Line data Source code
1 : /*
2 : * info.c
3 : *
4 : * information support functions
5 : *
6 : * Copyright (c) 2010-2025, 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 : #include "pqexpbuffer.h"
16 :
17 : static void create_rel_filename_map(const char *old_data, const char *new_data,
18 : const DbInfo *old_db, const DbInfo *new_db,
19 : const RelInfo *old_rel, const RelInfo *new_rel,
20 : FileNameMap *map);
21 : static void report_unmatched_relation(const RelInfo *rel, const DbInfo *db,
22 : bool is_new_db);
23 : static void free_db_and_rel_infos(DbInfoArr *db_arr);
24 : static void get_template0_info(ClusterInfo *cluster);
25 : static void get_db_infos(ClusterInfo *cluster);
26 : static char *get_rel_infos_query(void);
27 : static void process_rel_infos(DbInfo *dbinfo, PGresult *res, void *arg);
28 : static void free_rel_infos(RelInfoArr *rel_arr);
29 : static void print_db_infos(DbInfoArr *db_arr);
30 : static void print_rel_infos(RelInfoArr *rel_arr);
31 : static void print_slot_infos(LogicalSlotInfoArr *slot_arr);
32 : static char *get_old_cluster_logical_slot_infos_query(void);
33 : static void process_old_cluster_logical_slot_infos(DbInfo *dbinfo, PGresult *res, void *arg);
34 :
35 :
36 : /*
37 : * gen_db_file_maps()
38 : *
39 : * generates a database mapping from "old_db" to "new_db".
40 : *
41 : * Returns a malloc'ed array of mappings. The length of the array
42 : * is returned into *nmaps.
43 : */
44 : FileNameMap *
45 20 : gen_db_file_maps(DbInfo *old_db, DbInfo *new_db,
46 : int *nmaps,
47 : const char *old_pgdata, const char *new_pgdata)
48 : {
49 : FileNameMap *maps;
50 : int old_relnum,
51 : new_relnum;
52 20 : int num_maps = 0;
53 20 : bool all_matched = true;
54 :
55 : /* There will certainly not be more mappings than there are old rels */
56 20 : maps = (FileNameMap *) pg_malloc(sizeof(FileNameMap) *
57 20 : old_db->rel_arr.nrels);
58 :
59 : /*
60 : * Each of the RelInfo arrays should be sorted by OID. Scan through them
61 : * and match them up. If we fail to match everything, we'll abort, but
62 : * first print as much info as we can about mismatches.
63 : */
64 20 : old_relnum = new_relnum = 0;
65 2742 : while (old_relnum < old_db->rel_arr.nrels ||
66 20 : new_relnum < new_db->rel_arr.nrels)
67 : {
68 5444 : RelInfo *old_rel = (old_relnum < old_db->rel_arr.nrels) ?
69 2722 : &old_db->rel_arr.rels[old_relnum] : NULL;
70 5444 : RelInfo *new_rel = (new_relnum < new_db->rel_arr.nrels) ?
71 2722 : &new_db->rel_arr.rels[new_relnum] : NULL;
72 :
73 : /* handle running off one array before the other */
74 2722 : if (!new_rel)
75 : {
76 : /*
77 : * old_rel is unmatched. This should never happen, because we
78 : * force new rels to have TOAST tables if the old one did.
79 : */
80 0 : report_unmatched_relation(old_rel, old_db, false);
81 0 : all_matched = false;
82 0 : old_relnum++;
83 0 : continue;
84 : }
85 2722 : if (!old_rel)
86 : {
87 : /*
88 : * new_rel is unmatched. This shouldn't really happen either, but
89 : * if it's a TOAST table, we can ignore it and continue
90 : * processing, assuming that the new server made a TOAST table
91 : * that wasn't needed.
92 : */
93 0 : if (strcmp(new_rel->nspname, "pg_toast") != 0)
94 : {
95 0 : report_unmatched_relation(new_rel, new_db, true);
96 0 : all_matched = false;
97 : }
98 0 : new_relnum++;
99 0 : continue;
100 : }
101 :
102 : /* check for mismatched OID */
103 2722 : if (old_rel->reloid < new_rel->reloid)
104 : {
105 : /* old_rel is unmatched, see comment above */
106 0 : report_unmatched_relation(old_rel, old_db, false);
107 0 : all_matched = false;
108 0 : old_relnum++;
109 0 : continue;
110 : }
111 2722 : else if (old_rel->reloid > new_rel->reloid)
112 : {
113 : /* new_rel is unmatched, see comment above */
114 0 : if (strcmp(new_rel->nspname, "pg_toast") != 0)
115 : {
116 0 : report_unmatched_relation(new_rel, new_db, true);
117 0 : all_matched = false;
118 : }
119 0 : new_relnum++;
120 0 : continue;
121 : }
122 :
123 : /*
124 : * Verify that rels of same OID have same name. The namespace name
125 : * should always match, but the relname might not match for TOAST
126 : * tables (and, therefore, their indexes).
