Line data Source code
1 : /*-------------------------------------------------------------------------
2 : *
3 : * subscriptioncmds.c
4 : * subscription catalog manipulation functions
5 : *
6 : * Portions Copyright (c) 1996-2025, 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_subscription.h"
31 : #include "catalog/pg_subscription_rel.h"
32 : #include "catalog/pg_type.h"
33 : #include "commands/defrem.h"
34 : #include "commands/event_trigger.h"
35 : #include "commands/subscriptioncmds.h"
36 : #include "executor/executor.h"
37 : #include "miscadmin.h"
38 : #include "nodes/makefuncs.h"
39 : #include "pgstat.h"
40 : #include "replication/logicallauncher.h"
41 : #include "replication/logicalworker.h"
42 : #include "replication/origin.h"
43 : #include "replication/slot.h"
44 : #include "replication/walreceiver.h"
45 : #include "replication/walsender.h"
46 : #include "replication/worker_internal.h"
47 : #include "storage/lmgr.h"
48 : #include "utils/acl.h"
49 : #include "utils/builtins.h"
50 : #include "utils/guc.h"
51 : #include "utils/lsyscache.h"
52 : #include "utils/memutils.h"
53 : #include "utils/pg_lsn.h"
54 : #include "utils/syscache.h"
55 :
56 : /*
57 : * Options that can be specified by the user in CREATE/ALTER SUBSCRIPTION
58 : * command.
59 : */
60 : #define SUBOPT_CONNECT 0x00000001
61 : #define SUBOPT_ENABLED 0x00000002
62 : #define SUBOPT_CREATE_SLOT 0x00000004
63 : #define SUBOPT_SLOT_NAME 0x00000008
64 : #define SUBOPT_COPY_DATA 0x00000010
65 : #define SUBOPT_SYNCHRONOUS_COMMIT 0x00000020
66 : #define SUBOPT_REFRESH 0x00000040
67 : #define SUBOPT_BINARY 0x00000080
68 : #define SUBOPT_STREAMING 0x00000100
69 : #define SUBOPT_TWOPHASE_COMMIT 0x00000200
70 : #define SUBOPT_DISABLE_ON_ERR 0x00000400
71 : #define SUBOPT_PASSWORD_REQUIRED 0x00000800
72 : #define SUBOPT_RUN_AS_OWNER 0x00001000
73 : #define SUBOPT_FAILOVER 0x00002000
74 : #define SUBOPT_RETAIN_DEAD_TUPLES 0x00004000
75 : #define SUBOPT_MAX_RETENTION_DURATION 0x00008000
76 : #define SUBOPT_LSN 0x00010000
77 : #define SUBOPT_ORIGIN 0x00020000
78 :
79 : /* check if the 'val' has 'bits' set */
80 : #define IsSet(val, bits) (((val) & (bits)) == (bits))
81 :
82 : /*
83 : * Structure to hold a bitmap representing the user-provided CREATE/ALTER
84 : * SUBSCRIPTION command options and the parsed/default values of each of them.
85 : */
86 : typedef struct SubOpts
87 : {
88 : bits32 specified_opts;
89 : char *slot_name;
90 : char *synchronous_commit;
91 : bool connect;
92 : bool enabled;
93 : bool create_slot;
94 : bool copy_data;
95 : bool refresh;
96 : bool binary;
97 : char streaming;
98 : bool twophase;
99 : bool disableonerr;
100 : bool passwordrequired;
101 : bool runasowner;
102 : bool failover;
103 : bool retaindeadtuples;
104 : int32 maxretention;
105 : char *origin;
106 : XLogRecPtr lsn;
107 : } SubOpts;
108 :
109 : /*
110 : * PublicationRelKind represents a relation included in a publication.
111 : * It stores the schema-qualified relation name (rv) and its kind (relkind).
112 : */
113 : typedef struct PublicationRelKind
114 : {
115 : RangeVar *rv;
116 : char relkind;
117 : } PublicationRelKind;
118 :
119 : static List *fetch_relation_list(WalReceiverConn *wrconn, List *publications);
120 : static void check_publications_origin_tables(WalReceiverConn *wrconn,
121 : List *publications, bool copydata,
122 : bool retain_dead_tuples,
123 : char *origin,
124 : Oid *subrel_local_oids,
125 : int subrel_count, char *subname);
126 : static void check_publications_origin_sequences(WalReceiverConn *wrconn,
127 : List *publications,
128 : bool copydata, char *origin,
129 : Oid *subrel_local_oids,
130 : int subrel_count,
131 : char *subname);
132 : static void check_pub_dead_tuple_retention(WalReceiverConn *wrconn);
133 : static void check_duplicates_in_publist(List *publist, Datum *datums);
134 : static List *merge_publications(List *oldpublist, List *newpublist, bool addpub, const char *subname);
135 : static void ReportSlotConnectionError(List *rstates, Oid subid, char *slotname, char *err);
136 : static void CheckAlterSubOption(Subscription *sub, const char *option,
137 : bool slot_needs_update, bool isTopLevel);
138 :
139 :
140 : /*
141 : * Common option parsing function for CREATE and ALTER SUBSCRIPTION commands.
142 : *
143 : * Since not all options can be specified in both commands, this function
144 : * will report an error if mutually exclusive options are specified.
145 : */
146 : static void
147 976 : parse_subscription_options(ParseState *pstate, List *stmt_options,
148 : bits32 supported_opts, SubOpts *opts)
149 : {
150 : ListCell *lc;
151 :
152 : /* Start out with cleared opts. */
153 976 : memset(opts, 0, sizeof(SubOpts));
154 :
155 : /* caller must expect some option */
156 : Assert(supported_opts != 0);
157 :
158 : /* If connect option is supported, these others also need to be. */
159 : Assert(!IsSet(supported_opts, SUBOPT_CONNECT) ||
160 : IsSet(supported_opts, SUBOPT_ENABLED | SUBOPT_CREATE_SLOT |
161 : SUBOPT_COPY_DATA));
162 :
163 : /* Set default values for the supported options. */
164 976 : if (IsSet(supported_opts, SUBOPT_CONNECT))
165 482 : opts->connect = true;
166 976 : if (IsSet(supported_opts, SUBOPT_ENABLED))
167 586 : opts->enabled = true;
168 976 : if (IsSet(supported_opts, SUBOPT_CREATE_SLOT))
169 482 : opts->create_slot = true;
170 976 : if (IsSet(supported_opts, SUBOPT_COPY_DATA))
171 630 : opts->copy_data = true;
172 976 : if (IsSet(supported_opts, SUBOPT_REFRESH))
173 86 : opts->refresh = true;
174 976 : if (IsSet(supported_opts, SUBOPT_BINARY))
175 700 : opts->binary = false;
176 976 : if (IsSet(supported_opts, SUBOPT_STREAMING))
177 700 : opts->streaming = LOGICALREP_STREAM_PARALLEL;
178 976 : if (IsSet(supported_opts, SUBOPT_TWOPHASE_COMMIT))
179 700 : opts->twophase = false;
180 976 : if (IsSet(supported_opts, SUBOPT_DISABLE_ON_ERR))
181 700 : opts->disableonerr = false;
182 976 : if (IsSet(supported_opts, SUBOPT_PASSWORD_REQUIRED))
183 700 : opts->passwordrequired = true;
184 976 : if (IsSet(supported_opts, SUBOPT_RUN_AS_OWNER))
185 700 : opts->runasowner = false;
186 976 : if (IsSet(supported_opts, SUBOPT_FAILOVER))
187 700 : opts->failover = false;
188 976 : if (IsSet(supported_opts, SUBOPT_RETAIN_DEAD_TUPLES))
189 700 : opts->retaindeadtuples = false;
190 976 : if (IsSet(supported_opts, SUBOPT_MAX_RETENTION_DURATION))
191 700 : opts->maxretention = 0;
192 976 : if (IsSet(supported_opts, SUBOPT_ORIGIN))
193 700 : opts->origin = pstrdup(LOGICALREP_ORIGIN_ANY);
194 :
195 : /* Parse options */
196 1928 : foreach(lc, stmt_options)
197 : {
198 1018 : DefElem *defel = (DefElem *) lfirst(lc);
199 :
200 1018 : if (IsSet(supported_opts, SUBOPT_CONNECT) &&
201 592 : strcmp(defel->defname, "connect") == 0)
202 : {
203 190 : if (IsSet(opts->specified_opts, SUBOPT_CONNECT))
204 0 : errorConflictingDefElem(defel, pstate);
205 :
206 190 : opts->specified_opts |= SUBOPT_CONNECT;
207 190 : opts->connect = defGetBoolean(defel);
208 : }
209 828 : else if (IsSet(supported_opts, SUBOPT_ENABLED) &&
210 506 : strcmp(defel->defname, "enabled") == 0)
211 : {
212 142 : if (IsSet(opts->specified_opts, SUBOPT_ENABLED))
213 0 : errorConflictingDefElem(defel, pstate);
214 :
215 142 : opts->specified_opts |= SUBOPT_ENABLED;
216 142 : opts->enabled = defGetBoolean(defel);
217 : }
218 686 : else if (IsSet(supported_opts, SUBOPT_CREATE_SLOT) &&
219 364 : strcmp(defel->defname, "create_slot") == 0)
220 : {
221 40 : if (IsSet(opts->specified_opts, SUBOPT_CREATE_SLOT))
222 0 : errorConflictingDefElem(defel, pstate);
223 :
224 40 : opts->specified_opts |= SUBOPT_CREATE_SLOT;
225 40 : opts->create_slot = defGetBoolean(defel);
226 : }
227 646 : else if (IsSet(supported_opts, SUBOPT_SLOT_NAME) &&
228 546 : strcmp(defel->defname, "slot_name") == 0)
229 : {
230 156 : if (IsSet(opts->specified_opts, SUBOPT_SLOT_NAME))
231 0 : errorConflictingDefElem(defel, pstate);
232 :
233 156 : opts->specified_opts |= SUBOPT_SLOT_NAME;
234 156 : opts->slot_name = defGetString(defel);
235 :
236 : /* Setting slot_name = NONE is treated as no slot name. */
237 156 : if (strcmp(opts->slot_name, "none") == 0)
238 122 : opts->slot_name = NULL;
239 : else
240 34 : ReplicationSlotValidateName(opts->slot_name, false, ERROR);
241 : }
242 490 : else if (IsSet(supported_opts, SUBOPT_COPY_DATA) &&
243 322 : strcmp(defel->defname, "copy_data") == 0)
244 : {
245 58 : if (IsSet(opts->specified_opts, SUBOPT_COPY_DATA))
246 0 : errorConflictingDefElem(defel, pstate);
247 :
248 58 : opts->specified_opts |= SUBOPT_COPY_DATA;
249 58 : opts->copy_data = defGetBoolean(defel);
250 : }
251 432 : else if (IsSet(supported_opts, SUBOPT_SYNCHRONOUS_COMMIT) &&
252 342 : strcmp(defel->defname, "synchronous_commit") == 0)
253 : {
254 12 : if (IsSet(opts->specified_opts, SUBOPT_SYNCHRONOUS_COMMIT))
255 0 : errorConflictingDefElem(defel, pstate);
256 :
257 12 : opts->specified_opts |= SUBOPT_SYNCHRONOUS_COMMIT;
258 12 : opts->synchronous_commit = defGetString(defel);
259 :
260 : /* Test if the given value is valid for synchronous_commit GUC. */
261 12 : (void) set_config_option("synchronous_commit", opts->synchronous_commit,
262 : PGC_BACKEND, PGC_S_TEST, GUC_ACTION_SET,
263 : false, 0, false);
264 : }
265 420 : else if (IsSet(supported_opts, SUBOPT_REFRESH) &&
266 66 : strcmp(defel->defname, "refresh") == 0)
267 : {
268 66 : if (IsSet(opts->specified_opts, SUBOPT_REFRESH))
269 0 : errorConflictingDefElem(defel, pstate);
270 :
271 66 : opts->specified_opts |= SUBOPT_REFRESH;
272 66 : opts->refresh = defGetBoolean(defel);
273 : }
274 354 : else if (IsSet(supported_opts, SUBOPT_BINARY) &&
275 330 : strcmp(defel->defname, "binary") == 0)
276 : {
277 32 : if (IsSet(opts->specified_opts, SUBOPT_BINARY))
278 0 : errorConflictingDefElem(defel, pstate);
279 :
280 32 : opts->specified_opts |= SUBOPT_BINARY;
281 32 : opts->binary = defGetBoolean(defel);
282 : }
283 322 : else if (IsSet(supported_opts, SUBOPT_STREAMING) &&
284 298 : strcmp(defel->defname, "streaming") == 0)
285 : {
286 74 : if (IsSet(opts->specified_opts, SUBOPT_STREAMING))
287 0 : errorConflictingDefElem(defel, pstate);
288 :
289 74 : opts->specified_opts |= SUBOPT_STREAMING;
290 74 : opts->streaming = defGetStreamingMode(defel);
291 : }
292 248 : else if (IsSet(supported_opts, SUBOPT_TWOPHASE_COMMIT) &&
293 224 : strcmp(defel->defname, "two_phase") == 0)
294 : {
295 42 : if (IsSet(opts->specified_opts, SUBOPT_TWOPHASE_COMMIT))
296 0 : errorConflictingDefElem(defel, pstate);
297 :
298 42 : opts->specified_opts |= SUBOPT_TWOPHASE_COMMIT;
299 42 : opts->twophase = defGetBoolean(defel);
300 : }
301 206 : else if (IsSet(supported_opts, SUBOPT_DISABLE_ON_ERR) &&
302 182 : strcmp(defel->defname, "disable_on_error") == 0)
303 : {
304 20 : if (IsSet(opts->specified_opts, SUBOPT_DISABLE_ON_ERR))
305 0 : errorConflictingDefElem(defel, pstate);
306 :
307 20 : opts->specified_opts |= SUBOPT_DISABLE_ON_ERR;
308 20 : opts->disableonerr = defGetBoolean(defel);
309 : }
310 186 : else if (IsSet(supported_opts, SUBOPT_PASSWORD_REQUIRED) &&
311 162 : strcmp(defel->defname, "password_required") == 0)
312 : {
313 24 : if (IsSet(opts->specified_opts, SUBOPT_PASSWORD_REQUIRED))
314 0 : errorConflictingDefElem(defel, pstate);
315 :
316 24 : opts->specified_opts |= SUBOPT_PASSWORD_REQUIRED;
317 24 : opts->passwordrequired = defGetBoolean(defel);
318 : }
319 162 : else if (IsSet(supported_opts, SUBOPT_RUN_AS_OWNER) &&
320 138 : strcmp(defel->defname, "run_as_owner") == 0)
321 : {
322 18 : if (IsSet(opts->specified_opts, SUBOPT_RUN_AS_OWNER))
323 0 : errorConflictingDefElem(defel, pstate);
324 :
325 18 : opts->specified_opts |= SUBOPT_RUN_AS_OWNER;
326 18 : opts->runasowner = defGetBoolean(defel);
327 : }
328 144 : else if (IsSet(supported_opts, SUBOPT_FAILOVER) &&
329 120 : strcmp(defel->defname, "failover") == 0)
330 : {
331 26 : if (IsSet(opts->specified_opts, SUBOPT_FAILOVER))
332 0 : errorConflictingDefElem(defel, pstate);
333 :
334 26 : opts->specified_opts |= SUBOPT_FAILOVER;
335 26 : opts->failover = defGetBoolean(defel);
336 : }
337 118 : else if (IsSet(supported_opts, SUBOPT_RETAIN_DEAD_TUPLES) &&
338 94 : strcmp(defel->defname, "retain_dead_tuples") == 0)
339 : {
340 24 : if (IsSet(opts->specified_opts, SUBOPT_RETAIN_DEAD_TUPLES))
341 0 : errorConflictingDefElem(defel, pstate);
342 :
343 24 : opts->specified_opts |= SUBOPT_RETAIN_DEAD_TUPLES;
344 24 : opts->retaindeadtuples = defGetBoolean(defel);
345 : }
346 94 : else if (IsSet(supported_opts, SUBOPT_MAX_RETENTION_DURATION) &&
347 70 : strcmp(defel->defname, "max_retention_duration") == 0)
348 : {
349 22 : if (IsSet(opts->specified_opts, SUBOPT_MAX_RETENTION_DURATION))
350 0 : errorConflictingDefElem(defel, pstate);
351 :
352 22 : opts->specified_opts |= SUBOPT_MAX_RETENTION_DURATION;
353 22 : opts->maxretention = defGetInt32(defel);
354 : }
355 72 : else if (IsSet(supported_opts, SUBOPT_ORIGIN) &&
356 48 : strcmp(defel->defname, "origin") == 0)
357 : {
358 42 : if (IsSet(opts->specified_opts, SUBOPT_ORIGIN))
359 0 : errorConflictingDefElem(defel, pstate);
360 :
361 42 : opts->specified_opts |= SUBOPT_ORIGIN;
362 42 : pfree(opts->origin);
363 :
364 : /*
365 : * Even though the "origin" parameter allows only "none" and "any"
366 : * values, it is implemented as a string type so that the
367 : * parameter can be extended in future versions to support
368 : * filtering using origin names specified by the user.
