Line data Source code
1 : /*
2 : * info.c
3 : *
4 : * information support functions
5 : *
6 : * Copyright (c) 2010-2024, PostgreSQL Global Development Group
7 : * src/bin/pg_upgrade/info.c
8 : */
9 :
10 : #include "postgres_fe.h"
11 :
12 : #include "access/transam.h"
13 : #include "catalog/pg_class_d.h"
14 : #include "pg_upgrade.h"
15 :
16 : static void create_rel_filename_map(const char *old_data, const char *new_data,
17 : const DbInfo *old_db, const DbInfo *new_db,
18 : const RelInfo *old_rel, const RelInfo *new_rel,
19 : FileNameMap *map);
20 : static void report_unmatched_relation(const RelInfo *rel, const DbInfo *db,
21 : bool is_new_db);
22 : static void free_db_and_rel_infos(DbInfoArr *db_arr);
23 : static void get_template0_info(ClusterInfo *cluster);
24 : static void get_db_infos(ClusterInfo *cluster);
25 : static void get_rel_infos(ClusterInfo *cluster, DbInfo *dbinfo);
26 : static void free_rel_infos(RelInfoArr *rel_arr);
27 : static void print_db_infos(DbInfoArr *db_arr);
28 : static void print_rel_infos(RelInfoArr *rel_arr);
29 : static void print_slot_infos(LogicalSlotInfoArr *slot_arr);
30 : static void get_old_cluster_logical_slot_infos(DbInfo *dbinfo, bool live_check);
31 : static void get_db_subscription_count(DbInfo *dbinfo);
32 :
33 :
34 : /*
35 : * gen_db_file_maps()
36 : *
37 : * generates a database mapping from "old_db" to "new_db".
38 : *
39 : * Returns a malloc'ed array of mappings. The length of the array
40 : * is returned into *nmaps.
41 : */
42 : FileNameMap *
43 20 : gen_db_file_maps(DbInfo *old_db, DbInfo *new_db,
44 : int *nmaps,
45 : const char *old_pgdata, const char *new_pgdata)
46 : {
47 : FileNameMap *maps;
48 : int old_relnum,
49 : new_relnum;
50 20 : int num_maps = 0;
51 20 : bool all_matched = true;
52 :
53 : /* There will certainly not be more mappings than there are old rels */
54 20 : maps = (FileNameMap *) pg_malloc(sizeof(FileNameMap) *
55 20 : old_db->rel_arr.nrels);
56 :
57 : /*
58 : * Each of the RelInfo arrays should be sorted by OID. Scan through them
59 : * and match them up. If we fail to match everything, we'll abort, but
60 : * first print as much info as we can about mismatches.
61 : */
62 20 : old_relnum = new_relnum = 0;
63 2756 : while (old_relnum < old_db->rel_arr.nrels ||
64 20 : new_relnum < new_db->rel_arr.nrels)
65 : {
66 5472 : RelInfo *old_rel = (old_relnum < old_db->rel_arr.nrels) ?
67 2736 : &old_db->rel_arr.rels[old_relnum] : NULL;
68 5472 : RelInfo *new_rel = (new_relnum < new_db->rel_arr.nrels) ?
69 2736 : &new_db->rel_arr.rels[new_relnum] : NULL;
70 :
71 : /* handle running off one array before the other */
72 2736 : if (!new_rel)
73 : {
74 : /*
75 : * old_rel is unmatched. This should never happen, because we
76 : * force new rels to have TOAST tables if the old one did.
77 : */
78 0 : report_unmatched_relation(old_rel, old_db, false);
79 0 : all_matched = false;
80 0 : old_relnum++;
81 0 : continue;
82 : }
83 2736 : if (!old_rel)
84 : {
85 : /*
86 : * new_rel is unmatched. This shouldn't really happen either, but
87 : * if it's a TOAST table, we can ignore it and continue
88 : * processing, assuming that the new server made a TOAST table
89 : * that wasn't needed.
90 : */
91 0 : if (strcmp(new_rel->nspname, "pg_toast") != 0)
92 : {
93 0 : report_unmatched_relation(new_rel, new_db, true);
94 0 : all_matched = false;
95 : }
96 0 : new_relnum++;
97 0 : continue;
98 : }
99 :
100 : /* check for mismatched OID */
101 2736 : if (old_rel->reloid < new_rel->reloid)
102 : {
103 : /* old_rel is unmatched, see comment above */
104 0 : report_unmatched_relation(old_rel, old_db, false);
105 0 : all_matched = false;
106 0 : old_relnum++;
107 0 : continue;
108 : }
109 2736 : else if (old_rel->reloid > new_rel->reloid)
110 : {
111 : /* new_rel is unmatched, see comment above */
112 0 : if (strcmp(new_rel->nspname, "pg_toast") != 0)
113 : {
114 0 : report_unmatched_relation(new_rel, new_db, true);
115 0 : all_matched = false;
116 : }
117 0 : new_relnum++;
118 0 : continue;
119 : }
120 :
121 : /*
122 : * Verify that rels of same OID have same name. The namespace name
123 : * should always match, but the relname might not match for TOAST
124 : * tables (and, therefore, their indexes).