127 : */
128 2722 : if (strcmp(old_rel->nspname, new_rel->nspname) != 0 ||
129 2722 : strcmp(old_rel->relname, new_rel->relname) != 0)
130 : {
131 0 : pg_log(PG_WARNING, "Relation names for OID %u in database \"%s\" do not match: "
132 : "old name \"%s.%s\", new name \"%s.%s\"",
133 : old_rel->reloid, old_db->db_name,
134 : old_rel->nspname, old_rel->relname,
135 : new_rel->nspname, new_rel->relname);
136 0 : all_matched = false;
137 0 : old_relnum++;
138 0 : new_relnum++;
139 0 : continue;
140 : }
141 :
142 : /* OK, create a mapping entry */
143 2722 : create_rel_filename_map(old_pgdata, new_pgdata, old_db, new_db,
144 2722 : old_rel, new_rel, maps + num_maps);
145 2722 : num_maps++;
146 2722 : old_relnum++;
147 2722 : new_relnum++;
148 : }
149 :
150 20 : if (!all_matched)
151 0 : pg_fatal("Failed to match up old and new tables in database \"%s\"",
152 : old_db->db_name);
153 :
154 20 : *nmaps = num_maps;
155 20 : return maps;
156 : }
157 :
158 :
159 : /*
160 : * create_rel_filename_map()
161 : *
162 : * fills a file node map structure and returns it in "map".
163 : */
164 : static void
165 2722 : create_rel_filename_map(const char *old_data, const char *new_data,
166 : const DbInfo *old_db, const DbInfo *new_db,
167 : const RelInfo *old_rel, const RelInfo *new_rel,
168 : FileNameMap *map)
169 : {
170 : /* In case old/new tablespaces don't match, do them separately. */
171 2722 : if (strlen(old_rel->tablespace) == 0)
172 : {
173 : /*
174 : * relation belongs to the default tablespace, hence relfiles should
175 : * exist in the data directories.
176 : */
177 2722 : map->old_tablespace = old_data;
178 2722 : map->old_tablespace_suffix = "/base";
179 : }
180 : else
181 : {
182 : /* relation belongs to a tablespace, so use the tablespace location */
183 0 : map->old_tablespace = old_rel->tablespace;
184 0 : map->old_tablespace_suffix = old_cluster.tablespace_suffix;
185 : }
186 :
187 : /* Do the same for new tablespaces */
188 2722 : if (strlen(new_rel->tablespace) == 0)
189 : {
190 2722 : map->new_tablespace = new_data;
191 2722 : map->new_tablespace_suffix = "/base";
192 : }
193 : else
194 : {
195 0 : map->new_tablespace = new_rel->tablespace;
196 0 : map->new_tablespace_suffix = new_cluster.tablespace_suffix;
197 : }
198 :
199 : /* DB oid and relfilenumbers are preserved between old and new cluster */
200 2722 : map->db_oid = old_db->db_oid;
201 2722 : map->relfilenumber = old_rel->relfilenumber;
202 :
203 : /* used only for logging and error reporting, old/new are identical */
204 2722 : map->nspname = old_rel->nspname;
205 2722 : map->relname = old_rel->relname;
206 2722 : }
207 :
208 :
209 : /*
210 : * Complain about a relation we couldn't match to the other database,
211 : * identifying it as best we can.
