
2271 : form->subserver);
2272 : }
2273 : else
2274 : {
2275 123 : datum = SysCacheGetAttrNotNull(SUBSCRIPTIONOID, tup,
2276 : Anum_pg_subscription_subconninfo);
2277 123 : conninfo = TextDatumGetCString(datum);
2278 : }
2279 :
2280 : /* Get slotname */
2281 130 : datum = SysCacheGetAttr(SUBSCRIPTIONOID, tup,
2282 : Anum_pg_subscription_subslotname, &isnull);
2283 130 : if (!isnull)
2284 83 : slotname = pstrdup(NameStr(*DatumGetName(datum)));
2285 : else
2286 47 : slotname = NULL;
2287 :
2288 : /*
2289 : * Since dropping a replication slot is not transactional, the replication
2290 : * slot stays dropped even if the transaction rolls back. So we cannot
2291 : * run DROP SUBSCRIPTION inside a transaction block if dropping the
2292 : * replication slot. Also, in this case, we report a message for dropping
2293 : * the subscription to the cumulative stats system.
2294 : *
2295 : * XXX The command name should really be something like "DROP SUBSCRIPTION
2296 : * of a subscription that is associated with a replication slot", but we
2297 : * don't have the proper facilities for that.
2298 : */
2299 130 : if (slotname)
2300 83 : PreventInTransactionBlock(isTopLevel, "DROP SUBSCRIPTION");
2301 :
2302 127 : ObjectAddressSet(myself, SubscriptionRelationId, subid);
2303 127 : EventTriggerSQLDropAddObject(&myself, true, true);
2304 :
2305 : /* Remove the tuple from catalog. */
2306 127 : CatalogTupleDelete(rel, &tup->t_self);
2307 :
2308 127 : ReleaseSysCache(tup);
2309 :
2310 : /*
2311 : * Stop all the subscription workers immediately.
2312 : *
2313 : * This is necessary if we are dropping the replication slot, so that the
2314 : * slot becomes accessible.
2315 : *
2316 : * It is also necessary if the subscription is disabled and was disabled
2317 : * in the same transaction. Then the workers haven't seen the disabling
2318 : * yet and will still be running, leading to hangs later when we want to
2319 : * drop the replication origin. If the subscription was disabled before
2320 : * this transaction, then there shouldn't be any workers left, so this
2321 : * won't make a difference.
2322 : *
2323 : * New workers won't be started because we hold an exclusive lock on the
2324 : * subscription till the end of the transaction.
2325 : */
2326 127 : subworkers = logicalrep_workers_find(subid, false, true);
2327 208 : foreach(lc, subworkers)
2328 : {
2329 81 : LogicalRepWorker *w = (LogicalRepWorker *) lfirst(lc);
2330 :
2331 81 : logicalrep_worker_stop(w->type, w->subid, w->relid);
2332 : }
2333 127 : list_free(subworkers);
2334 :
2335 : /*
2336 : * Remove the no-longer-useful entry in the launcher's table of apply
2337 : * worker start times.
2338 : *
2339 : * If this transaction rolls back, the launcher might restart a failed
2340 : * apply worker before wal_retrieve_retry_interval milliseconds have
2341 : * elapsed, but that's pretty harmless.
2342 : */
2343 127 : ApplyLauncherForgetWorkerStartTime(subid);
2344 :
2345 : /*
2346 : * Cleanup of tablesync replication origins.
2347 : *
2348 : * Any READY-state relations would already have dealt with clean-ups.
2349 : *
2350 : * Note that the state can't change because we have already stopped both
2351 : * the apply and tablesync workers and they can't restart because of
2352 : * exclusive lock on the subscription.
2353 : */
2354 127 : rstates = GetSubscriptionRelations(subid, true, false, true);
2355 132 : foreach(lc, rstates)
2356 : {
2357 5 : SubscriptionRelState *rstate = (SubscriptionRelState *) lfirst(lc);
2358 5 : Oid relid = rstate->relid;
2359 :
2360 : /* Only cleanup resources of tablesync workers */
2361 5 : if (!OidIsValid(relid))
2362 0 : continue;
2363 :
2364 : /*
2365 : * Drop the tablesync's origin tracking if exists.
2366 : *
2367 : * It is possible that the origin is not yet created for tablesync
2368 : * worker so passing missing_ok = true. This can happen for the states
2369 : * before SUBREL_STATE_DATASYNC.
2370 : */
2371 5 : ReplicationOriginNameForLogicalRep(subid, relid, originname,
2372 : sizeof(originname));
2373 5 : replorigin_drop_by_name(originname, true, false);
2374 : }
2375 :
2376 : /* Clean up dependencies */
2377 127 : deleteDependencyRecordsFor(SubscriptionRelationId, subid, false);
2378 127 : deleteSharedDependencyRecordsFor(SubscriptionRelationId, subid, 0);
2379 :
2380 : /* Remove any associated relation synchronization states. */
2381 127 : RemoveSubscriptionRel(subid, InvalidOid);
2382 :
2383 : /* Remove the origin tracking if exists. */
2384 127 : ReplicationOriginNameForLogicalRep(subid, InvalidOid, originname, sizeof(originname));
2385 127 : replorigin_drop_by_name(originname, true, false);
2386 :
2387 : /*
2388 : * Tell the cumulative stats system that the subscription is getting
2389 : * dropped.
2390 : */
2391 127 : pgstat_drop_subscription(subid);
2392 :
2393 : /*
2394 : * If there is no slot associated with the subscription, we can finish
2395 : * here.
2396 : */
2397 127 : if (!slotname && rstates == NIL)
2398 : {
2399 47 : table_close(rel, NoLock);
2400 47 : return;
2401 : }
2402 :
2403 : /*
2404 : * Try to acquire the connection necessary for dropping slots.
2405 : *
2406 : * Note: If the slotname is NONE/NULL then we allow the command to finish
2407 : * and users need to manually cleanup the apply and tablesync worker slots
2408 : * later.
2409 : *
2410 : * This has to be at the end because otherwise if there is an error while
2411 : * doing the database operations we won't be able to rollback dropped
2412 : * slot.