125 : */
126 2736 : if (strcmp(old_rel->nspname, new_rel->nspname) != 0 ||
127 2736 : strcmp(old_rel->relname, new_rel->relname) != 0)
128 : {
129 0 : pg_log(PG_WARNING, "Relation names for OID %u in database \"%s\" do not match: "
130 : "old name \"%s.%s\", new name \"%s.%s\"",
131 : old_rel->reloid, old_db->db_name,
132 : old_rel->nspname, old_rel->relname,
133 : new_rel->nspname, new_rel->relname);
134 0 : all_matched = false;
135 0 : old_relnum++;
136 0 : new_relnum++;
137 0 : continue;
138 : }
139 :
140 : /* OK, create a mapping entry */
141 2736 : create_rel_filename_map(old_pgdata, new_pgdata, old_db, new_db,
142 2736 : old_rel, new_rel, maps + num_maps);
143 2736 : num_maps++;
144 2736 : old_relnum++;
145 2736 : new_relnum++;
146 : }
147 :
148 20 : if (!all_matched)
149 0 : pg_fatal("Failed to match up old and new tables in database \"%s\"",
150 : old_db->db_name);
151 :
152 20 : *nmaps = num_maps;
153 20 : return maps;
154 : }
155 :
156 :
157 : /*
158 : * create_rel_filename_map()
159 : *
160 : * fills a file node map structure and returns it in "map".
161 : */
162 : static void
163 2736 : create_rel_filename_map(const char *old_data, const char *new_data,
164 : const DbInfo *old_db, const DbInfo *new_db,
165 : const RelInfo *old_rel, const RelInfo *new_rel,
166 : FileNameMap *map)
167 : {
168 : /* In case old/new tablespaces don't match, do them separately. */
169 2736 : if (strlen(old_rel->tablespace) == 0)
170 : {
171 : /*
172 : * relation belongs to the default tablespace, hence relfiles should
173 : * exist in the data directories.
174 : */
175 2736 : map->old_tablespace = old_data;
176 2736 : map->old_tablespace_suffix = "/base";
177 : }
178 : else
179 : {
180 : /* relation belongs to a tablespace, so use the tablespace location */
181 0 : map->old_tablespace = old_rel->tablespace;
182 0 : map->old_tablespace_suffix = old_cluster.tablespace_suffix;
183 : }
184 :
185 : /* Do the same for new tablespaces */
186 2736 : if (strlen(new_rel->tablespace) == 0)
187 : {
188 2736 : map->new_tablespace = new_data;
189 2736 : map->new_tablespace_suffix = "/base";
190 : }
191 : else
192 : {
193 0 : map->new_tablespace = new_rel->tablespace;
194 0 : map->new_tablespace_suffix = new_cluster.tablespace_suffix;
195 : }
196 :
197 : /* DB oid and relfilenumbers are preserved between old and new cluster */
198 2736 : map->db_oid = old_db->db_oid;
199 2736 : map->relfilenumber = old_rel->relfilenumber;
200 :
201 : /* used only for logging and error reporting, old/new are identical */
202 2736 : map->nspname = old_rel->nspname;
203 2736 : map->relname = old_rel->relname;
204 2736 : }
205 :
206 :
207 : /*
208 : * Complain about a relation we couldn't match to the other database,
209 : * identifying it as best we can.