212 : */
213 : static void
214 0 : report_unmatched_relation(const RelInfo *rel, const DbInfo *db, bool is_new_db)
215 : {
216 0 : Oid reloid = rel->reloid; /* we might change rel below */
217 : char reldesc[1000];
218 : int i;
219 :
220 0 : snprintf(reldesc, sizeof(reldesc), "\"%s.%s\"",
221 : rel->nspname, rel->relname);
222 0 : if (rel->indtable)
223 : {
224 0 : for (i = 0; i < db->rel_arr.nrels; i++)
225 : {
226 0 : const RelInfo *hrel = &db->rel_arr.rels[i];
227 :
228 0 : if (hrel->reloid == rel->indtable)
229 : {
230 0 : snprintf(reldesc + strlen(reldesc),
231 0 : sizeof(reldesc) - strlen(reldesc),
232 0 : _(" which is an index on \"%s.%s\""),
233 : hrel->nspname, hrel->relname);
234 : /* Shift attention to index's table for toast check */
235 0 : rel = hrel;
236 0 : break;
237 : }
238 : }
239 0 : if (i >= db->rel_arr.nrels)
240 0 : snprintf(reldesc + strlen(reldesc),
241 0 : sizeof(reldesc) - strlen(reldesc),
242 0 : _(" which is an index on OID %u"), rel->indtable);
243 : }
244 0 : if (rel->toastheap)
245 : {
246 0 : for (i = 0; i < db->rel_arr.nrels; i++)
247 : {
248 0 : const RelInfo *brel = &db->rel_arr.rels[i];
249 :
250 0 : if (brel->reloid == rel->toastheap)
251 : {
252 0 : snprintf(reldesc + strlen(reldesc),
253 0 : sizeof(reldesc) - strlen(reldesc),
254 0 : _(" which is the TOAST table for \"%s.%s\""),
255 : brel->nspname, brel->relname);
256 0 : break;
257 : }
258 : }
259 0 : if (i >= db->rel_arr.nrels)
260 0 : snprintf(reldesc + strlen(reldesc),
261 0 : sizeof(reldesc) - strlen(reldesc),
262 0 : _(" which is the TOAST table for OID %u"), rel->toastheap);
263 : }
264 :
265 0 : if (is_new_db)
266 0 : pg_log(PG_WARNING, "No match found in old cluster for new relation with OID %u in database \"%s\": %s",
267 : reloid, db->db_name, reldesc);
268 : else
269 0 : pg_log(PG_WARNING, "No match found in new cluster for old relation with OID %u in database \"%s\": %s",
270 : reloid, db->db_name, reldesc);
271 0 : }
272 :
273 : /*
274 : * get_db_rel_and_slot_infos()
275 : *
276 : * higher level routine to generate dbinfos for the database running
277 : * on the given "port". Assumes that server is already running.
278 : */
279 : void
280 34 : get_db_rel_and_slot_infos(ClusterInfo *cluster)
281 : {
282 34 : UpgradeTask *task = upgrade_task_create();
283 34 : char *rel_infos_query = NULL;
284 34 : char *logical_slot_infos_query = NULL;
285 :
286 34 : if (cluster->dbarr.dbs != NULL)
287 6 : free_db_and_rel_infos(&cluster->dbarr);
288 :
289 34 : get_template0_info(cluster);
290 34 : get_db_infos(cluster);
291 :
292 34 : rel_infos_query = get_rel_infos_query();
293 34 : upgrade_task_add_step(task,
294 : rel_infos_query,
295 : process_rel_infos,
296 : true, NULL);
297 :
298 : /*
299 : * Logical slots are only carried over to the new cluster when the old
300 : * cluster is on PG17 or newer. This is because before that the logical
301 : * slots are not saved at shutdown, so there is no guarantee that the
302 : * latest confirmed_flush_lsn is saved to disk which can lead to data
303 : * loss. It is still not guaranteed for manually created slots in PG17, so
304 : * subsequent checks done in check_old_cluster_for_valid_slots() would
305 : * raise a FATAL error if such slots are included.
306 : */
307 34 : if (cluster == &old_cluster &&
308 16 : GET_MAJOR_VERSION(cluster->major_version) > 1600)
309 : {
310 16 : logical_slot_infos_query = get_old_cluster_logical_slot_infos_query();
311 16 : upgrade_task_add_step(task,
312 : logical_slot_infos_query,
313 : process_old_cluster_logical_slot_infos,
314 : true, NULL);
315 : }
316 :
317 34 : upgrade_task_run(task, cluster);
318 34 : upgrade_task_free(task);
319 :
320 34 : pg_free(rel_infos_query);
321 34 : if (logical_slot_infos_query)
322 16 : pg_free(logical_slot_infos_query);
323 :
324 34 : if (cluster == &old_cluster)
325 16 : pg_log(PG_VERBOSE, "\nsource databases:");
326 : else
327 18 : pg_log(PG_VERBOSE, "\ntarget databases:");
328 :
329 34 : if (log_opts.verbose)
330 0 : print_db_infos(&cluster->dbarr);
331 34 : }
332 :
333 :
334 : /*
335 : * Get information about template0, which will be copied from the old cluster
336 : * to the new cluster.