2413 : */
2414 80 : load_file("libpqwalreceiver", false);
2415 :
2416 80 : if (conninfo)
2417 77 : wrconn = walrcv_connect(conninfo, true, true, must_use_password,
2418 : subname, &err);
2419 :
2420 80 : if (wrconn == NULL)
2421 : {
2422 3 : if (!slotname)
2423 : {
2424 : /* be tidy */
2425 0 : list_free(rstates);
2426 0 : table_close(rel, NoLock);
2427 0 : return;
2428 : }
2429 : else
2430 : {
2431 3 : ReportSlotConnectionError(rstates, subid, slotname, err);
2432 : }
2433 : }
2434 :
2435 77 : PG_TRY();
2436 : {
2437 82 : foreach(lc, rstates)
2438 : {
2439 5 : SubscriptionRelState *rstate = (SubscriptionRelState *) lfirst(lc);
2440 5 : Oid relid = rstate->relid;
2441 :
2442 : /* Only cleanup resources of tablesync workers */
2443 5 : if (!OidIsValid(relid))
2444 0 : continue;
2445 :
2446 : /*
2447 : * Drop the tablesync slots associated with removed tables.
2448 : *
2449 : * For SYNCDONE/READY states, the tablesync slot is known to have
2450 : * already been dropped by the tablesync worker.
2451 : *
2452 : * For other states, there is no certainty, maybe the slot does
2453 : * not exist yet. Also, if we fail after removing some of the
2454 : * slots, next time, it will again try to drop already dropped
2455 : * slots and fail. For these reasons, we allow missing_ok = true
2456 : * for the drop.
2457 : */
2458 5 : if (rstate->state != SUBREL_STATE_SYNCDONE)
2459 : {
2460 5 : char syncslotname[NAMEDATALEN] = {0};
2461 :
2462 5 : ReplicationSlotNameForTablesync(subid, relid, syncslotname,
2463 : sizeof(syncslotname));
2464 5 : ReplicationSlotDropAtPubNode(wrconn, syncslotname, true);
2465 : }
2466 : }
2467 :
2468 77 : list_free(rstates);
2469 :
2470 : /*
2471 : * If there is a slot associated with the subscription, then drop the
2472 : * replication slot at the publisher.
2473 : */
2474 77 : if (slotname)
2475 77 : ReplicationSlotDropAtPubNode(wrconn, slotname, false);
2476 : }
2477 1 : PG_FINALLY();
2478 : {
2479 77 : walrcv_disconnect(wrconn);
2480 : }
2481 77 : PG_END_TRY();
2482 :
2483 76 : table_close(rel, NoLock);
2484 : }
2485 :
2486 : /*
2487 : * Drop the replication slot at the publisher node using the replication
2488 : * connection.
2489 : *
2490 : * missing_ok - if true then only issue a LOG message if the slot doesn't
2491 : * exist.
2492 : */
2493 : void
2494 284 : ReplicationSlotDropAtPubNode(WalReceiverConn *wrconn, char *slotname, bool missing_ok)
2495 : {
2496 : StringInfoData cmd;
2497 :
2498 : Assert(wrconn);
2499 :
2500 284 : load_file("libpqwalreceiver", false);
2501 :
2502 284 : initStringInfo(&cmd);
2503 284 : appendStringInfo(&cmd, "DROP_REPLICATION_SLOT %s WAIT", quote_identifier(slotname));
2504 :
2505 284 : PG_TRY();
2506 : {
2507 : WalRcvExecResult *res;
2508 :
2509 284 : res = walrcv_exec(wrconn, cmd.data, 0, NULL);
2510 :
2511 284 : if (res->status == WALRCV_OK_COMMAND)
2512 : {
2513 : /* NOTICE. Success. */
2514 281 : ereport(NOTICE,
2515 : (errmsg("dropped replication slot \"%s\" on publisher",
2516 : slotname)));
2517 : }
2518 3 : else if (res->status == WALRCV_ERROR &&
2519 2 : missing_ok &&
2520 2 : res->sqlstate == ERRCODE_UNDEFINED_OBJECT)
2521 : {
2522 : /* LOG. Error, but missing_ok = true. */
2523 2 : ereport(LOG,
2524 : (errmsg("could not drop replication slot \"%s\" on publisher: %s",
2525 : slotname, res->err)));
2526 : }
2527 : else
2528 : {
2529 : /* ERROR. */
2530 1 : ereport(ERROR,
2531 : (errcode(ERRCODE_CONNECTION_FAILURE),
2532 : errmsg("could not drop replication slot \"%s\" on publisher: %s",
2533 : slotname, res->err)));
2534 : }
2535 :
2536 283 : walrcv_clear_result(res);
2537 : }
2538 1 : PG_FINALLY();
2539 : {
2540 284 : pfree(cmd.data);
2541 : }
2542 284 : PG_END_TRY();
2543 283 : }
2544 :
2545 : /*
2546 : * Internal workhorse for changing a subscription owner
2547 : */
2548 : static void
2549 9 : AlterSubscriptionOwner_internal(Relation rel, HeapTuple tup, Oid newOwnerId)
2550 : {
2551 : Form_pg_subscription form;
2552 : AclResult aclresult;
2553 :
2554 9 : form = (Form_pg_subscription) GETSTRUCT(tup);
2555 :
2556 9 : if (form->subowner == newOwnerId)
2557 2 : return;
2558 :
2559 7 : if (!object_ownercheck(SubscriptionRelationId, form->oid, GetUserId()))
2560 0 : aclcheck_error(ACLCHECK_NOT_OWNER, OBJECT_SUBSCRIPTION,
2561 0 : NameStr(form->subname));
2562 :
2563 : /*
2564 : * Don't allow non-superuser modification of a subscription with
2565 : * password_required=false.
2566 : */
2567 7 : if (!form->subpasswordrequired && !superuser())
2568 0 : ereport(ERROR,
2569 : (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
2570 : errmsg("password_required=false is superuser-only"),
2571 : errhint("Subscriptions with the password_required option set to false may only be created or modified by the superuser.")));
2572 :
2573 : /* Must be able to become new owner */
2574 7 : check_can_set_role(GetUserId(), newOwnerId);
2575 :
2576 : /*
2577 : * current owner must have CREATE on database
2578 : *
2579 : * This is consistent with how ALTER SCHEMA ... OWNER TO works, but some
2580 : * other object types behave differently (e.g. you can't give a table to a
2581 : * user who lacks CREATE privileges on a schema).