369 : */
370 42 : opts->origin = defGetString(defel);
371 :
372 58 : if ((pg_strcasecmp(opts->origin, LOGICALREP_ORIGIN_NONE) != 0) &&
373 16 : (pg_strcasecmp(opts->origin, LOGICALREP_ORIGIN_ANY) != 0))
374 6 : ereport(ERROR,
375 : errcode(ERRCODE_INVALID_PARAMETER_VALUE),
376 : errmsg("unrecognized origin value: \"%s\"", opts->origin));
377 : }
378 30 : else if (IsSet(supported_opts, SUBOPT_LSN) &&
379 24 : strcmp(defel->defname, "lsn") == 0)
380 18 : {
381 24 : char *lsn_str = defGetString(defel);
382 : XLogRecPtr lsn;
383 :
384 24 : if (IsSet(opts->specified_opts, SUBOPT_LSN))
385 0 : errorConflictingDefElem(defel, pstate);
386 :
387 : /* Setting lsn = NONE is treated as resetting LSN */
388 24 : if (strcmp(lsn_str, "none") == 0)
389 6 : lsn = InvalidXLogRecPtr;
390 : else
391 : {
392 : /* Parse the argument as LSN */
393 18 : lsn = DatumGetLSN(DirectFunctionCall1(pg_lsn_in,
394 : CStringGetDatum(lsn_str)));
395 :
396 18 : if (!XLogRecPtrIsValid(lsn))
397 6 : ereport(ERROR,
398 : (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
399 : errmsg("invalid WAL location (LSN): %s", lsn_str)));
400 : }
401 :
402 18 : opts->specified_opts |= SUBOPT_LSN;
403 18 : opts->lsn = lsn;
404 : }
405 : else
406 6 : ereport(ERROR,
407 : (errcode(ERRCODE_SYNTAX_ERROR),
408 : errmsg("unrecognized subscription parameter: \"%s\"", defel->defname)));
409 : }
410 :
411 : /*
412 : * We've been explicitly asked to not connect, that requires some
413 : * additional processing.
414 : */
415 910 : if (!opts->connect && IsSet(supported_opts, SUBOPT_CONNECT))
416 : {
417 : /* Check for incompatible options from the user. */
418 148 : if (opts->enabled &&
419 148 : IsSet(opts->specified_opts, SUBOPT_ENABLED))
420 6 : ereport(ERROR,
421 : (errcode(ERRCODE_SYNTAX_ERROR),
422 : /*- translator: both %s are strings of the form "option = value" */
423 : errmsg("%s and %s are mutually exclusive options",
424 : "connect = false", "enabled = true")));
425 :
426 142 : if (opts->create_slot &&
427 136 : IsSet(opts->specified_opts, SUBOPT_CREATE_SLOT))
428 6 : ereport(ERROR,
429 : (errcode(ERRCODE_SYNTAX_ERROR),
430 : errmsg("%s and %s are mutually exclusive options",
431 : "connect = false", "create_slot = true")));
432 :
433 136 : if (opts->copy_data &&
434 130 : IsSet(opts->specified_opts, SUBOPT_COPY_DATA))
435 6 : ereport(ERROR,
436 : (errcode(ERRCODE_SYNTAX_ERROR),
437 : errmsg("%s and %s are mutually exclusive options",
438 : "connect = false", "copy_data = true")));
439 :
440 : /* Change the defaults of other options. */
441 130 : opts->enabled = false;
442 130 : opts->create_slot = false;
443 130 : opts->copy_data = false;
444 : }
445 :
446 : /*
447 : * Do additional checking for disallowed combination when slot_name = NONE
448 : * was used.
449 : */
450 892 : if (!opts->slot_name &&
451 864 : IsSet(opts->specified_opts, SUBOPT_SLOT_NAME))
452 : {
453 116 : if (opts->enabled)
454 : {
455 18 : if (IsSet(opts->specified_opts, SUBOPT_ENABLED))
456 6 : ereport(ERROR,
457 : (errcode(ERRCODE_SYNTAX_ERROR),
458 : /*- translator: both %s are strings of the form "option = value" */
459 : errmsg("%s and %s are mutually exclusive options",
460 : "slot_name = NONE", "enabled = true")));
461 : else
462 12 : ereport(ERROR,
463 : (errcode(ERRCODE_SYNTAX_ERROR),
464 : /*- translator: both %s are strings of the form "option = value" */
465 : errmsg("subscription with %s must also set %s",
466 : "slot_name = NONE", "enabled = false")));
467 : }
468 :
469 98 : if (opts->create_slot)
470 : {
471 12 : if (IsSet(opts->specified_opts, SUBOPT_CREATE_SLOT))
472 6 : ereport(ERROR,
473 : (errcode(ERRCODE_SYNTAX_ERROR),
474 : /*- translator: both %s are strings of the form "option = value" */
475 : errmsg("%s and %s are mutually exclusive options",
476 : "slot_name = NONE", "create_slot = true")));
477 : else
478 6 : ereport(ERROR,
479 : (errcode(ERRCODE_SYNTAX_ERROR),
480 : /*- translator: both %s are strings of the form "option = value" */
481 : errmsg("subscription with %s must also set %s",
482 : "slot_name = NONE", "create_slot = false")));
483 : }
484 : }
485 862 : }
486 :
487 : /*
488 : * Check that the specified publications are present on the publisher.
489 : */
490 : static void
491 256 : check_publications(WalReceiverConn *wrconn, List *publications)
492 : {
493 : WalRcvExecResult *res;
494 : StringInfoData cmd;
495 : TupleTableSlot *slot;
496 256 : List *publicationsCopy = NIL;
497 256 : Oid tableRow[1] = {TEXTOID};
498 :
499 256 : initStringInfo(&cmd);
500 256 : appendStringInfoString(&cmd, "SELECT t.pubname FROM\n"
501 : " pg_catalog.pg_publication t WHERE\n"
502 : " t.pubname IN (");
503 256 : GetPublicationsStr(publications, &cmd, true);
504 256 : appendStringInfoChar(&cmd, ')');
505 :
506 256 : res = walrcv_exec(wrconn, cmd.data, 1, tableRow);
507 256 : pfree(cmd.data);
508 :
509 256 : if (res->status != WALRCV_OK_TUPLES)
510 0 : ereport(ERROR,
511 : errmsg("could not receive list of publications from the publisher: %s",
512 : res->err));
513 :
514 256 : publicationsCopy = list_copy(publications);
515 :
516 : /* Process publication(s). */
517 256 : slot = MakeSingleTupleTableSlot(res->tupledesc, &TTSOpsMinimalTuple);
518 568 : while (tuplestore_gettupleslot(res->tuplestore, true, false, slot))
519 : {
520 : char *pubname;
521 : bool isnull;
522 :
523 312 : pubname = TextDatumGetCString(slot_getattr(slot, 1, &isnull));
524 : Assert(!isnull);
525 :
526 : /* Delete the publication present in publisher from the list. */
527 312 : publicationsCopy = list_delete(publicationsCopy, makeString(pubname));
528 312 : ExecClearTuple(slot);
529 : }
530 :
531 256 : ExecDropSingleTupleTableSlot(slot);
532 :
533 256 : walrcv_clear_result(res);
534 :
535 256 : if (list_length(publicationsCopy))
536 : {
537 : /* Prepare the list of non-existent publication(s) for error message. */
538 : StringInfoData pubnames;
539 :
540 8 : initStringInfo(&pubnames);
541 :
542 8 : GetPublicationsStr(publicationsCopy, &pubnames, false);
543 8 : ereport(WARNING,
544 : errcode(ERRCODE_UNDEFINED_OBJECT),
545 : errmsg_plural("publication %s does not exist on the publisher",
546 : "publications %s do not exist on the publisher",
547 : list_length(publicationsCopy),
548 : pubnames.data));
549 : }
550 256 : }
551 :
552 : /*
553 : * Auxiliary function to build a text array out of a list of String nodes.
554 : */
555 : static Datum
556 394 : publicationListToArray(List *publist)
557 : {
558 : ArrayType *arr;
559 : Datum *datums;
560 : MemoryContext memcxt;
561 : MemoryContext oldcxt;
562 :
563 : /* Create memory context for temporary allocations. */
564 394 : memcxt = AllocSetContextCreate(CurrentMemoryContext,
565 : "publicationListToArray to array",
566 : ALLOCSET_DEFAULT_SIZES);
567 394 : oldcxt = MemoryContextSwitchTo(memcxt);
568 :
569 394 : datums = (Datum *) palloc(sizeof(Datum) * list_length(publist));
570 :
571 394 : check_duplicates_in_publist(publist, datums);
572 :
573 388 : MemoryContextSwitchTo(oldcxt);
574 :
575 388 : arr = construct_array_builtin(datums, list_length(publist), TEXTOID);
576 :
577 388 : MemoryContextDelete(memcxt);
578 :
579 388 : return PointerGetDatum(arr);
580 : }
581 :
582 : /*
583 : * Create new subscription.
584 : */
585 : ObjectAddress
586 482 : CreateSubscription(ParseState *pstate, CreateSubscriptionStmt *stmt,
587 : bool isTopLevel)
588 : {
589 : Relation rel;
590 : ObjectAddress myself;
591 : Oid subid;
592 : bool nulls[Natts_pg_subscription];
593 : Datum values[Natts_pg_subscription];
594 482 : Oid owner = GetUserId();
595 : HeapTuple tup;
596 : char *conninfo;
597 : char originname[NAMEDATALEN];
598 : List *publications;
599 : bits32 supported_opts;
600 482 : SubOpts opts = {0};
601 : AclResult aclresult;
602 :
603 : /*
604 : * Parse and check options.
605 : *
606 : * Connection and publication should not be specified here.
607 : */
608 482 : supported_opts = (SUBOPT_CONNECT | SUBOPT_ENABLED | SUBOPT_CREATE_SLOT |
609 : SUBOPT_SLOT_NAME | SUBOPT_COPY_DATA |
610 : SUBOPT_SYNCHRONOUS_COMMIT | SUBOPT_BINARY |
611 : SUBOPT_STREAMING | SUBOPT_TWOPHASE_COMMIT |
612 : SUBOPT_DISABLE_ON_ERR | SUBOPT_PASSWORD_REQUIRED |
613 : SUBOPT_RUN_AS_OWNER | SUBOPT_FAILOVER |
614 : SUBOPT_RETAIN_DEAD_TUPLES |
615 : SUBOPT_MAX_RETENTION_DURATION | SUBOPT_ORIGIN);
616 482 : parse_subscription_options(pstate, stmt->options, supported_opts, &opts);
617 :
618 : /*
619 : * Since creating a replication slot is not transactional, rolling back
620 : * the transaction leaves the created replication slot. So we cannot run
621 : * CREATE SUBSCRIPTION inside a transaction block if creating a
622 : * replication slot.
623 : */
624 392 : if (opts.create_slot)
625 252 : PreventInTransactionBlock(isTopLevel, "CREATE SUBSCRIPTION ... WITH (create_slot = true)");
626 :
627 : /*
628 : * We don't want to allow unprivileged users to be able to trigger
629 : * attempts to access arbitrary network destinations, so require the user
630 : * to have been specifically authorized to create subscriptions.
631 : */
632 386 : if (!has_privs_of_role(owner, ROLE_PG_CREATE_SUBSCRIPTION))
633 6 : ereport(ERROR,
634 : (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
635 : errmsg("permission denied to create subscription"),
636 : errdetail("Only roles with privileges of the \"%s\" role may create subscriptions.",
637 : "pg_create_subscription")));
638 :
639 : /*
640 : * Since a subscription is a database object, we also check for CREATE
641 : * permission on the database.
642 : */
643 380 : aclresult = object_aclcheck(DatabaseRelationId, MyDatabaseId,
644 : owner, ACL_CREATE);
645 380 : if (aclresult != ACLCHECK_OK)
646 12 : aclcheck_error(aclresult, OBJECT_DATABASE,
647 6 : get_database_name(MyDatabaseId));
648 :
649 : /*
650 : * Non-superusers are required to set a password for authentication, and
651 : * that password must be used by the target server, but the superuser can
652 : * exempt a subscription from this requirement.
653 : */
654 374 : if (!opts.passwordrequired && !superuser_arg(owner))
655 6 : ereport(ERROR,
656 : (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
657 : errmsg("password_required=false is superuser-only"),
658 : errhint("Subscriptions with the password_required option set to false may only be created or modified by the superuser.")));
659 :
660 : /*
661 : * If built with appropriate switch, whine when regression-testing
662 : * conventions for subscription names are violated.
663 : */
664 : #ifdef ENFORCE_REGRESSION_TEST_NAME_RESTRICTIONS
665 : if (strncmp(stmt->subname, "regress_", 8) != 0)
666 : elog(WARNING, "subscriptions created by regression test cases should have names starting with \"regress_\"");
667 : #endif
668 :
669 368 : rel = table_open(SubscriptionRelationId, RowExclusiveLock);
670 :
671 : /* Check if name is used */
672 368 : subid = GetSysCacheOid2(SUBSCRIPTIONNAME, Anum_pg_subscription_oid,
673 : ObjectIdGetDatum(MyDatabaseId), CStringGetDatum(stmt->subname));
674 368 : if (OidIsValid(subid))
675 : {
676 6 : ereport(ERROR,
677 : (errcode(ERRCODE_DUPLICATE_OBJECT),
678 : errmsg("subscription \"%s\" already exists",
679 : stmt->subname)));
680 : }
681 :
682 : /*
683 : * Ensure that system configuration parameters are set appropriately to
684 : * support retain_dead_tuples and max_retention_duration.
685 : */
686 362 : CheckSubDeadTupleRetention(true, !opts.enabled, WARNING,
687 362 : opts.retaindeadtuples, opts.retaindeadtuples,
688 362 : (opts.maxretention > 0));
689 :
690 362 : if (!IsSet(opts.specified_opts, SUBOPT_SLOT_NAME) &&
691 320 : opts.slot_name == NULL)
692 320 : opts.slot_name = stmt->subname;
693 :
694 : /* The default for synchronous_commit of subscriptions is off. */
695 362 : if (opts.synchronous_commit == NULL)
696 362 : opts.synchronous_commit = "off";
697 :
698 362 : conninfo = stmt->conninfo;
699 362 : publications = stmt->publication;
700 :
701 : /* Load the library providing us libpq calls. */
702 362 : load_file("libpqwalreceiver", false);
703 :
704 : /* Check the connection info string. */
705 362 : walrcv_check_conninfo(conninfo, opts.passwordrequired && !superuser());
706 :
707 : /* Everything ok, form a new tuple. */
708 344 : memset(values, 0, sizeof(values));
709 344 : memset(nulls, false, sizeof(nulls));
710 :
711 344 : subid = GetNewOidWithIndex(rel, SubscriptionObjectIndexId,
712 : Anum_pg_subscription_oid);
713 344 : values[Anum_pg_subscription_oid - 1] = ObjectIdGetDatum(subid);
714 344 : values[Anum_pg_subscription_subdbid - 1] = ObjectIdGetDatum(MyDatabaseId);
715 344 : values[Anum_pg_subscription_subskiplsn - 1] = LSNGetDatum(InvalidXLogRecPtr);
716 344 : values[Anum_pg_subscription_subname - 1] =
717 344 : DirectFunctionCall1(namein, CStringGetDatum(stmt->subname));
718 344 : values[Anum_pg_subscription_subowner - 1] = ObjectIdGetDatum(owner);
719 344 : values[Anum_pg_subscription_subenabled - 1] = BoolGetDatum(opts.enabled);
720 344 : values[Anum_pg_subscription_subbinary - 1] = BoolGetDatum(opts.binary);
721 344 : values[Anum_pg_subscription_substream - 1] = CharGetDatum(opts.streaming);
722 344 : values[Anum_pg_subscription_subtwophasestate - 1] =
723 344 : CharGetDatum(opts.twophase ?
724 : LOGICALREP_TWOPHASE_STATE_PENDING :
725 : LOGICALREP_TWOPHASE_STATE_DISABLED);
726 344 : values[Anum_pg_subscription_subdisableonerr - 1] = BoolGetDatum(opts.disableonerr);
727 344 : values[Anum_pg_subscription_subpasswordrequired - 1] = BoolGetDatum(opts.passwordrequired);
728 344 : values[Anum_pg_subscription_subrunasowner - 1] = BoolGetDatum(opts.runasowner);
729 344 : values[Anum_pg_subscription_subfailover - 1] = BoolGetDatum(opts.failover);
730 344 : values[Anum_pg_subscription_subretaindeadtuples - 1] =
731 344 : BoolGetDatum(opts.retaindeadtuples);
732 344 : values[Anum_pg_subscription_submaxretention - 1] =
733 344 : Int32GetDatum(opts.maxretention);
734 344 : values[Anum_pg_subscription_subretentionactive - 1] =
735 344 : Int32GetDatum(opts.retaindeadtuples);
736 344 : values[Anum_pg_subscription_subconninfo - 1] =
737 344 : CStringGetTextDatum(conninfo);
738 344 : if (opts.slot_name)
739 324 : values[Anum_pg_subscription_subslotname - 1] =
740 324 : DirectFunctionCall1(namein, CStringGetDatum(opts.slot_name));
741 : else
742 20 : nulls[Anum_pg_subscription_subslotname - 1] = true;
743 344 : values[Anum_pg_subscription_subsynccommit - 1] =
744 344 : CStringGetTextDatum(opts.synchronous_commit);
745 338 : values[Anum_pg_subscription_subpublications - 1] =
746 344 : publicationListToArray(publications);
747 338 : values[Anum_pg_subscription_suborigin - 1] =
748 338 : CStringGetTextDatum(opts.origin);
749 :
750 338 : tup = heap_form_tuple(RelationGetDescr(rel), values, nulls);
751 :
752 : /* Insert tuple into catalog. */
753 338 : CatalogTupleInsert(rel, tup);
754 338 : heap_freetuple(tup);
755 :
756 338 : recordDependencyOnOwner(SubscriptionRelationId, subid, owner);
757 :
758 : /*
759 : * A replication origin is currently created for all subscriptions,
760 : * including those that only contain sequences or are otherwise empty.