210 : */
211 : static void
212 0 : report_unmatched_relation(const RelInfo *rel, const DbInfo *db, bool is_new_db)
213 : {
214 0 : Oid reloid = rel->reloid; /* we might change rel below */
215 : char reldesc[1000];
216 : int i;
217 :
218 0 : snprintf(reldesc, sizeof(reldesc), "\"%s.%s\"",
219 : rel->nspname, rel->relname);
220 0 : if (rel->indtable)
221 : {
222 0 : for (i = 0; i < db->rel_arr.nrels; i++)
223 : {
224 0 : const RelInfo *hrel = &db->rel_arr.rels[i];
225 :
226 0 : if (hrel->reloid == rel->indtable)
227 : {
228 0 : snprintf(reldesc + strlen(reldesc),
229 0 : sizeof(reldesc) - strlen(reldesc),
230 0 : _(" which is an index on \"%s.%s\""),
231 : hrel->nspname, hrel->relname);
232 : /* Shift attention to index's table for toast check */
233 0 : rel = hrel;
234 0 : break;
235 : }
236 : }
237 0 : if (i >= db->rel_arr.nrels)
238 0 : snprintf(reldesc + strlen(reldesc),
239 0 : sizeof(reldesc) - strlen(reldesc),
240 0 : _(" which is an index on OID %u"), rel->indtable);
241 : }
242 0 : if (rel->toastheap)
243 : {
244 0 : for (i = 0; i < db->rel_arr.nrels; i++)
245 : {
246 0 : const RelInfo *brel = &db->rel_arr.rels[i];
247 :
248 0 : if (brel->reloid == rel->toastheap)
249 : {
250 0 : snprintf(reldesc + strlen(reldesc),
251 0 : sizeof(reldesc) - strlen(reldesc),
252 0 : _(" which is the TOAST table for \"%s.%s\""),
253 : brel->nspname, brel->relname);
254 0 : break;
255 : }
256 : }
257 0 : if (i >= db->rel_arr.nrels)
258 0 : snprintf(reldesc + strlen(reldesc),
259 0 : sizeof(reldesc) - strlen(reldesc),
260 0 : _(" which is the TOAST table for OID %u"), rel->toastheap);
261 : }
262 :
263 0 : if (is_new_db)
264 0 : pg_log(PG_WARNING, "No match found in old cluster for new relation with OID %u in database \"%s\": %s",
265 : reloid, db->db_name, reldesc);
266 : else
267 0 : pg_log(PG_WARNING, "No match found in new cluster for old relation with OID %u in database \"%s\": %s",
268 : reloid, db->db_name, reldesc);
269 0 : }
270 :
271 : /*
272 : * get_db_rel_and_slot_infos()
273 : *
274 : * higher level routine to generate dbinfos for the database running
275 : * on the given "port". Assumes that server is already running.
276 : *
277 : * live_check would be used only when the target is the old cluster.
278 : */
279 : void
280 36 : get_db_rel_and_slot_infos(ClusterInfo *cluster, bool live_check)
281 : {
282 : int dbnum;
283 :
284 36 : if (cluster->dbarr.dbs != NULL)
285 6 : free_db_and_rel_infos(&cluster->dbarr);
286 :
287 36 : get_template0_info(cluster);
288 36 : get_db_infos(cluster);
289 :
290 140 : for (dbnum = 0; dbnum < cluster->dbarr.ndbs; dbnum++)
291 : {
292 106 : DbInfo *pDbInfo = &cluster->dbarr.dbs[dbnum];
293 :
294 106 : get_rel_infos(cluster, pDbInfo);
295 :
296 : /*
297 : * Retrieve the logical replication slots infos and the subscriptions
298 : * count for the old cluster.
299 : */
300 104 : if (cluster == &old_cluster)
301 : {
302 60 : get_old_cluster_logical_slot_infos(pDbInfo, live_check);
303 60 : get_db_subscription_count(pDbInfo);
304 : }
305 : }
306 :
307 34 : if (cluster == &old_cluster)
308 16 : pg_log(PG_VERBOSE, "\nsource databases:");
309 : else
310 18 : pg_log(PG_VERBOSE, "\ntarget databases:");
311 :
312 34 : if (log_opts.verbose)
313 0 : print_db_infos(&cluster->dbarr);
314 34 : }
315 :
316 :
317 : /*
318 : * Get information about template0, which will be copied from the old cluster
319 : * to the new cluster.
320 : */
321 : static void
322 36 : get_template0_info(ClusterInfo *cluster)
323 : {
324 36 : PGconn *conn = connectToServer(cluster, "template1");
325 : DbLocaleInfo *locale;
326 : PGresult *dbres;
327 : int i_datencoding;
328 : int i_datlocprovider;
329 : int i_datcollate;
330 : int i_datctype;
331 : int i_datlocale;
332 :
333 36 : if (GET_MAJOR_VERSION(cluster->major_version) >= 1700)
334 36 : dbres = executeQueryOrDie(conn,
335 : "SELECT encoding, datlocprovider, "
336 : " datcollate, datctype, datlocale "
337 : "FROM pg_catalog.pg_database "
338 : "WHERE datname='template0'");
339 0 : else if (GET_MAJOR_VERSION(cluster->major_version) >= 1500)
340 0 : dbres = executeQueryOrDie(conn,
341 : "SELECT encoding, datlocprovider, "
342 : " datcollate, datctype, daticulocale AS datlocale "
343 : "FROM pg_catalog.pg_database "
344 : "WHERE datname='template0'");
345 : else
346 0 : dbres = executeQueryOrDie(conn,
347 : "SELECT encoding, 'c' AS datlocprovider, "
348 : " datcollate, datctype, NULL AS datlocale "
349 : "FROM pg_catalog.pg_database "
350 : "WHERE datname='template0'");
351 :
352 :
353 36 : if (PQntuples(dbres) != 1)
354 0 : pg_fatal("template0 not found");
355 :
356 36 : locale = pg_malloc(sizeof(DbLocaleInfo));
357 :
358 36 : i_datencoding = PQfnumber(dbres, "encoding");
359 36 : i_datlocprovider = PQfnumber(dbres, "datlocprovider");
360 36 : i_datcollate = PQfnumber(dbres, "datcollate");
361 36 : i_datctype = PQfnumber(dbres, "datctype");
362 36 : i_datlocale = PQfnumber(dbres, "datlocale");
363 :
364 36 : locale->db_encoding = atoi(PQgetvalue(dbres, 0, i_datencoding));
365 36 : locale->db_collprovider = PQgetvalue(dbres, 0, i_datlocprovider)[0];
366 36 : locale->db_collate = pg_strdup(PQgetvalue(dbres, 0, i_datcollate));
367 36 : locale->db_ctype = pg_strdup(PQgetvalue(dbres, 0, i_datctype));
368 36 : if (PQgetisnull(dbres, 0, i_datlocale))
369 28 : locale->db_locale = NULL;
370 : else
371 8 : locale->db_locale = pg_strdup(PQgetvalue(dbres, 0, i_datlocale));
372 :
373 36 : cluster->template0 = locale;
374 :
375 36 : PQclear(dbres);
376 36 : PQfinish(conn);
377 36 : }
378 :
379 :
380 : /*
381 : * get_db_infos()
382 : *
383 : * Scans pg_database system catalog and populates all user
384 : * databases.