2582 : */
2583 4 : aclresult = object_aclcheck(DatabaseRelationId, MyDatabaseId,
2584 : GetUserId(), ACL_CREATE);
2585 4 : if (aclresult != ACLCHECK_OK)
2586 0 : aclcheck_error(aclresult, OBJECT_DATABASE,
2587 0 : get_database_name(MyDatabaseId));
2588 :
2589 : /*
2590 : * If the subscription uses a server, check that the new owner has USAGE
2591 : * privileges on the server and that a user mapping exists. Note: does not
2592 : * re-check the resulting connection string.
2593 : */
2594 4 : if (OidIsValid(form->subserver))
2595 : {
2596 0 : Oid serverid = form->subserver;
2597 :
2598 0 : aclresult = object_aclcheck(ForeignServerRelationId, serverid, newOwnerId, ACL_USAGE);
2599 0 : if (aclresult != ACLCHECK_OK)
2600 0 : ereport(ERROR,
2601 : errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
2602 : errmsg("new subscription owner \"%s\" does not have permission on foreign server \"%s\"",
2603 : GetUserNameFromId(newOwnerId, false),
2604 : ForeignServerName(serverid)));
2605 :
2606 : /* make sure a user mapping exists */
2607 0 : GetUserMapping(newOwnerId, serverid);
2608 : }
2609 :
2610 4 : form->subowner = newOwnerId;
2611 4 : CatalogTupleUpdate(rel, &tup->t_self, tup);
2612 :
2613 : /* Update owner dependency reference */
2614 4 : changeDependencyOnOwner(SubscriptionRelationId,
2615 : form->oid,
2616 : newOwnerId);
2617 :
2618 4 : InvokeObjectPostAlterHook(SubscriptionRelationId,
2619 : form->oid, 0);
2620 :
2621 : /* Wake up related background processes to handle this change quickly. */
2622 4 : ApplyLauncherWakeupAtCommit();
2623 4 : LogicalRepWorkersWakeupAtCommit(form->oid);
2624 : }
2625 :
2626 : /*
2627 : * Change subscription owner -- by name
2628 : */
2629 : ObjectAddress
2630 9 : AlterSubscriptionOwner(const char *name, Oid newOwnerId)
2631 : {
2632 : Oid subid;
2633 : HeapTuple tup;
2634 : Relation rel;
2635 : ObjectAddress address;
2636 : Form_pg_subscription form;
2637 :
2638 9 : rel = table_open(SubscriptionRelationId, RowExclusiveLock);
2639 :
2640 9 : tup = SearchSysCacheCopy2(SUBSCRIPTIONNAME, ObjectIdGetDatum(MyDatabaseId),
2641 : CStringGetDatum(name));
2642 :
2643 9 : if (!HeapTupleIsValid(tup))
2644 0 : ereport(ERROR,
2645 : (errcode(ERRCODE_UNDEFINED_OBJECT),
2646 : errmsg("subscription \"%s\" does not exist", name)));
2647 :
2648 9 : form = (Form_pg_subscription) GETSTRUCT(tup);
2649 9 : subid = form->oid;
2650 :
2651 9 : AlterSubscriptionOwner_internal(rel, tup, newOwnerId);
2652 :
2653 6 : ObjectAddressSet(address, SubscriptionRelationId, subid);
2654 :
2655 6 : heap_freetuple(tup);
2656 :
2657 6 : table_close(rel, RowExclusiveLock);
2658 :
2659 6 : return address;
2660 : }
2661 :
2662 : /*
2663 : * Change subscription owner -- by OID
2664 : */
2665 : void
2666 0 : AlterSubscriptionOwner_oid(Oid subid, Oid newOwnerId)
2667 : {
2668 : HeapTuple tup;
2669 : Relation rel;
2670 :
2671 0 : rel = table_open(SubscriptionRelationId, RowExclusiveLock);
2672 :
2673 0 : tup = SearchSysCacheCopy1(SUBSCRIPTIONOID, ObjectIdGetDatum(subid));
2674 :
2675 0 : if (!HeapTupleIsValid(tup))
2676 0 : ereport(ERROR,
2677 : (errcode(ERRCODE_UNDEFINED_OBJECT),
2678 : errmsg("subscription with OID %u does not exist", subid)));
2679 :
2680 0 : AlterSubscriptionOwner_internal(rel, tup, newOwnerId);
2681 :
2682 0 : heap_freetuple(tup);
2683 :
2684 0 : table_close(rel, RowExclusiveLock);
2685 0 : }
2686 :
2687 : /*
2688 : * Check and log a warning if the publisher has subscribed to the same table,
2689 : * its partition ancestors (if it's a partition), or its partition children (if
2690 : * it's a partitioned table), from some other publishers. This check is
2691 : * required in the following scenarios:
2692 : *
2693 : * 1) For CREATE SUBSCRIPTION and ALTER SUBSCRIPTION ... REFRESH PUBLICATION
2694 : * statements with "copy_data = true" and "origin = none":
2695 : * - Warn the user that data with an origin might have been copied.
2696 : * - This check is skipped for tables already added, as incremental sync via
2697 : * WAL allows origin tracking. The list of such tables is in
2698 : * subrel_local_oids.
2699 : *
2700 : * 2) For CREATE SUBSCRIPTION and ALTER SUBSCRIPTION ... REFRESH PUBLICATION
2701 : * statements with "retain_dead_tuples = true" and "origin = any", and for
2702 : * ALTER SUBSCRIPTION statements that modify retain_dead_tuples or origin,
2703 : * or when the publisher's status changes (e.g., due to a connection string
2704 : * update):
2705 : * - Warn the user that only conflict detection info for local changes on
2706 : * the publisher is retained. Data from other origins may lack sufficient
2707 : * details for reliable conflict detection.
2708 : * - See comments atop worker.c for more details.
