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subscriptioncmds.c
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1 /*-------------------------------------------------------------------------
2  *
3  * subscriptioncmds.c
4  * subscription catalog manipulation functions
5  *
6  * Portions Copyright (c) 1996-2024, PostgreSQL Global Development Group
7  * Portions Copyright (c) 1994, Regents of the University of California
8  *
9  * IDENTIFICATION
10  * src/backend/commands/subscriptioncmds.c
11  *
12  *-------------------------------------------------------------------------
13  */
14 
15 #include "postgres.h"
16 
17 #include "access/htup_details.h"
18 #include "access/table.h"
19 #include "access/xact.h"
20 #include "catalog/catalog.h"
21 #include "catalog/dependency.h"
22 #include "catalog/indexing.h"
23 #include "catalog/namespace.h"
24 #include "catalog/objectaccess.h"
25 #include "catalog/objectaddress.h"
26 #include "catalog/pg_authid_d.h"
27 #include "catalog/pg_database_d.h"
28 #include "catalog/pg_subscription.h"
29 #include "catalog/pg_subscription_rel.h"
30 #include "catalog/pg_type.h"
31 #include "commands/dbcommands.h"
32 #include "commands/defrem.h"
33 #include "commands/event_trigger.h"
34 #include "commands/subscriptioncmds.h"
35 #include "executor/executor.h"
36 #include "miscadmin.h"
37 #include "nodes/makefuncs.h"
38 #include "pgstat.h"
39 #include "replication/logicallauncher.h"
40 #include "replication/logicalworker.h"
41 #include "replication/origin.h"
42 #include "replication/slot.h"
43 #include "replication/walreceiver.h"
44 #include "replication/walsender.h"
45 #include "replication/worker_internal.h"
46 #include "storage/lmgr.h"
47 #include "utils/acl.h"
48 #include "utils/builtins.h"
49 #include "utils/guc.h"
50 #include "utils/lsyscache.h"
51 #include "utils/memutils.h"
52 #include "utils/pg_lsn.h"
53 #include "utils/syscache.h"
54 
55 /*
56  * Options that can be specified by the user in CREATE/ALTER SUBSCRIPTION
57  * command.
58  */
59 #define SUBOPT_CONNECT 0x00000001
60 #define SUBOPT_ENABLED 0x00000002
61 #define SUBOPT_CREATE_SLOT 0x00000004
62 #define SUBOPT_SLOT_NAME 0x00000008
63 #define SUBOPT_COPY_DATA 0x00000010
64 #define SUBOPT_SYNCHRONOUS_COMMIT 0x00000020
65 #define SUBOPT_REFRESH 0x00000040
66 #define SUBOPT_BINARY 0x00000080
67 #define SUBOPT_STREAMING 0x00000100
68 #define SUBOPT_TWOPHASE_COMMIT 0x00000200
69 #define SUBOPT_DISABLE_ON_ERR 0x00000400
70 #define SUBOPT_PASSWORD_REQUIRED 0x00000800
71 #define SUBOPT_RUN_AS_OWNER 0x00001000
72 #define SUBOPT_FAILOVER 0x00002000
73 #define SUBOPT_LSN 0x00004000
74 #define SUBOPT_ORIGIN 0x00008000
75 
76 /* check if the 'val' has 'bits' set */
77 #define IsSet(val, bits) (((val) & (bits)) == (bits))
78 
79 /*
80  * Structure to hold a bitmap representing the user-provided CREATE/ALTER
81  * SUBSCRIPTION command options and the parsed/default values of each of them.
82  */
83 typedef struct SubOpts
84 {
85  bits32 specified_opts;
86  char *slot_name;
87  char *synchronous_commit;
88  bool connect;
89  bool enabled;
90  bool create_slot;
91  bool copy_data;
92  bool refresh;
93  bool binary;
94  char streaming;
95  bool twophase;
96  bool disableonerr;
97  bool passwordrequired;
98  bool runasowner;
99  bool failover;
100  char *origin;
101  XLogRecPtr lsn;
102 } SubOpts;
103 
104 static List *fetch_table_list(WalReceiverConn *wrconn, List *publications);
105 static void check_publications_origin(WalReceiverConn *wrconn,
106  List *publications, bool copydata,
107  char *origin, Oid *subrel_local_oids,
108  int subrel_count, char *subname);
109 static void check_duplicates_in_publist(List *publist, Datum *datums);
110 static List *merge_publications(List *oldpublist, List *newpublist, bool addpub, const char *subname);
111 static void ReportSlotConnectionError(List *rstates, Oid subid, char *slotname, char *err);
112 
113 
114 /*
115  * Common option parsing function for CREATE and ALTER SUBSCRIPTION commands.
116  *
117  * Since not all options can be specified in both commands, this function
118  * will report an error if mutually exclusive options are specified.
119  */
120 static void
121 parse_subscription_options(ParseState *pstate, List *stmt_options,
122  bits32 supported_opts, SubOpts *opts)
123 {
124  ListCell *lc;
125 
126  /* Start out with cleared opts. */
127  memset(opts, 0, sizeof(SubOpts));
128 
129  /* caller must expect some option */
130  Assert(supported_opts != 0);
131 
132  /* If connect option is supported, these others also need to be. */
133  Assert(!IsSet(supported_opts, SUBOPT_CONNECT) ||
134  IsSet(supported_opts, SUBOPT_ENABLED | SUBOPT_CREATE_SLOT |
135  SUBOPT_COPY_DATA));
136 
137  /* Set default values for the supported options. */
138  if (IsSet(supported_opts, SUBOPT_CONNECT))
139  opts->connect = true;
140  if (IsSet(supported_opts, SUBOPT_ENABLED))
141  opts->enabled = true;
142  if (IsSet(supported_opts, SUBOPT_CREATE_SLOT))
143  opts->create_slot = true;
144  if (IsSet(supported_opts, SUBOPT_COPY_DATA))
145  opts->copy_data = true;
146  if (IsSet(supported_opts, SUBOPT_REFRESH))
147  opts->refresh = true;
148  if (IsSet(supported_opts, SUBOPT_BINARY))
149  opts->binary = false;
150  if (IsSet(supported_opts, SUBOPT_STREAMING))
151  opts->streaming = LOGICALREP_STREAM_OFF;
152  if (IsSet(supported_opts, SUBOPT_TWOPHASE_COMMIT))
153  opts->twophase = false;
154  if (IsSet(supported_opts, SUBOPT_DISABLE_ON_ERR))
155  opts->disableonerr = false;
156  if (IsSet(supported_opts, SUBOPT_PASSWORD_REQUIRED))
157  opts->passwordrequired = true;
158  if (IsSet(supported_opts, SUBOPT_RUN_AS_OWNER))
159  opts->runasowner = false;
160  if (IsSet(supported_opts, SUBOPT_FAILOVER))
161  opts->failover = false;
162  if (IsSet(supported_opts, SUBOPT_ORIGIN))
163  opts->origin = pstrdup(LOGICALREP_ORIGIN_ANY);
164 
165  /* Parse options */
166  foreach(lc, stmt_options)
167  {
168  DefElem *defel = (DefElem *) lfirst(lc);
169 
170  if (IsSet(supported_opts, SUBOPT_CONNECT) &&
171  strcmp(defel->defname, "connect") == 0)
172  {
173  if (IsSet(opts->specified_opts, SUBOPT_CONNECT))
174  errorConflictingDefElem(defel, pstate);
175 
176  opts->specified_opts |= SUBOPT_CONNECT;
177  opts->connect = defGetBoolean(defel);
178  }
179  else if (IsSet(supported_opts, SUBOPT_ENABLED) &&
180  strcmp(defel->defname, "enabled") == 0)
181  {
182  if (IsSet(opts->specified_opts, SUBOPT_ENABLED))
183  errorConflictingDefElem(defel, pstate);
184 
185  opts->specified_opts |= SUBOPT_ENABLED;
186  opts->enabled = defGetBoolean(defel);
187  }
188  else if (IsSet(supported_opts, SUBOPT_CREATE_SLOT) &&
189  strcmp(defel->defname, "create_slot") == 0)
190  {
191  if (IsSet(opts->specified_opts, SUBOPT_CREATE_SLOT))
192  errorConflictingDefElem(defel, pstate);
193 
194  opts->specified_opts |= SUBOPT_CREATE_SLOT;
195  opts->create_slot = defGetBoolean(defel);
196  }
197  else if (IsSet(supported_opts, SUBOPT_SLOT_NAME) &&
198  strcmp(defel->defname, "slot_name") == 0)
199  {
200  if (IsSet(opts->specified_opts, SUBOPT_SLOT_NAME))
201  errorConflictingDefElem(defel, pstate);
202 
203  opts->specified_opts |= SUBOPT_SLOT_NAME;
204  opts->slot_name = defGetString(defel);
205 
206  /* Setting slot_name = NONE is treated as no slot name. */
207  if (strcmp(opts->slot_name, "none") == 0)
208  opts->slot_name = NULL;
209  else
210  ReplicationSlotValidateName(opts->slot_name, ERROR);
211  }
212  else if (IsSet(supported_opts, SUBOPT_COPY_DATA) &&
213  strcmp(defel->defname, "copy_data") == 0)
214  {
215  if (IsSet(opts->specified_opts, SUBOPT_COPY_DATA))
216  errorConflictingDefElem(defel, pstate);
217 
218  opts->specified_opts |= SUBOPT_COPY_DATA;
219  opts->copy_data = defGetBoolean(defel);
220  }
221  else if (IsSet(supported_opts, SUBOPT_SYNCHRONOUS_COMMIT) &&
222  strcmp(defel->defname, "synchronous_commit") == 0)
223  {
224  if (IsSet(opts->specified_opts, SUBOPT_SYNCHRONOUS_COMMIT))
225  errorConflictingDefElem(defel, pstate);
226 
227  opts->specified_opts |= SUBOPT_SYNCHRONOUS_COMMIT;
228  opts->synchronous_commit = defGetString(defel);
229 
230  /* Test if the given value is valid for synchronous_commit GUC. */
231  (void) set_config_option("synchronous_commit", opts->synchronous_commit,
232  PGC_BACKEND, PGC_S_TEST, GUC_ACTION_SET,
233  false, 0, false);
234  }
235  else if (IsSet(supported_opts, SUBOPT_REFRESH) &&
236  strcmp(defel->defname, "refresh") == 0)
237  {
238  if (IsSet(opts->specified_opts, SUBOPT_REFRESH))
239  errorConflictingDefElem(defel, pstate);
240 
241  opts->specified_opts |= SUBOPT_REFRESH;
242  opts->refresh = defGetBoolean(defel);
243  }
244  else if (IsSet(supported_opts, SUBOPT_BINARY) &&
245  strcmp(defel->defname, "binary") == 0)
246  {
247  if (IsSet(opts->specified_opts, SUBOPT_BINARY))
248  errorConflictingDefElem(defel, pstate);
249 
250  opts->specified_opts |= SUBOPT_BINARY;
251  opts->binary = defGetBoolean(defel);
252  }
253  else if (IsSet(supported_opts, SUBOPT_STREAMING) &&
254  strcmp(defel->defname, "streaming") == 0)
255  {
256  if (IsSet(opts->specified_opts, SUBOPT_STREAMING))
257  errorConflictingDefElem(defel, pstate);
258 
259  opts->specified_opts |= SUBOPT_STREAMING;
260  opts->streaming = defGetStreamingMode(defel);
261  }
262  else if (strcmp(defel->defname, "two_phase") == 0)
263  {
264  /*
265  * Do not allow toggling of two_phase option. Doing so could cause
266  * missing of transactions and lead to an inconsistent replica.
267  * See comments atop worker.c
268  *
269  * Note: Unsupported twophase indicates that this call originated
270  * from AlterSubscription.
271  */
272  if (!IsSet(supported_opts, SUBOPT_TWOPHASE_COMMIT))
273  ereport(ERROR,
274  (errcode(ERRCODE_SYNTAX_ERROR),
275  errmsg("unrecognized subscription parameter: \"%s\"", defel->defname)));
276 
277  if (IsSet(opts->specified_opts, SUBOPT_TWOPHASE_COMMIT))
278  errorConflictingDefElem(defel, pstate);
279 
280  opts->specified_opts |= SUBOPT_TWOPHASE_COMMIT;
281  opts->twophase = defGetBoolean(defel);
282  }
283  else if (IsSet(supported_opts, SUBOPT_DISABLE_ON_ERR) &&
284  strcmp(defel->defname, "disable_on_error") == 0)
285  {
286  if (IsSet(opts->specified_opts, SUBOPT_DISABLE_ON_ERR))
287  errorConflictingDefElem(defel, pstate);
288 
289  opts->specified_opts |= SUBOPT_DISABLE_ON_ERR;
290  opts->disableonerr = defGetBoolean(defel);
291  }
292  else if (IsSet(supported_opts, SUBOPT_PASSWORD_REQUIRED) &&
293  strcmp(defel->defname, "password_required") == 0)
294  {
295  if (IsSet(opts->specified_opts, SUBOPT_PASSWORD_REQUIRED))
296  errorConflictingDefElem(defel, pstate);
297 
298  opts->specified_opts |= SUBOPT_PASSWORD_REQUIRED;
299  opts->passwordrequired = defGetBoolean(defel);
300  }
301  else if (IsSet(supported_opts, SUBOPT_RUN_AS_OWNER) &&
302  strcmp(defel->defname, "run_as_owner") == 0)
303  {
304  if (IsSet(opts->specified_opts, SUBOPT_RUN_AS_OWNER))
305  errorConflictingDefElem(defel, pstate);
306 
307  opts->specified_opts |= SUBOPT_RUN_AS_OWNER;
308  opts->runasowner = defGetBoolean(defel);
309  }
310  else if (IsSet(supported_opts, SUBOPT_FAILOVER) &&
311  strcmp(defel->defname, "failover") == 0)
312  {
313  if (IsSet(opts->specified_opts, SUBOPT_FAILOVER))
314  errorConflictingDefElem(defel, pstate);
315 
316  opts->specified_opts |= SUBOPT_FAILOVER;
317  opts->failover = defGetBoolean(defel);
318  }
319  else if (IsSet(supported_opts, SUBOPT_ORIGIN) &&
320  strcmp(defel->defname, "origin") == 0)
321  {
322  if (IsSet(opts->specified_opts, SUBOPT_ORIGIN))
323  errorConflictingDefElem(defel, pstate);
324 
325  opts->specified_opts |= SUBOPT_ORIGIN;
326  pfree(opts->origin);
327 
328  /*
329  * Even though the "origin" parameter allows only "none" and "any"
330  * values, it is implemented as a string type so that the
331  * parameter can be extended in future versions to support
332  * filtering using origin names specified by the user.