385 : */
386 : static void
387 36 : get_db_infos(ClusterInfo *cluster)
388 : {
389 36 : PGconn *conn = connectToServer(cluster, "template1");
390 : PGresult *res;
391 : int ntups;
392 : int tupnum;
393 : DbInfo *dbinfos;
394 : int i_datname,
395 : i_oid,
396 : i_spclocation;
397 : char query[QUERY_ALLOC];
398 :
399 36 : snprintf(query, sizeof(query),
400 : "SELECT d.oid, d.datname, d.encoding, d.datcollate, d.datctype, ");
401 36 : if (GET_MAJOR_VERSION(cluster->major_version) >= 1700)
402 36 : snprintf(query + strlen(query), sizeof(query) - strlen(query),
403 : "datlocprovider, datlocale, ");
404 0 : else if (GET_MAJOR_VERSION(cluster->major_version) >= 1500)
405 0 : snprintf(query + strlen(query), sizeof(query) - strlen(query),
406 : "datlocprovider, daticulocale AS datlocale, ");
407 : else
408 0 : snprintf(query + strlen(query), sizeof(query) - strlen(query),
409 : "'c' AS datlocprovider, NULL AS datlocale, ");
410 36 : snprintf(query + strlen(query), sizeof(query) - strlen(query),
411 : "pg_catalog.pg_tablespace_location(t.oid) AS spclocation "
412 : "FROM pg_catalog.pg_database d "
413 : " LEFT OUTER JOIN pg_catalog.pg_tablespace t "
414 : " ON d.dattablespace = t.oid "
415 : "WHERE d.datallowconn = true "
416 : "ORDER BY 1");
417 :
418 36 : res = executeQueryOrDie(conn, "%s", query);
419 :
420 36 : i_oid = PQfnumber(res, "oid");
421 36 : i_datname = PQfnumber(res, "datname");
422 36 : i_spclocation = PQfnumber(res, "spclocation");
423 :
424 36 : ntups = PQntuples(res);
425 36 : dbinfos = (DbInfo *) pg_malloc0(sizeof(DbInfo) * ntups);
426 :
427 142 : for (tupnum = 0; tupnum < ntups; tupnum++)
428 : {
429 106 : dbinfos[tupnum].db_oid = atooid(PQgetvalue(res, tupnum, i_oid));
430 106 : dbinfos[tupnum].db_name = pg_strdup(PQgetvalue(res, tupnum, i_datname));
431 106 : snprintf(dbinfos[tupnum].db_tablespace, sizeof(dbinfos[tupnum].db_tablespace), "%s",
432 : PQgetvalue(res, tupnum, i_spclocation));
433 : }
434 36 : PQclear(res);
435 :
436 36 : PQfinish(conn);
437 :
438 36 : cluster->dbarr.dbs = dbinfos;
439 36 : cluster->dbarr.ndbs = ntups;
440 36 : }
441 :
442 :
443 : /*
444 : * get_rel_infos()
445 : *
446 : * gets the relinfos for all the user tables and indexes of the database
447 : * referred to by "dbinfo".
448 : *
449 : * Note: the resulting RelInfo array is assumed to be sorted by OID.
450 : * This allows later processing to match up old and new databases efficiently.