2709 : */
2710 : static void
2711 175 : check_publications_origin_tables(WalReceiverConn *wrconn, List *publications,
2712 : bool copydata, bool retain_dead_tuples,
2713 : char *origin, Oid *subrel_local_oids,
2714 : int subrel_count, char *subname)
2715 : {
2716 : WalRcvExecResult *res;
2717 : StringInfoData cmd;
2718 : TupleTableSlot *slot;
2719 175 : Oid tableRow[1] = {TEXTOID};
2720 175 : List *publist = NIL;
2721 : int i;
2722 : bool check_rdt;
2723 : bool check_table_sync;
2724 350 : bool origin_none = origin &&
2725 175 : pg_strcasecmp(origin, LOGICALREP_ORIGIN_NONE) == 0;
2726 :
2727 : /*
2728 : * Enable retain_dead_tuples checks only when origin is set to 'any',
2729 : * since with origin='none' only local changes are replicated to the
2730 : * subscriber.
2731 : */
2732 175 : check_rdt = retain_dead_tuples && !origin_none;
2733 :
2734 : /*
2735 : * Enable table synchronization checks only when origin is 'none', to
2736 : * ensure that data from other origins is not inadvertently copied.
2737 : */
2738 175 : check_table_sync = copydata && origin_none;
2739 :
2740 : /* retain_dead_tuples and table sync checks occur separately */
2741 : Assert(!(check_rdt && check_table_sync));
2742 :
2743 : /* Return if no checks are required */
2744 175 : if (!check_rdt && !check_table_sync)
2745 161 : return;
2746 :
2747 14 : initStringInfo(&cmd);
2748 14 : appendStringInfoString(&cmd,
2749 : "SELECT DISTINCT P.pubname AS pubname\n"
2750 : "FROM pg_publication P,\n"
2751 : " LATERAL pg_get_publication_tables(P.pubname) GPT\n"
2752 : " JOIN pg_subscription_rel PS ON (GPT.relid = PS.srrelid OR"
2753 : " GPT.relid IN (SELECT relid FROM pg_partition_ancestors(PS.srrelid) UNION"
2754 : " SELECT relid FROM pg_partition_tree(PS.srrelid))),\n"
2755 : " pg_class C JOIN pg_namespace N ON (N.oid = C.relnamespace)\n"
2756 : "WHERE C.oid = GPT.relid AND P.pubname IN (");
2757 14 : GetPublicationsStr(publications, &cmd, true);
2758 14 : appendStringInfoString(&cmd, ")\n");
2759 :
2760 : /*
2761 : * In case of ALTER SUBSCRIPTION ... REFRESH PUBLICATION,
2762 : * subrel_local_oids contains the list of relation oids that are already
2763 : * present on the subscriber. This check should be skipped for these
2764 : * tables if checking for table sync scenario. However, when handling the
2765 : * retain_dead_tuples scenario, ensure all tables are checked, as some
2766 : * existing tables may now include changes from other origins due to newly
2767 : * created subscriptions on the publisher.
2768 : */
2769 14 : if (check_table_sync)
2770 : {
2771 14 : for (i = 0; i < subrel_count; i++)
2772 : {
2773 4 : Oid relid = subrel_local_oids[i];
2774 4 : char *schemaname = get_namespace_name(get_rel_namespace(relid));
2775 4 : char *tablename = get_rel_name(relid);
2776 :
2777 4 : appendStringInfo(&cmd, "AND NOT (N.nspname = '%s' AND C.relname = '%s')\n",
2778 : schemaname, tablename);
2779 : }
2780 : }
2781 :
2782 14 : res = walrcv_exec(wrconn, cmd.data, 1, tableRow);
2783 14 : pfree(cmd.data);
2784 :
2785 14 : if (res->status != WALRCV_OK_TUPLES)
2786 0 : ereport(ERROR,
2787 : (errcode(ERRCODE_CONNECTION_FAILURE),
2788 : errmsg("could not receive list of replicated tables from the publisher: %s",
2789 : res->err)));
2790 :
2791 : /* Process publications. */
2792 14 : slot = MakeSingleTupleTableSlot(res->tupledesc, &TTSOpsMinimalTuple);
2793 19 : while (tuplestore_gettupleslot(res->tuplestore, true, false, slot))
2794 : {
2795 : char *pubname;
2796 : bool isnull;
2797 :
2798 5 : pubname = TextDatumGetCString(slot_getattr(slot, 1, &isnull));
2799 : Assert(!isnull);
2800 :
2801 5 : ExecClearTuple(slot);
2802 5 : publist = list_append_unique(publist, makeString(pubname));
2803 : }
2804 :
2805 : /*
2806 : * Log a warning if the publisher has subscribed to the same table from
2807 : * some other publisher. We cannot know the origin of data during the
2808 : * initial sync. Data origins can be found only from the WAL by looking at
2809 : * the origin id.
2810 : *
2811 : * XXX: For simplicity, we don't check whether the table has any data or
2812 : * not. If the table doesn't have any data then we don't need to
2813 : * distinguish between data having origin and data not having origin so we
2814 : * can avoid logging a warning for table sync scenario.
2815 : */
2816 14 : if (publist)
2817 : {
2818 : StringInfoData pubnames;
2819 :
2820 : /* Prepare the list of publication(s) for warning message. */
2821 5 : initStringInfo(&pubnames);
2822 5 : GetPublicationsStr(publist, &pubnames, false);
2823 :
2824 5 : if (check_table_sync)
2825 4 : ereport(WARNING,
2826 : errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
2827 : errmsg("subscription \"%s\" requested copy_data with origin = NONE but might copy data that had a different origin",
2828 : subname),
2829 : errdetail_plural("The subscription subscribes to a publication (%s) that contains tables that are written to by other subscriptions.",
2830 : "The subscription subscribes to publications (%s) that contain tables that are written to by other subscriptions.",
2831 : list_length(publist), pubnames.data),
2832 : errhint("Verify that initial data copied from the publisher tables did not come from other origins."));
2833 : else
2834 1 : ereport(WARNING,
2835 : errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
2836 : errmsg("subscription \"%s\" enabled retain_dead_tuples but might not reliably detect conflicts for changes from different origins",
2837 : subname),
2838 : errdetail_plural("The subscription subscribes to a publication (%s) that contains tables that are written to by other subscriptions.",
2839 : "The subscription subscribes to publications (%s) that contain tables that are written to by other subscriptions.",
2840 : list_length(publist), pubnames.data),
2841 : errhint("Consider using origin = NONE or disabling retain_dead_tuples."));
2842 : }
2843 :
2844 14 : ExecDropSingleTupleTableSlot(slot);
2845 :
2846 14 : walrcv_clear_result(res);
2847 : }
2848 :
2849 : /*
2850 : * This function is similar to check_publications_origin_tables and serves
2851 : * same purpose for sequences.