333  */
334  opts->origin = defGetString(defel);
335 
336  if ((pg_strcasecmp(opts->origin, LOGICALREP_ORIGIN_NONE) != 0) &&
337  (pg_strcasecmp(opts->origin, LOGICALREP_ORIGIN_ANY) != 0))
338  ereport(ERROR,
339  errcode(ERRCODE_INVALID_PARAMETER_VALUE),
340  errmsg("unrecognized origin value: \"%s\"", opts->origin));
341  }
342  else if (IsSet(supported_opts, SUBOPT_LSN) &&
343  strcmp(defel->defname, "lsn") == 0)
344  {
345  char *lsn_str = defGetString(defel);
346  XLogRecPtr lsn;
347 
348  if (IsSet(opts->specified_opts, SUBOPT_LSN))
349  errorConflictingDefElem(defel, pstate);
350 
351  /* Setting lsn = NONE is treated as resetting LSN */
352  if (strcmp(lsn_str, "none") == 0)
353  lsn = InvalidXLogRecPtr;
354  else
355  {
356  /* Parse the argument as LSN */
357  lsn = DatumGetLSN(DirectFunctionCall1(pg_lsn_in,
358  CStringGetDatum(lsn_str)));
359 
360  if (XLogRecPtrIsInvalid(lsn))
361  ereport(ERROR,
362  (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
363  errmsg("invalid WAL location (LSN): %s", lsn_str)));
364  }
365 
366  opts->specified_opts |= SUBOPT_LSN;
367  opts->lsn = lsn;
368  }
369  else
370  ereport(ERROR,
371  (errcode(ERRCODE_SYNTAX_ERROR),
372  errmsg("unrecognized subscription parameter: \"%s\"", defel->defname)));
373  }
374 
375  /*
376  * We've been explicitly asked to not connect, that requires some
377  * additional processing.
378  */
379  if (!opts->connect && IsSet(supported_opts, SUBOPT_CONNECT))
380  {
381  /* Check for incompatible options from the user. */
382  if (opts->enabled &&
383  IsSet(opts->specified_opts, SUBOPT_ENABLED))
384  ereport(ERROR,
385  (errcode(ERRCODE_SYNTAX_ERROR),
386  /*- translator: both %s are strings of the form "option = value" */
387  errmsg("%s and %s are mutually exclusive options",
388  "connect = false", "enabled = true")));
389 
390  if (opts->create_slot &&
391  IsSet(opts->specified_opts, SUBOPT_CREATE_SLOT))
392  ereport(ERROR,
393  (errcode(ERRCODE_SYNTAX_ERROR),
394  errmsg("%s and %s are mutually exclusive options",
395  "connect = false", "create_slot = true")));
396 
397  if (opts->copy_data &&
398  IsSet(opts->specified_opts, SUBOPT_COPY_DATA))
399  ereport(ERROR,
400  (errcode(ERRCODE_SYNTAX_ERROR),
401  errmsg("%s and %s are mutually exclusive options",
402  "connect = false", "copy_data = true")));
403 
404  /* Change the defaults of other options. */
405  opts->enabled = false;
406  opts->create_slot = false;
407  opts->copy_data = false;
408  }
409 
410  /*
411  * Do additional checking for disallowed combination when slot_name = NONE
412  * was used.
413  */
414  if (!opts->slot_name &&
415  IsSet(opts->specified_opts, SUBOPT_SLOT_NAME))
416  {
417  if (opts->enabled)
418  {
419  if (IsSet(opts->specified_opts, SUBOPT_ENABLED))
420  ereport(ERROR,
421  (errcode(ERRCODE_SYNTAX_ERROR),
422  /*- translator: both %s are strings of the form "option = value" */
423  errmsg("%s and %s are mutually exclusive options",
424  "slot_name = NONE", "enabled = true")));
425  else
426  ereport(ERROR,
427  (errcode(ERRCODE_SYNTAX_ERROR),
428  /*- translator: both %s are strings of the form "option = value" */
429  errmsg("subscription with %s must also set %s",
430  "slot_name = NONE", "enabled = false")));
431  }
432 
433  if (opts->create_slot)
434  {
435  if (IsSet(opts->specified_opts, SUBOPT_CREATE_SLOT))
436  ereport(ERROR,
437  (errcode(ERRCODE_SYNTAX_ERROR),
438  /*- translator: both %s are strings of the form "option = value" */
439  errmsg("%s and %s are mutually exclusive options",
440  "slot_name = NONE", "create_slot = true")));
441  else
442  ereport(ERROR,
443  (errcode(ERRCODE_SYNTAX_ERROR),
444  /*- translator: both %s are strings of the form "option = value" */
445  errmsg("subscription with %s must also set %s",
446  "slot_name = NONE", "create_slot = false")));
447  }
448  }
449 }
450 
451 /*
452  * Add publication names from the list to a string.
453  */
454 static void
455 get_publications_str(List *publications, StringInfo dest, bool quote_literal)
456 {
457  ListCell *lc;
458  bool first = true;
459 
460  Assert(publications != NIL);
461 
462  foreach(lc, publications)
463  {
464  char *pubname = strVal(lfirst(lc));
465 
466  if (first)
467  first = false;
468  else
469  appendStringInfoString(dest, ", ");
470 
471  if (quote_literal)
472  appendStringInfoString(dest, quote_literal_cstr(pubname));
473  else
474  {
475  appendStringInfoChar(dest, '"');
476  appendStringInfoString(dest, pubname);
477  appendStringInfoChar(dest, '"');
478  }
479  }
480 }
481 
482 /*
483  * Check that the specified publications are present on the publisher.
484  */
485 static void
486 check_publications(WalReceiverConn *wrconn, List *publications)
487 {
488  WalRcvExecResult *res;
489  StringInfo cmd;
490  TupleTableSlot *slot;
491  List *publicationsCopy = NIL;
492  Oid tableRow[1] = {TEXTOID};
493 
494  cmd = makeStringInfo();
495  appendStringInfoString(cmd, "SELECT t.pubname FROM\n"
496  " pg_catalog.pg_publication t WHERE\n"
497  " t.pubname IN (");
498  get_publications_str(publications, cmd, true);
499  appendStringInfoChar(cmd, ')');
500 
501  res = walrcv_exec(wrconn, cmd->data, 1, tableRow);
502  destroyStringInfo(cmd);
503 
504  if (res->status != WALRCV_OK_TUPLES)
505  ereport(ERROR,
506  errmsg("could not receive list of publications from the publisher: %s",
507  res->err));
508 
509  publicationsCopy = list_copy(publications);
510 
511  /* Process publication(s). */
512  slot = MakeSingleTupleTableSlot(res->tupledesc, &TTSOpsMinimalTuple);
513  while (tuplestore_gettupleslot(res->tuplestore, true, false, slot))
514  {
515  char *pubname;
516  bool isnull;
517 
518  pubname = TextDatumGetCString(slot_getattr(slot, 1, &isnull));
519  Assert(!isnull);
520 
521  /* Delete the publication present in publisher from the list. */
522  publicationsCopy = list_delete(publicationsCopy, makeString(pubname));
523  ExecClearTuple(slot);
524  }
525 
526  ExecDropSingleTupleTableSlot(slot);
527 
528  walrcv_clear_result(res);
529 
530  if (list_length(publicationsCopy))
531  {
532  /* Prepare the list of non-existent publication(s) for error message. */
533  StringInfo pubnames = makeStringInfo();
534 
535  get_publications_str(publicationsCopy, pubnames, false);
536  ereport(WARNING,
537  errcode(ERRCODE_UNDEFINED_OBJECT),
538  errmsg_plural("publication %s does not exist on the publisher",
539  "publications %s do not exist on the publisher",
540  list_length(publicationsCopy),
541  pubnames->data));
542  }
543 }
544 
545 /*
546  * Auxiliary function to build a text array out of a list of String nodes.
547  */
548 static Datum
549 publicationListToArray(List *publist)
550 {
551  ArrayType *arr;
552  Datum *datums;
553  MemoryContext memcxt;
554  MemoryContext oldcxt;
555 
556  /* Create memory context for temporary allocations. */
557  memcxt = AllocSetContextCreate(CurrentMemoryContext,
558  "publicationListToArray to array",
559  ALLOCSET_DEFAULT_SIZES);
560  oldcxt = MemoryContextSwitchTo(memcxt);
561 
562  datums = (Datum *) palloc(sizeof(Datum) * list_length(publist));
563 
564  check_duplicates_in_publist(publist, datums);
565 
566  MemoryContextSwitchTo(oldcxt);
567 
568  arr = construct_array_builtin(datums, list_length(publist), TEXTOID);
569 
570  MemoryContextDelete(memcxt);
571 
572  return PointerGetDatum(arr);
573 }
574 
575 /*
576  * Create new subscription.
577  */
578 ObjectAddress
579 CreateSubscription(ParseState *pstate, CreateSubscriptionStmt *stmt,
580  bool isTopLevel)
581 {
582  Relation rel;
583  ObjectAddress myself;
584  Oid subid;
585  bool nulls[Natts_pg_subscription];
586  Datum values[Natts_pg_subscription];
587  Oid owner = GetUserId();
588  HeapTuple tup;
589  char *conninfo;
590  char originname[NAMEDATALEN];
591  List *publications;
592  bits32 supported_opts;
593  SubOpts opts = {0};
594  AclResult aclresult;
595 
596  /*
597  * Parse and check options.
598  *
599  * Connection and publication should not be specified here.
600  */
601  supported_opts = (SUBOPT_CONNECT | SUBOPT_ENABLED | SUBOPT_CREATE_SLOT |
602  SUBOPT_SLOT_NAME | SUBOPT_COPY_DATA |
603  SUBOPT_SYNCHRONOUS_COMMIT | SUBOPT_BINARY |
604  SUBOPT_STREAMING | SUBOPT_TWOPHASE_COMMIT |
605  SUBOPT_DISABLE_ON_ERR | SUBOPT_PASSWORD_REQUIRED |
606  SUBOPT_RUN_AS_OWNER | SUBOPT_FAILOVER | SUBOPT_ORIGIN);
607  parse_subscription_options(pstate, stmt->options, supported_opts, &opts);
608 
609  /*
610  * Since creating a replication slot is not transactional, rolling back
611  * the transaction leaves the created replication slot. So we cannot run
612  * CREATE SUBSCRIPTION inside a transaction block if creating a
613  * replication slot.
614  */
615  if (opts.create_slot)
616  PreventInTransactionBlock(isTopLevel, "CREATE SUBSCRIPTION ... WITH (create_slot = true)");
617 
618  /*
619  * We don't want to allow unprivileged users to be able to trigger
620  * attempts to access arbitrary network destinations, so require the user
621  * to have been specifically authorized to create subscriptions.
622  */
623  if (!has_privs_of_role(owner, ROLE_PG_CREATE_SUBSCRIPTION))
624  ereport(ERROR,
625  (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
626  errmsg("permission denied to create subscription"),
627  errdetail("Only roles with privileges of the \"%s\" role may create subscriptions.",
628  "pg_create_subscription")));
629 
630  /*
631  * Since a subscription is a database object, we also check for CREATE
632  * permission on the database.
633  */
634  aclresult = object_aclcheck(DatabaseRelationId, MyDatabaseId,
635  owner, ACL_CREATE);
636  if (aclresult != ACLCHECK_OK)
637  aclcheck_error(aclresult, OBJECT_DATABASE,
638  get_database_name(MyDatabaseId));
639 
640  /*
641  * Non-superusers are required to set a password for authentication, and
642  * that password must be used by the target server, but the superuser can
643  * exempt a subscription from this requirement.
644  */
645  if (!opts.passwordrequired && !superuser_arg(owner))
646  ereport(ERROR,
647  (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
648  errmsg("password_required=false is superuser-only"),
649  errhint("Subscriptions with the password_required option set to false may only be created or modified by the superuser.")));
650 
651  /*
652  * If built with appropriate switch, whine when regression-testing
653  * conventions for subscription names are violated.
654  */
655 #ifdef ENFORCE_REGRESSION_TEST_NAME_RESTRICTIONS
656  if (strncmp(stmt->subname, "regress_", 8) != 0)
657  elog(WARNING, "subscriptions created by regression test cases should have names starting with \"regress_\"");
658 #endif
659 
660  rel = table_open(SubscriptionRelationId, RowExclusiveLock);
661 
662  /* Check if name is used */
663  subid = GetSysCacheOid2(SUBSCRIPTIONNAME, Anum_pg_subscription_oid,
664  MyDatabaseId, CStringGetDatum(stmt->subname));
665  if (OidIsValid(subid))
666  {
667  ereport(ERROR,
668  (errcode(ERRCODE_DUPLICATE_OBJECT),
669  errmsg("subscription \"%s\" already exists",
670  stmt->subname)));
671  }
672 
673  if (!IsSet(opts.specified_opts, SUBOPT_SLOT_NAME) &&
674  opts.slot_name == NULL)
675  opts.slot_name = stmt->subname;
676 
677  /* The default for synchronous_commit of subscriptions is off. */
678  if (opts.synchronous_commit == NULL)
679  opts.synchronous_commit = "off";
680 
681  conninfo = stmt->conninfo;
682  publications = stmt->publication;
683 
684  /* Load the library providing us libpq calls. */
685  load_file("libpqwalreceiver", false);
686 
687  /* Check the connection info string. */
688  walrcv_check_conninfo(conninfo, opts.passwordrequired && !superuser());
689 
690  /* Everything ok, form a new tuple. */
691  memset(values, 0, sizeof(values));
692  memset(nulls, false, sizeof(nulls));
693 
694  subid = GetNewOidWithIndex(rel, SubscriptionObjectIndexId,
695  Anum_pg_subscription_oid);
696  values[Anum_pg_subscription_oid - 1] = ObjectIdGetDatum(subid);
697  values[Anum_pg_subscription_subdbid - 1] = ObjectIdGetDatum(MyDatabaseId);
698  values[Anum_pg_subscription_subskiplsn - 1] = LSNGetDatum(InvalidXLogRecPtr);
699  values[Anum_pg_subscription_subname - 1] =
700  DirectFunctionCall1(namein, CStringGetDatum(stmt->subname));
701  values[Anum_pg_subscription_subowner - 1] = ObjectIdGetDatum(owner);
702  values[Anum_pg_subscription_subenabled - 1] = BoolGetDatum(opts.enabled);
703  values[Anum_pg_subscription_subbinary - 1] = BoolGetDatum(opts.binary);
704  values[Anum_pg_subscription_substream - 1] = CharGetDatum(opts.streaming);
705  values[Anum_pg_subscription_subtwophasestate - 1] =
706  CharGetDatum(opts.twophase ?
707  LOGICALREP_TWOPHASE_STATE_PENDING :
708  LOGICALREP_TWOPHASE_STATE_DISABLED);
709  values[Anum_pg_subscription_subdisableonerr - 1] = BoolGetDatum(opts.disableonerr);
710  values[Anum_pg_subscription_subpasswordrequired - 1] = BoolGetDatum(opts.passwordrequired);
711  values[Anum_pg_subscription_subrunasowner - 1] = BoolGetDatum(opts.runasowner);
712  values[Anum_pg_subscription_subfailover - 1] = BoolGetDatum(opts.failover);
713  values[Anum_pg_subscription_subconninfo - 1] =
714  CStringGetTextDatum(conninfo);
715  if (opts.slot_name)
716  values[Anum_pg_subscription_subslotname - 1] =
717  DirectFunctionCall1(namein, CStringGetDatum(opts.slot_name));
718  else
719  nulls[Anum_pg_subscription_subslotname - 1] = true;
720  values[Anum_pg_subscription_subsynccommit - 1] =
721  CStringGetTextDatum(opts.synchronous_commit);
722  values[Anum_pg_subscription_subpublications - 1] =
723  publicationListToArray(publications);
724  values[Anum_pg_subscription_suborigin - 1] =
725  CStringGetTextDatum(opts.origin);
726 
727  tup = heap_form_tuple(RelationGetDescr(rel), values, nulls);
728 
729  /* Insert tuple into catalog. */
730  CatalogTupleInsert(rel, tup);
731  heap_freetuple(tup);
732 
733  recordDependencyOnOwner(SubscriptionRelationId, subid, owner);
734 
735  ReplicationOriginNameForLogicalRep(subid, InvalidOid, originname, sizeof(originname));
736  replorigin_create(originname);
737 
738  /*
739  * Connect to remote side to execute requested commands and fetch table
740  * info.
