1/*-------------------------------------------------------------------------
2 *
3 * collationcmds.c
4 * collation-related commands support code
5 *
6 * Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
7 * Portions Copyright (c) 1994, Regents of the University of California
8 *
9 *
10 * IDENTIFICATION
11 * src/backend/commands/collationcmds.c
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/dependency.h"
21#include "catalog/indexing.h"
22#include "catalog/namespace.h"
23#include "catalog/objectaccess.h"
24#include "catalog/pg_collation.h"
25#include "commands/alter.h"
26#include "commands/collationcmds.h"
27#include "commands/comment.h"
28#include "commands/dbcommands.h"
29#include "commands/defrem.h"
30#include "mb/pg_wchar.h"
31#include "miscadmin.h"
32#include "utils/builtins.h"
33#include "utils/lsyscache.h"
34#include "utils/pg_locale.h"
35#include "utils/rel.h"
36#include "utils/syscache.h"
37
38
39typedef struct
40{
41 char *localename; /* name of locale, as per "locale -a" */
42 char *alias; /* shortened alias for same */
43 int enc; /* encoding */
44} CollAliasData;
45
46
47/*
48 * CREATE COLLATION
49 */
50ObjectAddress
51DefineCollation(ParseState *pstate, List *names, List *parameters, bool if_not_exists)
52{
53 char *collName;
54 Oid collNamespace;
55 AclResult aclresult;
56 ListCell *pl;
57 DefElem *fromEl = NULL;
58 DefElem *localeEl = NULL;
59 DefElem *lccollateEl = NULL;
60 DefElem *lcctypeEl = NULL;
61 DefElem *providerEl = NULL;
62 DefElem *deterministicEl = NULL;
63 DefElem *versionEl = NULL;
64 char *collcollate = NULL;
65 char *collctype = NULL;
66 char *collproviderstr = NULL;
67 bool collisdeterministic = true;
68 int collencoding = 0;
69 char collprovider = 0;
70 char *collversion = NULL;
71 Oid newoid;
72 ObjectAddress address;
73
74 collNamespace = QualifiedNameGetCreationNamespace(names, &collName);
75
76 aclresult = pg_namespace_aclcheck(collNamespace, GetUserId(), ACL_CREATE);
77 if (aclresult != ACLCHECK_OK)
78 aclcheck_error(aclresult, OBJECT_SCHEMA,
79 get_namespace_name(collNamespace));
80
81 foreach(pl, parameters)
82 {
83 DefElem *defel = lfirst_node(DefElem, pl);
84 DefElem **defelp;
85
86 if (strcmp(defel->defname, "from") == 0)
87 defelp = &fromEl;
88 else if (strcmp(defel->defname, "locale") == 0)
89 defelp = &localeEl;
90 else if (strcmp(defel->defname, "lc_collate") == 0)
91 defelp = &lccollateEl;
92 else if (strcmp(defel->defname, "lc_ctype") == 0)
93 defelp = &lcctypeEl;
94 else if (strcmp(defel->defname, "provider") == 0)
95 defelp = &providerEl;
96 else if (strcmp(defel->defname, "deterministic") == 0)
97 defelp = &deterministicEl;
98 else if (strcmp(defel->defname, "version") == 0)
99 defelp = &versionEl;
100 else
101 {
102 ereport(ERROR,
103 (errcode(ERRCODE_SYNTAX_ERROR),
104 errmsg("collation attribute \"%s\" not recognized",
105 defel->defname),
106 parser_errposition(pstate, defel->location)));
107 break;
108 }
109
110 *defelp = defel;
111 }
112
113 if ((localeEl && (lccollateEl || lcctypeEl))
114 || (fromEl && list_length(parameters) != 1))
115 ereport(ERROR,
116 (errcode(ERRCODE_SYNTAX_ERROR),
117 errmsg("conflicting or redundant options")));
118
119 if (fromEl)
120 {
121 Oid collid;
122 HeapTuple tp;
123
124 collid = get_collation_oid(defGetQualifiedName(fromEl), false);
125 tp = SearchSysCache1(COLLOID, ObjectIdGetDatum(collid));
126 if (!HeapTupleIsValid(tp))
127 elog(ERROR, "cache lookup failed for collation %u", collid);
128
129 collcollate = pstrdup(NameStr(((Form_pg_collation) GETSTRUCT(tp))->collcollate));
130 collctype = pstrdup(NameStr(((Form_pg_collation) GETSTRUCT(tp))->collctype));
131 collprovider = ((Form_pg_collation) GETSTRUCT(tp))->collprovider;
132 collisdeterministic = ((Form_pg_collation) GETSTRUCT(tp))->collisdeterministic;
133 collencoding = ((Form_pg_collation) GETSTRUCT(tp))->collencoding;
134
135 ReleaseSysCache(tp);
136
137 /*
138 * Copying the "default" collation is not allowed because most code
139 * checks for DEFAULT_COLLATION_OID instead of COLLPROVIDER_DEFAULT,
140 * and so having a second collation with COLLPROVIDER_DEFAULT would
141 * not work and potentially confuse or crash some code. This could be
142 * fixed with some legwork.