337 : */
338 : static void
339 34 : get_template0_info(ClusterInfo *cluster)
340 : {
341 34 : PGconn *conn = connectToServer(cluster, "template1");
342 : DbLocaleInfo *locale;
343 : PGresult *dbres;
344 : int i_datencoding;
345 : int i_datlocprovider;
346 : int i_datcollate;
347 : int i_datctype;
348 : int i_datlocale;
349 :
350 34 : if (GET_MAJOR_VERSION(cluster->major_version) >= 1700)
351 34 : dbres = executeQueryOrDie(conn,
352 : "SELECT encoding, datlocprovider, "
353 : " datcollate, datctype, datlocale "
354 : "FROM pg_catalog.pg_database "
355 : "WHERE datname='template0'");
356 0 : else if (GET_MAJOR_VERSION(cluster->major_version) >= 1500)
357 0 : dbres = executeQueryOrDie(conn,
358 : "SELECT encoding, datlocprovider, "
359 : " datcollate, datctype, daticulocale AS datlocale "
360 : "FROM pg_catalog.pg_database "
361 : "WHERE datname='template0'");
362 : else
363 0 : dbres = executeQueryOrDie(conn,
364 : "SELECT encoding, 'c' AS datlocprovider, "
365 : " datcollate, datctype, NULL AS datlocale "
366 : "FROM pg_catalog.pg_database "
367 : "WHERE datname='template0'");
368 :
369 :
370 34 : if (PQntuples(dbres) != 1)
371 0 : pg_fatal("template0 not found");
372 :
373 34 : locale = pg_malloc(sizeof(DbLocaleInfo));
374 :
375 34 : i_datencoding = PQfnumber(dbres, "encoding");
376 34 : i_datlocprovider = PQfnumber(dbres, "datlocprovider");
377 34 : i_datcollate = PQfnumber(dbres, "datcollate");
378 34 : i_datctype = PQfnumber(dbres, "datctype");
379 34 : i_datlocale = PQfnumber(dbres, "datlocale");
380 :
381 34 : locale->db_encoding = atoi(PQgetvalue(dbres, 0, i_datencoding));
382 34 : locale->db_collprovider = PQgetvalue(dbres, 0, i_datlocprovider)[0];
383 34 : locale->db_collate = pg_strdup(PQgetvalue(dbres, 0, i_datcollate));
384 34 : locale->db_ctype = pg_strdup(PQgetvalue(dbres, 0, i_datctype));
385 34 : if (PQgetisnull(dbres, 0, i_datlocale))
386 28 : locale->db_locale = NULL;
387 : else
388 6 : locale->db_locale = pg_strdup(PQgetvalue(dbres, 0, i_datlocale));
389 :
390 34 : cluster->template0 = locale;
391 :
392 34 : PQclear(dbres);
393 34 : PQfinish(conn);
394 34 : }
395 :
396 :
397 : /*
398 : * get_db_infos()
399 : *
400 : * Scans pg_database system catalog and populates all user
401 : * databases.
402 : */
403 : static void
404 34 : get_db_infos(ClusterInfo *cluster)
405 : {
406 34 : PGconn *conn = connectToServer(cluster, "template1");
407 : PGresult *res;
408 : int ntups;
409 : int tupnum;
410 : DbInfo *dbinfos;
411 : int i_datname,
412 : i_oid,
413 : i_spclocation;
414 : char query[QUERY_ALLOC];
415 :
416 34 : snprintf(query, sizeof(query),
417 : "SELECT d.oid, d.datname, d.encoding, d.datcollate, d.datctype, ");
418 34 : if (GET_MAJOR_VERSION(cluster->major_version) >= 1700)
419 34 : snprintf(query + strlen(query), sizeof(query) - strlen(query),
420 : "datlocprovider, datlocale, ");
421 0 : else if (GET_MAJOR_VERSION(cluster->major_version) >= 1500)
422 0 : snprintf(query + strlen(query), sizeof(query) - strlen(query),
423 : "datlocprovider, daticulocale AS datlocale, ");
424 : else
425 0 : snprintf(query + strlen(query), sizeof(query) - strlen(query),
426 : "'c' AS datlocprovider, NULL AS datlocale, ");
427 34 : snprintf(query + strlen(query), sizeof(query) - strlen(query),
428 : "pg_catalog.pg_tablespace_location(t.oid) AS spclocation "
429 : "FROM pg_catalog.pg_database d "
430 : " LEFT OUTER JOIN pg_catalog.pg_tablespace t "
431 : " ON d.dattablespace = t.oid "
432 : "WHERE d.datallowconn = true "
433 : "ORDER BY 1");
434 :
435 34 : res = executeQueryOrDie(conn, "%s", query);
436 :
437 34 : i_oid = PQfnumber(res, "oid");
438 34 : i_datname = PQfnumber(res, "datname");
439 34 : i_spclocation = PQfnumber(res, "spclocation");
440 :
441 34 : ntups = PQntuples(res);
442 34 : dbinfos = (DbInfo *) pg_malloc0(sizeof(DbInfo) * ntups);
443 :
444 126 : for (tupnum = 0; tupnum < ntups; tupnum++)
445 : {
446 92 : dbinfos[tupnum].db_oid = atooid(PQgetvalue(res, tupnum, i_oid));
447 92 : dbinfos[tupnum].db_name = pg_strdup(PQgetvalue(res, tupnum, i_datname));
448 92 : snprintf(dbinfos[tupnum].db_tablespace, sizeof(dbinfos[tupnum].db_tablespace), "%s",
449 : PQgetvalue(res, tupnum, i_spclocation));
450 : }
451 34 : PQclear(res);
452 :
453 34 : PQfinish(conn);
454 :
455 34 : cluster->dbarr.dbs = dbinfos;
456 34 : cluster->dbarr.ndbs = ntups;
457 34 : }
458 :
459 :
460 : /*
461 : * get_rel_infos_query()
462 : *
463 : * Returns the query for retrieving the relation information for all the user
464 : * tables and indexes in the database, for use by get_db_rel_and_slot_infos()'s
465 : * UpgradeTask.