451 : */
452 : static void
453 106 : get_rel_infos(ClusterInfo *cluster, DbInfo *dbinfo)
454 : {
455 106 : PGconn *conn = connectToServer(cluster,
456 106 : dbinfo->db_name);
457 : PGresult *res;
458 : RelInfo *relinfos;
459 : int ntups;
460 : int relnum;
461 104 : int num_rels = 0;
462 104 : char *nspname = NULL;
463 104 : char *relname = NULL;
464 104 : char *tablespace = NULL;
465 : int i_spclocation,
466 : i_nspname,
467 : i_relname,
468 : i_reloid,
469 : i_indtable,
470 : i_toastheap,
471 : i_relfilenumber,
472 : i_reltablespace;
473 : char query[QUERY_ALLOC];
474 104 : char *last_namespace = NULL,
475 104 : *last_tablespace = NULL;
476 :
477 104 : query[0] = '\0'; /* initialize query string to empty */
478 :
479 : /*
480 : * Create a CTE that collects OIDs of regular user tables and matviews,
481 : * but excluding toast tables and indexes. We assume that relations with
482 : * OIDs >= FirstNormalObjectId belong to the user. (That's probably
483 : * redundant with the namespace-name exclusions, but let's be safe.)
484 : *
485 : * pg_largeobject contains user data that does not appear in pg_dump
486 : * output, so we have to copy that system table. It's easiest to do that
487 : * by treating it as a user table.
488 : */
489 104 : snprintf(query + strlen(query), sizeof(query) - strlen(query),
490 : "WITH regular_heap (reloid, indtable, toastheap) AS ( "
491 : " SELECT c.oid, 0::oid, 0::oid "
492 : " FROM pg_catalog.pg_class c JOIN pg_catalog.pg_namespace n "
493 : " ON c.relnamespace = n.oid "
494 : " WHERE relkind IN (" CppAsString2(RELKIND_RELATION) ", "
495 : CppAsString2(RELKIND_MATVIEW) ") AND "
496 : /* exclude possible orphaned temp tables */
497 : " ((n.nspname !~ '^pg_temp_' AND "
498 : " n.nspname !~ '^pg_toast_temp_' AND "
499 : " n.nspname NOT IN ('pg_catalog', 'information_schema', "
500 : " 'binary_upgrade', 'pg_toast') AND "
501 : " c.oid >= %u::pg_catalog.oid) OR "
502 : " (n.nspname = 'pg_catalog' AND "
503 : " relname IN ('pg_largeobject') ))), ",
504 : FirstNormalObjectId);
505 :
506 : /*
507 : * Add a CTE that collects OIDs of toast tables belonging to the tables
508 : * selected by the regular_heap CTE. (We have to do this separately
509 : * because the namespace-name rules above don't work for toast tables.)
510 : */
511 104 : snprintf(query + strlen(query), sizeof(query) - strlen(query),
512 : " toast_heap (reloid, indtable, toastheap) AS ( "
513 : " SELECT c.reltoastrelid, 0::oid, c.oid "
514 : " FROM regular_heap JOIN pg_catalog.pg_class c "
515 : " ON regular_heap.reloid = c.oid "
516 : " WHERE c.reltoastrelid != 0), ");
517 :
518 : /*
519 : * Add a CTE that collects OIDs of all valid indexes on the previously
520 : * selected tables. We can ignore invalid indexes since pg_dump does.
521 : * Testing indisready is necessary in 9.2, and harmless in earlier/later
522 : * versions.
523 : */
524 104 : snprintf(query + strlen(query), sizeof(query) - strlen(query),
525 : " all_index (reloid, indtable, toastheap) AS ( "
526 : " SELECT indexrelid, indrelid, 0::oid "
527 : " FROM pg_catalog.pg_index "
528 : " WHERE indisvalid AND indisready "
529 : " AND indrelid IN "
530 : " (SELECT reloid FROM regular_heap "
531 : " UNION ALL "
532 : " SELECT reloid FROM toast_heap)) ");
533 :
534 : /*
535 : * And now we can write the query that retrieves the data we want for each
536 : * heap and index relation. Make sure result is sorted by OID.