2852 : */
2853 : static void
2854 163 : check_publications_origin_sequences(WalReceiverConn *wrconn, List *publications,
2855 : bool copydata, char *origin,
2856 : Oid *subrel_local_oids, int subrel_count,
2857 : char *subname)
2858 : {
2859 : WalRcvExecResult *res;
2860 : StringInfoData cmd;
2861 : TupleTableSlot *slot;
2862 163 : Oid tableRow[1] = {TEXTOID};
2863 163 : List *publist = NIL;
2864 :
2865 : /*
2866 : * Enable sequence synchronization checks only when origin is 'none' , to
2867 : * ensure that sequence data from other origins is not inadvertently
2868 : * copied. This check is necessary if the publisher is running PG19 or
2869 : * later, where logical replication sequence synchronization is supported.
2870 : */
2871 173 : if (!copydata || pg_strcasecmp(origin, LOGICALREP_ORIGIN_NONE) != 0 ||
2872 10 : walrcv_server_version(wrconn) < 190000)
2873 153 : return;
2874 :
2875 10 : initStringInfo(&cmd);
2876 10 : appendStringInfoString(&cmd,
2877 : "SELECT DISTINCT P.pubname AS pubname\n"
2878 : "FROM pg_publication P,\n"
2879 : " LATERAL pg_get_publication_sequences(P.pubname) GPS\n"
2880 : " JOIN pg_subscription_rel PS ON (GPS.relid = PS.srrelid),\n"
2881 : " pg_class C JOIN pg_namespace N ON (N.oid = C.relnamespace)\n"
2882 : "WHERE C.oid = GPS.relid AND P.pubname IN (");
2883 :
2884 10 : GetPublicationsStr(publications, &cmd, true);
2885 10 : appendStringInfoString(&cmd, ")\n");
2886 :
2887 : /*
2888 : * In case of ALTER SUBSCRIPTION ... REFRESH PUBLICATION,
2889 : * subrel_local_oids contains the list of relations that are already
2890 : * present on the subscriber. This check should be skipped as these will
2891 : * not be re-synced.
2892 : */
2893 10 : for (int i = 0; i < subrel_count; i++)
2894 : {
2895 0 : Oid relid = subrel_local_oids[i];
2896 0 : char *schemaname = get_namespace_name(get_rel_namespace(relid));
2897 0 : char *seqname = get_rel_name(relid);
2898 :
2899 0 : appendStringInfo(&cmd,
2900 : "AND NOT (N.nspname = '%s' AND C.relname = '%s')\n",
2901 : schemaname, seqname);
2902 : }
2903 :
2904 10 : res = walrcv_exec(wrconn, cmd.data, 1, tableRow);
2905 10 : pfree(cmd.data);
2906 :
2907 10 : if (res->status != WALRCV_OK_TUPLES)
2908 0 : ereport(ERROR,
2909 : (errcode(ERRCODE_CONNECTION_FAILURE),
2910 : errmsg("could not receive list of replicated sequences from the publisher: %s",
2911 : res->err)));
2912 :
2913 : /* Process publications. */
2914 10 : slot = MakeSingleTupleTableSlot(res->tupledesc, &TTSOpsMinimalTuple);
2915 10 : while (tuplestore_gettupleslot(res->tuplestore, true, false, slot))
2916 : {
2917 : char *pubname;
2918 : bool isnull;
2919 :
2920 0 : pubname = TextDatumGetCString(slot_getattr(slot, 1, &isnull));
2921 : Assert(!isnull);
2922 :
2923 0 : ExecClearTuple(slot);
2924 0 : publist = list_append_unique(publist, makeString(pubname));
2925 : }
2926 :
2927 : /*
2928 : * Log a warning if the publisher has subscribed to the same sequence from
2929 : * some other publisher. We cannot know the origin of sequences data
2930 : * during the initial sync.
2931 : */
2932 10 : if (publist)
2933 : {
2934 : StringInfoData pubnames;
2935 :
2936 : /* Prepare the list of publication(s) for warning message. */
2937 0 : initStringInfo(&pubnames);
2938 0 : GetPublicationsStr(publist, &pubnames, false);
2939 :
2940 0 : ereport(WARNING,
2941 : errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
2942 : errmsg("subscription \"%s\" requested copy_data with origin = NONE but might copy data that had a different origin",
2943 : subname),
2944 : errdetail_plural("The subscription subscribes to a publication (%s) that contains sequences that are written to by other subscriptions.",
2945 : "The subscription subscribes to publications (%s) that contain sequences that are written to by other subscriptions.",
2946 : list_length(publist), pubnames.data),
2947 : errhint("Verify that initial data copied from the publisher sequences did not come from other origins."));
2948 : }
2949 :
2950 10 : ExecDropSingleTupleTableSlot(slot);
2951 :
2952 10 : walrcv_clear_result(res);
2953 : }
2954 :
2955 : /*
2956 : * Determine whether the retain_dead_tuples can be enabled based on the
2957 : * publisher's status.
2958 : *
2959 : * This option is disallowed if the publisher is running a version earlier
2960 : * than the PG19, or if the publisher is in recovery (i.e., it is a standby
2961 : * server).
2962 : *
2963 : * See comments atop worker.c for a detailed explanation.