466 : *
467 : * Note: the result is assumed to be sorted by OID. This allows later
468 : * processing to match up old and new databases efficiently.
469 : */
470 : static char *
471 34 : get_rel_infos_query(void)
472 : {
473 : PQExpBufferData query;
474 :
475 34 : initPQExpBuffer(&query);
476 :
477 : /*
478 : * Create a CTE that collects OIDs of regular user tables and matviews,
479 : * but excluding toast tables and indexes. We assume that relations with
480 : * OIDs >= FirstNormalObjectId belong to the user. (That's probably
481 : * redundant with the namespace-name exclusions, but let's be safe.)
482 : *
483 : * pg_largeobject contains user data that does not appear in pg_dump
484 : * output, so we have to copy that system table. It's easiest to do that
485 : * by treating it as a user table.
486 : */
487 34 : appendPQExpBuffer(&query,
488 : "WITH regular_heap (reloid, indtable, toastheap) AS ( "
489 : " SELECT c.oid, 0::oid, 0::oid "
490 : " FROM pg_catalog.pg_class c JOIN pg_catalog.pg_namespace n "
491 : " ON c.relnamespace = n.oid "
492 : " WHERE relkind IN (" CppAsString2(RELKIND_RELATION) ", "
493 : CppAsString2(RELKIND_MATVIEW) ") AND "
494 : /* exclude possible orphaned temp tables */
495 : " ((n.nspname !~ '^pg_temp_' AND "
496 : " n.nspname !~ '^pg_toast_temp_' AND "
497 : " n.nspname NOT IN ('pg_catalog', 'information_schema', "
498 : " 'binary_upgrade', 'pg_toast') AND "
499 : " c.oid >= %u::pg_catalog.oid) OR "
500 : " (n.nspname = 'pg_catalog' AND "
501 : " relname IN ('pg_largeobject') ))), ",
502 : FirstNormalObjectId);
503 :
504 : /*
505 : * Add a CTE that collects OIDs of toast tables belonging to the tables
506 : * selected by the regular_heap CTE. (We have to do this separately
507 : * because the namespace-name rules above don't work for toast tables.)
508 : */
509 34 : appendPQExpBufferStr(&query,
510 : " toast_heap (reloid, indtable, toastheap) AS ( "
511 : " SELECT c.reltoastrelid, 0::oid, c.oid "
512 : " FROM regular_heap JOIN pg_catalog.pg_class c "
513 : " ON regular_heap.reloid = c.oid "
514 : " WHERE c.reltoastrelid != 0), ");
515 :
516 : /*
517 : * Add a CTE that collects OIDs of all valid indexes on the previously
518 : * selected tables. We can ignore invalid indexes since pg_dump does.
519 : * Testing indisready is necessary in 9.2, and harmless in earlier/later
520 : * versions.
521 : */
522 34 : appendPQExpBufferStr(&query,
523 : " all_index (reloid, indtable, toastheap) AS ( "
524 : " SELECT indexrelid, indrelid, 0::oid "
525 : " FROM pg_catalog.pg_index "
526 : " WHERE indisvalid AND indisready "
527 : " AND indrelid IN "
528 : " (SELECT reloid FROM regular_heap "
529 : " UNION ALL "
530 : " SELECT reloid FROM toast_heap)) ");
531 :
532 : /*
533 : * And now we can write the query that retrieves the data we want for each
534 : * heap and index relation. Make sure result is sorted by OID.