761 : *
762 : * XXX: While this is technically unnecessary, optimizing it would require
763 : * additional logic to skip origin creation during DDL operations and
764 : * apply workers initialization, and to handle origin creation dynamically
765 : * when tables are added to the subscription. It is not clear whether
766 : * preventing creation of origins is worth additional complexity.
767 : */
768 338 : ReplicationOriginNameForLogicalRep(subid, InvalidOid, originname, sizeof(originname));
769 338 : replorigin_create(originname);
770 :
771 : /*
772 : * Connect to remote side to execute requested commands and fetch table
773 : * and sequence info.
774 : */
775 338 : if (opts.connect)
776 : {
777 : char *err;
778 : WalReceiverConn *wrconn;
779 : bool must_use_password;
780 :
781 : /* Try to connect to the publisher. */
782 244 : must_use_password = !superuser_arg(owner) && opts.passwordrequired;
783 244 : wrconn = walrcv_connect(conninfo, true, true, must_use_password,
784 : stmt->subname, &err);
785 244 : if (!wrconn)
786 6 : ereport(ERROR,
787 : (errcode(ERRCODE_CONNECTION_FAILURE),
788 : errmsg("subscription \"%s\" could not connect to the publisher: %s",
789 : stmt->subname, err)));
790 :
791 238 : PG_TRY();
792 : {
793 238 : bool has_tables = false;
794 : List *pubrels;
795 : char relation_state;
796 :
797 238 : check_publications(wrconn, publications);
798 238 : check_publications_origin_tables(wrconn, publications,
799 238 : opts.copy_data,
800 238 : opts.retaindeadtuples, opts.origin,
801 : NULL, 0, stmt->subname);
802 238 : check_publications_origin_sequences(wrconn, publications,
803 238 : opts.copy_data, opts.origin,
804 : NULL, 0, stmt->subname);
805 :
806 238 : if (opts.retaindeadtuples)
807 6 : check_pub_dead_tuple_retention(wrconn);
808 :
809 : /*
810 : * Set sync state based on if we were asked to do data copy or
811 : * not.
812 : */
813 238 : relation_state = opts.copy_data ? SUBREL_STATE_INIT : SUBREL_STATE_READY;
814 :
815 : /*
816 : * Build local relation status info. Relations are for both tables
817 : * and sequences from the publisher.
818 : */
819 238 : pubrels = fetch_relation_list(wrconn, publications);
820 :
821 842 : foreach_ptr(PublicationRelKind, pubrelinfo, pubrels)
822 : {
823 : Oid relid;
824 : char relkind;
825 370 : RangeVar *rv = pubrelinfo->rv;
826 :
827 370 : relid = RangeVarGetRelid(rv, AccessShareLock, false);
828 370 : relkind = get_rel_relkind(relid);
829 :
830 : /* Check for supported relkind. */
831 370 : CheckSubscriptionRelkind(relkind, pubrelinfo->relkind,
832 370 : rv->schemaname, rv->relname);
833 370 : has_tables |= (relkind != RELKIND_SEQUENCE);
834 370 : AddSubscriptionRelState(subid, relid, relation_state,
835 : InvalidXLogRecPtr, true);
836 : }
837 :
838 : /*
839 : * If requested, create permanent slot for the subscription. We
840 : * won't use the initial snapshot for anything, so no need to
841 : * export it.
842 : *
843 : * XXX: Similar to origins, it is not clear whether preventing the
844 : * slot creation for empty and sequence-only subscriptions is
845 : * worth additional complexity.
846 : */
847 236 : if (opts.create_slot)
848 : {
849 226 : bool twophase_enabled = false;
850 :
851 : Assert(opts.slot_name);
852 :
853 : /*
854 : * Even if two_phase is set, don't create the slot with
855 : * two-phase enabled. Will enable it once all the tables are
856 : * synced and ready. This avoids race-conditions like prepared
857 : * transactions being skipped due to changes not being applied
858 : * due to checks in should_apply_changes_for_rel() when
859 : * tablesync for the corresponding tables are in progress. See
860 : * comments atop worker.c.
861 : *
862 : * Note that if tables were specified but copy_data is false
863 : * then it is safe to enable two_phase up-front because those
864 : * tables are already initially in READY state. When the
865 : * subscription has no tables, we leave the twophase state as
866 : * PENDING, to allow ALTER SUBSCRIPTION ... REFRESH
867 : * PUBLICATION to work.
868 : */
869 226 : if (opts.twophase && !opts.copy_data && has_tables)
870 2 : twophase_enabled = true;
871 :
872 226 : walrcv_create_slot(wrconn, opts.slot_name, false, twophase_enabled,
873 : opts.failover, CRS_NOEXPORT_SNAPSHOT, NULL);
874 :
875 226 : if (twophase_enabled)
876 2 : UpdateTwoPhaseState(subid, LOGICALREP_TWOPHASE_STATE_ENABLED);
877 :
878 226 : ereport(NOTICE,
879 : (errmsg("created replication slot \"%s\" on publisher",
880 : opts.slot_name)));
881 : }
882 : }
883 2 : PG_FINALLY();
884 : {
885 238 : walrcv_disconnect(wrconn);
886 : }
887 238 : PG_END_TRY();
888 : }
889 : else
890 94 : ereport(WARNING,
891 : (errmsg("subscription was created, but is not connected"),
892 : errhint("To initiate replication, you must manually create the replication slot, enable the subscription, and alter the subscription to refresh publications.")));
893 :
894 330 : table_close(rel, RowExclusiveLock);
895 :
896 330 : pgstat_create_subscription(subid);
897 :
898 : /*
899 : * Notify the launcher to start the apply worker if the subscription is
900 : * enabled, or to create the conflict detection slot if retain_dead_tuples
901 : * is enabled.
902 : *
903 : * Creating the conflict detection slot is essential even when the
904 : * subscription is not enabled. This ensures that dead tuples are
905 : * retained, which is necessary for accurately identifying the type of
906 : * conflict during replication.
907 : */
908 330 : if (opts.enabled || opts.retaindeadtuples)
909 226 : ApplyLauncherWakeupAtCommit();
910 :
911 330 : ObjectAddressSet(myself, SubscriptionRelationId, subid);
912 :
913 330 : InvokeObjectPostCreateHook(SubscriptionRelationId, subid, 0);
914 :
915 330 : return myself;
916 : }
917 :
918 : static void
919 76 : AlterSubscription_refresh(Subscription *sub, bool copy_data,
920 : List *validate_publications)
921 : {
922 : char *err;
923 76 : List *pubrels = NIL;
924 : Oid *pubrel_local_oids;
925 : List *subrel_states;
926 76 : List *sub_remove_rels = NIL;
927 : Oid *subrel_local_oids;
928 : Oid *subseq_local_oids;
929 : int subrel_count;
930 : ListCell *lc;
931 : int off;
932 76 : int tbl_count = 0;
933 76 : int seq_count = 0;
934 76 : Relation rel = NULL;
935 : typedef struct SubRemoveRels
936 : {
937 : Oid relid;
938 : char state;
939 : } SubRemoveRels;
940 :
941 : WalReceiverConn *wrconn;
942 : bool must_use_password;
943 :
944 : /* Load the library providing us libpq calls. */
945 76 : load_file("libpqwalreceiver", false);
946 :
947 : /* Try to connect to the publisher. */
948 76 : must_use_password = sub->passwordrequired && !sub->ownersuperuser;
949 76 : wrconn = walrcv_connect(sub->conninfo, true, true, must_use_password,
950 : sub->name, &err);
951 74 : if (!wrconn)
952 0 : ereport(ERROR,
953 : (errcode(ERRCODE_CONNECTION_FAILURE),
954 : errmsg("subscription \"%s\" could not connect to the publisher: %s",
955 : sub->name, err)));
956 :
957 74 : PG_TRY();
958 : {
959 74 : if (validate_publications)
960 18 : check_publications(wrconn, validate_publications);
961 :
962 : /* Get the relation list from publisher. */
963 74 : pubrels = fetch_relation_list(wrconn, sub->publications);
964 :
965 : /* Get local relation list. */
966 74 : subrel_states = GetSubscriptionRelations(sub->oid, true, true, false);
967 74 : subrel_count = list_length(subrel_states);
968 :
969 : /*
970 : * Build qsorted arrays of local table oids and sequence oids for
971 : * faster lookup. This can potentially contain all tables and
972 : * sequences in the database so speed of lookup is important.
973 : *
974 : * We do not yet know the exact count of tables and sequences, so we
975 : * allocate separate arrays for table OIDs and sequence OIDs based on
976 : * the total number of relations (subrel_count).
977 : */
978 74 : subrel_local_oids = palloc(subrel_count * sizeof(Oid));
979 74 : subseq_local_oids = palloc(subrel_count * sizeof(Oid));
980 268 : foreach(lc, subrel_states)
981 : {
982 194 : SubscriptionRelState *relstate = (SubscriptionRelState *) lfirst(lc);
983 :
984 194 : if (get_rel_relkind(relstate->relid) == RELKIND_SEQUENCE)
985 18 : subseq_local_oids[seq_count++] = relstate->relid;
986 : else
987 176 : subrel_local_oids[tbl_count++] = relstate->relid;
988 : }
989 :
990 74 : qsort(subrel_local_oids, tbl_count, sizeof(Oid), oid_cmp);
991 74 : check_publications_origin_tables(wrconn, sub->publications, copy_data,
992 74 : sub->retaindeadtuples, sub->origin,
993 : subrel_local_oids, tbl_count,
994 : sub->name);
995 :
996 74 : qsort(subseq_local_oids, seq_count, sizeof(Oid), oid_cmp);
997 74 : check_publications_origin_sequences(wrconn, sub->publications,
998 : copy_data, sub->origin,
999 : subseq_local_oids, seq_count,
1000 : sub->name);
1001 :
1002 : /*
1003 : * Walk over the remote relations and try to match them to locally
1004 : * known relations. If the relation is not known locally create a new
1005 : * state for it.
1006 : *
1007 : * Also builds array of local oids of remote relations for the next
1008 : * step.
1009 : */
1010 74 : off = 0;
1011 74 : pubrel_local_oids = palloc(list_length(pubrels) * sizeof(Oid));
1012 :
1013 352 : foreach_ptr(PublicationRelKind, pubrelinfo, pubrels)
1014 : {
1015 204 : RangeVar *rv = pubrelinfo->rv;
1016 : Oid relid;
1017 : char relkind;
1018 :
1019 204 : relid = RangeVarGetRelid(rv, AccessShareLock, false);
1020 204 : relkind = get_rel_relkind(relid);
1021 :
1022 : /* Check for supported relkind. */
1023 204 : CheckSubscriptionRelkind(relkind, pubrelinfo->relkind,
1024 204 : rv->schemaname, rv->relname);
1025 :
1026 204 : pubrel_local_oids[off++] = relid;
1027 :
1028 204 : if (!bsearch(&relid, subrel_local_oids,
1029 70 : tbl_count, sizeof(Oid), oid_cmp) &&
1030 70 : !bsearch(&relid, subseq_local_oids,
1031 : seq_count, sizeof(Oid), oid_cmp))
1032 : {
1033 52 : AddSubscriptionRelState(sub->oid, relid,
1034 : copy_data ? SUBREL_STATE_INIT : SUBREL_STATE_READY,
1035 : InvalidXLogRecPtr, true);
1036 52 : ereport(DEBUG1,
1037 : errmsg_internal("%s \"%s.%s\" added to subscription \"%s\"",
1038 : relkind == RELKIND_SEQUENCE ? "sequence" : "table",
1039 : rv->schemaname, rv->relname, sub->name));
1040 : }
1041 : }
1042 :
1043 : /*
1044 : * Next remove state for tables we should not care about anymore using
1045 : * the data we collected above
1046 : */
1047 74 : qsort(pubrel_local_oids, list_length(pubrels), sizeof(Oid), oid_cmp);
1048 :
1049 250 : for (off = 0; off < tbl_count; off++)
1050 : {
1051 176 : Oid relid = subrel_local_oids[off];
1052 :
1053 176 : if (!bsearch(&relid, pubrel_local_oids,
1054 176 : list_length(pubrels), sizeof(Oid), oid_cmp))
1055 : {
1056 : char state;
1057 : XLogRecPtr statelsn;
1058 42 : SubRemoveRels *remove_rel = palloc(sizeof(SubRemoveRels));
1059 :
1060 : /*
1061 : * Lock pg_subscription_rel with AccessExclusiveLock to
1062 : * prevent any race conditions with the apply worker
1063 : * re-launching workers at the same time this code is trying
1064 : * to remove those tables.
1065 : *
1066 : * Even if new worker for this particular rel is restarted it
1067 : * won't be able to make any progress as we hold exclusive
1068 : * lock on pg_subscription_rel till the transaction end. It
1069 : * will simply exit as there is no corresponding rel entry.
1070 : *
1071 : * This locking also ensures that the state of rels won't
1072 : * change till we are done with this refresh operation.
1073 : */
1074 42 : if (!rel)
1075 18 : rel = table_open(SubscriptionRelRelationId, AccessExclusiveLock);
1076 :
1077 : /* Last known rel state. */
1078 42 : state = GetSubscriptionRelState(sub->oid, relid, &statelsn);
1079 :
1080 42 : RemoveSubscriptionRel(sub->oid, relid);
1081 :
1082 42 : remove_rel->relid = relid;
1083 42 : remove_rel->state = state;
1084 :
1085 42 : sub_remove_rels = lappend(sub_remove_rels, remove_rel);
1086 :
1087 42 : logicalrep_worker_stop(WORKERTYPE_TABLESYNC, sub->oid, relid);
1088 :
1089 : /*
1090 : * For READY state, we would have already dropped the
1091 : * tablesync origin.
1092 : */
1093 42 : if (state != SUBREL_STATE_READY)
1094 : {
1095 : char originname[NAMEDATALEN];
1096 :
1097 : /*
1098 : * Drop the tablesync's origin tracking if exists.
1099 : *
1100 : * It is possible that the origin is not yet created for
1101 : * tablesync worker, this can happen for the states before
1102 : * SUBREL_STATE_FINISHEDCOPY. The tablesync worker or
1103 : * apply worker can also concurrently try to drop the
1104 : * origin and by this time the origin might be already
1105 : * removed. For these reasons, passing missing_ok = true.
1106 : */
1107 0 : ReplicationOriginNameForLogicalRep(sub->oid, relid, originname,
1108 : sizeof(originname));
1109 0 : replorigin_drop_by_name(originname, true, false);
1110 : }
1111 :
1112 42 : ereport(DEBUG1,
1113 : (errmsg_internal("table \"%s.%s\" removed from subscription \"%s\"",
1114 : get_namespace_name(get_rel_namespace(relid)),
1115 : get_rel_name(relid),
1116 : sub->name)));
1117 : }
1118 : }
1119 :
1120 : /*
1121 : * Drop the tablesync slots associated with removed tables. This has
1122 : * to be at the end because otherwise if there is an error while doing
1123 : * the database operations we won't be able to rollback dropped slots.
1124 : */
1125 190 : foreach_ptr(SubRemoveRels, rel, sub_remove_rels)
1126 : {
1127 42 : if (rel->state != SUBREL_STATE_READY &&
1128 0 : rel->state != SUBREL_STATE_SYNCDONE)
1129 : {
1130 0 : char syncslotname[NAMEDATALEN] = {0};
1131 :
1132 : /*
1133 : * For READY/SYNCDONE states we know the tablesync slot has
1134 : * already been dropped by the tablesync worker.
1135 : *
1136 : * For other states, there is no certainty, maybe the slot
1137 : * does not exist yet. Also, if we fail after removing some of
1138 : * the slots, next time, it will again try to drop already
1139 : * dropped slots and fail. For these reasons, we allow
1140 : * missing_ok = true for the drop.
1141 : */
1142 0 : ReplicationSlotNameForTablesync(sub->oid, rel->relid,
1143 : syncslotname, sizeof(syncslotname));
1144 0 : ReplicationSlotDropAtPubNode(wrconn, syncslotname, true);
1145 : }
1146 : }
1147 :
1148 : /*
1149 : * Next remove state for sequences we should not care about anymore
1150 : * using the data we collected above
1151 : */
1152 92 : for (off = 0; off < seq_count; off++)
1153 : {
1154 18 : Oid relid = subseq_local_oids[off];
1155 :
1156 18 : if (!bsearch(&relid, pubrel_local_oids,
1157 18 : list_length(pubrels), sizeof(Oid), oid_cmp))
1158 : {
1159 : /*
1160 : * This locking ensures that the state of rels won't change
1161 : * till we are done with this refresh operation.
1162 : */
1163 0 : if (!rel)
1164 0 : rel = table_open(SubscriptionRelRelationId, AccessExclusiveLock);
1165 :
1166 0 : RemoveSubscriptionRel(sub->oid, relid);
1167 :
1168 0 : ereport(DEBUG1,
1169 : errmsg_internal("sequence \"%s.%s\" removed from subscription \"%s\"",
1170 : get_namespace_name(get_rel_namespace(relid)),
1171 : get_rel_name(relid),
1172 : sub->name));
1173 : }
1174 : }
1175 : }
1176 0 : PG_FINALLY();
1177 : {
1178 74 : walrcv_disconnect(wrconn);
1179 : }
1180 74 : PG_END_TRY();
1181 :
1182 74 : if (rel)
1183 18 : table_close(rel, NoLock);
1184 74 : }
1185 :
1186 : /*
1187 : * Marks all sequences with INIT state.