741  */
742  if (opts.connect)
743  {
744  char *err;
745  WalReceiverConn *wrconn;
746  List *tables;
747  ListCell *lc;
748  char table_state;
749  bool must_use_password;
750 
751  /* Try to connect to the publisher. */
752  must_use_password = !superuser_arg(owner) && opts.passwordrequired;
753  wrconn = walrcv_connect(conninfo, true, true, must_use_password,
754  stmt->subname, &err);
755  if (!wrconn)
756  ereport(ERROR,
757  (errcode(ERRCODE_CONNECTION_FAILURE),
758  errmsg("could not connect to the publisher: %s", err)));
759 
760  PG_TRY();
761  {
762  check_publications(wrconn, publications);
763  check_publications_origin(wrconn, publications, opts.copy_data,
764  opts.origin, NULL, 0, stmt->subname);
765 
766  /*
767  * Set sync state based on if we were asked to do data copy or
768  * not.
769  */
770  table_state = opts.copy_data ? SUBREL_STATE_INIT : SUBREL_STATE_READY;
771 
772  /*
773  * Get the table list from publisher and build local table status
774  * info.
775  */
776  tables = fetch_table_list(wrconn, publications);
777  foreach(lc, tables)
778  {
779  RangeVar *rv = (RangeVar *) lfirst(lc);
780  Oid relid;
781 
782  relid = RangeVarGetRelid(rv, AccessShareLock, false);
783 
784  /* Check for supported relkind. */
785  CheckSubscriptionRelkind(get_rel_relkind(relid),
786  rv->schemaname, rv->relname);
787 
788  AddSubscriptionRelState(subid, relid, table_state,
789  InvalidXLogRecPtr, true);
790  }
791 
792  /*
793  * If requested, create permanent slot for the subscription. We
794  * won't use the initial snapshot for anything, so no need to
795  * export it.
796  */
797  if (opts.create_slot)
798  {
799  bool twophase_enabled = false;
800 
801  Assert(opts.slot_name);
802 
803  /*
804  * Even if two_phase is set, don't create the slot with
805  * two-phase enabled. Will enable it once all the tables are
806  * synced and ready. This avoids race-conditions like prepared
807  * transactions being skipped due to changes not being applied
808  * due to checks in should_apply_changes_for_rel() when
809  * tablesync for the corresponding tables are in progress. See
810  * comments atop worker.c.
811  *
812  * Note that if tables were specified but copy_data is false
813  * then it is safe to enable two_phase up-front because those
814  * tables are already initially in READY state. When the
815  * subscription has no tables, we leave the twophase state as
816  * PENDING, to allow ALTER SUBSCRIPTION ... REFRESH
817  * PUBLICATION to work.
818  */
819  if (opts.twophase && !opts.copy_data && tables != NIL)
820  twophase_enabled = true;
821 
822  walrcv_create_slot(wrconn, opts.slot_name, false, twophase_enabled,
823  opts.failover, CRS_NOEXPORT_SNAPSHOT, NULL);
824 
825  if (twophase_enabled)
826  UpdateTwoPhaseState(subid, LOGICALREP_TWOPHASE_STATE_ENABLED);
827 
828  ereport(NOTICE,
829  (errmsg("created replication slot \"%s\" on publisher",
830  opts.slot_name)));
831  }
832  }
833  PG_FINALLY();
834  {
835  walrcv_disconnect(wrconn);
836  }
837  PG_END_TRY();
838  }
839  else
840  ereport(WARNING,
841  (errmsg("subscription was created, but is not connected"),
842  errhint("To initiate replication, you must manually create the replication slot, enable the subscription, and refresh the subscription.")));
843 
844  table_close(rel, RowExclusiveLock);
845 
846  pgstat_create_subscription(subid);
847 
848  if (opts.enabled)
849  ApplyLauncherWakeupAtCommit();
850 
851  ObjectAddressSet(myself, SubscriptionRelationId, subid);
852 
853  InvokeObjectPostCreateHook(SubscriptionRelationId, subid, 0);
854 
855  return myself;
856 }
857 
858 static void
859 AlterSubscription_refresh(Subscription *sub, bool copy_data,
860  List *validate_publications)
861 {
862  char *err;
863  List *pubrel_names;
864  List *subrel_states;
865  Oid *subrel_local_oids;
866  Oid *pubrel_local_oids;
867  ListCell *lc;
868  int off;
869  int remove_rel_len;
870  int subrel_count;
871  Relation rel = NULL;
872  typedef struct SubRemoveRels
873  {
874  Oid relid;
875  char state;
876  } SubRemoveRels;
877  SubRemoveRels *sub_remove_rels;
878  WalReceiverConn *wrconn;
879  bool must_use_password;
880 
881  /* Load the library providing us libpq calls. */
882  load_file("libpqwalreceiver", false);
883 
884  /* Try to connect to the publisher. */
885  must_use_password = sub->passwordrequired && !sub->ownersuperuser;
886  wrconn = walrcv_connect(sub->conninfo, true, true, must_use_password,
887  sub->name, &err);
888  if (!wrconn)
889  ereport(ERROR,
890  (errcode(ERRCODE_CONNECTION_FAILURE),
891  errmsg("could not connect to the publisher: %s", err)));
892 
893  PG_TRY();
894  {
895  if (validate_publications)
896  check_publications(wrconn, validate_publications);
897 
898  /* Get the table list from publisher. */
899  pubrel_names = fetch_table_list(wrconn, sub->publications);
900 
901  /* Get local table list. */
902  subrel_states = GetSubscriptionRelations(sub->oid, false);
903  subrel_count = list_length(subrel_states);
904 
905  /*
906  * Build qsorted array of local table oids for faster lookup. This can
907  * potentially contain all tables in the database so speed of lookup
908  * is important.
909  */
910  subrel_local_oids = palloc(subrel_count * sizeof(Oid));
911  off = 0;
912  foreach(lc, subrel_states)
913  {
914  SubscriptionRelState *relstate = (SubscriptionRelState *) lfirst(lc);
915 
916  subrel_local_oids[off++] = relstate->relid;
917  }
918  qsort(subrel_local_oids, subrel_count,
919  sizeof(Oid), oid_cmp);
920 
921  check_publications_origin(wrconn, sub->publications, copy_data,
922  sub->origin, subrel_local_oids,
923  subrel_count, sub->name);
924 
925  /*
926  * Rels that we want to remove from subscription and drop any slots
927  * and origins corresponding to them.
928  */
929  sub_remove_rels = palloc(subrel_count * sizeof(SubRemoveRels));
930 
931  /*
932  * Walk over the remote tables and try to match them to locally known
933  * tables. If the table is not known locally create a new state for
934  * it.
935  *
936  * Also builds array of local oids of remote tables for the next step.
937  */
938  off = 0;
939  pubrel_local_oids = palloc(list_length(pubrel_names) * sizeof(Oid));
940 
941  foreach(lc, pubrel_names)
942  {
943  RangeVar *rv = (RangeVar *) lfirst(lc);
944  Oid relid;
945 
946  relid = RangeVarGetRelid(rv, AccessShareLock, false);
947 
948  /* Check for supported relkind. */
949  CheckSubscriptionRelkind(get_rel_relkind(relid),
950  rv->schemaname, rv->relname);
951 
952  pubrel_local_oids[off++] = relid;
953 
954  if (!bsearch(&relid, subrel_local_oids,
955  subrel_count, sizeof(Oid), oid_cmp))
956  {
957  AddSubscriptionRelState(sub->oid, relid,
958  copy_data ? SUBREL_STATE_INIT : SUBREL_STATE_READY,
959  InvalidXLogRecPtr, true);
960  ereport(DEBUG1,
961  (errmsg_internal("table \"%s.%s\" added to subscription \"%s\"",
962  rv->schemaname, rv->relname, sub->name)));
963  }
964  }
965 
966  /*
967  * Next remove state for tables we should not care about anymore using
968  * the data we collected above
969  */
970  qsort(pubrel_local_oids, list_length(pubrel_names),
971  sizeof(Oid), oid_cmp);
972 
973  remove_rel_len = 0;
974  for (off = 0; off < subrel_count; off++)
975  {
976  Oid relid = subrel_local_oids[off];
977 
978  if (!bsearch(&relid, pubrel_local_oids,
979  list_length(pubrel_names), sizeof(Oid), oid_cmp))
980  {
981  char state;
982  XLogRecPtr statelsn;
983 
984  /*
985  * Lock pg_subscription_rel with AccessExclusiveLock to
986  * prevent any race conditions with the apply worker
987  * re-launching workers at the same time this code is trying
988  * to remove those tables.
989  *
990  * Even if new worker for this particular rel is restarted it
991  * won't be able to make any progress as we hold exclusive
992  * lock on pg_subscription_rel till the transaction end. It
993  * will simply exit as there is no corresponding rel entry.
994  *
995  * This locking also ensures that the state of rels won't
996  * change till we are done with this refresh operation.
997  */
998  if (!rel)
999  rel = table_open(SubscriptionRelRelationId, AccessExclusiveLock);
1000 
1001  /* Last known rel state. */
1002  state = GetSubscriptionRelState(sub->oid, relid, &statelsn);
1003 
1004  sub_remove_rels[remove_rel_len].relid = relid;
1005  sub_remove_rels[remove_rel_len++].state = state;
1006 
1007  RemoveSubscriptionRel(sub->oid, relid);
1008 
1009  logicalrep_worker_stop(sub->oid, relid);
1010 
1011  /*
1012  * For READY state, we would have already dropped the
1013  * tablesync origin.
1014  */
1015  if (state != SUBREL_STATE_READY)
1016  {
1017  char originname[NAMEDATALEN];
1018 
1019  /*
1020  * Drop the tablesync's origin tracking if exists.
1021  *
1022  * It is possible that the origin is not yet created for
1023  * tablesync worker, this can happen for the states before
1024  * SUBREL_STATE_FINISHEDCOPY. The tablesync worker or
1025  * apply worker can also concurrently try to drop the
1026  * origin and by this time the origin might be already
1027  * removed. For these reasons, passing missing_ok = true.
1028  */
1029  ReplicationOriginNameForLogicalRep(sub->oid, relid, originname,
1030  sizeof(originname));
1031  replorigin_drop_by_name(originname, true, false);
1032  }
1033 
1034  ereport(DEBUG1,
1035  (errmsg_internal("table \"%s.%s\" removed from subscription \"%s\"",
1036  get_namespace_name(get_rel_namespace(relid)),
1037  get_rel_name(relid),
1038  sub->name)));
1039  }
1040  }
1041 
1042  /*
1043  * Drop the tablesync slots associated with removed tables. This has
1044  * to be at the end because otherwise if there is an error while doing
1045  * the database operations we won't be able to rollback dropped slots.
1046  */
1047  for (off = 0; off < remove_rel_len; off++)
1048  {
1049  if (sub_remove_rels[off].state != SUBREL_STATE_READY &&
1050  sub_remove_rels[off].state != SUBREL_STATE_SYNCDONE)
1051  {
1052  char syncslotname[NAMEDATALEN] = {0};
1053 
1054  /*
1055  * For READY/SYNCDONE states we know the tablesync slot has
1056  * already been dropped by the tablesync worker.
1057  *
1058  * For other states, there is no certainty, maybe the slot
1059  * does not exist yet. Also, if we fail after removing some of
1060  * the slots, next time, it will again try to drop already
1061  * dropped slots and fail. For these reasons, we allow
1062  * missing_ok = true for the drop.
1063  */
1064  ReplicationSlotNameForTablesync(sub->oid, sub_remove_rels[off].relid,
1065  syncslotname, sizeof(syncslotname));
1066  ReplicationSlotDropAtPubNode(wrconn, syncslotname, true);
1067  }
1068  }
1069  }
1070  PG_FINALLY();
1071  {
1072  walrcv_disconnect(wrconn);
1073  }
1074  PG_END_TRY();
1075 
1076  if (rel)
1077  table_close(rel, NoLock);
1078 }
1079 
1080 /*
1081  * Alter the existing subscription.
1082  */
1083 ObjectAddress
1084 AlterSubscription(ParseState *pstate, AlterSubscriptionStmt *stmt,
1085  bool isTopLevel)
1086 {
1087  Relation rel;
1088  ObjectAddress myself;
1089  bool nulls[Natts_pg_subscription];
1090  bool replaces[Natts_pg_subscription];
1091  Datum values[Natts_pg_subscription];
1092  HeapTuple tup;
1093  Oid subid;
1094  bool update_tuple = false;
1095  Subscription *sub;
1096  Form_pg_subscription form;
1097  bits32 supported_opts;
1098  SubOpts opts = {0};
1099 
1100  rel = table_open(SubscriptionRelationId, RowExclusiveLock);
1101 
1102  /* Fetch the existing tuple. */
1103  tup = SearchSysCacheCopy2(SUBSCRIPTIONNAME, MyDatabaseId,
1104  CStringGetDatum(stmt->subname));
1105 
1106  if (!HeapTupleIsValid(tup))
1107  ereport(ERROR,
1108  (errcode(ERRCODE_UNDEFINED_OBJECT),
1109  errmsg("subscription \"%s\" does not exist",
1110  stmt->subname)));
1111 
1112  form = (Form_pg_subscription) GETSTRUCT(tup);
1113  subid = form->oid;
1114 
1115  /* must be owner */
1116  if (!object_ownercheck(SubscriptionRelationId, subid, GetUserId()))
1117  aclcheck_error(ACLCHECK_NOT_OWNER, OBJECT_SUBSCRIPTION,
1118  stmt->subname);
1119 
1120  sub = GetSubscription(subid, false);
1121 
1122  /*
1123  * Don't allow non-superuser modification of a subscription with
1124  * password_required=false.
1125  */
1126  if (!sub->passwordrequired && !superuser())
1127  ereport(ERROR,
1128  (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
1129  errmsg("password_required=false is superuser-only"),
1130  errhint("Subscriptions with the password_required option set to false may only be created or modified by the superuser.")));
1131 
1132  /* Lock the subscription so nobody else can do anything with it. */
1133  LockSharedObject(SubscriptionRelationId, subid, 0, AccessExclusiveLock);
1134 
1135  /* Form a new tuple. */
1136  memset(values, 0, sizeof(values));
1137  memset(nulls, false, sizeof(nulls));
1138  memset(replaces, false, sizeof(replaces));
1139 
1140  switch (stmt->kind)
1141  {
1142  case ALTER_SUBSCRIPTION_OPTIONS:
1143  {
1144  supported_opts = (SUBOPT_SLOT_NAME |
1145  SUBOPT_SYNCHRONOUS_COMMIT | SUBOPT_BINARY |
1146  SUBOPT_STREAMING | SUBOPT_DISABLE_ON_ERR |
1147  SUBOPT_PASSWORD_REQUIRED |
1148  SUBOPT_RUN_AS_OWNER | SUBOPT_FAILOVER |
1149  SUBOPT_ORIGIN);
1150 
1151  parse_subscription_options(pstate, stmt->options,
1152  supported_opts, &opts);
1153 
1154  if (IsSet(opts.specified_opts, SUBOPT_SLOT_NAME))
1155  {
1156  /*
1157  * The subscription must be disabled to allow slot_name as
1158  * 'none', otherwise, the apply worker will repeatedly try
1159  * to stream the data using that slot_name which neither
1160  * exists on the publisher nor the user will be allowed to
1161  * create it.