535 : */
536 34 : appendPQExpBufferStr(&query,
537 : "SELECT all_rels.*, n.nspname, c.relname, "
538 : " c.relfilenode, c.reltablespace, "
539 : " pg_catalog.pg_tablespace_location(t.oid) AS spclocation "
540 : "FROM (SELECT * FROM regular_heap "
541 : " UNION ALL "
542 : " SELECT * FROM toast_heap "
543 : " UNION ALL "
544 : " SELECT * FROM all_index) all_rels "
545 : " JOIN pg_catalog.pg_class c "
546 : " ON all_rels.reloid = c.oid "
547 : " JOIN pg_catalog.pg_namespace n "
548 : " ON c.relnamespace = n.oid "
549 : " LEFT OUTER JOIN pg_catalog.pg_tablespace t "
550 : " ON c.reltablespace = t.oid "
551 : "ORDER BY 1");
552 :
553 34 : return query.data;
554 : }
555 :
556 : /*
557 : * Callback function for processing results of the query returned by
558 : * get_rel_infos_query(), which is used for get_db_rel_and_slot_infos()'s
559 : * UpgradeTask. This function stores the relation information for later use.
560 : */
561 : static void
562 92 : process_rel_infos(DbInfo *dbinfo, PGresult *res, void *arg)
563 : {
564 92 : int ntups = PQntuples(res);
565 92 : RelInfo *relinfos = (RelInfo *) pg_malloc(sizeof(RelInfo) * ntups);
566 92 : int i_reloid = PQfnumber(res, "reloid");
567 92 : int i_indtable = PQfnumber(res, "indtable");
568 92 : int i_toastheap = PQfnumber(res, "toastheap");
569 92 : int i_nspname = PQfnumber(res, "nspname");
570 92 : int i_relname = PQfnumber(res, "relname");
571 92 : int i_relfilenumber = PQfnumber(res, "relfilenode");
572 92 : int i_reltablespace = PQfnumber(res, "reltablespace");
573 92 : int i_spclocation = PQfnumber(res, "spclocation");
574 92 : int num_rels = 0;
575 92 : char *nspname = NULL;
576 92 : char *relname = NULL;
577 92 : char *tablespace = NULL;
578 92 : char *last_namespace = NULL;
579 92 : char *last_tablespace = NULL;
580 :
581 : AssertVariableIsOfType(&process_rel_infos, UpgradeTaskProcessCB);
582 :
583 8322 : for (int relnum = 0; relnum < ntups; relnum++)
584 : {
585 8230 : RelInfo *curr = &relinfos[num_rels++];
586 :
587 8230 : curr->reloid = atooid(PQgetvalue(res, relnum, i_reloid));
588 8230 : curr->indtable = atooid(PQgetvalue(res, relnum, i_indtable));
589 8230 : curr->toastheap = atooid(PQgetvalue(res, relnum, i_toastheap));
590 :
591 8230 : nspname = PQgetvalue(res, relnum, i_nspname);
592 8230 : curr->nsp_alloc = false;
593 :
594 : /*
595 : * Many of the namespace and tablespace strings are identical, so we
596 : * try to reuse the allocated string pointers where possible to reduce
597 : * memory consumption.
598 : */
599 : /* Can we reuse the previous string allocation? */
600 8230 : if (last_namespace && strcmp(nspname, last_namespace) == 0)
601 4934 : curr->nspname = last_namespace;
602 : else
603 : {
604 3296 : last_namespace = curr->nspname = pg_strdup(nspname);
605 3296 : curr->nsp_alloc = true;
606 : }
607 :
608 8230 : relname = PQgetvalue(res, relnum, i_relname);
609 8230 : curr->relname = pg_strdup(relname);
610 :
611 8230 : curr->relfilenumber = atooid(PQgetvalue(res, relnum, i_relfilenumber));
612 8230 : curr->tblsp_alloc = false;
613 :
614 : /* Is the tablespace oid non-default? */
615 8230 : if (atooid(PQgetvalue(res, relnum, i_reltablespace)) != 0)
616 : {
617 : /*
618 : * The tablespace location might be "", meaning the cluster
619 : * default location, i.e. pg_default or pg_global.
620 : */
621 0 : tablespace = PQgetvalue(res, relnum, i_spclocation);
622 :
623 : /* Can we reuse the previous string allocation? */
624 0 : if (last_tablespace && strcmp(tablespace, last_tablespace) == 0)
625 0 : curr->tablespace = last_tablespace;
626 : else
627 : {
628 0 : last_tablespace = curr->tablespace = pg_strdup(tablespace);
629 0 : curr->tblsp_alloc = true;
630 : }
631 : }
632 : else
633 : /* A zero reltablespace oid indicates the database tablespace. */
634 8230 : curr->tablespace = dbinfo->db_tablespace;
635 : }
636 :
637 92 : dbinfo->rel_arr.rels = relinfos;
638 92 : dbinfo->rel_arr.nrels = num_rels;
639 92 : }
640 :
641 : /*
642 : * get_old_cluster_logical_slot_infos_query()
643 : *
644 : * Returns the query for retrieving the logical slot information for all the
645 : * logical replication slots in the database, for use by
646 : * get_db_rel_and_slot_infos()'s UpgradeTask. The status of each logical slot
647 : * is checked in check_old_cluster_for_valid_slots().