537 : */
538 104 : snprintf(query + strlen(query), sizeof(query) - strlen(query),
539 : "SELECT all_rels.*, n.nspname, c.relname, "
540 : " c.relfilenode, c.reltablespace, "
541 : " pg_catalog.pg_tablespace_location(t.oid) AS spclocation "
542 : "FROM (SELECT * FROM regular_heap "
543 : " UNION ALL "
544 : " SELECT * FROM toast_heap "
545 : " UNION ALL "
546 : " SELECT * FROM all_index) all_rels "
547 : " JOIN pg_catalog.pg_class c "
548 : " ON all_rels.reloid = c.oid "
549 : " JOIN pg_catalog.pg_namespace n "
550 : " ON c.relnamespace = n.oid "
551 : " LEFT OUTER JOIN pg_catalog.pg_tablespace t "
552 : " ON c.reltablespace = t.oid "
553 : "ORDER BY 1;");
554 :
555 104 : res = executeQueryOrDie(conn, "%s", query);
556 :
557 104 : ntups = PQntuples(res);
558 :
559 104 : relinfos = (RelInfo *) pg_malloc(sizeof(RelInfo) * ntups);
560 :
561 104 : i_reloid = PQfnumber(res, "reloid");
562 104 : i_indtable = PQfnumber(res, "indtable");
563 104 : i_toastheap = PQfnumber(res, "toastheap");
564 104 : i_nspname = PQfnumber(res, "nspname");
565 104 : i_relname = PQfnumber(res, "relname");
566 104 : i_relfilenumber = PQfnumber(res, "relfilenode");
567 104 : i_reltablespace = PQfnumber(res, "reltablespace");
568 104 : i_spclocation = PQfnumber(res, "spclocation");
569 :
570 11090 : for (relnum = 0; relnum < ntups; relnum++)
571 : {
572 10986 : RelInfo *curr = &relinfos[num_rels++];
573 :
574 10986 : curr->reloid = atooid(PQgetvalue(res, relnum, i_reloid));
575 10986 : curr->indtable = atooid(PQgetvalue(res, relnum, i_indtable));
576 10986 : curr->toastheap = atooid(PQgetvalue(res, relnum, i_toastheap));
577 :
578 10986 : nspname = PQgetvalue(res, relnum, i_nspname);
579 10986 : curr->nsp_alloc = false;
580 :
581 : /*
582 : * Many of the namespace and tablespace strings are identical, so we
583 : * try to reuse the allocated string pointers where possible to reduce
584 : * memory consumption.
585 : */
586 : /* Can we reuse the previous string allocation? */
587 10986 : if (last_namespace && strcmp(nspname, last_namespace) == 0)
588 6862 : curr->nspname = last_namespace;
589 : else
590 : {
591 4124 : last_namespace = curr->nspname = pg_strdup(nspname);
592 4124 : curr->nsp_alloc = true;
593 : }
594 :
595 10986 : relname = PQgetvalue(res, relnum, i_relname);
596 10986 : curr->relname = pg_strdup(relname);
597 :
598 10986 : curr->relfilenumber = atooid(PQgetvalue(res, relnum, i_relfilenumber));
599 10986 : curr->tblsp_alloc = false;
600 :
601 : /* Is the tablespace oid non-default? */
602 10986 : if (atooid(PQgetvalue(res, relnum, i_reltablespace)) != 0)
603 : {
604 : /*
605 : * The tablespace location might be "", meaning the cluster
606 : * default location, i.e. pg_default or pg_global.
607 : */
608 0 : tablespace = PQgetvalue(res, relnum, i_spclocation);
609 :
610 : /* Can we reuse the previous string allocation? */
611 0 : if (last_tablespace && strcmp(tablespace, last_tablespace) == 0)
612 0 : curr->tablespace = last_tablespace;
613 : else
614 : {
615 0 : last_tablespace = curr->tablespace = pg_strdup(tablespace);
616 0 : curr->tblsp_alloc = true;
617 : }
618 : }
619 : else
620 : /* A zero reltablespace oid indicates the database tablespace. */
621 10986 : curr->tablespace = dbinfo->db_tablespace;
622 : }
623 104 : PQclear(res);
624 :
625 104 : PQfinish(conn);
626 :
627 104 : dbinfo->rel_arr.rels = relinfos;
628 104 : dbinfo->rel_arr.nrels = num_rels;
629 104 : }
630 :
631 : /*
632 : * get_old_cluster_logical_slot_infos()
633 : *
634 : * Gets the LogicalSlotInfos for all the logical replication slots of the
635 : * database referred to by "dbinfo". The status of each logical slot is gotten
636 : * here, but they are used at the checking phase. See
637 : * check_old_cluster_for_valid_slots().
638 : *
639 : * Note: This function will not do anything if the old cluster is pre-PG17.
640 : * This is because before that the logical slots are not saved at shutdown, so
641 : * there is no guarantee that the latest confirmed_flush_lsn is saved to disk
642 : * which can lead to data loss. It is still not guaranteed for manually created
643 : * slots in PG17, so subsequent checks done in
644 : * check_old_cluster_for_valid_slots() would raise a FATAL error if such slots
645 : * are included.
646 : */
647 : static void
648 60 : get_old_cluster_logical_slot_infos(DbInfo *dbinfo, bool live_check)
649 : {
650 : PGconn *conn;
651 : PGresult *res;
652 60 : LogicalSlotInfo *slotinfos = NULL;
653 : int num_slots;
654 :
655 : /* Logical slots can be migrated since PG17. */
656 60 : if (GET_MAJOR_VERSION(old_cluster.major_version) <= 1600)
657 0 : return;
658 :
659 60 : conn = connectToServer(&old_cluster, dbinfo->db_name);
660 :
661 : /*
662 : * Fetch the logical replication slot information. The check whether the
663 : * slot is considered caught up is done by an upgrade function. This
664 : * regards the slot as caught up if we don't find any decodable changes.