1188 : */
1189 : static void
1190 2 : AlterSubscription_refresh_seq(Subscription *sub)
1191 : {
1192 2 : char *err = NULL;
1193 : WalReceiverConn *wrconn;
1194 : bool must_use_password;
1195 :
1196 : /* Load the library providing us libpq calls. */
1197 2 : load_file("libpqwalreceiver", false);
1198 :
1199 : /* Try to connect to the publisher. */
1200 2 : must_use_password = sub->passwordrequired && !sub->ownersuperuser;
1201 2 : wrconn = walrcv_connect(sub->conninfo, true, true, must_use_password,
1202 : sub->name, &err);
1203 2 : if (!wrconn)
1204 0 : ereport(ERROR,
1205 : errcode(ERRCODE_CONNECTION_FAILURE),
1206 : errmsg("subscription \"%s\" could not connect to the publisher: %s",
1207 : sub->name, err));
1208 :
1209 2 : PG_TRY();
1210 : {
1211 : List *subrel_states;
1212 :
1213 2 : check_publications_origin_sequences(wrconn, sub->publications, true,
1214 : sub->origin, NULL, 0, sub->name);
1215 :
1216 : /* Get local sequence list. */
1217 2 : subrel_states = GetSubscriptionRelations(sub->oid, false, true, false);
1218 10 : foreach_ptr(SubscriptionRelState, subrel, subrel_states)
1219 : {
1220 6 : Oid relid = subrel->relid;
1221 :
1222 6 : UpdateSubscriptionRelState(sub->oid, relid, SUBREL_STATE_INIT,
1223 : InvalidXLogRecPtr, false);
1224 6 : ereport(DEBUG1,
1225 : errmsg_internal("sequence \"%s.%s\" of subscription \"%s\" set to INIT state",
1226 : get_namespace_name(get_rel_namespace(relid)),
1227 : get_rel_name(relid),
1228 : sub->name));
1229 : }
1230 : }
1231 0 : PG_FINALLY();
1232 : {
1233 2 : walrcv_disconnect(wrconn);
1234 : }
1235 2 : PG_END_TRY();
1236 2 : }
1237 :
1238 : /*
1239 : * Common checks for altering failover, two_phase, and retain_dead_tuples
1240 : * options.
1241 : */
1242 : static void
1243 26 : CheckAlterSubOption(Subscription *sub, const char *option,
1244 : bool slot_needs_update, bool isTopLevel)
1245 : {
1246 : Assert(strcmp(option, "failover") == 0 ||
1247 : strcmp(option, "two_phase") == 0 ||
1248 : strcmp(option, "retain_dead_tuples") == 0);
1249 :
1250 : /*
1251 : * Altering the retain_dead_tuples option does not update the slot on the
1252 : * publisher.
1253 : */
1254 : Assert(!slot_needs_update || strcmp(option, "retain_dead_tuples") != 0);
1255 :
1256 : /*
1257 : * Do not allow changing the option if the subscription is enabled. This
1258 : * is because both failover and two_phase options of the slot on the
1259 : * publisher cannot be modified if the slot is currently acquired by the
1260 : * existing walsender.
1261 : *
1262 : * Note that two_phase is enabled (aka changed from 'false' to 'true') on
1263 : * the publisher by the existing walsender, so we could have allowed that
1264 : * even when the subscription is enabled. But we kept this restriction for
1265 : * the sake of consistency and simplicity.
1266 : *
1267 : * Additionally, do not allow changing the retain_dead_tuples option when
1268 : * the subscription is enabled to prevent race conditions arising from the
1269 : * new option value being acknowledged asynchronously by the launcher and
1270 : * apply workers.
1271 : *
1272 : * Without the restriction, a race condition may arise when a user
1273 : * disables and immediately re-enables the retain_dead_tuples option. In
1274 : * this case, the launcher might drop the slot upon noticing the disabled
1275 : * action, while the apply worker may keep maintaining
1276 : * oldest_nonremovable_xid without noticing the option change. During this
1277 : * period, a transaction ID wraparound could falsely make this ID appear
1278 : * as if it originates from the future w.r.t the transaction ID stored in
1279 : * the slot maintained by launcher.
1280 : *
1281 : * Similarly, if the user enables retain_dead_tuples concurrently with the
1282 : * launcher starting the worker, the apply worker may start calculating
1283 : * oldest_nonremovable_xid before the launcher notices the enable action.
1284 : * Consequently, the launcher may update slot.xmin to a newer value than
1285 : * that maintained by the worker. In subsequent cycles, upon integrating
1286 : * the worker's oldest_nonremovable_xid, the launcher might detect a
1287 : * retreat in the calculated xmin, necessitating additional handling.
1288 : *
1289 : * XXX To address the above race conditions, we can define
1290 : * oldest_nonremovable_xid as FullTransactionID and adds the check to
1291 : * disallow retreating the conflict slot's xmin. For now, we kept the
1292 : * implementation simple by disallowing change to the retain_dead_tuples,
1293 : * but in the future we can change this after some more analysis.
1294 : *
1295 : * Note that we could restrict only the enabling of retain_dead_tuples to
1296 : * avoid the race conditions described above, but we maintain the
1297 : * restriction for both enable and disable operations for the sake of
1298 : * consistency.
1299 : */
1300 26 : if (sub->enabled)
1301 4 : ereport(ERROR,
1302 : (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
1303 : errmsg("cannot set option \"%s\" for enabled subscription",
1304 : option)));
1305 :
1306 22 : if (slot_needs_update)
1307 : {
1308 : StringInfoData cmd;
1309 :
1310 : /*
1311 : * A valid slot must be associated with the subscription for us to
1312 : * modify any of the slot's properties.
1313 : */
1314 16 : if (!sub->slotname)
1315 0 : ereport(ERROR,
1316 : (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
1317 : errmsg("cannot set option \"%s\" for a subscription that does not have a slot name",
1318 : option)));
1319 :
1320 : /* The changed option of the slot can't be rolled back. */
1321 16 : initStringInfo(&cmd);
1322 16 : appendStringInfo(&cmd, "ALTER SUBSCRIPTION ... SET (%s)", option);
1323 :
1324 16 : PreventInTransactionBlock(isTopLevel, cmd.data);
1325 10 : pfree(cmd.data);
1326 : }
1327 16 : }
1328 :
1329 : /*
1330 : * Alter the existing subscription.
1331 : */
1332 : ObjectAddress
1333 528 : AlterSubscription(ParseState *pstate, AlterSubscriptionStmt *stmt,
1334 : bool isTopLevel)
1335 : {
1336 : Relation rel;
1337 : ObjectAddress myself;
1338 : bool nulls[Natts_pg_subscription];
1339 : bool replaces[Natts_pg_subscription];
1340 : Datum values[Natts_pg_subscription];
1341 : HeapTuple tup;
1342 : Oid subid;
1343 528 : bool update_tuple = false;
1344 528 : bool update_failover = false;
1345 528 : bool update_two_phase = false;
1346 528 : bool check_pub_rdt = false;
1347 : bool retain_dead_tuples;
1348 : int max_retention;
1349 : bool retention_active;
1350 : char *origin;
1351 : Subscription *sub;
1352 : Form_pg_subscription form;
1353 : bits32 supported_opts;
1354 528 : SubOpts opts = {0};
1355 :
1356 528 : rel = table_open(SubscriptionRelationId, RowExclusiveLock);
1357 :
1358 : /* Fetch the existing tuple. */
1359 528 : tup = SearchSysCacheCopy2(SUBSCRIPTIONNAME, ObjectIdGetDatum(MyDatabaseId),
1360 : CStringGetDatum(stmt->subname));
1361 :
1362 528 : if (!HeapTupleIsValid(tup))
1363 6 : ereport(ERROR,
1364 : (errcode(ERRCODE_UNDEFINED_OBJECT),
1365 : errmsg("subscription \"%s\" does not exist",
1366 : stmt->subname)));
1367 :
1368 522 : form = (Form_pg_subscription) GETSTRUCT(tup);
1369 522 : subid = form->oid;
1370 :
1371 : /* must be owner */
1372 522 : if (!object_ownercheck(SubscriptionRelationId, subid, GetUserId()))
1373 0 : aclcheck_error(ACLCHECK_NOT_OWNER, OBJECT_SUBSCRIPTION,
1374 0 : stmt->subname);
1375 :
1376 522 : sub = GetSubscription(subid, false);
1377 :
1378 522 : retain_dead_tuples = sub->retaindeadtuples;
1379 522 : origin = sub->origin;
1380 522 : max_retention = sub->maxretention;
1381 522 : retention_active = sub->retentionactive;
1382 :
1383 : /*
1384 : * Don't allow non-superuser modification of a subscription with
1385 : * password_required=false.
1386 : */
1387 522 : if (!sub->passwordrequired && !superuser())
1388 0 : ereport(ERROR,
1389 : (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
1390 : errmsg("password_required=false is superuser-only"),
1391 : errhint("Subscriptions with the password_required option set to false may only be created or modified by the superuser.")));
1392 :
1393 : /* Lock the subscription so nobody else can do anything with it. */
1394 522 : LockSharedObject(SubscriptionRelationId, subid, 0, AccessExclusiveLock);
1395 :
1396 : /* Form a new tuple. */
1397 522 : memset(values, 0, sizeof(values));
1398 522 : memset(nulls, false, sizeof(nulls));
1399 522 : memset(replaces, false, sizeof(replaces));
1400 :
1401 522 : switch (stmt->kind)
1402 : {
1403 218 : case ALTER_SUBSCRIPTION_OPTIONS:
1404 : {
1405 218 : supported_opts = (SUBOPT_SLOT_NAME |
1406 : SUBOPT_SYNCHRONOUS_COMMIT | SUBOPT_BINARY |
1407 : SUBOPT_STREAMING | SUBOPT_TWOPHASE_COMMIT |
1408 : SUBOPT_DISABLE_ON_ERR |
1409 : SUBOPT_PASSWORD_REQUIRED |
1410 : SUBOPT_RUN_AS_OWNER | SUBOPT_FAILOVER |
1411 : SUBOPT_RETAIN_DEAD_TUPLES |
1412 : SUBOPT_MAX_RETENTION_DURATION |
1413 : SUBOPT_ORIGIN);
1414 :
1415 218 : parse_subscription_options(pstate, stmt->options,
1416 : supported_opts, &opts);
1417 :
1418 200 : if (IsSet(opts.specified_opts, SUBOPT_SLOT_NAME))
1419 : {
1420 : /*
1421 : * The subscription must be disabled to allow slot_name as
1422 : * 'none', otherwise, the apply worker will repeatedly try
1423 : * to stream the data using that slot_name which neither
1424 : * exists on the publisher nor the user will be allowed to
1425 : * create it.
1426 : */
1427 72 : if (sub->enabled && !opts.slot_name)
1428 0 : ereport(ERROR,
1429 : (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
1430 : errmsg("cannot set %s for enabled subscription",
1431 : "slot_name = NONE")));
1432 :
1433 72 : if (opts.slot_name)
1434 6 : values[Anum_pg_subscription_subslotname - 1] =
1435 6 : DirectFunctionCall1(namein, CStringGetDatum(opts.slot_name));
1436 : else
1437 66 : nulls[Anum_pg_subscription_subslotname - 1] = true;
1438 72 : replaces[Anum_pg_subscription_subslotname - 1] = true;
1439 : }
1440 :
1441 200 : if (opts.synchronous_commit)
1442 : {
1443 6 : values[Anum_pg_subscription_subsynccommit - 1] =
1444 6 : CStringGetTextDatum(opts.synchronous_commit);
1445 6 : replaces[Anum_pg_subscription_subsynccommit - 1] = true;
1446 : }
1447 :
1448 200 : if (IsSet(opts.specified_opts, SUBOPT_BINARY))
1449 : {
1450 18 : values[Anum_pg_subscription_subbinary - 1] =
1451 18 : BoolGetDatum(opts.binary);
1452 18 : replaces[Anum_pg_subscription_subbinary - 1] = true;
1453 : }
1454 :
1455 200 : if (IsSet(opts.specified_opts, SUBOPT_STREAMING))
1456 : {
1457 30 : values[Anum_pg_subscription_substream - 1] =
1458 30 : CharGetDatum(opts.streaming);
1459 30 : replaces[Anum_pg_subscription_substream - 1] = true;
1460 : }
1461 :
1462 200 : if (IsSet(opts.specified_opts, SUBOPT_DISABLE_ON_ERR))
1463 : {
1464 : values[Anum_pg_subscription_subdisableonerr - 1]
1465 6 : = BoolGetDatum(opts.disableonerr);
1466 : replaces[Anum_pg_subscription_subdisableonerr - 1]
1467 6 : = true;
1468 : }
1469 :
1470 200 : if (IsSet(opts.specified_opts, SUBOPT_PASSWORD_REQUIRED))
1471 : {
1472 : /* Non-superuser may not disable password_required. */
1473 12 : if (!opts.passwordrequired && !superuser())
1474 0 : ereport(ERROR,
1475 : (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
1476 : errmsg("password_required=false is superuser-only"),
1477 : errhint("Subscriptions with the password_required option set to false may only be created or modified by the superuser.")));
1478 :
1479 : values[Anum_pg_subscription_subpasswordrequired - 1]
1480 12 : = BoolGetDatum(opts.passwordrequired);
1481 : replaces[Anum_pg_subscription_subpasswordrequired - 1]
1482 12 : = true;
1483 : }
1484 :
1485 200 : if (IsSet(opts.specified_opts, SUBOPT_RUN_AS_OWNER))
1486 : {
1487 14 : values[Anum_pg_subscription_subrunasowner - 1] =
1488 14 : BoolGetDatum(opts.runasowner);
1489 14 : replaces[Anum_pg_subscription_subrunasowner - 1] = true;
1490 : }
1491 :
1492 200 : if (IsSet(opts.specified_opts, SUBOPT_TWOPHASE_COMMIT))
1493 : {
1494 : /*
1495 : * We need to update both the slot and the subscription
1496 : * for the two_phase option. We can enable the two_phase
1497 : * option for a slot only once the initial data
1498 : * synchronization is done. This is to avoid missing some
1499 : * data as explained in comments atop worker.c.
1500 : */
1501 6 : update_two_phase = !opts.twophase;
1502 :
1503 6 : CheckAlterSubOption(sub, "two_phase", update_two_phase,
1504 : isTopLevel);
1505 :
1506 : /*
1507 : * Modifying the two_phase slot option requires a slot
1508 : * lookup by slot name, so changing the slot name at the
1509 : * same time is not allowed.
1510 : */
1511 6 : if (update_two_phase &&
1512 2 : IsSet(opts.specified_opts, SUBOPT_SLOT_NAME))
1513 0 : ereport(ERROR,
1514 : (errcode(ERRCODE_SYNTAX_ERROR),
1515 : errmsg("\"slot_name\" and \"two_phase\" cannot be altered at the same time")));
1516 :
1517 : /*
1518 : * Note that workers may still survive even if the
1519 : * subscription has been disabled.
1520 : *
1521 : * Ensure workers have already been exited to avoid
1522 : * getting prepared transactions while we are disabling
1523 : * the two_phase option. Otherwise, the changes of an
1524 : * already prepared transaction can be replicated again
1525 : * along with its corresponding commit, leading to
1526 : * duplicate data or errors.
1527 : */
1528 6 : if (logicalrep_workers_find(subid, true, true))
1529 0 : ereport(ERROR,
1530 : (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
1531 : errmsg("cannot alter \"two_phase\" when logical replication worker is still running"),
1532 : errhint("Try again after some time.")));
1533 :
1534 : /*
1535 : * two_phase cannot be disabled if there are any
1536 : * uncommitted prepared transactions present otherwise it
1537 : * can lead to duplicate data or errors as explained in
1538 : * the comment above.
1539 : */
1540 6 : if (update_two_phase &&
1541 2 : sub->twophasestate == LOGICALREP_TWOPHASE_STATE_ENABLED &&
1542 2 : LookupGXactBySubid(subid))
1543 0 : ereport(ERROR,
1544 : (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
1545 : errmsg("cannot disable \"two_phase\" when prepared transactions exist"),
1546 : errhint("Resolve these transactions and try again.")));
1547 :
1548 : /* Change system catalog accordingly */
1549 6 : values[Anum_pg_subscription_subtwophasestate - 1] =
1550 6 : CharGetDatum(opts.twophase ?
1551 : LOGICALREP_TWOPHASE_STATE_PENDING :
1552 : LOGICALREP_TWOPHASE_STATE_DISABLED);
1553 6 : replaces[Anum_pg_subscription_subtwophasestate - 1] = true;
1554 : }
1555 :
1556 200 : if (IsSet(opts.specified_opts, SUBOPT_FAILOVER))
1557 : {
1558 : /*
1559 : * Similar to the two_phase case above, we need to update
1560 : * the failover option for both the slot and the
1561 : * subscription.
1562 : */
1563 16 : update_failover = true;
1564 :
1565 16 : CheckAlterSubOption(sub, "failover", update_failover,
1566 : isTopLevel);
1567 :
1568 8 : values[Anum_pg_subscription_subfailover - 1] =
1569 8 : BoolGetDatum(opts.failover);
1570 8 : replaces[Anum_pg_subscription_subfailover - 1] = true;
1571 : }
1572 :
1573 192 : if (IsSet(opts.specified_opts, SUBOPT_RETAIN_DEAD_TUPLES))
1574 : {
1575 4 : values[Anum_pg_subscription_subretaindeadtuples - 1] =
1576 4 : BoolGetDatum(opts.retaindeadtuples);
1577 4 : replaces[Anum_pg_subscription_subretaindeadtuples - 1] = true;
1578 :
1579 : /*
1580 : * Update the retention status only if there's a change in
1581 : * the retain_dead_tuples option value.