143 */
144 if (collprovider == COLLPROVIDER_DEFAULT)
145 ereport(ERROR,
146 (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
147 errmsg("collation \"default\" cannot be copied")));
148 }
149
150 if (localeEl)
151 {
152 collcollate = defGetString(localeEl);
153 collctype = defGetString(localeEl);
154 }
155
156 if (lccollateEl)
157 collcollate = defGetString(lccollateEl);
158
159 if (lcctypeEl)
160 collctype = defGetString(lcctypeEl);
161
162 if (providerEl)
163 collproviderstr = defGetString(providerEl);
164
165 if (deterministicEl)
166 collisdeterministic = defGetBoolean(deterministicEl);
167
168 if (versionEl)
169 collversion = defGetString(versionEl);
170
171 if (collproviderstr)
172 {
173 if (pg_strcasecmp(collproviderstr, "icu") == 0)
174 collprovider = COLLPROVIDER_ICU;
175 else if (pg_strcasecmp(collproviderstr, "libc") == 0)
176 collprovider = COLLPROVIDER_LIBC;
177 else
178 ereport(ERROR,
179 (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
180 errmsg("unrecognized collation provider: %s",
181 collproviderstr)));
182 }
183 else if (!fromEl)
184 collprovider = COLLPROVIDER_LIBC;
185
186 if (!collcollate)
187 ereport(ERROR,
188 (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
189 errmsg("parameter \"lc_collate\" must be specified")));
190
191 if (!collctype)
192 ereport(ERROR,
193 (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
194 errmsg("parameter \"lc_ctype\" must be specified")));
195
196 /*
197 * Nondeterministic collations are currently only supported with ICU
198 * because that's the only case where it can actually make a difference.
199 * So we can save writing the code for the other providers.
200 */
201 if (!collisdeterministic && collprovider != COLLPROVIDER_ICU)
202 ereport(ERROR,
203 (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
204 errmsg("nondeterministic collations not supported with this provider")));
205
206 if (!fromEl)
207 {
208 if (collprovider == COLLPROVIDER_ICU)
209 collencoding = -1;
210 else
211 {
212 collencoding = GetDatabaseEncoding();
213 check_encoding_locale_matches(collencoding, collcollate, collctype);
214 }
215 }
216
217 if (!collversion)
218 collversion = get_collation_actual_version(collprovider, collcollate);
219
220 newoid = CollationCreate(collName,
221 collNamespace,
222 GetUserId(),
223 collprovider,
224 collisdeterministic,
225 collencoding,
226 collcollate,
227 collctype,
228 collversion,
229 if_not_exists,
230 false); /* not quiet */
231
232 if (!OidIsValid(newoid))
233 return InvalidObjectAddress;
234
235 /*
236 * Check that the locales can be loaded. NB: pg_newlocale_from_collation
237 * is only supposed to be called on non-C-equivalent locales.