665 : * See binary_upgrade_logical_slot_has_caught_up().
666 : *
667 : * Note that we can't ensure whether the slot is caught up during
668 : * live_check as the new WAL records could be generated.
669 : *
670 : * We intentionally skip checking the WALs for invalidated slots as the
671 : * corresponding WALs could have been removed for such slots.
672 : *
673 : * The temporary slots are explicitly ignored while checking because such
674 : * slots cannot exist after the upgrade. During the upgrade, clusters are
675 : * started and stopped several times causing any temporary slots to be
676 : * removed.
677 : */
678 60 : res = executeQueryOrDie(conn, "SELECT slot_name, plugin, two_phase, failover, "
679 : "%s as caught_up, invalidation_reason IS NOT NULL as invalid "
680 : "FROM pg_catalog.pg_replication_slots "
681 : "WHERE slot_type = 'logical' AND "
682 : "database = current_database() AND "
683 : "temporary IS FALSE;",
684 : live_check ? "FALSE" :
685 : "(CASE WHEN invalidation_reason IS NOT NULL THEN FALSE "
686 : "ELSE (SELECT pg_catalog.binary_upgrade_logical_slot_has_caught_up(slot_name)) "
687 : "END)");
688 :
689 60 : num_slots = PQntuples(res);
690 :
691 60 : if (num_slots)
692 : {
693 : int i_slotname;
694 : int i_plugin;
695 : int i_twophase;
696 : int i_failover;
697 : int i_caught_up;
698 : int i_invalid;
699 :
700 6 : slotinfos = (LogicalSlotInfo *) pg_malloc(sizeof(LogicalSlotInfo) * num_slots);
701 :
702 6 : i_slotname = PQfnumber(res, "slot_name");
703 6 : i_plugin = PQfnumber(res, "plugin");
704 6 : i_twophase = PQfnumber(res, "two_phase");
705 6 : i_failover = PQfnumber(res, "failover");
706 6 : i_caught_up = PQfnumber(res, "caught_up");
707 6 : i_invalid = PQfnumber(res, "invalid");
708 :
709 16 : for (int slotnum = 0; slotnum < num_slots; slotnum++)
710 : {
711 10 : LogicalSlotInfo *curr = &slotinfos[slotnum];
712 :
713 10 : curr->slotname = pg_strdup(PQgetvalue(res, slotnum, i_slotname));
714 10 : curr->plugin = pg_strdup(PQgetvalue(res, slotnum, i_plugin));
715 10 : curr->two_phase = (strcmp(PQgetvalue(res, slotnum, i_twophase), "t") == 0);
716 10 : curr->failover = (strcmp(PQgetvalue(res, slotnum, i_failover), "t") == 0);
717 10 : curr->caught_up = (strcmp(PQgetvalue(res, slotnum, i_caught_up), "t") == 0);
718 10 : curr->invalid = (strcmp(PQgetvalue(res, slotnum, i_invalid), "t") == 0);
719 : }
720 : }
721 :
722 60 : PQclear(res);
723 60 : PQfinish(conn);
724 :
725 60 : dbinfo->slot_arr.slots = slotinfos;
726 60 : dbinfo->slot_arr.nslots = num_slots;
727 : }
728 :
729 :
730 : /*
731 : * count_old_cluster_logical_slots()
732 : *
733 : * Returns the number of logical replication slots for all databases.
734 : *
735 : * Note: this function always returns 0 if the old_cluster is PG16 and prior
736 : * because we gather slot information only for cluster versions greater than or
737 : * equal to PG17. See get_old_cluster_logical_slot_infos().
738 : */
739 : int
740 34 : count_old_cluster_logical_slots(void)
741 : {
742 34 : int slot_count = 0;
743 :
744 142 : for (int dbnum = 0; dbnum < old_cluster.dbarr.ndbs; dbnum++)
745 108 : slot_count += old_cluster.dbarr.dbs[dbnum].slot_arr.nslots;
746 :
747 34 : return slot_count;
748 : }
749 :
750 : /*
751 : * get_db_subscription_count()
752 : *
753 : * Gets the number of subscriptions in the database referred to by "dbinfo".
754 : *
755 : * Note: This function will not do anything if the old cluster is pre-PG17.
756 : * This is because before that the logical slots are not upgraded, so we will
757 : * not be able to upgrade the logical replication clusters completely.