1162  */
1163  if (sub->enabled && !opts.slot_name)
1164  ereport(ERROR,
1165  (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
1166  errmsg("cannot set %s for enabled subscription",
1167  "slot_name = NONE")));
1168 
1169  if (opts.slot_name)
1170  values[Anum_pg_subscription_subslotname - 1] =
1171  DirectFunctionCall1(namein, CStringGetDatum(opts.slot_name));
1172  else
1173  nulls[Anum_pg_subscription_subslotname - 1] = true;
1174  replaces[Anum_pg_subscription_subslotname - 1] = true;
1175  }
1176 
1177  if (opts.synchronous_commit)
1178  {
1179  values[Anum_pg_subscription_subsynccommit - 1] =
1180  CStringGetTextDatum(opts.synchronous_commit);
1181  replaces[Anum_pg_subscription_subsynccommit - 1] = true;
1182  }
1183 
1184  if (IsSet(opts.specified_opts, SUBOPT_BINARY))
1185  {
1186  values[Anum_pg_subscription_subbinary - 1] =
1187  BoolGetDatum(opts.binary);
1188  replaces[Anum_pg_subscription_subbinary - 1] = true;
1189  }
1190 
1191  if (IsSet(opts.specified_opts, SUBOPT_STREAMING))
1192  {
1193  values[Anum_pg_subscription_substream - 1] =
1194  CharGetDatum(opts.streaming);
1195  replaces[Anum_pg_subscription_substream - 1] = true;
1196  }
1197 
1198  if (IsSet(opts.specified_opts, SUBOPT_DISABLE_ON_ERR))
1199  {
1200  values[Anum_pg_subscription_subdisableonerr - 1]
1201  = BoolGetDatum(opts.disableonerr);
1202  replaces[Anum_pg_subscription_subdisableonerr - 1]
1203  = true;
1204  }
1205 
1206  if (IsSet(opts.specified_opts, SUBOPT_PASSWORD_REQUIRED))
1207  {
1208  /* Non-superuser may not disable password_required. */
1209  if (!opts.passwordrequired && !superuser())
1210  ereport(ERROR,
1211  (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
1212  errmsg("password_required=false is superuser-only"),
1213  errhint("Subscriptions with the password_required option set to false may only be created or modified by the superuser.")));
1214 
1215  values[Anum_pg_subscription_subpasswordrequired - 1]
1216  = BoolGetDatum(opts.passwordrequired);
1217  replaces[Anum_pg_subscription_subpasswordrequired - 1]
1218  = true;
1219  }
1220 
1221  if (IsSet(opts.specified_opts, SUBOPT_RUN_AS_OWNER))
1222  {
1223  values[Anum_pg_subscription_subrunasowner - 1] =
1224  BoolGetDatum(opts.runasowner);
1225  replaces[Anum_pg_subscription_subrunasowner - 1] = true;
1226  }
1227 
1228  if (IsSet(opts.specified_opts, SUBOPT_FAILOVER))
1229  {
1230  if (!sub->slotname)
1231  ereport(ERROR,
1232  (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
1233  errmsg("cannot set %s for a subscription that does not have a slot name",
1234  "failover")));
1235 
1236  /*
1237  * Do not allow changing the failover state if the
1238  * subscription is enabled. This is because the failover
1239  * state of the slot on the publisher cannot be modified
1240  * if the slot is currently acquired by the apply worker.
1241  */
1242  if (sub->enabled)
1243  ereport(ERROR,
1244  (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
1245  errmsg("cannot set %s for enabled subscription",
1246  "failover")));
1247 
1248  /*
1249  * The changed failover option of the slot can't be rolled
1250  * back.
1251  */
1252  PreventInTransactionBlock(isTopLevel, "ALTER SUBSCRIPTION ... SET (failover)");
1253 
1254  values[Anum_pg_subscription_subfailover - 1] =
1255  BoolGetDatum(opts.failover);
1256  replaces[Anum_pg_subscription_subfailover - 1] = true;
1257  }
1258 
1259  if (IsSet(opts.specified_opts, SUBOPT_ORIGIN))
1260  {
1261  values[Anum_pg_subscription_suborigin - 1] =
1262  CStringGetTextDatum(opts.origin);
1263  replaces[Anum_pg_subscription_suborigin - 1] = true;
1264  }
1265 
1266  update_tuple = true;
1267  break;
1268  }
1269 
1270  case ALTER_SUBSCRIPTION_ENABLED:
1271  {
1272  parse_subscription_options(pstate, stmt->options,
1273  SUBOPT_ENABLED, &opts);
1274  Assert(IsSet(opts.specified_opts, SUBOPT_ENABLED));
1275 
1276  if (!sub->slotname && opts.enabled)
1277  ereport(ERROR,
1278  (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
1279  errmsg("cannot enable subscription that does not have a slot name")));
1280 
1281  values[Anum_pg_subscription_subenabled - 1] =
1282  BoolGetDatum(opts.enabled);
1283  replaces[Anum_pg_subscription_subenabled - 1] = true;
1284 
1285  if (opts.enabled)
1286  ApplyLauncherWakeupAtCommit();
1287 
1288  update_tuple = true;
1289  break;
1290  }
1291 
1292  case ALTER_SUBSCRIPTION_CONNECTION:
1293  /* Load the library providing us libpq calls. */
1294  load_file("libpqwalreceiver", false);
1295  /* Check the connection info string. */
1296  walrcv_check_conninfo(stmt->conninfo,
1297  sub->passwordrequired && !sub->ownersuperuser);
1298 
1299  values[Anum_pg_subscription_subconninfo - 1] =
1300  CStringGetTextDatum(stmt->conninfo);
1301  replaces[Anum_pg_subscription_subconninfo - 1] = true;
1302  update_tuple = true;
1303  break;
1304 
1305  case ALTER_SUBSCRIPTION_SET_PUBLICATION:
1306  {
1307  supported_opts = SUBOPT_COPY_DATA | SUBOPT_REFRESH;
1308  parse_subscription_options(pstate, stmt->options,
1309  supported_opts, &opts);
1310 
1311  values[Anum_pg_subscription_subpublications - 1] =
1312  publicationListToArray(stmt->publication);
1313  replaces[Anum_pg_subscription_subpublications - 1] = true;
1314 
1315  update_tuple = true;
1316 
1317  /* Refresh if user asked us to. */
1318  if (opts.refresh)
1319  {
1320  if (!sub->enabled)
1321  ereport(ERROR,
1322  (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
1323  errmsg("ALTER SUBSCRIPTION with refresh is not allowed for disabled subscriptions"),
1324  errhint("Use ALTER SUBSCRIPTION ... SET PUBLICATION ... WITH (refresh = false).")));
1325 
1326  /*
1327  * See ALTER_SUBSCRIPTION_REFRESH for details why this is
1328  * not allowed.
1329  */
1330  if (sub->twophasestate == LOGICALREP_TWOPHASE_STATE_ENABLED && opts.copy_data)
1331  ereport(ERROR,
1332  (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
1333  errmsg("ALTER SUBSCRIPTION with refresh and copy_data is not allowed when two_phase is enabled"),
1334  errhint("Use ALTER SUBSCRIPTION ... SET PUBLICATION with refresh = false, or with copy_data = false, or use DROP/CREATE SUBSCRIPTION.")));
1335 
1336  PreventInTransactionBlock(isTopLevel, "ALTER SUBSCRIPTION with refresh");
1337 
1338  /* Make sure refresh sees the new list of publications. */
1339  sub->publications = stmt->publication;
1340 
1341  AlterSubscription_refresh(sub, opts.copy_data,
1342  stmt->publication);
1343  }
1344 
1345  break;
1346  }
1347 
1348  case ALTER_SUBSCRIPTION_ADD_PUBLICATION:
1349  case ALTER_SUBSCRIPTION_DROP_PUBLICATION:
1350  {
1351  List *publist;
1352  bool isadd = stmt->kind == ALTER_SUBSCRIPTION_ADD_PUBLICATION;
1353 
1354  supported_opts = SUBOPT_REFRESH | SUBOPT_COPY_DATA;
1355  parse_subscription_options(pstate, stmt->options,
1356  supported_opts, &opts);
1357 
1358  publist = merge_publications(sub->publications, stmt->publication, isadd, stmt->subname);
1359  values[Anum_pg_subscription_subpublications - 1] =
1360  publicationListToArray(publist);
1361  replaces[Anum_pg_subscription_subpublications - 1] = true;
1362 
1363  update_tuple = true;
1364 
1365  /* Refresh if user asked us to. */
1366  if (opts.refresh)
1367  {
1368  /* We only need to validate user specified publications. */
1369  List *validate_publications = (isadd) ? stmt->publication : NULL;
1370 
1371  if (!sub->enabled)
1372  ereport(ERROR,
1373  (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
1374  errmsg("ALTER SUBSCRIPTION with refresh is not allowed for disabled subscriptions"),
1375  /* translator: %s is an SQL ALTER command */
1376  errhint("Use %s instead.",
1377  isadd ?
1378  "ALTER SUBSCRIPTION ... ADD PUBLICATION ... WITH (refresh = false)" :
1379  "ALTER SUBSCRIPTION ... DROP PUBLICATION ... WITH (refresh = false)")));
1380 
1381  /*
1382  * See ALTER_SUBSCRIPTION_REFRESH for details why this is
1383  * not allowed.
1384  */
1385  if (sub->twophasestate == LOGICALREP_TWOPHASE_STATE_ENABLED && opts.copy_data)
1386  ereport(ERROR,
1387  (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
1388  errmsg("ALTER SUBSCRIPTION with refresh and copy_data is not allowed when two_phase is enabled"),
1389  /* translator: %s is an SQL ALTER command */
1390  errhint("Use %s with refresh = false, or with copy_data = false, or use DROP/CREATE SUBSCRIPTION.",
1391  isadd ?
1392  "ALTER SUBSCRIPTION ... ADD PUBLICATION" :
1393  "ALTER SUBSCRIPTION ... DROP PUBLICATION")));
1394 
1395  PreventInTransactionBlock(isTopLevel, "ALTER SUBSCRIPTION with refresh");
1396 
1397  /* Refresh the new list of publications. */
1398  sub->publications = publist;
1399 
1400  AlterSubscription_refresh(sub, opts.copy_data,
1401  validate_publications);
1402  }
1403 
1404  break;
1405  }
1406 
1407  case ALTER_SUBSCRIPTION_REFRESH:
1408  {
1409  if (!sub->enabled)
1410  ereport(ERROR,
1411  (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
1412  errmsg("ALTER SUBSCRIPTION ... REFRESH is not allowed for disabled subscriptions")));
1413 
1414  parse_subscription_options(pstate, stmt->options,
1415  SUBOPT_COPY_DATA, &opts);
1416 
1417  /*
1418  * The subscription option "two_phase" requires that
1419  * replication has passed the initial table synchronization
1420  * phase before the two_phase becomes properly enabled.
1421  *
1422  * But, having reached this two-phase commit "enabled" state
1423  * we must not allow any subsequent table initialization to
1424  * occur. So the ALTER SUBSCRIPTION ... REFRESH is disallowed
1425  * when the user had requested two_phase = on mode.
1426  *
1427  * The exception to this restriction is when copy_data =
1428  * false, because when copy_data is false the tablesync will
1429  * start already in READY state and will exit directly without
1430  * doing anything.
1431  *
1432  * For more details see comments atop worker.c.
1433  */
1434  if (sub->twophasestate == LOGICALREP_TWOPHASE_STATE_ENABLED && opts.copy_data)
1435  ereport(ERROR,
1436  (errcode(ERRCODE_SYNTAX_ERROR),
1437  errmsg("ALTER SUBSCRIPTION ... REFRESH with copy_data is not allowed when two_phase is enabled"),
1438  errhint("Use ALTER SUBSCRIPTION ... REFRESH with copy_data = false, or use DROP/CREATE SUBSCRIPTION.")));
1439 
1440  PreventInTransactionBlock(isTopLevel, "ALTER SUBSCRIPTION ... REFRESH");
1441 
1442  AlterSubscription_refresh(sub, opts.copy_data, NULL);
1443 
1444  break;
1445  }
1446 
1447  case ALTER_SUBSCRIPTION_SKIP:
1448  {
1449  parse_subscription_options(pstate, stmt->options, SUBOPT_LSN, &opts);
1450 
1451  /* ALTER SUBSCRIPTION ... SKIP supports only LSN option */
1452  Assert(IsSet(opts.specified_opts, SUBOPT_LSN));
1453 
1454  /*
1455  * If the user sets subskiplsn, we do a sanity check to make
1456  * sure that the specified LSN is a probable value.
1457  */
1458  if (!XLogRecPtrIsInvalid(opts.lsn))
1459  {
1460  RepOriginId originid;
1461  char originname[NAMEDATALEN];
1462  XLogRecPtr remote_lsn;
1463 
1464  ReplicationOriginNameForLogicalRep(subid, InvalidOid,
1465  originname, sizeof(originname));
1466  originid = replorigin_by_name(originname, false);
1467  remote_lsn = replorigin_get_progress(originid, false);
1468 
1469  /* Check the given LSN is at least a future LSN */
1470  if (!XLogRecPtrIsInvalid(remote_lsn) && opts.lsn < remote_lsn)
1471  ereport(ERROR,
1472  (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
1473  errmsg("skip WAL location (LSN %X/%X) must be greater than origin LSN %X/%X",
1474  LSN_FORMAT_ARGS(opts.lsn),
1475  LSN_FORMAT_ARGS(remote_lsn))));
1476  }
1477 
1478  values[Anum_pg_subscription_subskiplsn - 1] = LSNGetDatum(opts.lsn);
1479  replaces[Anum_pg_subscription_subskiplsn - 1] = true;
1480 
1481  update_tuple = true;
1482  break;
1483  }
1484 
1485  default:
1486  elog(ERROR, "unrecognized ALTER SUBSCRIPTION kind %d",
1487  stmt->kind);
1488  }
1489 
1490  /* Update the catalog if needed. */
1491  if (update_tuple)
1492  {
1493  tup = heap_modify_tuple(tup, RelationGetDescr(rel), values, nulls,
1494  replaces);
1495 
1496  CatalogTupleUpdate(rel, &tup->t_self, tup);
1497 
1498  heap_freetuple(tup);
1499  }
1500 
1501  /*
1502  * Try to acquire the connection necessary for altering slot.
1503  *
1504  * This has to be at the end because otherwise if there is an error while
1505  * doing the database operations we won't be able to rollback altered
1506  * slot.