238 */
239 CommandCounterIncrement();
240 if (!lc_collate_is_c(newoid) || !lc_ctype_is_c(newoid))
241 (void) pg_newlocale_from_collation(newoid);
242
243 ObjectAddressSet(address, CollationRelationId, newoid);
244
245 return address;
246}
247
248/*
249 * Subroutine for ALTER COLLATION SET SCHEMA and RENAME
250 *
251 * Is there a collation with the same name of the given collation already in
252 * the given namespace? If so, raise an appropriate error message.
253 */
254void
255IsThereCollationInNamespace(const char *collname, Oid nspOid)
256{
257 /* make sure the name doesn't already exist in new schema */
258 if (SearchSysCacheExists3(COLLNAMEENCNSP,
259 CStringGetDatum(collname),
260 Int32GetDatum(GetDatabaseEncoding()),
261 ObjectIdGetDatum(nspOid)))
262 ereport(ERROR,
263 (errcode(ERRCODE_DUPLICATE_OBJECT),
264 errmsg("collation \"%s\" for encoding \"%s\" already exists in schema \"%s\"",
265 collname, GetDatabaseEncodingName(),
266 get_namespace_name(nspOid))));
267
268 /* mustn't match an any-encoding entry, either */
269 if (SearchSysCacheExists3(COLLNAMEENCNSP,
270 CStringGetDatum(collname),
271 Int32GetDatum(-1),
272 ObjectIdGetDatum(nspOid)))
273 ereport(ERROR,
274 (errcode(ERRCODE_DUPLICATE_OBJECT),
275 errmsg("collation \"%s\" already exists in schema \"%s\"",
276 collname, get_namespace_name(nspOid))));
277}
278
279/*
280 * ALTER COLLATION
281 */
282ObjectAddress
283AlterCollation(AlterCollationStmt *stmt)
284{
285 Relation rel;
286 Oid collOid;
287 HeapTuple tup;
288 Form_pg_collation collForm;
289 Datum collversion;
290 bool isnull;
291 char *oldversion;
292 char *newversion;
293 ObjectAddress address;
294
295 rel = table_open(CollationRelationId, RowExclusiveLock);
296 collOid = get_collation_oid(stmt->collname, false);
297
298 if (!pg_collation_ownercheck(collOid, GetUserId()))
299 aclcheck_error(ACLCHECK_NOT_OWNER, OBJECT_COLLATION,
300 NameListToString(stmt->collname));
301
302 tup = SearchSysCacheCopy1(COLLOID, ObjectIdGetDatum(collOid));
303 if (!HeapTupleIsValid(tup))
304 elog(ERROR, "cache lookup failed for collation %u", collOid);
305
306 collForm = (Form_pg_collation) GETSTRUCT(tup);
307 collversion = SysCacheGetAttr(COLLOID, tup, Anum_pg_collation_collversion,
308 &isnull);
309 oldversion = isnull ? NULL : TextDatumGetCString(collversion);
310
311 newversion = get_collation_actual_version(collForm->collprovider, NameStr(collForm->collcollate));
312
313 /* cannot change from NULL to non-NULL or vice versa */
314 if ((!oldversion && newversion) || (oldversion && !newversion))
315 elog(ERROR, "invalid collation version change");
316 else if (oldversion && newversion && strcmp(newversion, oldversion) != 0)
317 {
318 bool nulls[Natts_pg_collation];
319 bool replaces[Natts_pg_collation];
320 Datum values[Natts_pg_collation];
321
322 ereport(NOTICE,
323 (errmsg("changing version from %s to %s",
324 oldversion, newversion)));
325
326 memset(values, 0, sizeof(values));
327 memset(nulls, false, sizeof(nulls));
328 memset(replaces, false, sizeof(replaces));
329
330 values[Anum_pg_collation_collversion - 1] = CStringGetTextDatum(newversion);
331 replaces[Anum_pg_collation_collversion - 1] = true;
332
333 tup = heap_modify_tuple(tup, RelationGetDescr(rel),
334 values, nulls, replaces);
335 }
336 else
337 ereport(NOTICE,
338 (errmsg("version has not changed")));
339