758 : */
759 : static void
760 60 : get_db_subscription_count(DbInfo *dbinfo)
761 : {
762 : PGconn *conn;
763 : PGresult *res;
764 :
765 : /* Subscriptions can be migrated since PG17. */
766 60 : if (GET_MAJOR_VERSION(old_cluster.major_version) < 1700)
767 0 : return;
768 :
769 60 : conn = connectToServer(&old_cluster, dbinfo->db_name);
770 60 : res = executeQueryOrDie(conn, "SELECT count(*) "
771 : "FROM pg_catalog.pg_subscription WHERE subdbid = %u",
772 : dbinfo->db_oid);
773 60 : dbinfo->nsubs = atoi(PQgetvalue(res, 0, 0));
774 :
775 60 : PQclear(res);
776 60 : PQfinish(conn);
777 : }
778 :
779 : /*
780 : * count_old_cluster_subscriptions()
781 : *
782 : * Returns the number of subscriptions for all databases.
783 : *
784 : * Note: this function always returns 0 if the old_cluster is PG16 and prior
785 : * because we gather subscriptions only for cluster versions greater than or
786 : * equal to PG17. See get_db_subscription_count().
787 : */
788 : int
789 10 : count_old_cluster_subscriptions(void)
790 : {
791 10 : int nsubs = 0;
792 :
793 46 : for (int dbnum = 0; dbnum < old_cluster.dbarr.ndbs; dbnum++)
794 36 : nsubs += old_cluster.dbarr.dbs[dbnum].nsubs;
795 :
796 10 : return nsubs;
797 : }
798 :
799 : static void
800 6 : free_db_and_rel_infos(DbInfoArr *db_arr)
801 : {
802 : int dbnum;
803 :
804 18 : for (dbnum = 0; dbnum < db_arr->ndbs; dbnum++)
805 : {
806 12 : free_rel_infos(&db_arr->dbs[dbnum].rel_arr);
807 12 : pg_free(db_arr->dbs[dbnum].db_name);
808 : }
809 6 : pg_free(db_arr->dbs);
810 6 : db_arr->dbs = NULL;
811 6 : db_arr->ndbs = 0;
812 6 : }
813 :
814 :
815 : static void
816 12 : free_rel_infos(RelInfoArr *rel_arr)
817 : {
818 : int relnum;
819 :
820 36 : for (relnum = 0; relnum < rel_arr->nrels; relnum++)
821 : {
822 24 : if (rel_arr->rels[relnum].nsp_alloc)
823 12 : pg_free(rel_arr->rels[relnum].nspname);
824 24 : pg_free(rel_arr->rels[relnum].relname);
825 24 : if (rel_arr->rels[relnum].tblsp_alloc)
826 0 : pg_free(rel_arr->rels[relnum].tablespace);
827 : }
828 12 : pg_free(rel_arr->rels);
829 12 : rel_arr->nrels = 0;
830 12 : }
831 :
832 :
833 : static void
834 0 : print_db_infos(DbInfoArr *db_arr)
835 : {
836 : int dbnum;
837 :
838 0 : for (dbnum = 0; dbnum < db_arr->ndbs; dbnum++)
839 : {
840 0 : DbInfo *pDbInfo = &db_arr->dbs[dbnum];
841 :
842 0 : pg_log(PG_VERBOSE, "Database: \"%s\"", pDbInfo->db_name);
843 0 : print_rel_infos(&pDbInfo->rel_arr);
844 0 : print_slot_infos(&pDbInfo->slot_arr);
845 : }
846 0 : }
847 :
848 :
849 : static void
850 0 : print_rel_infos(RelInfoArr *rel_arr)
851 : {
852 : int relnum;
853 :
854 0 : for (relnum = 0; relnum < rel_arr->nrels; relnum++)
855 0 : pg_log(PG_VERBOSE, "relname: \"%s.%s\", reloid: %u, reltblspace: \"%s\"",
856 0 : rel_arr->rels[relnum].nspname,
857 0 : rel_arr->rels[relnum].relname,
858 0 : rel_arr->rels[relnum].reloid,
859 0 : rel_arr->rels[relnum].tablespace);
860 0 : }
861 :
862 : static void
863 0 : print_slot_infos(LogicalSlotInfoArr *slot_arr)
864 : {
865 : /* Quick return if there are no logical slots. */
866 0 : if (slot_arr->nslots == 0)
867 0 : return;
868 :
869 0 : pg_log(PG_VERBOSE, "Logical replication slots within the database:");
870 :
871 0 : for (int slotnum = 0; slotnum < slot_arr->nslots; slotnum++)
872 : {
873 0 : LogicalSlotInfo *slot_info = &slot_arr->slots[slotnum];
874 :
875 0 : pg_log(PG_VERBOSE, "slot_name: \"%s\", plugin: \"%s\", two_phase: %s",
876 : slot_info->slotname,
877 : slot_info->plugin,
878 0 : slot_info->two_phase ? "true" : "false");
879 : }
880 : }
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