1507  */
1508  if (replaces[Anum_pg_subscription_subfailover - 1])
1509  {
1510  bool must_use_password;
1511  char *err;
1512  WalReceiverConn *wrconn;
1513 
1514  /* Load the library providing us libpq calls. */
1515  load_file("libpqwalreceiver", false);
1516 
1517  /* Try to connect to the publisher. */
1518  must_use_password = sub->passwordrequired && !sub->ownersuperuser;
1519  wrconn = walrcv_connect(sub->conninfo, true, true, must_use_password,
1520  sub->name, &err);
1521  if (!wrconn)
1522  ereport(ERROR,
1523  (errcode(ERRCODE_CONNECTION_FAILURE),
1524  errmsg("could not connect to the publisher: %s", err)));
1525 
1526  PG_TRY();
1527  {
1528  walrcv_alter_slot(wrconn, sub->slotname, opts.failover);
1529  }
1530  PG_FINALLY();
1531  {
1532  walrcv_disconnect(wrconn);
1533  }
1534  PG_END_TRY();
1535  }
1536 
1537  table_close(rel, RowExclusiveLock);
1538 
1539  ObjectAddressSet(myself, SubscriptionRelationId, subid);
1540 
1541  InvokeObjectPostAlterHook(SubscriptionRelationId, subid, 0);
1542 
1543  /* Wake up related replication workers to handle this change quickly. */
1544  LogicalRepWorkersWakeupAtCommit(subid);
1545 
1546  return myself;
1547 }
1548 
1549 /*
1550  * Drop a subscription
1551  */
1552 void
1553 DropSubscription(DropSubscriptionStmt *stmt, bool isTopLevel)
1554 {
1555  Relation rel;
1556  ObjectAddress myself;
1557  HeapTuple tup;
1558  Oid subid;
1559  Oid subowner;
1560  Datum datum;
1561  bool isnull;
1562  char *subname;
1563  char *conninfo;
1564  char *slotname;
1565  List *subworkers;
1566  ListCell *lc;
1567  char originname[NAMEDATALEN];
1568  char *err = NULL;
1569  WalReceiverConn *wrconn;
1570  Form_pg_subscription form;
1571  List *rstates;
1572  bool must_use_password;
1573 
1574  /*
1575  * Lock pg_subscription with AccessExclusiveLock to ensure that the
1576  * launcher doesn't restart new worker during dropping the subscription
1577  */
1578  rel = table_open(SubscriptionRelationId, AccessExclusiveLock);
1579 
1580  tup = SearchSysCache2(SUBSCRIPTIONNAME, MyDatabaseId,
1581  CStringGetDatum(stmt->subname));
1582 
1583  if (!HeapTupleIsValid(tup))
1584  {
1585  table_close(rel, NoLock);
1586 
1587  if (!stmt->missing_ok)
1588  ereport(ERROR,
1589  (errcode(ERRCODE_UNDEFINED_OBJECT),
1590  errmsg("subscription \"%s\" does not exist",
1591  stmt->subname)));
1592  else
1593  ereport(NOTICE,
1594  (errmsg("subscription \"%s\" does not exist, skipping",
1595  stmt->subname)));
1596 
1597  return;
1598  }
1599 
1600  form = (Form_pg_subscription) GETSTRUCT(tup);
1601  subid = form->oid;
1602  subowner = form->subowner;
1603  must_use_password = !superuser_arg(subowner) && form->subpasswordrequired;
1604 
1605  /* must be owner */
1606  if (!object_ownercheck(SubscriptionRelationId, subid, GetUserId()))
1607  aclcheck_error(ACLCHECK_NOT_OWNER, OBJECT_SUBSCRIPTION,
1608  stmt->subname);
1609 
1610  /* DROP hook for the subscription being removed */
1611  InvokeObjectDropHook(SubscriptionRelationId, subid, 0);
1612 
1613  /*
1614  * Lock the subscription so nobody else can do anything with it (including
1615  * the replication workers).
1616  */
1617  LockSharedObject(SubscriptionRelationId, subid, 0, AccessExclusiveLock);
1618 
1619  /* Get subname */
1620  datum = SysCacheGetAttrNotNull(SUBSCRIPTIONOID, tup,
1621  Anum_pg_subscription_subname);
1622  subname = pstrdup(NameStr(*DatumGetName(datum)));
1623 
1624  /* Get conninfo */
1625  datum = SysCacheGetAttrNotNull(SUBSCRIPTIONOID, tup,
1626  Anum_pg_subscription_subconninfo);
1627  conninfo = TextDatumGetCString(datum);
1628 
1629  /* Get slotname */
1630  datum = SysCacheGetAttr(SUBSCRIPTIONOID, tup,
1631  Anum_pg_subscription_subslotname, &isnull);
1632  if (!isnull)
1633  slotname = pstrdup(NameStr(*DatumGetName(datum)));
1634  else
1635  slotname = NULL;
1636 
1637  /*
1638  * Since dropping a replication slot is not transactional, the replication
1639  * slot stays dropped even if the transaction rolls back. So we cannot
1640  * run DROP SUBSCRIPTION inside a transaction block if dropping the
1641  * replication slot. Also, in this case, we report a message for dropping
1642  * the subscription to the cumulative stats system.
1643  *
1644  * XXX The command name should really be something like "DROP SUBSCRIPTION
1645  * of a subscription that is associated with a replication slot", but we
1646  * don't have the proper facilities for that.
1647  */
1648  if (slotname)
1649  PreventInTransactionBlock(isTopLevel, "DROP SUBSCRIPTION");
1650 
1651  ObjectAddressSet(myself, SubscriptionRelationId, subid);
1652  EventTriggerSQLDropAddObject(&myself, true, true);
1653 
1654  /* Remove the tuple from catalog. */
1655  CatalogTupleDelete(rel, &tup->t_self);
1656 
1657  ReleaseSysCache(tup);
1658 
1659  /*
1660  * Stop all the subscription workers immediately.
1661  *
1662  * This is necessary if we are dropping the replication slot, so that the
1663  * slot becomes accessible.
1664  *
1665  * It is also necessary if the subscription is disabled and was disabled
1666  * in the same transaction. Then the workers haven't seen the disabling
1667  * yet and will still be running, leading to hangs later when we want to
1668  * drop the replication origin. If the subscription was disabled before
1669  * this transaction, then there shouldn't be any workers left, so this
1670  * won't make a difference.
1671  *
1672  * New workers won't be started because we hold an exclusive lock on the
1673  * subscription till the end of the transaction.
1674  */
1675  LWLockAcquire(LogicalRepWorkerLock, LW_SHARED);
1676  subworkers = logicalrep_workers_find(subid, false);
1677  LWLockRelease(LogicalRepWorkerLock);
1678  foreach(lc, subworkers)
1679  {
1680  LogicalRepWorker *w = (LogicalRepWorker *) lfirst(lc);
1681 
1682  logicalrep_worker_stop(w->subid, w->relid);
1683  }
1684  list_free(subworkers);
1685 
1686  /*
1687  * Remove the no-longer-useful entry in the launcher's table of apply
1688  * worker start times.
1689  *
1690  * If this transaction rolls back, the launcher might restart a failed
1691  * apply worker before wal_retrieve_retry_interval milliseconds have
1692  * elapsed, but that's pretty harmless.
1693  */
1694  ApplyLauncherForgetWorkerStartTime(subid);
1695 
1696  /*
1697  * Cleanup of tablesync replication origins.
1698  *
1699  * Any READY-state relations would already have dealt with clean-ups.
1700  *
1701  * Note that the state can't change because we have already stopped both
1702  * the apply and tablesync workers and they can't restart because of
1703  * exclusive lock on the subscription.
1704  */
1705  rstates = GetSubscriptionRelations(subid, true);
1706  foreach(lc, rstates)
1707  {
1708  SubscriptionRelState *rstate = (SubscriptionRelState *) lfirst(lc);
1709  Oid relid = rstate->relid;
1710 
1711  /* Only cleanup resources of tablesync workers */
1712  if (!OidIsValid(relid))
1713  continue;
1714 
1715  /*
1716  * Drop the tablesync's origin tracking if exists.
1717  *
1718  * It is possible that the origin is not yet created for tablesync
1719  * worker so passing missing_ok = true. This can happen for the states
1720  * before SUBREL_STATE_FINISHEDCOPY.
1721  */
1722  ReplicationOriginNameForLogicalRep(subid, relid, originname,
1723  sizeof(originname));
1724  replorigin_drop_by_name(originname, true, false);
1725  }
1726 
1727  /* Clean up dependencies */
1728  deleteSharedDependencyRecordsFor(SubscriptionRelationId, subid, 0);
1729 
1730  /* Remove any associated relation synchronization states. */
1731  RemoveSubscriptionRel(subid, InvalidOid);
1732 
1733  /* Remove the origin tracking if exists. */
1734  ReplicationOriginNameForLogicalRep(subid, InvalidOid, originname, sizeof(originname));
1735  replorigin_drop_by_name(originname, true, false);
1736 
1737  /*
1738  * Tell the cumulative stats system that the subscription is getting
1739  * dropped.
1740  */
1741  pgstat_drop_subscription(subid);
1742 
1743  /*
1744  * If there is no slot associated with the subscription, we can finish
1745  * here.
1746  */
1747  if (!slotname && rstates == NIL)
1748  {
1749  table_close(rel, NoLock);
1750  return;
1751  }
1752 
1753  /*
1754  * Try to acquire the connection necessary for dropping slots.
1755  *
1756  * Note: If the slotname is NONE/NULL then we allow the command to finish
1757  * and users need to manually cleanup the apply and tablesync worker slots
1758  * later.
1759  *
1760  * This has to be at the end because otherwise if there is an error while
1761  * doing the database operations we won't be able to rollback dropped
1762  * slot.
1763  */
1764  load_file("libpqwalreceiver", false);
1765 
1766  wrconn = walrcv_connect(conninfo, true, true, must_use_password,
1767  subname, &err);
1768  if (wrconn == NULL)
1769  {
1770  if (!slotname)
1771  {
1772  /* be tidy */
1773  list_free(rstates);
1774  table_close(rel, NoLock);
1775  return;
1776  }
1777  else
1778  {
1779  ReportSlotConnectionError(rstates, subid, slotname, err);
1780  }
1781  }
1782 
1783  PG_TRY();
1784  {
1785  foreach(lc, rstates)
1786  {
1787  SubscriptionRelState *rstate = (SubscriptionRelState *) lfirst(lc);
1788  Oid relid = rstate->relid;
1789 
1790  /* Only cleanup resources of tablesync workers */
1791  if (!OidIsValid(relid))
1792  continue;
1793 
1794  /*
1795  * Drop the tablesync slots associated with removed tables.
1796  *
1797  * For SYNCDONE/READY states, the tablesync slot is known to have
1798  * already been dropped by the tablesync worker.
1799  *
1800  * For other states, there is no certainty, maybe the slot does
1801  * not exist yet. Also, if we fail after removing some of the
1802  * slots, next time, it will again try to drop already dropped
1803  * slots and fail. For these reasons, we allow missing_ok = true
1804  * for the drop.
1805  */
1806  if (rstate->state != SUBREL_STATE_SYNCDONE)
1807  {
1808  char syncslotname[NAMEDATALEN] = {0};
1809 
1810  ReplicationSlotNameForTablesync(subid, relid, syncslotname,
1811  sizeof(syncslotname));
1812  ReplicationSlotDropAtPubNode(wrconn, syncslotname, true);
1813  }
1814  }
1815 
1816  list_free(rstates);
1817 
1818  /*
1819  * If there is a slot associated with the subscription, then drop the
1820  * replication slot at the publisher.
1821  */
1822  if (slotname)
1823  ReplicationSlotDropAtPubNode(wrconn, slotname, false);
1824  }
1825  PG_FINALLY();
1826  {
1827  walrcv_disconnect(wrconn);
1828  }
1829  PG_END_TRY();
1830 
1831  table_close(rel, NoLock);
1832 }
1833 
1834 /*
1835  * Drop the replication slot at the publisher node using the replication
1836  * connection.
1837  *
1838  * missing_ok - if true then only issue a LOG message if the slot doesn't
1839  * exist.
1840  */
1841 void
1842 ReplicationSlotDropAtPubNode(WalReceiverConn *wrconn, char *slotname, bool missing_ok)
1843 {
1844  StringInfoData cmd;
1845 
1846  Assert(wrconn);
1847 
1848  load_file("libpqwalreceiver", false);
1849 
1850  initStringInfo(&cmd);
1851  appendStringInfo(&cmd, "DROP_REPLICATION_SLOT %s WAIT", quote_identifier(slotname));
1852 
1853  PG_TRY();
1854  {
1855  WalRcvExecResult *res;
1856 
1857  res = walrcv_exec(wrconn, cmd.data, 0, NULL);
1858 
1859  if (res->status == WALRCV_OK_COMMAND)
1860  {
1861  /* NOTICE. Success. */
1862  ereport(NOTICE,
1863  (errmsg("dropped replication slot \"%s\" on publisher",
1864  slotname)));
1865  }
1866  else if (res->status == WALRCV_ERROR &&
1867  missing_ok &&
1868  res->sqlstate == ERRCODE_UNDEFINED_OBJECT)
1869  {
1870  /* LOG. Error, but missing_ok = true. */
1871  ereport(LOG,
1872  (errmsg("could not drop replication slot \"%s\" on publisher: %s",
1873  slotname, res->err)));
1874  }
1875  else
1876  {
1877  /* ERROR. */
1878  ereport(ERROR,
1879  (errcode(ERRCODE_CONNECTION_FAILURE),
1880  errmsg("could not drop replication slot \"%s\" on publisher: %s",
1881  slotname, res->err)));
1882  }
1883 
1884  walrcv_clear_result(res);
1885  }
1886  PG_FINALLY();
1887  {
1888  pfree(cmd.data);
1889  }
1890  PG_END_TRY();
1891 }
1892 
1893 /*
1894  * Internal workhorse for changing a subscription owner
1895  */
1896 static void
1897 AlterSubscriptionOwner_internal(Relation rel, HeapTuple tup, Oid newOwnerId)
1898 {
1899  Form_pg_subscription form;
1900  AclResult aclresult;
1901 
1902  form = (Form_pg_subscription) GETSTRUCT(tup);
1903 
1904  if (form->subowner == newOwnerId)
1905  return;
1906 
1907  if (!object_ownercheck(SubscriptionRelationId, form->oid, GetUserId()))
1908  aclcheck_error(ACLCHECK_NOT_OWNER, OBJECT_SUBSCRIPTION,
1909  NameStr(form->subname));
1910 
1911  /*
1912  * Don't allow non-superuser modification of a subscription with
1913  * password_required=false.
1914  */
1915  if (!form->subpasswordrequired && !superuser())
1916  ereport(ERROR,
1917  (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
1918  errmsg("password_required=false is superuser-only"),
1919  errhint("Subscriptions with the password_required option set to false may only be created or modified by the superuser.")));
1920 
1921  /* Must be able to become new owner */
1922  check_can_set_role(GetUserId(), newOwnerId);
1923 
1924  /*
1925  * current owner must have CREATE on database
1926  *
1927  * This is consistent with how ALTER SCHEMA ... OWNER TO works, but some
1928  * other object types behave differently (e.g. you can't give a table to a
1929  * user who lacks CREATE privileges on a schema).