340 CatalogTupleUpdate(rel, &tup->t_self, tup);
341
342 InvokeObjectPostAlterHook(CollationRelationId, collOid, 0);
343
344 ObjectAddressSet(address, CollationRelationId, collOid);
345
346 heap_freetuple(tup);
347 table_close(rel, NoLock);
348
349 return address;
350}
351
352
353Datum
354pg_collation_actual_version(PG_FUNCTION_ARGS)
355{
356 Oid collid = PG_GETARG_OID(0);
357 HeapTuple tp;
358 char *collcollate;
359 char collprovider;
360 char *version;
361
362 tp = SearchSysCache1(COLLOID, ObjectIdGetDatum(collid));
363 if (!HeapTupleIsValid(tp))
364 ereport(ERROR,
365 (errcode(ERRCODE_UNDEFINED_OBJECT),
366 errmsg("collation with OID %u does not exist", collid)));
367
368 collcollate = pstrdup(NameStr(((Form_pg_collation) GETSTRUCT(tp))->collcollate));
369 collprovider = ((Form_pg_collation) GETSTRUCT(tp))->collprovider;
370
371 ReleaseSysCache(tp);
372
373 version = get_collation_actual_version(collprovider, collcollate);
374
375 if (version)
376 PG_RETURN_TEXT_P(cstring_to_text(version));
377 else
378 PG_RETURN_NULL();
379}
380
381
382/* will we use "locale -a" in pg_import_system_collations? */
383#if defined(HAVE_LOCALE_T) && !defined(WIN32)
384#define READ_LOCALE_A_OUTPUT
385#endif
386
387#if defined(READ_LOCALE_A_OUTPUT) || defined(USE_ICU)
388/*
389 * Check a string to see if it is pure ASCII
390 */
391static bool
392is_all_ascii(const char *str)
393{
394 while (*str)
395 {
396 if (IS_HIGHBIT_SET(*str))
397 return false;
398 str++;
399 }
400 return true;
401}
402#endif /* READ_LOCALE_A_OUTPUT || USE_ICU */
403
404#ifdef READ_LOCALE_A_OUTPUT
405/*
406 * "Normalize" a libc locale name, stripping off encoding tags such as
407 * ".utf8" (e.g., "en_US.utf8" -> "en_US", but "br_FR.iso885915@euro"
408 * -> "br_FR@euro"). Return true if a new, different name was
409 * generated.
410 */
411static bool
412normalize_libc_locale_name(char *new, const char *old)
413{
414 char *n = new;
415 const char *o = old;
416 bool changed = false;
417
418 while (*o)
419 {
420 if (*o == '.')
421 {
422 /* skip over encoding tag such as ".utf8" or ".UTF-8" */
423 o++;
424 while ((*o >= 'A' && *o <= 'Z')
425 || (*o >= 'a' && *o <= 'z')
426 || (*o >= '0' && *o <= '9')
427 || (*o == '-'))
428 o++;
429 changed = true;
430 }
431 else
432 *n++ = *o++;
433 }
434 *n = '\0';
435
436 return changed;
437}
438
439/*
440 * qsort comparator for CollAliasData items
441 */
442static int
443cmpaliases(const void *a, const void *b)
444{
445 const CollAliasData *ca = (const CollAliasData *) a;
446 const CollAliasData *cb = (const CollAliasData *) b;
447
448 /* comparing localename is enough because other fields are derived */
449 return strcmp(ca->localename, cb->localename);
450}
451#endif /* READ_LOCALE_A_OUTPUT */
452
453
454#ifdef USE_ICU
455/*
456 * Get the ICU language tag for a locale name.
457 * The result is a palloc'd string.
458 */
459static char *
460get_icu_language_tag(const char *localename)
461{
462 char buf[ULOC_FULLNAME_CAPACITY];
463 UErrorCode status;
464
465 status = U_ZERO_ERROR;
466 uloc_toLanguageTag(localename, buf, sizeof(buf), TRUE, &status);
467 if (U_FAILURE(status))
468 ereport(ERROR,
469 (errmsg("could not convert locale name \"%s\" to language tag: %s",
470 localename, u_errorName(status))));
471
472 return pstrdup(buf);
473}
474
475/*
476 * Get a comment (specifically, the display name) for an ICU locale.