2964 : */
2965 : static void
2966 12 : check_pub_dead_tuple_retention(WalReceiverConn *wrconn)
2967 : {
2968 : WalRcvExecResult *res;
2969 12 : Oid RecoveryRow[1] = {BOOLOID};
2970 : TupleTableSlot *slot;
2971 : bool isnull;
2972 : bool remote_in_recovery;
2973 :
2974 12 : if (walrcv_server_version(wrconn) < 190000)
2975 0 : ereport(ERROR,
2976 : errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
2977 : errmsg("cannot enable retain_dead_tuples if the publisher is running a version earlier than PostgreSQL 19"));
2978 :
2979 12 : res = walrcv_exec(wrconn, "SELECT pg_is_in_recovery()", 1, RecoveryRow);
2980 :
2981 12 : if (res->status != WALRCV_OK_TUPLES)
2982 0 : ereport(ERROR,
2983 : (errcode(ERRCODE_CONNECTION_FAILURE),
2984 : errmsg("could not obtain recovery progress from the publisher: %s",
2985 : res->err)));
2986 :
2987 12 : slot = MakeSingleTupleTableSlot(res->tupledesc, &TTSOpsMinimalTuple);
2988 12 : if (!tuplestore_gettupleslot(res->tuplestore, true, false, slot))
2989 0 : elog(ERROR, "failed to fetch tuple for the recovery progress");
2990 :
2991 12 : remote_in_recovery = DatumGetBool(slot_getattr(slot, 1, &isnull));
2992 :
2993 12 : if (remote_in_recovery)
2994 0 : ereport(ERROR,
2995 : errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
2996 : errmsg("cannot enable retain_dead_tuples if the publisher is in recovery"));
2997 :
2998 12 : ExecDropSingleTupleTableSlot(slot);
2999 :
3000 12 : walrcv_clear_result(res);
3001 12 : }
3002 :
3003 : /*
3004 : * Check if the subscriber's configuration is adequate to enable the
3005 : * retain_dead_tuples option.
3006 : *
3007 : * Issue an ERROR if the wal_level does not support the use of replication
3008 : * slots when check_guc is set to true.
3009 : *
3010 : * Issue a WARNING if track_commit_timestamp is not enabled when check_guc is
3011 : * set to true. This is only to highlight the importance of enabling
3012 : * track_commit_timestamp instead of catching all the misconfigurations, as
3013 : * this setting can be adjusted after subscription creation. Without it, the
3014 : * apply worker will simply skip conflict detection.
3015 : *
3016 : * Issue a WARNING or NOTICE if the subscription is disabled and the retention
3017 : * is active. Do not raise an ERROR since users can only modify
3018 : * retain_dead_tuples for disabled subscriptions. And as long as the
3019 : * subscription is enabled promptly, it will not pose issues.
3020 : *
3021 : * Issue a NOTICE to inform users that max_retention_duration is
3022 : * ineffective when retain_dead_tuples is disabled for a subscription. An ERROR
3023 : * is not issued because setting max_retention_duration causes no harm,
3024 : * even when it is ineffective.
3025 : */
3026 : void
3027 260 : CheckSubDeadTupleRetention(bool check_guc, bool sub_disabled,
3028 : int elevel_for_sub_disabled,
3029 : bool retain_dead_tuples, bool retention_active,
3030 : bool max_retention_set)
3031 : {
3032 : Assert(elevel_for_sub_disabled == NOTICE ||
3033 : elevel_for_sub_disabled == WARNING);
3034 :
3035 260 : if (retain_dead_tuples)
3036 : {
3037 17 : if (check_guc && wal_level < WAL_LEVEL_REPLICA)
3038 0 : ereport(ERROR,
3039 : errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
3040 : errmsg("\"wal_level\" is insufficient to create the replication slot required by retain_dead_tuples"),
3041 : errhint("\"wal_level\" must be set to \"replica\" or \"logical\" at server start."));
3042 :
3043 17 : if (check_guc && !track_commit_timestamp)
3044 4 : ereport(WARNING,
3045 : errcode(ERRCODE_INVALID_PARAMETER_VALUE),
3046 : errmsg("commit timestamp and origin data required for detecting conflicts won't be retained"),
3047 : errhint("Consider setting \"%s\" to true.",
3048 : "track_commit_timestamp"));
3049 :
3050 17 : if (sub_disabled && retention_active)
3051 7 : ereport(elevel_for_sub_disabled,
3052 : errcode(ERRCODE_INVALID_PARAMETER_VALUE),
3053 : errmsg("deleted rows to detect conflicts would not be removed until the subscription is enabled"),
3054 : (elevel_for_sub_disabled > NOTICE)
3055 : ? errhint("Consider setting %s to false.",
3056 : "retain_dead_tuples") : 0);
3057 : }
3058 243 : else if (max_retention_set)
3059 : {
3060 3 : ereport(NOTICE,
3061 : errcode(ERRCODE_INVALID_PARAMETER_VALUE),
3062 : errmsg("max_retention_duration is ineffective when retain_dead_tuples is disabled"));
3063 : }
3064 260 : }
3065 :
3066 : /*
3067 : * Return true iff 'rv' is a member of the list.
3068 : */
3069 : static bool
3070 281 : list_member_rangevar(const List *list, RangeVar *rv)
3071 : {
3072 1022 : foreach_ptr(PublicationRelKind, relinfo, list)
3073 : {
3074 462 : if (equal(relinfo->rv, rv))
3075 1 : return true;
3076 : }
3077 :
3078 280 : return false;
3079 : }
3080 :
3081 : /*
3082 : * Get the list of tables and sequences which belong to specified publications
3083 : * on the publisher connection.
3084 : *
3085 : * Note that we don't support the case where the column list is different for
3086 : * the same table in different publications to avoid sending unwanted column
3087 : * information for some of the rows. This can happen when both the column
3088 : * list and row filter are specified for different publications.
3089 : */
3090 : static List *
3091 162 : fetch_relation_list(WalReceiverConn *wrconn, List *publications)
3092 : {
3093 : WalRcvExecResult *res;
3094 : StringInfoData cmd;
3095 : TupleTableSlot *slot;
3096 162 : Oid tableRow[4] = {TEXTOID, TEXTOID, CHAROID, InvalidOid};
3097 162 : List *relationlist = NIL;
3098 162 : int server_version = walrcv_server_version(wrconn);
3099 162 : bool check_columnlist = (server_version >= 150000);
3100 162 : int column_count = check_columnlist ? 4 : 3;
3101 : StringInfoData pub_names;
3102 :
3103 162 : initStringInfo(&cmd);
3104 162 : initStringInfo(&pub_names);
3105 :
3106 : /* Build the pub_names comma-separated string. */
3107 162 : GetPublicationsStr(publications, &pub_names, true);
3108 :
3109 : /* Get the list of relations from the publisher */
3110 162 : if (server_version >= 160000)
3111 : {
3112 162 : tableRow[3] = INT2VECTOROID;
3113 :
3114 : /*
3115 : * From version 16, we allowed passing multiple publications to the
3116 : * function pg_get_publication_tables. This helped to filter out the
3117 : * partition table whose ancestor is also published in this
3118 : * publication array.