1930  */
1931  aclresult = object_aclcheck(DatabaseRelationId, MyDatabaseId,
1932  GetUserId(), ACL_CREATE);
1933  if (aclresult != ACLCHECK_OK)
1934  aclcheck_error(aclresult, OBJECT_DATABASE,
1935  get_database_name(MyDatabaseId));
1936 
1937  form->subowner = newOwnerId;
1938  CatalogTupleUpdate(rel, &tup->t_self, tup);
1939 
1940  /* Update owner dependency reference */
1941  changeDependencyOnOwner(SubscriptionRelationId,
1942  form->oid,
1943  newOwnerId);
1944 
1945  InvokeObjectPostAlterHook(SubscriptionRelationId,
1946  form->oid, 0);
1947 
1948  /* Wake up related background processes to handle this change quickly. */
1949  ApplyLauncherWakeupAtCommit();
1950  LogicalRepWorkersWakeupAtCommit(form->oid);
1951 }
1952 
1953 /*
1954  * Change subscription owner -- by name
1955  */
1956 ObjectAddress
1957 AlterSubscriptionOwner(const char *name, Oid newOwnerId)
1958 {
1959  Oid subid;
1960  HeapTuple tup;
1961  Relation rel;
1962  ObjectAddress address;
1963  Form_pg_subscription form;
1964 
1965  rel = table_open(SubscriptionRelationId, RowExclusiveLock);
1966 
1967  tup = SearchSysCacheCopy2(SUBSCRIPTIONNAME, MyDatabaseId,
1968  CStringGetDatum(name));
1969 
1970  if (!HeapTupleIsValid(tup))
1971  ereport(ERROR,
1972  (errcode(ERRCODE_UNDEFINED_OBJECT),
1973  errmsg("subscription \"%s\" does not exist", name)));
1974 
1975  form = (Form_pg_subscription) GETSTRUCT(tup);
1976  subid = form->oid;
1977 
1978  AlterSubscriptionOwner_internal(rel, tup, newOwnerId);
1979 
1980  ObjectAddressSet(address, SubscriptionRelationId, subid);
1981 
1982  heap_freetuple(tup);
1983 
1984  table_close(rel, RowExclusiveLock);
1985 
1986  return address;
1987 }
1988 
1989 /*
1990  * Change subscription owner -- by OID
1991  */
1992 void
1993 AlterSubscriptionOwner_oid(Oid subid, Oid newOwnerId)
1994 {
1995  HeapTuple tup;
1996  Relation rel;
1997 
1998  rel = table_open(SubscriptionRelationId, RowExclusiveLock);
1999 
2000  tup = SearchSysCacheCopy1(SUBSCRIPTIONOID, ObjectIdGetDatum(subid));
2001 
2002  if (!HeapTupleIsValid(tup))
2003  ereport(ERROR,
2004  (errcode(ERRCODE_UNDEFINED_OBJECT),
2005  errmsg("subscription with OID %u does not exist", subid)));
2006 
2007  AlterSubscriptionOwner_internal(rel, tup, newOwnerId);
2008 
2009  heap_freetuple(tup);
2010 
2011  table_close(rel, RowExclusiveLock);
2012 }
2013 
2014 /*
2015  * Check and log a warning if the publisher has subscribed to the same table
2016  * from some other publisher. This check is required only if "copy_data = true"
2017  * and "origin = none" for CREATE SUBSCRIPTION and
2018  * ALTER SUBSCRIPTION ... REFRESH statements to notify the user that data
2019  * having origin might have been copied.
2020  *
2021  * This check need not be performed on the tables that are already added
2022  * because incremental sync for those tables will happen through WAL and the
2023  * origin of the data can be identified from the WAL records.
2024  *
2025  * subrel_local_oids contains the list of relation oids that are already
2026  * present on the subscriber.
2027  */
2028 static void
2029 check_publications_origin(WalReceiverConn *wrconn, List *publications,
2030  bool copydata, char *origin, Oid *subrel_local_oids,
2031  int subrel_count, char *subname)
2032 {
2033  WalRcvExecResult *res;
2034  StringInfoData cmd;
2035  TupleTableSlot *slot;
2036  Oid tableRow[1] = {TEXTOID};
2037  List *publist = NIL;
2038  int i;
2039 
2040  if (!copydata || !origin ||
2041  (pg_strcasecmp(origin, LOGICALREP_ORIGIN_NONE) != 0))
2042  return;
2043 
2044  initStringInfo(&cmd);
2045  appendStringInfoString(&cmd,
2046  "SELECT DISTINCT P.pubname AS pubname\n"
2047  "FROM pg_publication P,\n"
2048  " LATERAL pg_get_publication_tables(P.pubname) GPT\n"
2049  " JOIN pg_subscription_rel PS ON (GPT.relid = PS.srrelid),\n"
2050  " pg_class C JOIN pg_namespace N ON (N.oid = C.relnamespace)\n"
2051  "WHERE C.oid = GPT.relid AND P.pubname IN (");
2052  get_publications_str(publications, &cmd, true);
2053  appendStringInfoString(&cmd, ")\n");
2054 
2055  /*
2056  * In case of ALTER SUBSCRIPTION ... REFRESH, subrel_local_oids contains
2057  * the list of relation oids that are already present on the subscriber.
2058  * This check should be skipped for these tables.
2059  */
2060  for (i = 0; i < subrel_count; i++)
2061  {
2062  Oid relid = subrel_local_oids[i];
2063  char *schemaname = get_namespace_name(get_rel_namespace(relid));
2064  char *tablename = get_rel_name(relid);
2065 
2066  appendStringInfo(&cmd, "AND NOT (N.nspname = '%s' AND C.relname = '%s')\n",
2067  schemaname, tablename);
2068  }
2069 
2070  res = walrcv_exec(wrconn, cmd.data, 1, tableRow);
2071  pfree(cmd.data);
2072 
2073  if (res->status != WALRCV_OK_TUPLES)
2074  ereport(ERROR,
2075  (errcode(ERRCODE_CONNECTION_FAILURE),
2076  errmsg("could not receive list of replicated tables from the publisher: %s",
2077  res->err)));
2078 
2079  /* Process tables. */
2080  slot = MakeSingleTupleTableSlot(res->tupledesc, &TTSOpsMinimalTuple);
2081  while (tuplestore_gettupleslot(res->tuplestore, true, false, slot))
2082  {
2083  char *pubname;
2084  bool isnull;
2085 
2086  pubname = TextDatumGetCString(slot_getattr(slot, 1, &isnull));
2087  Assert(!isnull);
2088 
2089  ExecClearTuple(slot);
2090  publist = list_append_unique(publist, makeString(pubname));
2091  }
2092 
2093  /*
2094  * Log a warning if the publisher has subscribed to the same table from
2095  * some other publisher. We cannot know the origin of data during the
2096  * initial sync. Data origins can be found only from the WAL by looking at
2097  * the origin id.
2098  *
2099  * XXX: For simplicity, we don't check whether the table has any data or
2100  * not. If the table doesn't have any data then we don't need to
2101  * distinguish between data having origin and data not having origin so we
2102  * can avoid logging a warning in that case.
2103  */
2104  if (publist)
2105  {
2106  StringInfo pubnames = makeStringInfo();
2107 
2108  /* Prepare the list of publication(s) for warning message. */
2109  get_publications_str(publist, pubnames, false);
2110  ereport(WARNING,
2111  errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
2112  errmsg("subscription \"%s\" requested copy_data with origin = NONE but might copy data that had a different origin",
2113  subname),
2114  errdetail_plural("The subscription being created subscribes to a publication (%s) that contains tables that are written to by other subscriptions.",
2115  "The subscription being created subscribes to publications (%s) that contain tables that are written to by other subscriptions.",
2116  list_length(publist), pubnames->data),
2117  errhint("Verify that initial data copied from the publisher tables did not come from other origins."));
2118  }
2119 
2120  ExecDropSingleTupleTableSlot(slot);
2121 
2122  walrcv_clear_result(res);
2123 }
2124 
2125 /*
2126  * Get the list of tables which belong to specified publications on the
2127  * publisher connection.
2128  *
2129  * Note that we don't support the case where the column list is different for
2130  * the same table in different publications to avoid sending unwanted column
2131  * information for some of the rows. This can happen when both the column
2132  * list and row filter are specified for different publications.
2133  */
2134 static List *
2135 fetch_table_list(WalReceiverConn *wrconn, List *publications)
2136 {
2137  WalRcvExecResult *res;
2138  StringInfoData cmd;
2139  TupleTableSlot *slot;
2140  Oid tableRow[3] = {TEXTOID, TEXTOID, InvalidOid};
2141  List *tablelist = NIL;
2142  int server_version = walrcv_server_version(wrconn);
2143  bool check_columnlist = (server_version >= 150000);
2144 
2145  initStringInfo(&cmd);
2146 
2147  /* Get the list of tables from the publisher. */
2148  if (server_version >= 160000)
2149  {
2150  StringInfoData pub_names;
2151 
2152  tableRow[2] = INT2VECTOROID;
2153  initStringInfo(&pub_names);
2154  get_publications_str(publications, &pub_names, true);
2155 
2156  /*
2157  * From version 16, we allowed passing multiple publications to the
2158  * function pg_get_publication_tables. This helped to filter out the
2159  * partition table whose ancestor is also published in this
2160  * publication array.
2161  *
2162  * Join pg_get_publication_tables with pg_publication to exclude
2163  * non-existing publications.
2164  *
2165  * Note that attrs are always stored in sorted order so we don't need
2166  * to worry if different publications have specified them in a
2167  * different order. See publication_translate_columns.
2168  */
2169  appendStringInfo(&cmd, "SELECT DISTINCT n.nspname, c.relname, gpt.attrs\n"
2170  " FROM pg_class c\n"
2171  " JOIN pg_namespace n ON n.oid = c.relnamespace\n"
2172  " JOIN ( SELECT (pg_get_publication_tables(VARIADIC array_agg(pubname::text))).*\n"
2173  " FROM pg_publication\n"
2174  " WHERE pubname IN ( %s )) AS gpt\n"
2175  " ON gpt.relid = c.oid\n",
2176  pub_names.data);
2177 
2178  pfree(pub_names.data);
2179  }
2180  else
2181  {
2182  tableRow[2] = NAMEARRAYOID;
2183  appendStringInfoString(&cmd, "SELECT DISTINCT t.schemaname, t.tablename \n");
2184 
2185  /* Get column lists for each relation if the publisher supports it */
2186  if (check_columnlist)
2187  appendStringInfoString(&cmd, ", t.attnames\n");
2188 
2189  appendStringInfoString(&cmd, "FROM pg_catalog.pg_publication_tables t\n"
2190  " WHERE t.pubname IN (");
2191  get_publications_str(publications, &cmd, true);
2192  appendStringInfoChar(&cmd, ')');
2193  }
2194 
2195  res = walrcv_exec(wrconn, cmd.data, check_columnlist ? 3 : 2, tableRow);
2196  pfree(cmd.data);
2197 
2198  if (res->status != WALRCV_OK_TUPLES)
2199  ereport(ERROR,
2200  (errcode(ERRCODE_CONNECTION_FAILURE),
2201  errmsg("could not receive list of replicated tables from the publisher: %s",
2202  res->err)));
2203 
2204  /* Process tables. */
2205  slot = MakeSingleTupleTableSlot(res->tupledesc, &TTSOpsMinimalTuple);
2206  while (tuplestore_gettupleslot(res->tuplestore, true, false, slot))
2207  {
2208  char *nspname;
2209  char *relname;
2210  bool isnull;
2211  RangeVar *rv;
2212 
2213  nspname = TextDatumGetCString(slot_getattr(slot, 1, &isnull));
2214  Assert(!isnull);
2215  relname = TextDatumGetCString(slot_getattr(slot, 2, &isnull));
2216  Assert(!isnull);
2217 
2218  rv = makeRangeVar(nspname, relname, -1);
2219 
2220  if (check_columnlist && list_member(tablelist, rv))
2221  ereport(ERROR,
2222  errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
2223  errmsg("cannot use different column lists for table \"%s.%s\" in different publications",
2224  nspname, relname));
2225  else
2226  tablelist = lappend(tablelist, rv);
2227 
2228  ExecClearTuple(slot);
2229  }
2230  ExecDropSingleTupleTableSlot(slot);
2231 
2232  walrcv_clear_result(res);
2233 
2234  return tablelist;
2235 }
2236 
2237 /*
2238  * This is to report the connection failure while dropping replication slots.
2239  * Here, we report the WARNING for all tablesync slots so that user can drop
2240  * them manually, if required.
2241  */
2242 static void
2243 ReportSlotConnectionError(List *rstates, Oid subid, char *slotname, char *err)
2244 {
2245  ListCell *lc;
2246 
2247  foreach(lc, rstates)
2248  {
2249  SubscriptionRelState *rstate = (SubscriptionRelState *) lfirst(lc);
2250  Oid relid = rstate->relid;
2251 
2252  /* Only cleanup resources of tablesync workers */
2253  if (!OidIsValid(relid))
2254  continue;
2255 
2256  /*
2257  * Caller needs to ensure that relstate doesn't change underneath us.
2258  * See DropSubscription where we get the relstates.
2259  */
2260  if (rstate->state != SUBREL_STATE_SYNCDONE)
2261  {
2262  char syncslotname[NAMEDATALEN] = {0};
2263 
2264  ReplicationSlotNameForTablesync(subid, relid, syncslotname,
2265  sizeof(syncslotname));
2266  elog(WARNING, "could not drop tablesync replication slot \"%s\"",
2267  syncslotname);
2268  }
2269  }
2270 
2271  ereport(ERROR,
2272  (errcode(ERRCODE_CONNECTION_FAILURE),
2273  errmsg("could not connect to publisher when attempting to drop replication slot \"%s\": %s",
2274  slotname, err),
2275  /* translator: %s is an SQL ALTER command */
2276  errhint("Use %s to disable the subscription, and then use %s to disassociate it from the slot.",
2277  "ALTER SUBSCRIPTION ... DISABLE",
2278  "ALTER SUBSCRIPTION ... SET (slot_name = NONE)")));
2279 }
2280 
2281 /*
2282  * Check for duplicates in the given list of publications and error out if
2283  * found one. Add publications to datums as text datums, if datums is not
2284  * NULL.
2285  */
2286 static void
2287 check_duplicates_in_publist(List *publist, Datum *datums)
2288 {
2289  ListCell *cell;
2290  int j = 0;
2291 
2292  foreach(cell, publist)
2293  {
2294  char *name = strVal(lfirst(cell));
2295  ListCell *pcell;
2296 
2297  foreach(pcell, publist)
2298  {
2299  char *pname = strVal(lfirst(pcell));
2300 
2301  if (pcell == cell)
2302  break;
2303 
2304  if (strcmp(name, pname) == 0)
2305  ereport(ERROR,
2306  (errcode(ERRCODE_DUPLICATE_OBJECT),
2307  errmsg("publication name \"%s\" used more than once",
2308  pname)));
2309  }
2310 
2311  if (datums)
2312  datums[j++] = CStringGetTextDatum(name);
2313  }
2314 }
2315 
2316 /*
2317  * Merge current subscription's publications and user-specified publications
2318  * from ADD/DROP PUBLICATIONS.