477 * The result is a palloc'd string, or NULL if we can't get a comment
478 * or find that it's not all ASCII. (We can *not* accept non-ASCII
479 * comments, because the contents of template0 must be encoding-agnostic.)
480 */
481static char *
482get_icu_locale_comment(const char *localename)
483{
484 UErrorCode status;
485 UChar displayname[128];
486 int32 len_uchar;
487 int32 i;
488 char *result;
489
490 status = U_ZERO_ERROR;
491 len_uchar = uloc_getDisplayName(localename, "en",
492 displayname, lengthof(displayname),
493 &status);
494 if (U_FAILURE(status))
495 return NULL; /* no good reason to raise an error */
496
497 /* Check for non-ASCII comment (can't use is_all_ascii for this) */
498 for (i = 0; i < len_uchar; i++)
499 {
500 if (displayname[i] > 127)
501 return NULL;
502 }
503
504 /* OK, transcribe */
505 result = palloc(len_uchar + 1);
506 for (i = 0; i < len_uchar; i++)
507 result[i] = displayname[i];
508 result[len_uchar] = '\0';
509
510 return result;
511}
512#endif /* USE_ICU */
513
514
515/*
516 * pg_import_system_collations: add known system collations to pg_collation
517 */
518Datum
519pg_import_system_collations(PG_FUNCTION_ARGS)
520{
521 Oid nspid = PG_GETARG_OID(0);
522 int ncreated = 0;
523
524 /* silence compiler warning if we have no locale implementation at all */
525 (void) nspid;
526
527 if (!superuser())
528 ereport(ERROR,
529 (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
530 (errmsg("must be superuser to import system collations"))));
531
532 /* Load collations known to libc, using "locale -a" to enumerate them */
533#ifdef READ_LOCALE_A_OUTPUT
534 {
535 FILE *locale_a_handle;
536 char localebuf[NAMEDATALEN]; /* we assume ASCII so this is fine */
537 int nvalid = 0;
538 Oid collid;
539 CollAliasData *aliases;
540 int naliases,
541 maxaliases,
542 i;
543
544 /* expansible array of aliases */
545 maxaliases = 100;
546 aliases = (CollAliasData *) palloc(maxaliases * sizeof(CollAliasData));
547 naliases = 0;
548
549 locale_a_handle = OpenPipeStream("locale -a", "r");
550 if (locale_a_handle == NULL)
551 ereport(ERROR,
552 (errcode_for_file_access(),
553 errmsg("could not execute command \"%s\": %m",
554 "locale -a")));
555
556 while (fgets(localebuf, sizeof(localebuf), locale_a_handle))
557 {
558 size_t len;
559 int enc;
560 char alias[NAMEDATALEN];
561
562 len = strlen(localebuf);
563
564 if (len == 0 || localebuf[len - 1] != '\n')
565 {
566 elog(DEBUG1, "locale name too long, skipped: \"%s\"", localebuf);
567 continue;
568 }
569 localebuf[len - 1] = '\0';
570
571 /*
572 * Some systems have locale names that don't consist entirely of
573 * ASCII letters (such as "bokm&aring;l" or "fran&ccedil;ais").
574 * This is pretty silly, since we need the locale itself to
575 * interpret the non-ASCII characters. We can't do much with
576 * those, so we filter them out.
577 */
578 if (!is_all_ascii(localebuf))
579 {
580 elog(DEBUG1, "locale name has non-ASCII characters, skipped: \"%s\"", localebuf);
581 continue;
582 }
583
584 enc = pg_get_encoding_from_locale(localebuf, false);
585 if (enc < 0)
586 {
587 /* error message printed by pg_get_encoding_from_locale() */
588 continue;
589 }
590 if (!PG_VALID_BE_ENCODING(enc))
591 continue; /* ignore locales for client-only encodings */
592 if (enc == PG_SQL_ASCII)
593 continue; /* C/POSIX are already in the catalog */
594
595 /* count valid locales found in operating system */
596 nvalid++;
597
598 /*
599 * Create a collation named the same as the locale, but quietly
600 * doing nothing if it already exists. This is the behavior we
601 * need even at initdb time, because some versions of "locale -a"
602 * can report the same locale name more than once. And it's
603 * convenient for later import runs, too, since you just about
604 * always want to add on new locales without a lot of chatter
605 * about existing ones.