648 : */
649 : static char *
650 16 : get_old_cluster_logical_slot_infos_query(void)
651 : {
652 : /*
653 : * Fetch the logical replication slot information. The check whether the
654 : * slot is considered caught up is done by an upgrade function. This
655 : * regards the slot as caught up if we don't find any decodable changes.
656 : * See binary_upgrade_logical_slot_has_caught_up().
657 : *
658 : * Note that we can't ensure whether the slot is caught up during
659 : * live_check as the new WAL records could be generated.
660 : *
661 : * We intentionally skip checking the WALs for invalidated slots as the
662 : * corresponding WALs could have been removed for such slots.
663 : *
664 : * The temporary slots are explicitly ignored while checking because such
665 : * slots cannot exist after the upgrade. During the upgrade, clusters are
666 : * started and stopped several times causing any temporary slots to be
667 : * removed.
668 : */
669 16 : return psprintf("SELECT slot_name, plugin, two_phase, failover, "
670 : "%s as caught_up, invalidation_reason IS NOT NULL as invalid "
671 : "FROM pg_catalog.pg_replication_slots "
672 : "WHERE slot_type = 'logical' AND "
673 : "database = current_database() AND "
674 : "temporary IS FALSE;",
675 16 : user_opts.live_check ? "FALSE" :
676 : "(CASE WHEN invalidation_reason IS NOT NULL THEN FALSE "
677 : "ELSE (SELECT pg_catalog.binary_upgrade_logical_slot_has_caught_up(slot_name)) "
678 : "END)");
679 : }
680 :
681 : /*
682 : * Callback function for processing results of the query returned by
683 : * get_old_cluster_logical_slot_infos_query(), which is used for
684 : * get_db_rel_and_slot_infos()'s UpgradeTask. This function stores the logical
685 : * slot information for later use.
686 : */
687 : static void
688 48 : process_old_cluster_logical_slot_infos(DbInfo *dbinfo, PGresult *res, void *arg)
689 : {
690 48 : LogicalSlotInfo *slotinfos = NULL;
691 48 : int num_slots = PQntuples(res);
692 :
693 : AssertVariableIsOfType(&process_old_cluster_logical_slot_infos,
694 : UpgradeTaskProcessCB);
695 :
696 48 : if (num_slots)
697 : {
698 : int i_slotname;
699 : int i_plugin;
700 : int i_twophase;
701 : int i_failover;
702 : int i_caught_up;
703 : int i_invalid;
704 :
705 6 : slotinfos = (LogicalSlotInfo *) pg_malloc(sizeof(LogicalSlotInfo) * num_slots);
706 :
707 6 : i_slotname = PQfnumber(res, "slot_name");
708 6 : i_plugin = PQfnumber(res, "plugin");
709 6 : i_twophase = PQfnumber(res, "two_phase");
710 6 : i_failover = PQfnumber(res, "failover");
711 6 : i_caught_up = PQfnumber(res, "caught_up");
712 6 : i_invalid = PQfnumber(res, "invalid");
713 :
714 16 : for (int slotnum = 0; slotnum < num_slots; slotnum++)
715 : {
716 10 : LogicalSlotInfo *curr = &slotinfos[slotnum];
717 :
718 10 : curr->slotname = pg_strdup(PQgetvalue(res, slotnum, i_slotname));
719 10 : curr->plugin = pg_strdup(PQgetvalue(res, slotnum, i_plugin));
720 10 : curr->two_phase = (strcmp(PQgetvalue(res, slotnum, i_twophase), "t") == 0);
721 10 : curr->failover = (strcmp(PQgetvalue(res, slotnum, i_failover), "t") == 0);
722 10 : curr->caught_up = (strcmp(PQgetvalue(res, slotnum, i_caught_up), "t") == 0);
723 10 : curr->invalid = (strcmp(PQgetvalue(res, slotnum, i_invalid), "t") == 0);
724 : }
725 : }
726 :
727 48 : dbinfo->slot_arr.slots = slotinfos;
728 48 : dbinfo->slot_arr.nslots = num_slots;
729 48 : }
730 :
731 :
732 : /*
733 : * count_old_cluster_logical_slots()
734 : *
735 : * Returns the number of logical replication slots for all databases.