1582 : *
1583 : * Automatically marking retention as active when
1584 : * retain_dead_tuples is enabled may not always be ideal,
1585 : * especially if retention was previously stopped and the
1586 : * user toggles retain_dead_tuples without adjusting the
1587 : * publisher workload. However, this behavior provides a
1588 : * convenient way for users to manually refresh the
1589 : * retention status. Since retention will be stopped again
1590 : * unless the publisher workload is reduced, this approach
1591 : * is acceptable for now.
1592 : */
1593 4 : if (opts.retaindeadtuples != sub->retaindeadtuples)
1594 : {
1595 4 : values[Anum_pg_subscription_subretentionactive - 1] =
1596 4 : BoolGetDatum(opts.retaindeadtuples);
1597 4 : replaces[Anum_pg_subscription_subretentionactive - 1] = true;
1598 :
1599 4 : retention_active = opts.retaindeadtuples;
1600 : }
1601 :
1602 4 : CheckAlterSubOption(sub, "retain_dead_tuples", false, isTopLevel);
1603 :
1604 : /*
1605 : * Workers may continue running even after the
1606 : * subscription has been disabled.
1607 : *
1608 : * To prevent race conditions (as described in
1609 : * CheckAlterSubOption()), ensure that all worker
1610 : * processes have already exited before proceeding.
1611 : */
1612 2 : if (logicalrep_workers_find(subid, true, true))
1613 0 : ereport(ERROR,
1614 : (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
1615 : errmsg("cannot alter retain_dead_tuples when logical replication worker is still running"),
1616 : errhint("Try again after some time.")));
1617 :
1618 : /*
1619 : * Notify the launcher to manage the replication slot for
1620 : * conflict detection. This ensures that replication slot
1621 : * is efficiently handled (created, updated, or dropped)
1622 : * in response to any configuration changes.
1623 : */
1624 2 : ApplyLauncherWakeupAtCommit();
1625 :
1626 2 : check_pub_rdt = opts.retaindeadtuples;
1627 2 : retain_dead_tuples = opts.retaindeadtuples;
1628 : }
1629 :
1630 190 : if (IsSet(opts.specified_opts, SUBOPT_MAX_RETENTION_DURATION))
1631 : {
1632 10 : values[Anum_pg_subscription_submaxretention - 1] =
1633 10 : Int32GetDatum(opts.maxretention);
1634 10 : replaces[Anum_pg_subscription_submaxretention - 1] = true;
1635 :
1636 10 : max_retention = opts.maxretention;
1637 : }
1638 :
1639 : /*
1640 : * Ensure that system configuration parameters are set
1641 : * appropriately to support retain_dead_tuples and
1642 : * max_retention_duration.
1643 : */
1644 190 : if (IsSet(opts.specified_opts, SUBOPT_RETAIN_DEAD_TUPLES) ||
1645 188 : IsSet(opts.specified_opts, SUBOPT_MAX_RETENTION_DURATION))
1646 12 : CheckSubDeadTupleRetention(true, !sub->enabled, NOTICE,
1647 : retain_dead_tuples,
1648 : retention_active,
1649 12 : (max_retention > 0));
1650 :
1651 190 : if (IsSet(opts.specified_opts, SUBOPT_ORIGIN))
1652 : {
1653 10 : values[Anum_pg_subscription_suborigin - 1] =
1654 10 : CStringGetTextDatum(opts.origin);
1655 10 : replaces[Anum_pg_subscription_suborigin - 1] = true;
1656 :
1657 : /*
1658 : * Check if changes from different origins may be received
1659 : * from the publisher when the origin is changed to ANY
1660 : * and retain_dead_tuples is enabled.
1661 : */
1662 14 : check_pub_rdt = retain_dead_tuples &&
1663 4 : pg_strcasecmp(opts.origin, LOGICALREP_ORIGIN_ANY) == 0;
1664 :
1665 10 : origin = opts.origin;
1666 : }
1667 :
1668 190 : update_tuple = true;
1669 190 : break;
1670 : }
1671 :
1672 104 : case ALTER_SUBSCRIPTION_ENABLED:
1673 : {
1674 104 : parse_subscription_options(pstate, stmt->options,
1675 : SUBOPT_ENABLED, &opts);
1676 : Assert(IsSet(opts.specified_opts, SUBOPT_ENABLED));
1677 :
1678 104 : if (!sub->slotname && opts.enabled)
1679 6 : ereport(ERROR,
1680 : (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
1681 : errmsg("cannot enable subscription that does not have a slot name")));
1682 :
1683 : /*
1684 : * Check track_commit_timestamp only when enabling the
1685 : * subscription in case it was disabled after creation. See
1686 : * comments atop CheckSubDeadTupleRetention() for details.
1687 : */
1688 98 : CheckSubDeadTupleRetention(opts.enabled, !opts.enabled,
1689 98 : WARNING, sub->retaindeadtuples,
1690 98 : sub->retentionactive, false);
1691 :
1692 98 : values[Anum_pg_subscription_subenabled - 1] =
1693 98 : BoolGetDatum(opts.enabled);
1694 98 : replaces[Anum_pg_subscription_subenabled - 1] = true;
1695 :
1696 98 : if (opts.enabled)
1697 54 : ApplyLauncherWakeupAtCommit();
1698 :
1699 98 : update_tuple = true;
1700 :
1701 : /*
1702 : * The subscription might be initially created with
1703 : * connect=false and retain_dead_tuples=true, meaning the
1704 : * remote server's status may not be checked. Ensure this
1705 : * check is conducted now.
1706 : */
1707 98 : check_pub_rdt = sub->retaindeadtuples && opts.enabled;
1708 98 : break;
1709 : }
1710 :
1711 20 : case ALTER_SUBSCRIPTION_CONNECTION:
1712 : /* Load the library providing us libpq calls. */
1713 20 : load_file("libpqwalreceiver", false);
1714 : /* Check the connection info string. */
1715 20 : walrcv_check_conninfo(stmt->conninfo,
1716 : sub->passwordrequired && !sub->ownersuperuser);
1717 :
1718 14 : values[Anum_pg_subscription_subconninfo - 1] =
1719 14 : CStringGetTextDatum(stmt->conninfo);
1720 14 : replaces[Anum_pg_subscription_subconninfo - 1] = true;
1721 14 : update_tuple = true;
1722 :
1723 : /*
1724 : * Since the remote server configuration might have changed,
1725 : * perform a check to ensure it permits enabling
1726 : * retain_dead_tuples.
1727 : */
1728 14 : check_pub_rdt = sub->retaindeadtuples;
1729 14 : break;
1730 :
1731 32 : case ALTER_SUBSCRIPTION_SET_PUBLICATION:
1732 : {
1733 32 : supported_opts = SUBOPT_COPY_DATA | SUBOPT_REFRESH;
1734 32 : parse_subscription_options(pstate, stmt->options,
1735 : supported_opts, &opts);
1736 :
1737 32 : values[Anum_pg_subscription_subpublications - 1] =
1738 32 : publicationListToArray(stmt->publication);
1739 32 : replaces[Anum_pg_subscription_subpublications - 1] = true;
1740 :
1741 32 : update_tuple = true;
1742 :
1743 : /* Refresh if user asked us to. */
1744 32 : if (opts.refresh)
1745 : {
1746 26 : if (!sub->enabled)
1747 0 : ereport(ERROR,
1748 : (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
1749 : errmsg("ALTER SUBSCRIPTION with refresh is not allowed for disabled subscriptions"),
1750 : errhint("Use ALTER SUBSCRIPTION ... SET PUBLICATION ... WITH (refresh = false).")));
1751 :
1752 : /*
1753 : * See ALTER_SUBSCRIPTION_REFRESH_PUBLICATION for details
1754 : * why this is not allowed.
1755 : */
1756 26 : if (sub->twophasestate == LOGICALREP_TWOPHASE_STATE_ENABLED && opts.copy_data)
1757 0 : ereport(ERROR,
1758 : (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
1759 : errmsg("ALTER SUBSCRIPTION with refresh and copy_data is not allowed when two_phase is enabled"),
1760 : errhint("Use ALTER SUBSCRIPTION ... SET PUBLICATION with refresh = false, or with copy_data = false, or use DROP/CREATE SUBSCRIPTION.")));
1761 :
1762 26 : PreventInTransactionBlock(isTopLevel, "ALTER SUBSCRIPTION with refresh");
1763 :
1764 : /* Make sure refresh sees the new list of publications. */
1765 14 : sub->publications = stmt->publication;
1766 :
1767 14 : AlterSubscription_refresh(sub, opts.copy_data,
1768 : stmt->publication);
1769 : }
1770 :
1771 20 : break;
1772 : }
1773 :
1774 54 : case ALTER_SUBSCRIPTION_ADD_PUBLICATION:
1775 : case ALTER_SUBSCRIPTION_DROP_PUBLICATION:
1776 : {
1777 : List *publist;
1778 54 : bool isadd = stmt->kind == ALTER_SUBSCRIPTION_ADD_PUBLICATION;
1779 :
1780 54 : supported_opts = SUBOPT_REFRESH | SUBOPT_COPY_DATA;
1781 54 : parse_subscription_options(pstate, stmt->options,
1782 : supported_opts, &opts);
1783 :
1784 54 : publist = merge_publications(sub->publications, stmt->publication, isadd, stmt->subname);
1785 18 : values[Anum_pg_subscription_subpublications - 1] =
1786 18 : publicationListToArray(publist);
1787 18 : replaces[Anum_pg_subscription_subpublications - 1] = true;
1788 :
1789 18 : update_tuple = true;
1790 :
1791 : /* Refresh if user asked us to. */
1792 18 : if (opts.refresh)
1793 : {
1794 : /* We only need to validate user specified publications. */
1795 6 : List *validate_publications = (isadd) ? stmt->publication : NULL;
1796 :
1797 6 : if (!sub->enabled)
1798 0 : ereport(ERROR,
1799 : (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
1800 : errmsg("ALTER SUBSCRIPTION with refresh is not allowed for disabled subscriptions"),
1801 : /* translator: %s is an SQL ALTER command */
1802 : errhint("Use %s instead.",
1803 : isadd ?
1804 : "ALTER SUBSCRIPTION ... ADD PUBLICATION ... WITH (refresh = false)" :
1805 : "ALTER SUBSCRIPTION ... DROP PUBLICATION ... WITH (refresh = false)")));
1806 :
1807 : /*
1808 : * See ALTER_SUBSCRIPTION_REFRESH_PUBLICATION for details
1809 : * why this is not allowed.
1810 : */
1811 6 : if (sub->twophasestate == LOGICALREP_TWOPHASE_STATE_ENABLED && opts.copy_data)
1812 0 : ereport(ERROR,
1813 : (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
1814 : errmsg("ALTER SUBSCRIPTION with refresh and copy_data is not allowed when two_phase is enabled"),
1815 : /* translator: %s is an SQL ALTER command */
1816 : errhint("Use %s with refresh = false, or with copy_data = false, or use DROP/CREATE SUBSCRIPTION.",
1817 : isadd ?
1818 : "ALTER SUBSCRIPTION ... ADD PUBLICATION" :
1819 : "ALTER SUBSCRIPTION ... DROP PUBLICATION")));
1820 :
1821 6 : PreventInTransactionBlock(isTopLevel, "ALTER SUBSCRIPTION with refresh");
1822 :
1823 : /* Refresh the new list of publications. */
1824 6 : sub->publications = publist;
1825 :
1826 6 : AlterSubscription_refresh(sub, opts.copy_data,
1827 : validate_publications);
1828 : }
1829 :
1830 18 : break;
1831 : }
1832 :
1833 68 : case ALTER_SUBSCRIPTION_REFRESH_PUBLICATION:
1834 : {
1835 68 : if (!sub->enabled)
1836 6 : ereport(ERROR,
1837 : (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
1838 : errmsg("%s is not allowed for disabled subscriptions",
1839 : "ALTER SUBSCRIPTION ... REFRESH PUBLICATION")));
1840 :
1841 62 : parse_subscription_options(pstate, stmt->options,
1842 : SUBOPT_COPY_DATA, &opts);
1843 :
1844 : /*
1845 : * The subscription option "two_phase" requires that
1846 : * replication has passed the initial table synchronization
1847 : * phase before the two_phase becomes properly enabled.
1848 : *
1849 : * But, having reached this two-phase commit "enabled" state
1850 : * we must not allow any subsequent table initialization to
1851 : * occur. So the ALTER SUBSCRIPTION ... REFRESH PUBLICATION is
1852 : * disallowed when the user had requested two_phase = on mode.
1853 : *
1854 : * The exception to this restriction is when copy_data =
1855 : * false, because when copy_data is false the tablesync will
1856 : * start already in READY state and will exit directly without
1857 : * doing anything.
1858 : *
1859 : * For more details see comments atop worker.c.
1860 : */
1861 62 : if (sub->twophasestate == LOGICALREP_TWOPHASE_STATE_ENABLED && opts.copy_data)
1862 0 : ereport(ERROR,
1863 : (errcode(ERRCODE_SYNTAX_ERROR),
1864 : errmsg("ALTER SUBSCRIPTION ... REFRESH PUBLICATION with copy_data is not allowed when two_phase is enabled"),
1865 : errhint("Use ALTER SUBSCRIPTION ... REFRESH PUBLICATION with copy_data = false, or use DROP/CREATE SUBSCRIPTION.")));
1866 :
1867 62 : PreventInTransactionBlock(isTopLevel, "ALTER SUBSCRIPTION ... REFRESH PUBLICATION");
1868 :
1869 56 : AlterSubscription_refresh(sub, opts.copy_data, NULL);
1870 :
1871 54 : break;
1872 : }
1873 :
1874 2 : case ALTER_SUBSCRIPTION_REFRESH_SEQUENCES:
1875 : {
1876 2 : if (!sub->enabled)
1877 0 : ereport(ERROR,
1878 : errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
1879 : errmsg("%s is not allowed for disabled subscriptions",
1880 : "ALTER SUBSCRIPTION ... REFRESH SEQUENCES"));
1881 :
1882 2 : AlterSubscription_refresh_seq(sub);
1883 :
1884 2 : break;
1885 : }
1886 :
1887 24 : case ALTER_SUBSCRIPTION_SKIP:
1888 : {
1889 24 : parse_subscription_options(pstate, stmt->options, SUBOPT_LSN, &opts);
1890 :
1891 : /* ALTER SUBSCRIPTION ... SKIP supports only LSN option */
1892 : Assert(IsSet(opts.specified_opts, SUBOPT_LSN));
1893 :
1894 : /*
1895 : * If the user sets subskiplsn, we do a sanity check to make
1896 : * sure that the specified LSN is a probable value.
1897 : */
1898 18 : if (XLogRecPtrIsValid(opts.lsn))
1899 : {
1900 : RepOriginId originid;
1901 : char originname[NAMEDATALEN];
1902 : XLogRecPtr remote_lsn;
1903 :
1904 12 : ReplicationOriginNameForLogicalRep(subid, InvalidOid,
1905 : originname, sizeof(originname));
1906 12 : originid = replorigin_by_name(originname, false);
1907 12 : remote_lsn = replorigin_get_progress(originid, false);
1908 :
1909 : /* Check the given LSN is at least a future LSN */
1910 12 : if (XLogRecPtrIsValid(remote_lsn) && opts.lsn < remote_lsn)
1911 0 : ereport(ERROR,
1912 : (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
1913 : errmsg("skip WAL location (LSN %X/%08X) must be greater than origin LSN %X/%08X",
1914 : LSN_FORMAT_ARGS(opts.lsn),
1915 : LSN_FORMAT_ARGS(remote_lsn))));
1916 : }
1917 :
1918 18 : values[Anum_pg_subscription_subskiplsn - 1] = LSNGetDatum(opts.lsn);
1919 18 : replaces[Anum_pg_subscription_subskiplsn - 1] = true;
1920 :
1921 18 : update_tuple = true;
1922 18 : break;
1923 : }
1924 :
1925 0 : default:
1926 0 : elog(ERROR, "unrecognized ALTER SUBSCRIPTION kind %d",
1927 : stmt->kind);
1928 : }
1929 :
1930 : /* Update the catalog if needed. */
1931 414 : if (update_tuple)
1932 : {
1933 358 : tup = heap_modify_tuple(tup, RelationGetDescr(rel), values, nulls,
1934 : replaces);
1935 :
1936 358 : CatalogTupleUpdate(rel, &tup->t_self, tup);
1937 :
1938 358 : heap_freetuple(tup);
1939 : }
1940 :
1941 : /*
1942 : * Try to acquire the connection necessary either for modifying the slot
1943 : * or for checking if the remote server permits enabling
1944 : * retain_dead_tuples.
1945 : *
1946 : * This has to be at the end because otherwise if there is an error while
1947 : * doing the database operations we won't be able to rollback altered
1948 : * slot.
1949 : */
1950 414 : if (update_failover || update_two_phase || check_pub_rdt)
1951 : {
1952 : bool must_use_password;
1953 : char *err;
1954 : WalReceiverConn *wrconn;
1955 :
1956 : /* Load the library providing us libpq calls. */
1957 26 : load_file("libpqwalreceiver", false);
1958 :
1959 : /*
1960 : * Try to connect to the publisher, using the new connection string if
1961 : * available.