3119 : *
3120 : * Join pg_get_publication_tables with pg_publication to exclude
3121 : * non-existing publications.
3122 : *
3123 : * Note that attrs are always stored in sorted order so we don't need
3124 : * to worry if different publications have specified them in a
3125 : * different order. See pub_collist_validate.
3126 : */
3127 162 : appendStringInfo(&cmd, "SELECT DISTINCT n.nspname, c.relname, c.relkind, gpt.attrs\n"
3128 : " FROM pg_class c\n"
3129 : " JOIN pg_namespace n ON n.oid = c.relnamespace\n"
3130 : " JOIN ( SELECT (pg_get_publication_tables(VARIADIC array_agg(pubname::text))).*\n"
3131 : " FROM pg_publication\n"
3132 : " WHERE pubname IN ( %s )) AS gpt\n"
3133 : " ON gpt.relid = c.oid\n",
3134 : pub_names.data);
3135 :
3136 : /* From version 19, inclusion of sequences in the target is supported */
3137 162 : if (server_version >= 190000)
3138 162 : appendStringInfo(&cmd,
3139 : "UNION ALL\n"
3140 : " SELECT DISTINCT s.schemaname, s.sequencename, " CppAsString2(RELKIND_SEQUENCE) "::\"char\" AS relkind, NULL::int2vector AS attrs\n"
3141 : " FROM pg_catalog.pg_publication_sequences s\n"
3142 : " WHERE s.pubname IN ( %s )",
3143 : pub_names.data);
3144 : }
3145 : else
3146 : {
3147 0 : tableRow[3] = NAMEARRAYOID;
3148 0 : appendStringInfoString(&cmd, "SELECT DISTINCT t.schemaname, t.tablename, " CppAsString2(RELKIND_RELATION) "::\"char\" AS relkind \n");
3149 :
3150 : /* Get column lists for each relation if the publisher supports it */
3151 0 : if (check_columnlist)
3152 0 : appendStringInfoString(&cmd, ", t.attnames\n");
3153 :
3154 0 : appendStringInfo(&cmd, "FROM pg_catalog.pg_publication_tables t\n"
3155 : " WHERE t.pubname IN ( %s )",
3156 : pub_names.data);
3157 : }
3158 :
3159 162 : pfree(pub_names.data);
3160 :
3161 162 : res = walrcv_exec(wrconn, cmd.data, column_count, tableRow);
3162 162 : pfree(cmd.data);
3163 :
3164 162 : if (res->status != WALRCV_OK_TUPLES)
3165 0 : ereport(ERROR,
3166 : (errcode(ERRCODE_CONNECTION_FAILURE),
3167 : errmsg("could not receive list of replicated tables from the publisher: %s",
3168 : res->err)));
3169 :
3170 : /* Process tables. */
3171 162 : slot = MakeSingleTupleTableSlot(res->tupledesc, &TTSOpsMinimalTuple);
3172 459 : while (tuplestore_gettupleslot(res->tuplestore, true, false, slot))
3173 : {
3174 : char *nspname;
3175 : char *relname;
3176 : bool isnull;
3177 : char relkind;
3178 298 : PublicationRelKind *relinfo = palloc_object(PublicationRelKind);
3179 :
3180 298 : nspname = TextDatumGetCString(slot_getattr(slot, 1, &isnull));
3181 : Assert(!isnull);
3182 298 : relname = TextDatumGetCString(slot_getattr(slot, 2, &isnull));
3183 : Assert(!isnull);
3184 298 : relkind = DatumGetChar(slot_getattr(slot, 3, &isnull));
3185 : Assert(!isnull);
3186 :
3187 298 : relinfo->rv = makeRangeVar(nspname, relname, -1);
3188 298 : relinfo->relkind = relkind;
3189 :
3190 298 : if (relkind != RELKIND_SEQUENCE &&
3191 281 : check_columnlist &&
3192 281 : list_member_rangevar(relationlist, relinfo->rv))
3193 1 : ereport(ERROR,
3194 : errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
3195 : errmsg("cannot use different column lists for table \"%s.%s\" in different publications",
3196 : nspname, relname));
3197 : else
3198 297 : relationlist = lappend(relationlist, relinfo);
3199 :
3200 297 : ExecClearTuple(slot);
3201 : }
3202 161 : ExecDropSingleTupleTableSlot(slot);
3203 :
3204 161 : walrcv_clear_result(res);
3205 :
3206 161 : return relationlist;
3207 : }
3208 :
3209 : /*
3210 : * This is to report the connection failure while dropping replication slots.
3211 : * Here, we report the WARNING for all tablesync slots so that user can drop
3212 : * them manually, if required.
3213 : */
3214 : static void
3215 3 : ReportSlotConnectionError(List *rstates, Oid subid, char *slotname, char *err)
3216 : {
3217 : ListCell *lc;
3218 :
3219 3 : foreach(lc, rstates)
3220 : {
3221 0 : SubscriptionRelState *rstate = (SubscriptionRelState *) lfirst(lc);
3222 0 : Oid relid = rstate->relid;
3223 :
3224 : /* Only cleanup resources of tablesync workers */
3225 0 : if (!OidIsValid(relid))
3226 0 : continue;
3227 :
3228 : /*
3229 : * Caller needs to ensure that relstate doesn't change underneath us.
3230 : * See DropSubscription where we get the relstates.
3231 : */
3232 0 : if (rstate->state != SUBREL_STATE_SYNCDONE)
3233 : {
3234 0 : char syncslotname[NAMEDATALEN] = {0};
3235 :
3236 0 : ReplicationSlotNameForTablesync(subid, relid, syncslotname,
3237 : sizeof(syncslotname));
3238 0 : elog(WARNING, "could not drop tablesync replication slot \"%s\"",
3239 : syncslotname);
3240 : }
3241 : }
3242 :
3243 3 : ereport(ERROR,
3244 : (errcode(ERRCODE_CONNECTION_FAILURE),
3245 : errmsg("could not connect to publisher when attempting to drop replication slot \"%s\": %s",
3246 : slotname, err),
3247 : /* translator: %s is an SQL ALTER command */
3248 : errhint("Use %s to disable the subscription, and then use %s to disassociate it from the slot.",
3249 : "ALTER SUBSCRIPTION ... DISABLE",
3250 : "ALTER SUBSCRIPTION ... SET (slot_name = NONE)")));
3251 : }
3252 :
3253 : /*
3254 : * Check for duplicates in the given list of publications and error out if
3255 : * found one. Add publications to datums as text datums, if datums is not
3256 : * NULL.