736 : *
737 : * Note: this function always returns 0 if the old_cluster is PG16 and prior
738 : * because we gather slot information only for cluster versions greater than or
739 : * equal to PG17. See get_old_cluster_logical_slot_infos().
740 : */
741 : int
742 34 : count_old_cluster_logical_slots(void)
743 : {
744 34 : int slot_count = 0;
745 :
746 142 : for (int dbnum = 0; dbnum < old_cluster.dbarr.ndbs; dbnum++)
747 108 : slot_count += old_cluster.dbarr.dbs[dbnum].slot_arr.nslots;
748 :
749 34 : return slot_count;
750 : }
751 :
752 : /*
753 : * get_subscription_count()
754 : *
755 : * Gets the number of subscriptions in the cluster.
756 : */
757 : void
758 14 : get_subscription_count(ClusterInfo *cluster)
759 : {
760 : PGconn *conn;
761 : PGresult *res;
762 :
763 14 : conn = connectToServer(cluster, "template1");
764 14 : res = executeQueryOrDie(conn, "SELECT count(*) "
765 : "FROM pg_catalog.pg_subscription");
766 14 : cluster->nsubs = atoi(PQgetvalue(res, 0, 0));
767 :
768 14 : PQclear(res);
769 14 : PQfinish(conn);
770 14 : }
771 :
772 : static void
773 6 : free_db_and_rel_infos(DbInfoArr *db_arr)
774 : {
775 : int dbnum;
776 :
777 18 : for (dbnum = 0; dbnum < db_arr->ndbs; dbnum++)
778 : {
779 12 : free_rel_infos(&db_arr->dbs[dbnum].rel_arr);
780 12 : pg_free(db_arr->dbs[dbnum].db_name);
781 : }
782 6 : pg_free(db_arr->dbs);
783 6 : db_arr->dbs = NULL;
784 6 : db_arr->ndbs = 0;
785 6 : }
786 :
787 :
788 : static void
789 12 : free_rel_infos(RelInfoArr *rel_arr)
790 : {
791 : int relnum;
792 :
793 36 : for (relnum = 0; relnum < rel_arr->nrels; relnum++)
794 : {
795 24 : if (rel_arr->rels[relnum].nsp_alloc)
796 12 : pg_free(rel_arr->rels[relnum].nspname);
797 24 : pg_free(rel_arr->rels[relnum].relname);
798 24 : if (rel_arr->rels[relnum].tblsp_alloc)
799 0 : pg_free(rel_arr->rels[relnum].tablespace);
800 : }
801 12 : pg_free(rel_arr->rels);
802 12 : rel_arr->nrels = 0;
803 12 : }
804 :
805 :
806 : static void
807 0 : print_db_infos(DbInfoArr *db_arr)
808 : {
809 : int dbnum;
810 :
811 0 : for (dbnum = 0; dbnum < db_arr->ndbs; dbnum++)
812 : {
813 0 : DbInfo *pDbInfo = &db_arr->dbs[dbnum];
814 :
815 0 : pg_log(PG_VERBOSE, "Database: \"%s\"", pDbInfo->db_name);
816 0 : print_rel_infos(&pDbInfo->rel_arr);
817 0 : print_slot_infos(&pDbInfo->slot_arr);
818 : }
819 0 : }
820 :
821 :
822 : static void
823 0 : print_rel_infos(RelInfoArr *rel_arr)
824 : {
825 : int relnum;
826 :
827 0 : for (relnum = 0; relnum < rel_arr->nrels; relnum++)
828 0 : pg_log(PG_VERBOSE, "relname: \"%s.%s\", reloid: %u, reltblspace: \"%s\"",
829 0 : rel_arr->rels[relnum].nspname,
830 0 : rel_arr->rels[relnum].relname,
831 0 : rel_arr->rels[relnum].reloid,
832 0 : rel_arr->rels[relnum].tablespace);
833 0 : }
834 :
835 : static void
836 0 : print_slot_infos(LogicalSlotInfoArr *slot_arr)
837 : {
838 : /* Quick return if there are no logical slots. */
839 0 : if (slot_arr->nslots == 0)
840 0 : return;
841 :
842 0 : pg_log(PG_VERBOSE, "Logical replication slots in the database:");
843 :
844 0 : for (int slotnum = 0; slotnum < slot_arr->nslots; slotnum++)
845 : {
846 0 : LogicalSlotInfo *slot_info = &slot_arr->slots[slotnum];
847 :
848 0 : pg_log(PG_VERBOSE, "slot name: \"%s\", output plugin: \"%s\", two_phase: %s",
849 : slot_info->slotname,
850 : slot_info->plugin,
851 0 : slot_info->two_phase ? "true" : "false");
852 : }
853 : }
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