1962 : */
1963 26 : must_use_password = sub->passwordrequired && !sub->ownersuperuser;
1964 26 : wrconn = walrcv_connect(stmt->conninfo ? stmt->conninfo : sub->conninfo,
1965 : true, true, must_use_password, sub->name,
1966 : &err);
1967 26 : if (!wrconn)
1968 0 : ereport(ERROR,
1969 : (errcode(ERRCODE_CONNECTION_FAILURE),
1970 : errmsg("subscription \"%s\" could not connect to the publisher: %s",
1971 : sub->name, err)));
1972 :
1973 26 : PG_TRY();
1974 : {
1975 26 : if (retain_dead_tuples)
1976 18 : check_pub_dead_tuple_retention(wrconn);
1977 :
1978 26 : check_publications_origin_tables(wrconn, sub->publications, false,
1979 : retain_dead_tuples, origin, NULL, 0,
1980 : sub->name);
1981 :
1982 26 : if (update_failover || update_two_phase)
1983 10 : walrcv_alter_slot(wrconn, sub->slotname,
1984 : update_failover ? &opts.failover : NULL,
1985 : update_two_phase ? &opts.twophase : NULL);
1986 : }
1987 0 : PG_FINALLY();
1988 : {
1989 26 : walrcv_disconnect(wrconn);
1990 : }
1991 26 : PG_END_TRY();
1992 : }
1993 :
1994 414 : table_close(rel, RowExclusiveLock);
1995 :
1996 414 : ObjectAddressSet(myself, SubscriptionRelationId, subid);
1997 :
1998 414 : InvokeObjectPostAlterHook(SubscriptionRelationId, subid, 0);
1999 :
2000 : /* Wake up related replication workers to handle this change quickly. */
2001 414 : LogicalRepWorkersWakeupAtCommit(subid);
2002 :
2003 414 : return myself;
2004 : }
2005 :
2006 : /*
2007 : * Drop a subscription
2008 : */
2009 : void
2010 248 : DropSubscription(DropSubscriptionStmt *stmt, bool isTopLevel)
2011 : {
2012 : Relation rel;
2013 : ObjectAddress myself;
2014 : HeapTuple tup;
2015 : Oid subid;
2016 : Oid subowner;
2017 : Datum datum;
2018 : bool isnull;
2019 : char *subname;
2020 : char *conninfo;
2021 : char *slotname;
2022 : List *subworkers;
2023 : ListCell *lc;
2024 : char originname[NAMEDATALEN];
2025 248 : char *err = NULL;
2026 : WalReceiverConn *wrconn;
2027 : Form_pg_subscription form;
2028 : List *rstates;
2029 : bool must_use_password;
2030 :
2031 : /*
2032 : * The launcher may concurrently start a new worker for this subscription.
2033 : * During initialization, the worker checks for subscription validity and
2034 : * exits if the subscription has already been dropped. See
2035 : * InitializeLogRepWorker.
2036 : */
2037 248 : rel = table_open(SubscriptionRelationId, RowExclusiveLock);
2038 :
2039 248 : tup = SearchSysCache2(SUBSCRIPTIONNAME, ObjectIdGetDatum(MyDatabaseId),
2040 248 : CStringGetDatum(stmt->subname));
2041 :
2042 248 : if (!HeapTupleIsValid(tup))
2043 : {
2044 12 : table_close(rel, NoLock);
2045 :
2046 12 : if (!stmt->missing_ok)
2047 6 : ereport(ERROR,
2048 : (errcode(ERRCODE_UNDEFINED_OBJECT),
2049 : errmsg("subscription \"%s\" does not exist",
2050 : stmt->subname)));
2051 : else
2052 6 : ereport(NOTICE,
2053 : (errmsg("subscription \"%s\" does not exist, skipping",
2054 : stmt->subname)));
2055 :
2056 90 : return;
2057 : }
2058 :
2059 236 : form = (Form_pg_subscription) GETSTRUCT(tup);
2060 236 : subid = form->oid;
2061 236 : subowner = form->subowner;
2062 236 : must_use_password = !superuser_arg(subowner) && form->subpasswordrequired;
2063 :
2064 : /* must be owner */
2065 236 : if (!object_ownercheck(SubscriptionRelationId, subid, GetUserId()))
2066 0 : aclcheck_error(ACLCHECK_NOT_OWNER, OBJECT_SUBSCRIPTION,
2067 0 : stmt->subname);
2068 :
2069 : /* DROP hook for the subscription being removed */
2070 236 : InvokeObjectDropHook(SubscriptionRelationId, subid, 0);
2071 :
2072 : /*
2073 : * Lock the subscription so nobody else can do anything with it (including
2074 : * the replication workers).
2075 : */
2076 236 : LockSharedObject(SubscriptionRelationId, subid, 0, AccessExclusiveLock);
2077 :
2078 : /* Get subname */
2079 236 : datum = SysCacheGetAttrNotNull(SUBSCRIPTIONOID, tup,
2080 : Anum_pg_subscription_subname);
2081 236 : subname = pstrdup(NameStr(*DatumGetName(datum)));
2082 :
2083 : /* Get conninfo */
2084 236 : datum = SysCacheGetAttrNotNull(SUBSCRIPTIONOID, tup,
2085 : Anum_pg_subscription_subconninfo);
2086 236 : conninfo = TextDatumGetCString(datum);
2087 :
2088 : /* Get slotname */
2089 236 : datum = SysCacheGetAttr(SUBSCRIPTIONOID, tup,
2090 : Anum_pg_subscription_subslotname, &isnull);
2091 236 : if (!isnull)
2092 150 : slotname = pstrdup(NameStr(*DatumGetName(datum)));
2093 : else
2094 86 : slotname = NULL;
2095 :
2096 : /*
2097 : * Since dropping a replication slot is not transactional, the replication
2098 : * slot stays dropped even if the transaction rolls back. So we cannot
2099 : * run DROP SUBSCRIPTION inside a transaction block if dropping the
2100 : * replication slot. Also, in this case, we report a message for dropping
2101 : * the subscription to the cumulative stats system.
2102 : *
2103 : * XXX The command name should really be something like "DROP SUBSCRIPTION
2104 : * of a subscription that is associated with a replication slot", but we
2105 : * don't have the proper facilities for that.
2106 : */
2107 236 : if (slotname)
2108 150 : PreventInTransactionBlock(isTopLevel, "DROP SUBSCRIPTION");
2109 :
2110 230 : ObjectAddressSet(myself, SubscriptionRelationId, subid);
2111 230 : EventTriggerSQLDropAddObject(&myself, true, true);
2112 :
2113 : /* Remove the tuple from catalog. */
2114 230 : CatalogTupleDelete(rel, &tup->t_self);
2115 :
2116 230 : ReleaseSysCache(tup);
2117 :
2118 : /*
2119 : * Stop all the subscription workers immediately.
2120 : *
2121 : * This is necessary if we are dropping the replication slot, so that the
2122 : * slot becomes accessible.
2123 : *
2124 : * It is also necessary if the subscription is disabled and was disabled
2125 : * in the same transaction. Then the workers haven't seen the disabling
2126 : * yet and will still be running, leading to hangs later when we want to
2127 : * drop the replication origin. If the subscription was disabled before
2128 : * this transaction, then there shouldn't be any workers left, so this
2129 : * won't make a difference.
2130 : *
2131 : * New workers won't be started because we hold an exclusive lock on the
2132 : * subscription till the end of the transaction.
2133 : */
2134 230 : subworkers = logicalrep_workers_find(subid, false, true);
2135 378 : foreach(lc, subworkers)
2136 : {
2137 148 : LogicalRepWorker *w = (LogicalRepWorker *) lfirst(lc);
2138 :
2139 148 : logicalrep_worker_stop(w->type, w->subid, w->relid);
2140 : }
2141 230 : list_free(subworkers);
2142 :
2143 : /*
2144 : * Remove the no-longer-useful entry in the launcher's table of apply
2145 : * worker start times.
2146 : *
2147 : * If this transaction rolls back, the launcher might restart a failed
2148 : * apply worker before wal_retrieve_retry_interval milliseconds have
2149 : * elapsed, but that's pretty harmless.
2150 : */
2151 230 : ApplyLauncherForgetWorkerStartTime(subid);
2152 :
2153 : /*
2154 : * Cleanup of tablesync replication origins.
2155 : *
2156 : * Any READY-state relations would already have dealt with clean-ups.
2157 : *
2158 : * Note that the state can't change because we have already stopped both
2159 : * the apply and tablesync workers and they can't restart because of
2160 : * exclusive lock on the subscription.
2161 : */
2162 230 : rstates = GetSubscriptionRelations(subid, true, false, true);
2163 242 : foreach(lc, rstates)
2164 : {
2165 12 : SubscriptionRelState *rstate = (SubscriptionRelState *) lfirst(lc);
2166 12 : Oid relid = rstate->relid;
2167 :
2168 : /* Only cleanup resources of tablesync workers */
2169 12 : if (!OidIsValid(relid))
2170 0 : continue;
2171 :
2172 : /*
2173 : * Drop the tablesync's origin tracking if exists.
2174 : *
2175 : * It is possible that the origin is not yet created for tablesync
2176 : * worker so passing missing_ok = true. This can happen for the states
2177 : * before SUBREL_STATE_FINISHEDCOPY.
2178 : */
2179 12 : ReplicationOriginNameForLogicalRep(subid, relid, originname,
2180 : sizeof(originname));
2181 12 : replorigin_drop_by_name(originname, true, false);
2182 : }
2183 :
2184 : /* Clean up dependencies */
2185 230 : deleteSharedDependencyRecordsFor(SubscriptionRelationId, subid, 0);
2186 :
2187 : /* Remove any associated relation synchronization states. */
2188 230 : RemoveSubscriptionRel(subid, InvalidOid);
2189 :
2190 : /* Remove the origin tracking if exists. */
2191 230 : ReplicationOriginNameForLogicalRep(subid, InvalidOid, originname, sizeof(originname));
2192 230 : replorigin_drop_by_name(originname, true, false);
2193 :
2194 : /*
2195 : * Tell the cumulative stats system that the subscription is getting
2196 : * dropped.
2197 : */
2198 230 : pgstat_drop_subscription(subid);
2199 :
2200 : /*
2201 : * If there is no slot associated with the subscription, we can finish
2202 : * here.
2203 : */
2204 230 : if (!slotname && rstates == NIL)
2205 : {
2206 84 : table_close(rel, NoLock);
2207 84 : return;
2208 : }
2209 :
2210 : /*
2211 : * Try to acquire the connection necessary for dropping slots.
2212 : *
2213 : * Note: If the slotname is NONE/NULL then we allow the command to finish
2214 : * and users need to manually cleanup the apply and tablesync worker slots
2215 : * later.
2216 : *
2217 : * This has to be at the end because otherwise if there is an error while
2218 : * doing the database operations we won't be able to rollback dropped
2219 : * slot.
2220 : */
2221 146 : load_file("libpqwalreceiver", false);
2222 :
2223 146 : wrconn = walrcv_connect(conninfo, true, true, must_use_password,
2224 : subname, &err);
2225 146 : if (wrconn == NULL)
2226 : {
2227 0 : if (!slotname)
2228 : {
2229 : /* be tidy */
2230 0 : list_free(rstates);
2231 0 : table_close(rel, NoLock);
2232 0 : return;
2233 : }
2234 : else
2235 : {
2236 0 : ReportSlotConnectionError(rstates, subid, slotname, err);
2237 : }
2238 : }
2239 :
2240 146 : PG_TRY();
2241 : {
2242 158 : foreach(lc, rstates)
2243 : {
2244 12 : SubscriptionRelState *rstate = (SubscriptionRelState *) lfirst(lc);
2245 12 : Oid relid = rstate->relid;
2246 :
2247 : /* Only cleanup resources of tablesync workers */
2248 12 : if (!OidIsValid(relid))
2249 0 : continue;
2250 :
2251 : /*
2252 : * Drop the tablesync slots associated with removed tables.
2253 : *
2254 : * For SYNCDONE/READY states, the tablesync slot is known to have
2255 : * already been dropped by the tablesync worker.
2256 : *
2257 : * For other states, there is no certainty, maybe the slot does
2258 : * not exist yet. Also, if we fail after removing some of the
2259 : * slots, next time, it will again try to drop already dropped
2260 : * slots and fail. For these reasons, we allow missing_ok = true
2261 : * for the drop.
2262 : */
2263 12 : if (rstate->state != SUBREL_STATE_SYNCDONE)
2264 : {
2265 10 : char syncslotname[NAMEDATALEN] = {0};
2266 :
2267 10 : ReplicationSlotNameForTablesync(subid, relid, syncslotname,
2268 : sizeof(syncslotname));
2269 10 : ReplicationSlotDropAtPubNode(wrconn, syncslotname, true);
2270 : }
2271 : }
2272 :
2273 146 : list_free(rstates);
2274 :
2275 : /*
2276 : * If there is a slot associated with the subscription, then drop the
2277 : * replication slot at the publisher.
2278 : */
2279 146 : if (slotname)
2280 144 : ReplicationSlotDropAtPubNode(wrconn, slotname, false);
2281 : }
2282 2 : PG_FINALLY();
2283 : {
2284 146 : walrcv_disconnect(wrconn);
2285 : }
2286 146 : PG_END_TRY();
2287 :
2288 144 : table_close(rel, NoLock);
2289 : }
2290 :
2291 : /*
2292 : * Drop the replication slot at the publisher node using the replication
2293 : * connection.
2294 : *
2295 : * missing_ok - if true then only issue a LOG message if the slot doesn't
2296 : * exist.
2297 : */
2298 : void
2299 540 : ReplicationSlotDropAtPubNode(WalReceiverConn *wrconn, char *slotname, bool missing_ok)
2300 : {
2301 : StringInfoData cmd;
2302 :
2303 : Assert(wrconn);
2304 :
2305 540 : load_file("libpqwalreceiver", false);
2306 :
2307 540 : initStringInfo(&cmd);
2308 540 : appendStringInfo(&cmd, "DROP_REPLICATION_SLOT %s WAIT", quote_identifier(slotname));
2309 :
2310 540 : PG_TRY();
2311 : {
2312 : WalRcvExecResult *res;
2313 :
2314 540 : res = walrcv_exec(wrconn, cmd.data, 0, NULL);
2315 :
2316 540 : if (res->status == WALRCV_OK_COMMAND)
2317 : {
2318 : /* NOTICE. Success. */
2319 534 : ereport(NOTICE,
2320 : (errmsg("dropped replication slot \"%s\" on publisher",
2321 : slotname)));
2322 : }
2323 6 : else if (res->status == WALRCV_ERROR &&
2324 4 : missing_ok &&
2325 4 : res->sqlstate == ERRCODE_UNDEFINED_OBJECT)
2326 : {
2327 : /* LOG. Error, but missing_ok = true. */
2328 4 : ereport(LOG,
2329 : (errmsg("could not drop replication slot \"%s\" on publisher: %s",
2330 : slotname, res->err)));
2331 : }
2332 : else
2333 : {
2334 : /* ERROR. */
2335 2 : ereport(ERROR,
2336 : (errcode(ERRCODE_CONNECTION_FAILURE),
2337 : errmsg("could not drop replication slot \"%s\" on publisher: %s",
2338 : slotname, res->err)));
2339 : }
2340 :
2341 538 : walrcv_clear_result(res);
2342 : }
2343 2 : PG_FINALLY();
2344 : {
2345 540 : pfree(cmd.data);
2346 : }
2347 540 : PG_END_TRY();
2348 538 : }
2349 :
2350 : /*
2351 : * Internal workhorse for changing a subscription owner
2352 : */
2353 : static void
2354 18 : AlterSubscriptionOwner_internal(Relation rel, HeapTuple tup, Oid newOwnerId)
2355 : {
2356 : Form_pg_subscription form;
2357 : AclResult aclresult;
2358 :
2359 18 : form = (Form_pg_subscription) GETSTRUCT(tup);
2360 :
2361 18 : if (form->subowner == newOwnerId)
2362 4 : return;
2363 :
2364 14 : if (!object_ownercheck(SubscriptionRelationId, form->oid, GetUserId()))
2365 0 : aclcheck_error(ACLCHECK_NOT_OWNER, OBJECT_SUBSCRIPTION,
2366 0 : NameStr(form->subname));
2367 :
2368 : /*
2369 : * Don't allow non-superuser modification of a subscription with
2370 : * password_required=false.
2371 : */
2372 14 : if (!form->subpasswordrequired && !superuser())
2373 0 : ereport(ERROR,
2374 : (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
2375 : errmsg("password_required=false is superuser-only"),
2376 : errhint("Subscriptions with the password_required option set to false may only be created or modified by the superuser.")));
2377 :
2378 : /* Must be able to become new owner */
2379 14 : check_can_set_role(GetUserId(), newOwnerId);
2380 :
2381 : /*
2382 : * current owner must have CREATE on database
2383 : *
2384 : * This is consistent with how ALTER SCHEMA ... OWNER TO works, but some
2385 : * other object types behave differently (e.g. you can't give a table to a
2386 : * user who lacks CREATE privileges on a schema).