3257 : */
3258 : static void
3259 234 : check_duplicates_in_publist(List *publist, Datum *datums)
3260 : {
3261 : ListCell *cell;
3262 234 : int j = 0;
3263 :
3264 533 : foreach(cell, publist)
3265 : {
3266 308 : char *name = strVal(lfirst(cell));
3267 : ListCell *pcell;
3268 :
3269 460 : foreach(pcell, publist)
3270 : {
3271 460 : char *pname = strVal(lfirst(pcell));
3272 :
3273 460 : if (pcell == cell)
3274 299 : break;
3275 :
3276 161 : if (strcmp(name, pname) == 0)
3277 9 : ereport(ERROR,
3278 : (errcode(ERRCODE_DUPLICATE_OBJECT),
3279 : errmsg("publication name \"%s\" used more than once",
3280 : pname)));
3281 : }
3282 :
3283 299 : if (datums)
3284 256 : datums[j++] = CStringGetTextDatum(name);
3285 : }
3286 225 : }
3287 :
3288 : /*
3289 : * Merge current subscription's publications and user-specified publications
3290 : * from ADD/DROP PUBLICATIONS.
3291 : *
3292 : * If addpub is true, we will add the list of publications into oldpublist.
3293 : * Otherwise, we will delete the list of publications from oldpublist. The
3294 : * returned list is a copy, oldpublist itself is not changed.
3295 : *
3296 : * subname is the subscription name, for error messages.
3297 : */
3298 : static List *
3299 27 : merge_publications(List *oldpublist, List *newpublist, bool addpub, const char *subname)
3300 : {
3301 : ListCell *lc;
3302 :
3303 27 : oldpublist = list_copy(oldpublist);
3304 :
3305 27 : check_duplicates_in_publist(newpublist, NULL);
3306 :
3307 46 : foreach(lc, newpublist)
3308 : {
3309 34 : char *name = strVal(lfirst(lc));
3310 : ListCell *lc2;
3311 34 : bool found = false;
3312 :
3313 67 : foreach(lc2, oldpublist)
3314 : {
3315 55 : char *pubname = strVal(lfirst(lc2));
3316 :
3317 55 : if (strcmp(name, pubname) == 0)
3318 : {
3319 22 : found = true;
3320 22 : if (addpub)
3321 6 : ereport(ERROR,
3322 : (errcode(ERRCODE_DUPLICATE_OBJECT),
3323 : errmsg("publication \"%s\" is already in subscription \"%s\"",
3324 : name, subname)));
3325 : else
3326 16 : oldpublist = foreach_delete_current(oldpublist, lc2);
3327 :
3328 16 : break;
3329 : }
3330 : }
3331 :
3332 28 : if (addpub && !found)
3333 9 : oldpublist = lappend(oldpublist, makeString(name));
3334 19 : else if (!addpub && !found)
3335 3 : ereport(ERROR,
3336 : (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
3337 : errmsg("publication \"%s\" is not in subscription \"%s\"",
3338 : name, subname)));
3339 : }
3340 :
3341 : /*
3342 : * XXX Probably no strong reason for this, but for now it's to make ALTER
3343 : * SUBSCRIPTION ... DROP PUBLICATION consistent with SET PUBLICATION.
3344 : */
3345 12 : if (!oldpublist)
3346 3 : ereport(ERROR,
3347 : (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
3348 : errmsg("cannot drop all the publications from a subscription")));
3349 :
3350 9 : return oldpublist;
3351 : }
3352 :
3353 : /*
3354 : * Extract the streaming mode value from a DefElem. This is like
3355 : * defGetBoolean() but also accepts the special value of "parallel".
3356 : */
3357 : char
3358 454 : defGetStreamingMode(DefElem *def)
3359 : {
3360 : /*
3361 : * If no parameter value given, assume "true" is meant.
3362 : */
3363 454 : if (!def->arg)
3364 0 : return LOGICALREP_STREAM_ON;
3365 :
3366 : /*
3367 : * Allow 0, 1, "false", "true", "off", "on" or "parallel".
3368 : */
3369 454 : switch (nodeTag(def->arg))
3370 : {
3371 0 : case T_Integer:
3372 0 : switch (intVal(def->arg))
3373 : {
3374 0 : case 0:
3375 0 : return LOGICALREP_STREAM_OFF;
3376 0 : case 1:
3377 0 : return LOGICALREP_STREAM_ON;
3378 0 : default:
3379 : /* otherwise, error out below */
3380 0 : break;
3381 : }
3382 0 : break;
3383 454 : default:
3384 : {
3385 454 : char *sval = defGetString(def);
3386 :
3387 : /*
3388 : * The set of strings accepted here should match up with the
3389 : * grammar's opt_boolean_or_string production.
3390 : */
3391 905 : if (pg_strcasecmp(sval, "false") == 0 ||
3392 451 : pg_strcasecmp(sval, "off") == 0)
3393 6 : return LOGICALREP_STREAM_OFF;
3394 887 : if (pg_strcasecmp(sval, "true") == 0 ||
3395 439 : pg_strcasecmp(sval, "on") == 0)
3396 45 : return LOGICALREP_STREAM_ON;
3397 403 : if (pg_strcasecmp(sval, "parallel") == 0)
3398 400 : return LOGICALREP_STREAM_PARALLEL;
3399 : }
3400 3 : break;
3401 : }
3402 :
3403 3 : ereport(ERROR,
3404 : (errcode(ERRCODE_SYNTAX_ERROR),
3405 : errmsg("%s requires a Boolean value or \"parallel\"",
3406 : def->defname)));
3407 : return LOGICALREP_STREAM_OFF; /* keep compiler quiet */
3408 : }
|