2319  *
2320  * If addpub is true, we will add the list of publications into oldpublist.
2321  * Otherwise, we will delete the list of publications from oldpublist. The
2322  * returned list is a copy, oldpublist itself is not changed.
2323  *
2324  * subname is the subscription name, for error messages.
2325  */
2326 static List *
2327 merge_publications(List *oldpublist, List *newpublist, bool addpub, const char *subname)
2328 {
2329  ListCell *lc;
2330 
2331  oldpublist = list_copy(oldpublist);
2332 
2333  check_duplicates_in_publist(newpublist, NULL);
2334 
2335  foreach(lc, newpublist)
2336  {
2337  char *name = strVal(lfirst(lc));
2338  ListCell *lc2;
2339  bool found = false;
2340 
2341  foreach(lc2, oldpublist)
2342  {
2343  char *pubname = strVal(lfirst(lc2));
2344 
2345  if (strcmp(name, pubname) == 0)
2346  {
2347  found = true;
2348  if (addpub)
2349  ereport(ERROR,
2350  (errcode(ERRCODE_DUPLICATE_OBJECT),
2351  errmsg("publication \"%s\" is already in subscription \"%s\"",
2352  name, subname)));
2353  else
2354  oldpublist = foreach_delete_current(oldpublist, lc2);
2355 
2356  break;
2357  }
2358  }
2359 
2360  if (addpub && !found)
2361  oldpublist = lappend(oldpublist, makeString(name));
2362  else if (!addpub && !found)
2363  ereport(ERROR,
2364  (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
2365  errmsg("publication \"%s\" is not in subscription \"%s\"",
2366  name, subname)));
2367  }
2368 
2369  /*
2370  * XXX Probably no strong reason for this, but for now it's to make ALTER
2371  * SUBSCRIPTION ... DROP PUBLICATION consistent with SET PUBLICATION.
2372  */
2373  if (!oldpublist)
2374  ereport(ERROR,
2375  (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
2376  errmsg("cannot drop all the publications from a subscription")));
2377 
2378  return oldpublist;
2379 }
2380 
2381 /*
2382  * Extract the streaming mode value from a DefElem. This is like
2383  * defGetBoolean() but also accepts the special value of "parallel".
2384  */
2385 char
2386 defGetStreamingMode(DefElem *def)
2387 {
2388  /*
2389  * If no parameter value given, assume "true" is meant.
2390  */
2391  if (!def->arg)
2392  return LOGICALREP_STREAM_ON;
2393 
2394  /*
2395  * Allow 0, 1, "false", "true", "off", "on" or "parallel".
2396  */
2397  switch (nodeTag(def->arg))
2398  {
2399  case T_Integer:
2400  switch (intVal(def->arg))
2401  {
2402  case 0:
2403  return LOGICALREP_STREAM_OFF;
2404  case 1:
2405  return LOGICALREP_STREAM_ON;
2406  default:
2407  /* otherwise, error out below */
2408  break;
2409  }
2410  break;
2411  default:
2412  {
2413  char *sval = defGetString(def);
2414 
2415  /*
2416  * The set of strings accepted here should match up with the
2417  * grammar's opt_boolean_or_string production.
2418  */
2419  if (pg_strcasecmp(sval, "false") == 0 ||
2420  pg_strcasecmp(sval, "off") == 0)
2421  return LOGICALREP_STREAM_OFF;
2422  if (pg_strcasecmp(sval, "true") == 0 ||
2423  pg_strcasecmp(sval, "on") == 0)
2424  return LOGICALREP_STREAM_ON;
2425  if (pg_strcasecmp(sval, "parallel") == 0)
2426  return LOGICALREP_STREAM_PARALLEL;
2427  }
2428  break;
2429  }
2430 
2431  ereport(ERROR,
2432  (errcode(ERRCODE_SYNTAX_ERROR),
2433  errmsg("%s requires a Boolean value or \"parallel\"",
2434  def->defname)));
2435  return LOGICALREP_STREAM_OFF; /* keep compiler quiet */
2436 }
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bool has_privs_of_role(Oid member, Oid role)
Definition: acl.c:5128
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Definition: acl.h:182
ACLCHECK_OK
@ ACLCHECK_OK
Definition: acl.h:183
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Definition: acl.h:185
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Definition: worker.c:4989
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static Datum values[MAXATTR]
Definition: bootstrap.c:152
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Definition: builtins.h:98
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Definition: define.c:107
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Definition: elog.h:30
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Definition: elog.h:224
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Definition: elog.h:35
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Definition: elog.h:387
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Definition: elog.h:149
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Definition: err.c:43
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void EventTriggerSQLDropAddObject(const ObjectAddress *object, bool original, bool normal)
Definition: event_trigger.c:1280
event_trigger.h
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void CheckSubscriptionRelkind(char relkind, const char *nspname, const char *relname)
Definition: execReplication.c:739
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void ExecDropSingleTupleTableSlot(TupleTableSlot *slot)
Definition: execTuples.c:1341
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const TupleTableSlotOps TTSOpsMinimalTuple
Definition: execTuples.c:86
MakeSingleTupleTableSlot
TupleTableSlot * MakeSingleTupleTableSlot(TupleDesc tupdesc, const TupleTableSlotOps *tts_ops)
Definition: execTuples.c:1325
DirectFunctionCall1
#define DirectFunctionCall1(func, arg1)
Definition: fmgr.h:642
MyDatabaseId
Oid MyDatabaseId
Definition: globals.c:91
set_config_option
int set_config_option(const char *name, const char *value, GucContext context, GucSource source, GucAction action, bool changeVal, int elevel, bool is_reload)
Definition: guc.c:3343
GUC_ACTION_SET
@ GUC_ACTION_SET
Definition: guc.h:199
PGC_S_TEST
@ PGC_S_TEST
Definition: guc.h:121
PGC_BACKEND
@ PGC_BACKEND
Definition: guc.h:73
heap_modify_tuple
HeapTuple heap_modify_tuple(HeapTuple tuple, TupleDesc tupleDesc, const Datum *replValues, const bool *replIsnull, const bool *doReplace)
Definition: heaptuple.c:1209
heap_form_tuple
HeapTuple heap_form_tuple(TupleDesc tupleDescriptor, const Datum *values, const bool *isnull)
Definition: heaptuple.c:1116
heap_freetuple
void heap_freetuple(HeapTuple htup)
Definition: heaptuple.c:1434
HeapTupleIsValid
#define HeapTupleIsValid(tuple)
Definition: htup.h:78
htup_details.h
GETSTRUCT
#define GETSTRUCT(TUP)
Definition: htup_details.h:653
stmt
#define stmt
Definition: indent_codes.h:59
CatalogTupleUpdate
void CatalogTupleUpdate(Relation heapRel, ItemPointer otid, HeapTuple tup)
Definition: indexing.c:313
CatalogTupleInsert
void CatalogTupleInsert(Relation heapRel, HeapTuple tup)
Definition: indexing.c:233
CatalogTupleDelete
void CatalogTupleDelete(Relation heapRel, ItemPointer tid)
Definition: indexing.c:365
j
int j
Definition: isn.c:74
i
int i
Definition: isn.c:73
if
if(TABLE==NULL||TABLE_index==NULL)
Definition: isn.c:77
logicalrep_workers_find
List * logicalrep_workers_find(Oid subid, bool only_running)
Definition: launcher.c:275
logicalrep_worker_stop
void logicalrep_worker_stop(Oid subid, Oid relid)
Definition: launcher.c:609
ApplyLauncherWakeupAtCommit
void ApplyLauncherWakeupAtCommit(void)
Definition: launcher.c:1105
ApplyLauncherForgetWorkerStartTime
void ApplyLauncherForgetWorkerStartTime(Oid subid)
Definition: launcher.c:1075
lappend
List * lappend(List *list, void *datum)
Definition: list.c:339
list_copy
List * list_copy(const List *oldlist)
Definition: list.c:1573
list_append_unique
List * list_append_unique(List *list, void *datum)
Definition: list.c:1343
list_delete
List * list_delete(List *list, void *datum)
Definition: list.c:853
list_free
void list_free(List *list)
Definition: list.c:1546
list_member
bool list_member(const List *list, const void *datum)
Definition: list.c:661
LockSharedObject
void LockSharedObject(Oid classid, Oid objid, uint16 objsubid, LOCKMODE lockmode)
Definition: lmgr.c:1083
NoLock
#define NoLock
Definition: lockdefs.h:34
AccessExclusiveLock
#define AccessExclusiveLock
Definition: lockdefs.h:43
AccessShareLock
#define AccessShareLock
Definition: lockdefs.h:36
RowExclusiveLock
#define RowExclusiveLock
Definition: lockdefs.h:38
get_namespace_name
char * get_namespace_name(Oid nspid)
Definition: lsyscache.c:3366
get_rel_relkind
char get_rel_relkind(Oid relid)
Definition: lsyscache.c:2003
get_rel_namespace
Oid get_rel_namespace(Oid relid)
Definition: lsyscache.c:1952
get_rel_name
char * get_rel_name(Oid relid)
Definition: lsyscache.c:1928
LWLockAcquire
bool LWLockAcquire(LWLock *lock, LWLockMode mode)
Definition: lwlock.c:1170
LWLockRelease
void LWLockRelease(LWLock *lock)
Definition: lwlock.c:1783
LW_SHARED
@ LW_SHARED
Definition: lwlock.h:115
makeRangeVar
RangeVar * makeRangeVar(char *schemaname, char *relname, int location)
Definition: makefuncs.c:424
pstrdup
char * pstrdup(const char *in)
Definition: mcxt.c:1695
pfree
void pfree(void *pointer)
Definition: mcxt.c:1520
CurrentMemoryContext
MemoryContext CurrentMemoryContext
Definition: mcxt.c:143
MemoryContextDelete
void MemoryContextDelete(MemoryContext context)
Definition: mcxt.c:454
palloc
void * palloc(Size size)
Definition: mcxt.c:1316
AllocSetContextCreate
#define AllocSetContextCreate
Definition: memutils.h:129
ALLOCSET_DEFAULT_SIZES
#define ALLOCSET_DEFAULT_SIZES
Definition: memutils.h:160
GetUserId
Oid GetUserId(void)
Definition: miscinit.c:514
namein
Datum namein(PG_FUNCTION_ARGS)
Definition: name.c:48
RangeVarGetRelid
#define RangeVarGetRelid(relation, lockmode, missing_ok)
Definition: namespace.h:80
generate_unaccent_rules.dest
dest
Definition: generate_unaccent_rules.py:280
nodeTag
#define nodeTag(nodeptr)
Definition: nodes.h:133
InvokeObjectPostCreateHook
#define InvokeObjectPostCreateHook(classId, objectId, subId)
Definition: objectaccess.h:173
InvokeObjectPostAlterHook
#define InvokeObjectPostAlterHook(classId, objectId, subId)
Definition: objectaccess.h:197
InvokeObjectDropHook
#define InvokeObjectDropHook(classId, objectId, subId)
Definition: objectaccess.h:182
ObjectAddressSet
#define ObjectAddressSet(addr, class_id, object_id)
Definition: objectaddress.h:40
oid_cmp
int oid_cmp(const void *p1, const void *p2)
Definition: oid.c:258
replorigin_by_name
RepOriginId replorigin_by_name(const char *roname, bool missing_ok)
Definition: origin.c:221
replorigin_create
RepOriginId replorigin_create(const char *roname)
Definition: origin.c:252
replorigin_get_progress
XLogRecPtr replorigin_get_progress(RepOriginId node, bool flush)
Definition: origin.c:1014
replorigin_drop_by_name
void replorigin_drop_by_name(const char *name, bool missing_ok, bool nowait)
Definition: origin.c:411
ALTER_SUBSCRIPTION_ENABLED
@ ALTER_SUBSCRIPTION_ENABLED
Definition: parsenodes.h:4223
ALTER_SUBSCRIPTION_DROP_PUBLICATION
@ ALTER_SUBSCRIPTION_DROP_PUBLICATION
Definition: parsenodes.h:4221
ALTER_SUBSCRIPTION_SET_PUBLICATION
@ ALTER_SUBSCRIPTION_SET_PUBLICATION
Definition: parsenodes.h:4219
ALTER_SUBSCRIPTION_REFRESH
@ ALTER_SUBSCRIPTION_REFRESH
Definition: parsenodes.h:4222
ALTER_SUBSCRIPTION_SKIP
@ ALTER_SUBSCRIPTION_SKIP
Definition: parsenodes.h:4224
ALTER_SUBSCRIPTION_OPTIONS
@ ALTER_SUBSCRIPTION_OPTIONS
Definition: parsenodes.h:4217
ALTER_SUBSCRIPTION_CONNECTION
@ ALTER_SUBSCRIPTION_CONNECTION
Definition: parsenodes.h:4218
ALTER_SUBSCRIPTION_ADD_PUBLICATION
@ ALTER_SUBSCRIPTION_ADD_PUBLICATION
Definition: parsenodes.h:4220
OBJECT_DATABASE
@ OBJECT_DATABASE
Definition: parsenodes.h:2272
OBJECT_SUBSCRIPTION
@ OBJECT_SUBSCRIPTION
Definition: parsenodes.h:2301
ACL_CREATE
#define ACL_CREATE
Definition: parsenodes.h:85
opts
static AmcheckOptions opts
Definition: pg_amcheck.c:111
relname
NameData relname
Definition: pg_class.h:38
NAMEDATALEN
#define NAMEDATALEN
Definition: pg_config_manual.h:29
server_version
static int server_version
Definition: pg_dumpall.c:110
lfirst
#define lfirst(lc)
Definition: pg_list.h:172
list_length
static int list_length(const List *l)
Definition: pg_list.h:152
NIL
#define NIL
Definition: pg_list.h:68
foreach_delete_current
#define foreach_delete_current(lst, var_or_cell)
Definition: pg_list.h:391
pg_lsn_in
Datum pg_lsn_in(PG_FUNCTION_ARGS)
Definition: pg_lsn.c:63
pg_lsn.h
LSNGetDatum
static Datum LSNGetDatum(XLogRecPtr X)
Definition: pg_lsn.h:28
DatumGetLSN
static XLogRecPtr DatumGetLSN(Datum X)
Definition: pg_lsn.h:22
changeDependencyOnOwner
void changeDependencyOnOwner(Oid classId, Oid objectId, Oid newOwnerId)
Definition: pg_shdepend.c:308
deleteSharedDependencyRecordsFor
void deleteSharedDependencyRecordsFor(Oid classId, Oid objectId, int32 objectSubId)
Definition: pg_shdepend.c:997
recordDependencyOnOwner
void recordDependencyOnOwner(Oid classId, Oid objectId, Oid owner)
Definition: pg_shdepend.c:160
RemoveSubscriptionRel
void RemoveSubscriptionRel(Oid subid, Oid relid)
Definition: pg_subscription.c:391
GetSubscriptionRelations
List * GetSubscriptionRelations(Oid subid, bool not_ready)
Definition: pg_subscription.c:501
GetSubscriptionRelState
char GetSubscriptionRelState(Oid subid, Oid relid, XLogRecPtr *sublsn)
Definition: pg_subscription.c:341
GetSubscription
Subscription * GetSubscription(Oid subid, bool missing_ok)
Definition: pg_subscription.c:41
AddSubscriptionRelState
void AddSubscriptionRelState(Oid subid, Oid relid, char state, XLogRecPtr sublsn, bool retain_lock)
Definition: pg_subscription.c:236
pg_subscription.h
LOGICALREP_ORIGIN_NONE
#define LOGICALREP_ORIGIN_NONE
Definition: pg_subscription.h:38
LOGICALREP_STREAM_ON
#define LOGICALREP_STREAM_ON
Definition: pg_subscription.h:169
LOGICALREP_ORIGIN_ANY
#define LOGICALREP_ORIGIN_ANY
Definition: pg_subscription.h:44
LOGICALREP_STREAM_OFF
#define LOGICALREP_STREAM_OFF
Definition: pg_subscription.h:163
LOGICALREP_STREAM_PARALLEL
#define LOGICALREP_STREAM_PARALLEL
Definition: pg_subscription.h:175
subname
NameData subname
Definition: pg_subscription.h:73
LOGICALREP_TWOPHASE_STATE_DISABLED
#define LOGICALREP_TWOPHASE_STATE_DISABLED
Definition: pg_subscription.h:30
LOGICALREP_TWOPHASE_STATE_PENDING
#define LOGICALREP_TWOPHASE_STATE_PENDING
Definition: pg_subscription.h:31
LOGICALREP_TWOPHASE_STATE_ENABLED
#define LOGICALREP_TWOPHASE_STATE_ENABLED
Definition: pg_subscription.h:32
Form_pg_subscription
FormData_pg_subscription * Form_pg_subscription
Definition: pg_subscription.h:119
pg_subscription_rel.h
pg_type.h
pgstat_drop_subscription
void pgstat_drop_subscription(Oid subid)
Definition: pgstat_subscription.c:64
pgstat_create_subscription
void pgstat_create_subscription(Oid subid)
Definition: pgstat_subscription.c:46
pg_strcasecmp
int pg_strcasecmp(const char *s1, const char *s2)
Definition: pgstrcasecmp.c:36
qsort
#define qsort(a, b, c, d)
Definition: port.h:449
PointerGetDatum
static Datum PointerGetDatum(const void *X)
Definition: postgres.h:322
DatumGetName
static Name DatumGetName(Datum X)
Definition: postgres.h:360
Datum
uintptr_t Datum
Definition: postgres.h:64
BoolGetDatum
static Datum BoolGetDatum(bool X)
Definition: postgres.h:102
ObjectIdGetDatum
static Datum ObjectIdGetDatum(Oid X)
Definition: postgres.h:252
CStringGetDatum
static Datum CStringGetDatum(const char *X)
Definition: postgres.h:350
CharGetDatum
static Datum CharGetDatum(char X)
Definition: postgres.h:122
InvalidOid
#define InvalidOid
Definition: postgres_ext.h:36
Oid
unsigned int Oid
Definition: postgres_ext.h:31
quote_literal_cstr
char * quote_literal_cstr(const char *rawstr)
Definition: quote.c:103
quote_literal
Datum quote_literal(PG_FUNCTION_ARGS)
Definition: quote.c:78
MemoryContextSwitchTo
MemoryContextSwitchTo(old_ctx)
RelationGetDescr
#define RelationGetDescr(relation)
Definition: rel.h:531
quote_identifier
const char * quote_identifier(const char *ident)
Definition: ruleutils.c:12623
ReplicationSlotValidateName
bool ReplicationSlotValidateName(const char *name, int elevel)
Definition: slot.c:252
ERRCODE_DUPLICATE_OBJECT
#define ERRCODE_DUPLICATE_OBJECT
Definition: streamutil.c:32
destroyStringInfo
void destroyStringInfo(StringInfo str)
Definition: stringinfo.c:361
makeStringInfo
StringInfo makeStringInfo(void)
Definition: stringinfo.c:41
appendStringInfo
void appendStringInfo(StringInfo str, const char *fmt,...)