2387 : */
2388 8 : aclresult = object_aclcheck(DatabaseRelationId, MyDatabaseId,
2389 : GetUserId(), ACL_CREATE);
2390 8 : if (aclresult != ACLCHECK_OK)
2391 0 : aclcheck_error(aclresult, OBJECT_DATABASE,
2392 0 : get_database_name(MyDatabaseId));
2393 :
2394 8 : form->subowner = newOwnerId;
2395 8 : CatalogTupleUpdate(rel, &tup->t_self, tup);
2396 :
2397 : /* Update owner dependency reference */
2398 8 : changeDependencyOnOwner(SubscriptionRelationId,
2399 : form->oid,
2400 : newOwnerId);
2401 :
2402 8 : InvokeObjectPostAlterHook(SubscriptionRelationId,
2403 : form->oid, 0);
2404 :
2405 : /* Wake up related background processes to handle this change quickly. */
2406 8 : ApplyLauncherWakeupAtCommit();
2407 8 : LogicalRepWorkersWakeupAtCommit(form->oid);
2408 : }
2409 :
2410 : /*
2411 : * Change subscription owner -- by name
2412 : */
2413 : ObjectAddress
2414 18 : AlterSubscriptionOwner(const char *name, Oid newOwnerId)
2415 : {
2416 : Oid subid;
2417 : HeapTuple tup;
2418 : Relation rel;
2419 : ObjectAddress address;
2420 : Form_pg_subscription form;
2421 :
2422 18 : rel = table_open(SubscriptionRelationId, RowExclusiveLock);
2423 :
2424 18 : tup = SearchSysCacheCopy2(SUBSCRIPTIONNAME, ObjectIdGetDatum(MyDatabaseId),
2425 : CStringGetDatum(name));
2426 :
2427 18 : if (!HeapTupleIsValid(tup))
2428 0 : ereport(ERROR,
2429 : (errcode(ERRCODE_UNDEFINED_OBJECT),
2430 : errmsg("subscription \"%s\" does not exist", name)));
2431 :
2432 18 : form = (Form_pg_subscription) GETSTRUCT(tup);
2433 18 : subid = form->oid;
2434 :
2435 18 : AlterSubscriptionOwner_internal(rel, tup, newOwnerId);
2436 :
2437 12 : ObjectAddressSet(address, SubscriptionRelationId, subid);
2438 :
2439 12 : heap_freetuple(tup);
2440 :
2441 12 : table_close(rel, RowExclusiveLock);
2442 :
2443 12 : return address;
2444 : }
2445 :
2446 : /*
2447 : * Change subscription owner -- by OID
2448 : */
2449 : void
2450 0 : AlterSubscriptionOwner_oid(Oid subid, Oid newOwnerId)
2451 : {
2452 : HeapTuple tup;
2453 : Relation rel;
2454 :
2455 0 : rel = table_open(SubscriptionRelationId, RowExclusiveLock);
2456 :
2457 0 : tup = SearchSysCacheCopy1(SUBSCRIPTIONOID, ObjectIdGetDatum(subid));
2458 :
2459 0 : if (!HeapTupleIsValid(tup))
2460 0 : ereport(ERROR,
2461 : (errcode(ERRCODE_UNDEFINED_OBJECT),
2462 : errmsg("subscription with OID %u does not exist", subid)));
2463 :
2464 0 : AlterSubscriptionOwner_internal(rel, tup, newOwnerId);
2465 :
2466 0 : heap_freetuple(tup);
2467 :
2468 0 : table_close(rel, RowExclusiveLock);
2469 0 : }
2470 :
2471 : /*
2472 : * Check and log a warning if the publisher has subscribed to the same table,
2473 : * its partition ancestors (if it's a partition), or its partition children (if
2474 : * it's a partitioned table), from some other publishers. This check is
2475 : * required in the following scenarios:
2476 : *
2477 : * 1) For CREATE SUBSCRIPTION and ALTER SUBSCRIPTION ... REFRESH PUBLICATION
2478 : * statements with "copy_data = true" and "origin = none":
2479 : * - Warn the user that data with an origin might have been copied.
2480 : * - This check is skipped for tables already added, as incremental sync via
2481 : * WAL allows origin tracking. The list of such tables is in
2482 : * subrel_local_oids.
2483 : *
2484 : * 2) For CREATE SUBSCRIPTION and ALTER SUBSCRIPTION ... REFRESH PUBLICATION
2485 : * statements with "retain_dead_tuples = true" and "origin = any", and for
2486 : * ALTER SUBSCRIPTION statements that modify retain_dead_tuples or origin,
2487 : * or when the publisher's status changes (e.g., due to a connection string
2488 : * update):
2489 : * - Warn the user that only conflict detection info for local changes on
2490 : * the publisher is retained. Data from other origins may lack sufficient
2491 : * details for reliable conflict detection.
2492 : * - See comments atop worker.c for more details.
2493 : */
2494 : static void
2495 338 : check_publications_origin_tables(WalReceiverConn *wrconn, List *publications,
2496 : bool copydata, bool retain_dead_tuples,
2497 : char *origin, Oid *subrel_local_oids,
2498 : int subrel_count, char *subname)
2499 : {
2500 : WalRcvExecResult *res;
2501 : StringInfoData cmd;
2502 : TupleTableSlot *slot;
2503 338 : Oid tableRow[1] = {TEXTOID};
2504 338 : List *publist = NIL;
2505 : int i;
2506 : bool check_rdt;
2507 : bool check_table_sync;
2508 676 : bool origin_none = origin &&
2509 338 : pg_strcasecmp(origin, LOGICALREP_ORIGIN_NONE) == 0;
2510 :
2511 : /*
2512 : * Enable retain_dead_tuples checks only when origin is set to 'any',
2513 : * since with origin='none' only local changes are replicated to the
2514 : * subscriber.
2515 : */
2516 338 : check_rdt = retain_dead_tuples && !origin_none;
2517 :
2518 : /*
2519 : * Enable table synchronization checks only when origin is 'none', to
2520 : * ensure that data from other origins is not inadvertently copied.
2521 : */
2522 338 : check_table_sync = copydata && origin_none;
2523 :
2524 : /* retain_dead_tuples and table sync checks occur separately */
2525 : Assert(!(check_rdt && check_table_sync));
2526 :
2527 : /* Return if no checks are required */
2528 338 : if (!check_rdt && !check_table_sync)
2529 310 : return;
2530 :
2531 28 : initStringInfo(&cmd);
2532 28 : appendStringInfoString(&cmd,
2533 : "SELECT DISTINCT P.pubname AS pubname\n"
2534 : "FROM pg_publication P,\n"
2535 : " LATERAL pg_get_publication_tables(P.pubname) GPT\n"
2536 : " JOIN pg_subscription_rel PS ON (GPT.relid = PS.srrelid OR"
2537 : " GPT.relid IN (SELECT relid FROM pg_partition_ancestors(PS.srrelid) UNION"
2538 : " SELECT relid FROM pg_partition_tree(PS.srrelid))),\n"
2539 : " pg_class C JOIN pg_namespace N ON (N.oid = C.relnamespace)\n"
2540 : "WHERE C.oid = GPT.relid AND P.pubname IN (");
2541 28 : GetPublicationsStr(publications, &cmd, true);
2542 28 : appendStringInfoString(&cmd, ")\n");
2543 :
2544 : /*
2545 : * In case of ALTER SUBSCRIPTION ... REFRESH PUBLICATION,
2546 : * subrel_local_oids contains the list of relation oids that are already
2547 : * present on the subscriber. This check should be skipped for these
2548 : * tables if checking for table sync scenario. However, when handling the
2549 : * retain_dead_tuples scenario, ensure all tables are checked, as some
2550 : * existing tables may now include changes from other origins due to newly
2551 : * created subscriptions on the publisher.
2552 : */
2553 28 : if (check_table_sync)
2554 : {
2555 28 : for (i = 0; i < subrel_count; i++)
2556 : {
2557 8 : Oid relid = subrel_local_oids[i];
2558 8 : char *schemaname = get_namespace_name(get_rel_namespace(relid));
2559 8 : char *tablename = get_rel_name(relid);
2560 :
2561 8 : appendStringInfo(&cmd, "AND NOT (N.nspname = '%s' AND C.relname = '%s')\n",
2562 : schemaname, tablename);
2563 : }
2564 : }
2565 :
2566 28 : res = walrcv_exec(wrconn, cmd.data, 1, tableRow);
2567 28 : pfree(cmd.data);
2568 :
2569 28 : if (res->status != WALRCV_OK_TUPLES)
2570 0 : ereport(ERROR,
2571 : (errcode(ERRCODE_CONNECTION_FAILURE),
2572 : errmsg("could not receive list of replicated tables from the publisher: %s",
2573 : res->err)));
2574 :
2575 : /* Process publications. */
2576 28 : slot = MakeSingleTupleTableSlot(res->tupledesc, &TTSOpsMinimalTuple);
2577 38 : while (tuplestore_gettupleslot(res->tuplestore, true, false, slot))
2578 : {
2579 : char *pubname;
2580 : bool isnull;
2581 :
2582 10 : pubname = TextDatumGetCString(slot_getattr(slot, 1, &isnull));
2583 : Assert(!isnull);
2584 :
2585 10 : ExecClearTuple(slot);
2586 10 : publist = list_append_unique(publist, makeString(pubname));
2587 : }
2588 :
2589 : /*
2590 : * Log a warning if the publisher has subscribed to the same table from
2591 : * some other publisher. We cannot know the origin of data during the
2592 : * initial sync. Data origins can be found only from the WAL by looking at
2593 : * the origin id.
2594 : *
2595 : * XXX: For simplicity, we don't check whether the table has any data or
2596 : * not. If the table doesn't have any data then we don't need to
2597 : * distinguish between data having origin and data not having origin so we
2598 : * can avoid logging a warning for table sync scenario.
2599 : */
2600 28 : if (publist)
2601 : {
2602 : StringInfoData pubnames;
2603 :
2604 : /* Prepare the list of publication(s) for warning message. */
2605 10 : initStringInfo(&pubnames);
2606 10 : GetPublicationsStr(publist, &pubnames, false);
2607 :
2608 10 : if (check_table_sync)
2609 8 : ereport(WARNING,
2610 : errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
2611 : errmsg("subscription \"%s\" requested copy_data with origin = NONE but might copy data that had a different origin",
2612 : subname),
2613 : errdetail_plural("The subscription subscribes to a publication (%s) that contains tables that are written to by other subscriptions.",
2614 : "The subscription subscribes to publications (%s) that contain tables that are written to by other subscriptions.",
2615 : list_length(publist), pubnames.data),
2616 : errhint("Verify that initial data copied from the publisher tables did not come from other origins."));
2617 : else
2618 2 : ereport(WARNING,
2619 : errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
2620 : errmsg("subscription \"%s\" enabled retain_dead_tuples but might not reliably detect conflicts for changes from different origins",
2621 : subname),
2622 : errdetail_plural("The subscription subscribes to a publication (%s) that contains tables that are written to by other subscriptions.",
2623 : "The subscription subscribes to publications (%s) that contain tables that are written to by other subscriptions.",
2624 : list_length(publist), pubnames.data),
2625 : errhint("Consider using origin = NONE or disabling retain_dead_tuples."));
2626 : }
2627 :
2628 28 : ExecDropSingleTupleTableSlot(slot);
2629 :
2630 28 : walrcv_clear_result(res);
2631 : }
2632 :
2633 : /*
2634 : * This function is similar to check_publications_origin_tables and serves
2635 : * same purpose for sequences.
2636 : */
2637 : static void
2638 314 : check_publications_origin_sequences(WalReceiverConn *wrconn, List *publications,
2639 : bool copydata, char *origin,
2640 : Oid *subrel_local_oids, int subrel_count,
2641 : char *subname)
2642 : {
2643 : WalRcvExecResult *res;
2644 : StringInfoData cmd;
2645 : TupleTableSlot *slot;
2646 314 : Oid tableRow[1] = {TEXTOID};
2647 314 : List *publist = NIL;
2648 :
2649 : /*
2650 : * Enable sequence synchronization checks only when origin is 'none' , to
2651 : * ensure that sequence data from other origins is not inadvertently
2652 : * copied.
2653 : */
2654 314 : if (!copydata || pg_strcasecmp(origin, LOGICALREP_ORIGIN_NONE) != 0)
2655 294 : return;
2656 :
2657 20 : initStringInfo(&cmd);
2658 20 : appendStringInfoString(&cmd,
2659 : "SELECT DISTINCT P.pubname AS pubname\n"
2660 : "FROM pg_publication P,\n"
2661 : " LATERAL pg_get_publication_sequences(P.pubname) GPS\n"
2662 : " JOIN pg_subscription_rel PS ON (GPS.relid = PS.srrelid),\n"
2663 : " pg_class C JOIN pg_namespace N ON (N.oid = C.relnamespace)\n"
2664 : "WHERE C.oid = GPS.relid AND P.pubname IN (");
2665 :
2666 20 : GetPublicationsStr(publications, &cmd, true);
2667 20 : appendStringInfoString(&cmd, ")\n");
2668 :
2669 : /*
2670 : * In case of ALTER SUBSCRIPTION ... REFRESH PUBLICATION,
2671 : * subrel_local_oids contains the list of relations that are already
2672 : * present on the subscriber. This check should be skipped as these will
2673 : * not be re-synced.
2674 : */
2675 20 : for (int i = 0; i < subrel_count; i++)
2676 : {
2677 0 : Oid relid = subrel_local_oids[i];
2678 0 : char *schemaname = get_namespace_name(get_rel_namespace(relid));
2679 0 : char *seqname = get_rel_name(relid);
2680 :
2681 0 : appendStringInfo(&cmd,
2682 : "AND NOT (N.nspname = '%s' AND C.relname = '%s')\n",
2683 : schemaname, seqname);
2684 : }
2685 :
2686 20 : res = walrcv_exec(wrconn, cmd.data, 1, tableRow);
2687 20 : pfree(cmd.data);
2688 :
2689 20 : if (res->status != WALRCV_OK_TUPLES)
2690 0 : ereport(ERROR,
2691 : (errcode(ERRCODE_CONNECTION_FAILURE),
2692 : errmsg("could not receive list of replicated sequences from the publisher: %s",
2693 : res->err)));
2694 :
2695 : /* Process publications. */
2696 20 : slot = MakeSingleTupleTableSlot(res->tupledesc, &TTSOpsMinimalTuple);
2697 20 : while (tuplestore_gettupleslot(res->tuplestore, true, false, slot))
2698 : {
2699 : char *pubname;
2700 : bool isnull;
2701 :
2702 0 : pubname = TextDatumGetCString(slot_getattr(slot, 1, &isnull));
2703 : Assert(!isnull);
2704 :
2705 0 : ExecClearTuple(slot);
2706 0 : publist = list_append_unique(publist, makeString(pubname));
2707 : }
2708 :
2709 : /*
2710 : * Log a warning if the publisher has subscribed to the same sequence from
2711 : * some other publisher. We cannot know the origin of sequences data
2712 : * during the initial sync.
2713 : */
2714 20 : if (publist)
2715 : {
2716 : StringInfoData pubnames;
2717 :
2718 : /* Prepare the list of publication(s) for warning message. */
2719 0 : initStringInfo(&pubnames);
2720 0 : GetPublicationsStr(publist, &pubnames, false);
2721 :
2722 0 : ereport(WARNING,
2723 : errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
2724 : errmsg("subscription \"%s\" requested copy_data with origin = NONE but might copy data that had a different origin",
2725 : subname),
2726 : errdetail_plural("The subscription subscribes to a publication (%s) that contains sequences that are written to by other subscriptions.",
2727 : "The subscription subscribes to publications (%s) that contain sequences that are written to by other subscriptions.",
2728 : list_length(publist), pubnames.data),
2729 : errhint("Verify that initial data copied from the publisher sequences did not come from other origins."));
2730 : }
2731 :
2732 20 : ExecDropSingleTupleTableSlot(slot);
2733 :
2734 20 : walrcv_clear_result(res);
2735 : }
2736 :
2737 : /*
2738 : * Determine whether the retain_dead_tuples can be enabled based on the
2739 : * publisher's status.
2740 : *
2741 : * This option is disallowed if the publisher is running a version earlier
2742 : * than the PG19, or if the publisher is in recovery (i.e., it is a standby
2743 : * server).
2744 : *
2745 : * See comments atop worker.c for a detailed explanation.
2746 : */
2747 : static void
2748 24 : check_pub_dead_tuple_retention(WalReceiverConn *wrconn)
2749 : {
2750 : WalRcvExecResult *res;
2751 24 : Oid RecoveryRow[1] = {BOOLOID};
2752 : TupleTableSlot *slot;
2753 : bool isnull;
2754 : bool remote_in_recovery;
2755 :
2756 24 : if (walrcv_server_version(wrconn) < 19000)
2757 0 : ereport(ERROR,
2758 : errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
2759 : errmsg("cannot enable retain_dead_tuples if the publisher is running a version earlier than PostgreSQL 19"));
2760 :
2761 24 : res = walrcv_exec(wrconn, "SELECT pg_is_in_recovery()", 1, RecoveryRow);
2762 :
2763 24 : if (res->status != WALRCV_OK_TUPLES)
2764 0 : ereport(ERROR,
2765 : (errcode(ERRCODE_CONNECTION_FAILURE),
2766 : errmsg("could not obtain recovery progress from the publisher: %s",
2767 : res->err)));
2768 :
2769 24 : slot = MakeSingleTupleTableSlot(res->tupledesc, &TTSOpsMinimalTuple);
2770 24 : if (!tuplestore_gettupleslot(res->tuplestore, true, false, slot))
2771 0 : elog(ERROR, "failed to fetch tuple for the recovery progress");
2772 :
2773 24 : remote_in_recovery = DatumGetBool(slot_getattr(slot, 1, &isnull));
2774 :
2775 24 : if (remote_in_recovery)
2776 0 : ereport(ERROR,
2777 : errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
2778 : errmsg("cannot enable retain_dead_tuples if the publisher is in recovery."));
2779 :
2780 24 : ExecDropSingleTupleTableSlot(slot);
2781 :
2782 24 : walrcv_clear_result(res);
2783 24 : }
2784 :
2785 : /*
2786 : * Check if the subscriber's configuration is adequate to enable the
2787 : * retain_dead_tuples option.
2788 : *
2789 : * Issue an ERROR if the wal_level does not support the use of replication
2790 : * slots when check_guc is set to true.
2791 : *
2792 : * Issue a WARNING if track_commit_timestamp is not enabled when check_guc is
2793 : * set to true. This is only to highlight the importance of enabling
2794 : * track_commit_timestamp instead of catching all the misconfigurations, as
2795 : * this setting can be adjusted after subscription creation. Without it, the
2796 : * apply worker will simply skip conflict detection.
2797 : *
2798 : * Issue a WARNING or NOTICE if the subscription is disabled and the retention
2799 : * is active. Do not raise an ERROR since users can only modify
2800 : * retain_dead_tuples for disabled subscriptions. And as long as the
2801 : * subscription is enabled promptly, it will not pose issues.
2802 : *
2803 : * Issue a NOTICE to inform users that max_retention_duration is
2804 : * ineffective when retain_dead_tuples is disabled for a subscription. An ERROR
2805 : * is not issued because setting max_retention_duration causes no harm,
2806 : * even when it is ineffective.
2807 : */
2808 : void
2809 480 : CheckSubDeadTupleRetention(bool check_guc, bool sub_disabled,
2810 : int elevel_for_sub_disabled,
2811 : bool retain_dead_tuples, bool retention_active,
2812 : bool max_retention_set)
2813 : {
2814 : Assert(elevel_for_sub_disabled == NOTICE ||
2815 : elevel_for_sub_disabled == WARNING);
2816 :
2817 480 : if (retain_dead_tuples)
2818 : {
2819 34 : if (check_guc && wal_level < WAL_LEVEL_REPLICA)
2820 0 : ereport(ERROR,
2821 : errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
2822 : errmsg("\"wal_level\" is insufficient to create the replication slot required by retain_dead_tuples"),
2823 : errhint("\"wal_level\" must be set to \"replica\" or \"logical\" at server start."));
2824 :
2825 34 : if (check_guc && !track_commit_timestamp)
2826 8 : ereport(WARNING,
2827 : errcode(ERRCODE_INVALID_PARAMETER_VALUE),
2828 : errmsg("commit timestamp and origin data required for detecting conflicts won't be retained"),
2829 : errhint("Consider setting \"%s\" to true.",
2830 : "track_commit_timestamp"));
2831 :
2832 34 : if (sub_disabled && retention_active)
2833 14 : ereport(elevel_for_sub_disabled,
2834 : errcode(ERRCODE_INVALID_PARAMETER_VALUE),
2835 : errmsg("deleted rows to detect conflicts would not be removed until the subscription is enabled"),
2836 : (elevel_for_sub_disabled > NOTICE)
2837 : ? errhint("Consider setting %s to false.",
2838 : "retain_dead_tuples") : 0);
2839 : }
2840 446 : else if (max_retention_set)
2841 : {
2842 6 : ereport(NOTICE,
2843 : errcode(ERRCODE_INVALID_PARAMETER_VALUE),
2844 : errmsg("max_retention_duration is ineffective when retain_dead_tuples is disabled"));
2845 : }
2846 480 : }
2847 :
2848 : /*
2849 : * Return true iff 'rv' is a member of the list.
2850 : */
2851 : static bool
2852 544 : list_member_rangevar(const List *list, RangeVar *rv)
2853 : {
2854 2000 : foreach_ptr(PublicationRelKind, relinfo, list)
2855 : {
2856 916 : if (equal(relinfo->rv, rv))
2857 2 : return true;
2858 : }
2859 :
2860 542 : return false;
2861 : }
2862 :
2863 : /*
2864 : * Get the list of tables and sequences which belong to specified publications
2865 : * on the publisher connection.
2866 : *
2867 : * Note that we don't support the case where the column list is different for
2868 : * the same table in different publications to avoid sending unwanted column
2869 : * information for some of the rows. This can happen when both the column
2870 : * list and row filter are specified for different publications.
2871 : */
2872 : static List *
2873 312 : fetch_relation_list(WalReceiverConn *wrconn, List *publications)
2874 : {
2875 : WalRcvExecResult *res;
2876 : StringInfoData cmd;
2877 : TupleTableSlot *slot;
2878 312 : Oid tableRow[4] = {TEXTOID, TEXTOID, CHAROID, InvalidOid};
2879 312 : List *relationlist = NIL;
2880 312 : int server_version = walrcv_server_version(wrconn);
2881 312 : bool check_columnlist = (server_version >= 150000);
2882 312 : int column_count = check_columnlist ? 4 : 3;
2883 : StringInfoData pub_names;
2884 :
2885 312 : initStringInfo(&cmd);
2886 312 : initStringInfo(&pub_names);
2887 :
2888 : /* Build the pub_names comma-separated string. */
2889 312 : GetPublicationsStr(publications, &pub_names, true);
2890 :
2891 : /* Get the list of relations from the publisher */
2892 312 : if (server_version >= 160000)
2893 : {
2894 312 : tableRow[3] = INT2VECTOROID;
2895 :
2896 : /*
2897 : * From version 16, we allowed passing multiple publications to the
2898 : * function pg_get_publication_tables. This helped to filter out the
2899 : * partition table whose ancestor is also published in this
2900 : * publication array.
2901 : *
2902 : * Join pg_get_publication_tables with pg_publication to exclude
2903 : * non-existing publications.
2904 : *
2905 : * Note that attrs are always stored in sorted order so we don't need
2906 : * to worry if different publications have specified them in a
2907 : * different order. See pub_collist_validate.
2908 : */
2909 312 : appendStringInfo(&cmd, "SELECT DISTINCT n.nspname, c.relname, c.relkind, gpt.attrs\n"
2910 : " FROM pg_class c\n"
2911 : " JOIN pg_namespace n ON n.oid = c.relnamespace\n"
2912 : " JOIN ( SELECT (pg_get_publication_tables(VARIADIC array_agg(pubname::text))).*\n"
2913 : " FROM pg_publication\n"
2914 : " WHERE pubname IN ( %s )) AS gpt\n"
2915 : " ON gpt.relid = c.oid\n",
2916 : pub_names.data);
2917 :
2918 : /* From version 19, inclusion of sequences in the target is supported */
2919 312 : if (server_version >= 190000)
2920 312 : appendStringInfo(&cmd,
2921 : "UNION ALL\n"
2922 : " SELECT DISTINCT s.schemaname, s.sequencename, " CppAsString2(RELKIND_SEQUENCE) "::\"char\" AS relkind, NULL::int2vector AS attrs\n"
2923 : " FROM pg_catalog.pg_publication_sequences s\n"
2924 : " WHERE s.pubname IN ( %s )",
2925 : pub_names.data);
2926 : }
2927 : else
2928 : {
2929 0 : tableRow[3] = NAMEARRAYOID;
2930 0 : appendStringInfoString(&cmd, "SELECT DISTINCT t.schemaname, t.tablename, " CppAsString2(RELKIND_RELATION) "::\"char\" AS relkind \n");
2931 :
2932 : /* Get column lists for each relation if the publisher supports it */
2933 0 : if (check_columnlist)
2934 0 : appendStringInfoString(&cmd, ", t.attnames\n");
2935 :
2936 0 : appendStringInfo(&cmd, "FROM pg_catalog.pg_publication_tables t\n"
2937 : " WHERE t.pubname IN ( %s )",
2938 : pub_names.data);
2939 : }
2940 :
2941 312 : pfree(pub_names.data);
2942 :
2943 312 : res = walrcv_exec(wrconn, cmd.data, column_count, tableRow);
2944 312 : pfree(cmd.data);
2945 :
2946 312 : if (res->status != WALRCV_OK_TUPLES)
2947 0 : ereport(ERROR,
2948 : (errcode(ERRCODE_CONNECTION_FAILURE),
2949 : errmsg("could not receive list of replicated tables from the publisher: %s",
2950 : res->err)));
2951 :
2952 : /* Process tables. */
2953 312 : slot = MakeSingleTupleTableSlot(res->tupledesc, &TTSOpsMinimalTuple);
2954 888 : while (tuplestore_gettupleslot(res->tuplestore, true, false, slot))
2955 : {
2956 : char *nspname;
2957 : char *relname;
2958 : bool isnull;
2959 : char relkind;
2960 578 : PublicationRelKind *relinfo = palloc_object(PublicationRelKind);
2961 :
2962 578 : nspname = TextDatumGetCString(slot_getattr(slot, 1, &isnull));
2963 : Assert(!isnull);
2964 578 : relname = TextDatumGetCString(slot_getattr(slot, 2, &isnull));
2965 : Assert(!isnull);
2966 578 : relkind = DatumGetChar(slot_getattr(slot, 3, &isnull));
2967 : Assert(!isnull);
2968 :
2969 578 : relinfo->rv = makeRangeVar(nspname, relname, -1);
2970 578 : relinfo->relkind = relkind;
2971 :
2972 578 : if (relkind != RELKIND_SEQUENCE &&
2973 544 : check_columnlist &&
2974 544 : list_member_rangevar(relationlist, relinfo->rv))
2975 2 : ereport(ERROR,
2976 : errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
2977 : errmsg("cannot use different column lists for table \"%s.%s\" in different publications",
2978 : nspname, relname));
2979 : else
2980 576 : relationlist = lappend(relationlist, relinfo);
2981 :
2982 576 : ExecClearTuple(slot);
2983 : }
2984 310 : ExecDropSingleTupleTableSlot(slot);
2985 :
2986 310 : walrcv_clear_result(res);
2987 :
2988 310 : return relationlist;
2989 : }
2990 :
2991 : /*
2992 : * This is to report the connection failure while dropping replication slots.
2993 : * Here, we report the WARNING for all tablesync slots so that user can drop
2994 : * them manually, if required.
2995 : */
2996 : static void
2997 0 : ReportSlotConnectionError(List *rstates, Oid subid, char *slotname, char *err)
2998 : {
2999 : ListCell *lc;
3000 :
3001 0 : foreach(lc, rstates)
3002 : {
3003 0 : SubscriptionRelState *rstate = (SubscriptionRelState *) lfirst(lc);
3004 0 : Oid relid = rstate->relid;
3005 :
3006 : /* Only cleanup resources of tablesync workers */
3007 0 : if (!OidIsValid(relid))
3008 0 : continue;
3009 :
3010 : /*
3011 : * Caller needs to ensure that relstate doesn't change underneath us.
3012 : * See DropSubscription where we get the relstates.
3013 : */
3014 0 : if (rstate->state != SUBREL_STATE_SYNCDONE)
3015 : {
3016 0 : char syncslotname[NAMEDATALEN] = {0};
3017 :
3018 0 : ReplicationSlotNameForTablesync(subid, relid, syncslotname,
3019 : sizeof(syncslotname));
3020 0 : elog(WARNING, "could not drop tablesync replication slot \"%s\"",
3021 : syncslotname);
3022 : }
3023 : }
3024 :
3025 0 : ereport(ERROR,
3026 : (errcode(ERRCODE_CONNECTION_FAILURE),
3027 : errmsg("could not connect to publisher when attempting to drop replication slot \"%s\": %s",
3028 : slotname, err),
3029 : /* translator: %s is an SQL ALTER command */
3030 : errhint("Use %s to disable the subscription, and then use %s to disassociate it from the slot.",
3031 : "ALTER SUBSCRIPTION ... DISABLE",
3032 : "ALTER SUBSCRIPTION ... SET (slot_name = NONE)")));
3033 : }
3034 :
3035 : /*
3036 : * Check for duplicates in the given list of publications and error out if
3037 : * found one. Add publications to datums as text datums, if datums is not
3038 : * NULL.
3039 : */
3040 : static void
3041 448 : check_duplicates_in_publist(List *publist, Datum *datums)
3042 : {
3043 : ListCell *cell;
3044 448 : int j = 0;
3045 :
3046 1024 : foreach(cell, publist)
3047 : {
3048 594 : char *name = strVal(lfirst(cell));
3049 : ListCell *pcell;
3050 :
3051 896 : foreach(pcell, publist)
3052 : {
3053 896 : char *pname = strVal(lfirst(pcell));
3054 :
3055 896 : if (pcell == cell)
3056 576 : break;
3057 :
3058 320 : if (strcmp(name, pname) == 0)
3059 18 : ereport(ERROR,
3060 : (errcode(ERRCODE_DUPLICATE_OBJECT),
3061 : errmsg("publication name \"%s\" used more than once",
3062 : pname)));
3063 : }
3064 :
3065 576 : if (datums)
3066 490 : datums[j++] = CStringGetTextDatum(name);
3067 : }
3068 430 : }
3069 :
3070 : /*
3071 : * Merge current subscription's publications and user-specified publications
3072 : * from ADD/DROP PUBLICATIONS.
3073 : *
3074 : * If addpub is true, we will add the list of publications into oldpublist.
3075 : * Otherwise, we will delete the list of publications from oldpublist. The
3076 : * returned list is a copy, oldpublist itself is not changed.
3077 : *
3078 : * subname is the subscription name, for error messages.
3079 : */
3080 : static List *
3081 54 : merge_publications(List *oldpublist, List *newpublist, bool addpub, const char *subname)
3082 : {
3083 : ListCell *lc;
3084 :
3085 54 : oldpublist = list_copy(oldpublist);
3086 :
3087 54 : check_duplicates_in_publist(newpublist, NULL);
3088 :
3089 92 : foreach(lc, newpublist)
3090 : {
3091 68 : char *name = strVal(lfirst(lc));
3092 : ListCell *lc2;
3093 68 : bool found = false;
3094 :
3095 134 : foreach(lc2, oldpublist)
3096 : {
3097 110 : char *pubname = strVal(lfirst(lc2));
3098 :
3099 110 : if (strcmp(name, pubname) == 0)
3100 : {
3101 44 : found = true;
3102 44 : if (addpub)
3103 12 : ereport(ERROR,
3104 : (errcode(ERRCODE_DUPLICATE_OBJECT),
3105 : errmsg("publication \"%s\" is already in subscription \"%s\"",
3106 : name, subname)));
3107 : else
3108 32 : oldpublist = foreach_delete_current(oldpublist, lc2);
3109 :
3110 32 : break;
3111 : }
3112 : }
3113 :
3114 56 : if (addpub && !found)
3115 18 : oldpublist = lappend(oldpublist, makeString(name));
3116 38 : else if (!addpub && !found)
3117 6 : ereport(ERROR,
3118 : (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
3119 : errmsg("publication \"%s\" is not in subscription \"%s\"",
3120 : name, subname)));
3121 : }
3122 :
3123 : /*
3124 : * XXX Probably no strong reason for this, but for now it's to make ALTER
3125 : * SUBSCRIPTION ... DROP PUBLICATION consistent with SET PUBLICATION.
3126 : */
3127 24 : if (!oldpublist)
3128 6 : ereport(ERROR,
3129 : (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
3130 : errmsg("cannot drop all the publications from a subscription")));
3131 :
3132 18 : return oldpublist;
3133 : }
3134 :
3135 : /*
3136 : * Extract the streaming mode value from a DefElem. This is like
3137 : * defGetBoolean() but also accepts the special value of "parallel".
3138 : */
3139 : char
3140 854 : defGetStreamingMode(DefElem *def)
3141 : {
3142 : /*
3143 : * If no parameter value given, assume "true" is meant.
3144 : */
3145 854 : if (!def->arg)
3146 0 : return LOGICALREP_STREAM_ON;
3147 :
3148 : /*
3149 : * Allow 0, 1, "false", "true", "off", "on" or "parallel".
3150 : */
3151 854 : switch (nodeTag(def->arg))
3152 : {
3153 0 : case T_Integer:
3154 0 : switch (intVal(def->arg))
3155 : {
3156 0 : case 0:
3157 0 : return LOGICALREP_STREAM_OFF;
3158 0 : case 1:
3159 0 : return LOGICALREP_STREAM_ON;
3160 0 : default:
3161 : /* otherwise, error out below */
3162 0 : break;
3163 : }
3164 0 : break;
3165 854 : default:
3166 : {
3167 854 : char *sval = defGetString(def);
3168 :
3169 : /*
3170 : * The set of strings accepted here should match up with the
3171 : * grammar's opt_boolean_or_string production.
3172 : */
3173 1702 : if (pg_strcasecmp(sval, "false") == 0 ||
3174 848 : pg_strcasecmp(sval, "off") == 0)
3175 12 : return LOGICALREP_STREAM_OFF;
3176 1666 : if (pg_strcasecmp(sval, "true") == 0 ||
3177 824 : pg_strcasecmp(sval, "on") == 0)
3178 88 : return LOGICALREP_STREAM_ON;
3179 754 : if (pg_strcasecmp(sval, "parallel") == 0)
3180 748 : return LOGICALREP_STREAM_PARALLEL;
3181 : }
3182 6 : break;
3183 : }
3184 :
3185 6 : ereport(ERROR,
3186 : (errcode(ERRCODE_SYNTAX_ERROR),
3187 : errmsg("%s requires a Boolean value or \"parallel\"",
3188 : def->defname)));
3189 : return LOGICALREP_STREAM_OFF; /* keep compiler quiet */
3190 : }
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