Definition: stringinfo.c:97
appendStringInfoString
void appendStringInfoString(StringInfo str, const char *s)
Definition: stringinfo.c:182
appendStringInfoChar
void appendStringInfoChar(StringInfo str, char ch)
Definition: stringinfo.c:194
initStringInfo
void initStringInfo(StringInfo str)
Definition: stringinfo.c:59
DefElem::defname
char * defname
Definition: parsenodes.h:815
DefElem::arg
Node * arg
Definition: parsenodes.h:816
HeapTupleData::t_self
ItemPointerData t_self
Definition: htup.h:65
List
Definition: pg_list.h:54
RangeVar::relname
char * relname
Definition: primnodes.h:82
RangeVar::schemaname
char * schemaname
Definition: primnodes.h:79
SubOpts::runasowner
bool runasowner
Definition: subscriptioncmds.c:98
SubOpts::copy_data
bool copy_data
Definition: subscriptioncmds.c:91
SubOpts::specified_opts
bits32 specified_opts
Definition: subscriptioncmds.c:85
SubOpts::disableonerr
bool disableonerr
Definition: subscriptioncmds.c:96
SubOpts::create_slot
bool create_slot
Definition: subscriptioncmds.c:90
SubOpts::synchronous_commit
char * synchronous_commit
Definition: subscriptioncmds.c:87
SubOpts::streaming
char streaming
Definition: subscriptioncmds.c:94
SubOpts::origin
char * origin
Definition: subscriptioncmds.c:100
SubOpts::slot_name
char * slot_name
Definition: subscriptioncmds.c:86
SubOpts::lsn
XLogRecPtr lsn
Definition: subscriptioncmds.c:101
SubOpts::passwordrequired
bool passwordrequired
Definition: subscriptioncmds.c:97
state
Definition: regguts.h:323
SubOpts
struct SubOpts SubOpts
DropSubscription
void DropSubscription(DropSubscriptionStmt *stmt, bool isTopLevel)
Definition: subscriptioncmds.c:1553
SUBOPT_STREAMING
#define SUBOPT_STREAMING
Definition: subscriptioncmds.c:67
defGetStreamingMode
char defGetStreamingMode(DefElem *def)
Definition: subscriptioncmds.c:2386
SUBOPT_CREATE_SLOT
#define SUBOPT_CREATE_SLOT
Definition: subscriptioncmds.c:61
SUBOPT_PASSWORD_REQUIRED
#define SUBOPT_PASSWORD_REQUIRED
Definition: subscriptioncmds.c:70
CreateSubscription
ObjectAddress CreateSubscription(ParseState *pstate, CreateSubscriptionStmt *stmt, bool isTopLevel)
Definition: subscriptioncmds.c:579
SUBOPT_SYNCHRONOUS_COMMIT
#define SUBOPT_SYNCHRONOUS_COMMIT
Definition: subscriptioncmds.c:64
SUBOPT_ENABLED
#define SUBOPT_ENABLED
Definition: subscriptioncmds.c:60
check_duplicates_in_publist
static void check_duplicates_in_publist(List *publist, Datum *datums)
Definition: subscriptioncmds.c:2287
SUBOPT_ORIGIN
#define SUBOPT_ORIGIN
Definition: subscriptioncmds.c:74
publicationListToArray
static Datum publicationListToArray(List *publist)
Definition: subscriptioncmds.c:549
SUBOPT_FAILOVER
#define SUBOPT_FAILOVER
Definition: subscriptioncmds.c:72
get_publications_str
static void get_publications_str(List *publications, StringInfo dest, bool quote_literal)
Definition: subscriptioncmds.c:455
parse_subscription_options
static void parse_subscription_options(ParseState *pstate, List *stmt_options, bits32 supported_opts, SubOpts *opts)
Definition: subscriptioncmds.c:121
check_publications
static void check_publications(WalReceiverConn *wrconn, List *publications)
Definition: subscriptioncmds.c:486
SUBOPT_RUN_AS_OWNER
#define SUBOPT_RUN_AS_OWNER
Definition: subscriptioncmds.c:71
SUBOPT_SLOT_NAME
#define SUBOPT_SLOT_NAME
Definition: subscriptioncmds.c:62
SUBOPT_COPY_DATA
#define SUBOPT_COPY_DATA
Definition: subscriptioncmds.c:63
SUBOPT_TWOPHASE_COMMIT
#define SUBOPT_TWOPHASE_COMMIT
Definition: subscriptioncmds.c:68
AlterSubscription_refresh
static void AlterSubscription_refresh(Subscription *sub, bool copy_data, List *validate_publications)
Definition: subscriptioncmds.c:859
ReportSlotConnectionError
static void ReportSlotConnectionError(List *rstates, Oid subid, char *slotname, char *err)
Definition: subscriptioncmds.c:2243
SUBOPT_DISABLE_ON_ERR
#define SUBOPT_DISABLE_ON_ERR
Definition: subscriptioncmds.c:69
AlterSubscriptionOwner_internal
static void AlterSubscriptionOwner_internal(Relation rel, HeapTuple tup, Oid newOwnerId)
Definition: subscriptioncmds.c:1897
AlterSubscriptionOwner
ObjectAddress AlterSubscriptionOwner(const char *name, Oid newOwnerId)
Definition: subscriptioncmds.c:1957
check_publications_origin
static void check_publications_origin(WalReceiverConn *wrconn, List *publications, bool copydata, char *origin, Oid *subrel_local_oids, int subrel_count, char *subname)
Definition: subscriptioncmds.c:2029
ReplicationSlotDropAtPubNode
void ReplicationSlotDropAtPubNode(WalReceiverConn *wrconn, char *slotname, bool missing_ok)
Definition: subscriptioncmds.c:1842
AlterSubscriptionOwner_oid
void AlterSubscriptionOwner_oid(Oid subid, Oid newOwnerId)
Definition: subscriptioncmds.c:1993
SUBOPT_LSN
#define SUBOPT_LSN
Definition: subscriptioncmds.c:73
merge_publications
static List * merge_publications(List *oldpublist, List *newpublist, bool addpub, const char *subname)
Definition: subscriptioncmds.c:2327
SUBOPT_BINARY
#define SUBOPT_BINARY
Definition: subscriptioncmds.c:66
IsSet
#define IsSet(val, bits)
Definition: subscriptioncmds.c:77
SUBOPT_REFRESH
#define SUBOPT_REFRESH
Definition: subscriptioncmds.c:65
fetch_table_list
static List * fetch_table_list(WalReceiverConn *wrconn, List *publications)
Definition: subscriptioncmds.c:2135
SUBOPT_CONNECT
#define SUBOPT_CONNECT
Definition: subscriptioncmds.c:59
AlterSubscription
ObjectAddress AlterSubscription(ParseState *pstate, AlterSubscriptionStmt *stmt, bool isTopLevel)
Definition: subscriptioncmds.c:1084
superuser_arg
bool superuser_arg(Oid roleid)
Definition: superuser.c:56
superuser
bool superuser(void)
Definition: superuser.c:46
ReleaseSysCache
void ReleaseSysCache(HeapTuple tuple)
Definition: syscache.c:266
SysCacheGetAttr
Datum SysCacheGetAttr(int cacheId, HeapTuple tup, AttrNumber attributeNumber, bool *isNull)
Definition: syscache.c:479
SearchSysCache2
HeapTuple SearchSysCache2(int cacheId, Datum key1, Datum key2)
Definition: syscache.c:229
SysCacheGetAttrNotNull
Datum SysCacheGetAttrNotNull(int cacheId, HeapTuple tup, AttrNumber attributeNumber)
Definition: syscache.c:510
SearchSysCacheCopy1
#define SearchSysCacheCopy1(cacheId, key1)
Definition: syscache.h:86
SearchSysCacheCopy2
#define SearchSysCacheCopy2(cacheId, key1, key2)
Definition: syscache.h:88
GetSysCacheOid2
#define GetSysCacheOid2(cacheId, oidcol, key1, key2)
Definition: syscache.h:106
table_close
void table_close(Relation relation, LOCKMODE lockmode)
Definition: table.c:126
table_open
Relation table_open(Oid relationId, LOCKMODE lockmode)
Definition: table.c:40
ReplicationSlotNameForTablesync
void ReplicationSlotNameForTablesync(Oid suboid, Oid relid, char *syncslotname, Size szslot)
Definition: tablesync.c:1267
UpdateTwoPhaseState
void UpdateTwoPhaseState(Oid suboid, char new_state)
Definition: tablesync.c:1756
tuplestore_gettupleslot
bool tuplestore_gettupleslot(Tuplestorestate *state, bool forward, bool copy, TupleTableSlot *slot)
Definition: tuplestore.c:1078
ExecClearTuple
static TupleTableSlot * ExecClearTuple(TupleTableSlot *slot)
Definition: tuptable.h:454
slot_getattr
static Datum slot_getattr(TupleTableSlot *slot, int attnum, bool *isnull)
Definition: tuptable.h:395
makeString
String * makeString(char *str)
Definition: value.c:63
intVal
#define intVal(v)
Definition: value.h:79
strVal
#define strVal(v)
Definition: value.h:82
name
const char * name
Definition: wait_event_funcs.c:28
wrconn
static WalReceiverConn * wrconn
Definition: walreceiver.c:92
walrcv_alter_slot
#define walrcv_alter_slot(conn, slotname, failover)
Definition: walreceiver.h:458
walrcv_connect
#define walrcv_connect(conninfo, replication, logical, must_use_password, appname, err)
Definition: walreceiver.h:432
WALRCV_OK_COMMAND
@ WALRCV_OK_COMMAND
Definition: walreceiver.h:204
WALRCV_ERROR
@ WALRCV_ERROR
Definition: walreceiver.h:203
WALRCV_OK_TUPLES
@ WALRCV_OK_TUPLES
Definition: walreceiver.h:206
walrcv_create_slot
#define walrcv_create_slot(conn, slotname, temporary, two_phase, failover, snapshot_action, lsn)
Definition: walreceiver.h:456
walrcv_clear_result
static void walrcv_clear_result(WalRcvExecResult *walres)
Definition: walreceiver.h:468
walrcv_server_version
#define walrcv_server_version(conn)
Definition: walreceiver.h:444
walrcv_check_conninfo
#define walrcv_check_conninfo(conninfo, must_use_password)
Definition: walreceiver.h:434
walrcv_exec
#define walrcv_exec(conn, exec, nRetTypes, retTypes)
Definition: walreceiver.h:462
walrcv_disconnect
#define walrcv_disconnect(conn)
Definition: walreceiver.h:464
CRS_NOEXPORT_SNAPSHOT
@ CRS_NOEXPORT_SNAPSHOT
Definition: walsender.h:23
worker_internal.h
PreventInTransactionBlock
void PreventInTransactionBlock(bool isTopLevel, const char *stmtType)
Definition: xact.c:3584
LSN_FORMAT_ARGS
#define LSN_FORMAT_ARGS(lsn)
Definition: xlogdefs.h:43
XLogRecPtrIsInvalid
#define XLogRecPtrIsInvalid(r)
Definition: xlogdefs.h:29
RepOriginId
uint16 RepOriginId
Definition: xlogdefs.h:65
XLogRecPtr
uint64 XLogRecPtr
Definition: xlogdefs.h:21
InvalidXLogRecPtr
#define InvalidXLogRecPtr
Definition: xlogdefs.h:28