606 */
607 collid = CollationCreate(localebuf, nspid, GetUserId(),
608 COLLPROVIDER_LIBC, true, enc,
609 localebuf, localebuf,
610 get_collation_actual_version(COLLPROVIDER_LIBC, localebuf),
611 true, true);
612 if (OidIsValid(collid))
613 {
614 ncreated++;
615
616 /* Must do CCI between inserts to handle duplicates correctly */
617 CommandCounterIncrement();
618 }
619
620 /*
621 * Generate aliases such as "en_US" in addition to "en_US.utf8"
622 * for ease of use. Note that collation names are unique per
623 * encoding only, so this doesn't clash with "en_US" for LATIN1,
624 * say.
625 *
626 * However, it might conflict with a name we'll see later in the
627 * "locale -a" output. So save up the aliases and try to add them
628 * after we've read all the output.
629 */
630 if (normalize_libc_locale_name(alias, localebuf))
631 {
632 if (naliases >= maxaliases)
633 {
634 maxaliases *= 2;
635 aliases = (CollAliasData *)
636 repalloc(aliases, maxaliases * sizeof(CollAliasData));
637 }
638 aliases[naliases].localename = pstrdup(localebuf);
639 aliases[naliases].alias = pstrdup(alias);
640 aliases[naliases].enc = enc;
641 naliases++;
642 }
643 }
644
645 ClosePipeStream(locale_a_handle);
646
647 /*
648 * Before processing the aliases, sort them by locale name. The point
649 * here is that if "locale -a" gives us multiple locale names with the
650 * same encoding and base name, say "en_US.utf8" and "en_US.utf-8", we
651 * want to pick a deterministic one of them. First in ASCII sort
652 * order is a good enough rule. (Before PG 10, the code corresponding
653 * to this logic in initdb.c had an additional ordering rule, to
654 * prefer the locale name exactly matching the alias, if any. We
655 * don't need to consider that here, because we would have already
656 * created such a pg_collation entry above, and that one will win.)
657 */
658 if (naliases > 1)
659 qsort((void *) aliases, naliases, sizeof(CollAliasData), cmpaliases);
660
661 /* Now add aliases, ignoring any that match pre-existing entries */
662 for (i = 0; i < naliases; i++)
663 {
664 char *locale = aliases[i].localename;
665 char *alias = aliases[i].alias;
666 int enc = aliases[i].enc;
667
668 collid = CollationCreate(alias, nspid, GetUserId(),
669 COLLPROVIDER_LIBC, true, enc,
670 locale, locale,
671 get_collation_actual_version(COLLPROVIDER_LIBC, locale),
672 true, true);
673 if (OidIsValid(collid))
674 {
675 ncreated++;
676
677 CommandCounterIncrement();
678 }
679 }
680
681 /* Give a warning if "locale -a" seems to be malfunctioning */
682 if (nvalid == 0)
683 ereport(WARNING,
684 (errmsg("no usable system locales were found")));
685 }
686#endif /* READ_LOCALE_A_OUTPUT */
687
688 /*
689 * Load collations known to ICU
690 *
691 * We use uloc_countAvailable()/uloc_getAvailable() rather than
692 * ucol_countAvailable()/ucol_getAvailable(). The former returns a full
693 * set of language+region combinations, whereas the latter only returns
694 * language+region combinations of they are distinct from the language's
695 * base collation. So there might not be a de-DE or en-GB, which would be
696 * confusing.
697 */
698#ifdef USE_ICU
699 {
700 int i;
701
702 /*
703 * Start the loop at -1 to sneak in the root locale without too much
704 * code duplication.
705 */
706 for (i = -1; i < uloc_countAvailable(); i++)
707 {
708 const char *name;
709 char *langtag;
710 char *icucomment;
711 const char *collcollate;
712 Oid collid;
713
714 if (i == -1)
715 name = ""; /* ICU root locale */
716 else
717 name = uloc_getAvailable(i);
718
719 langtag = get_icu_language_tag(name);
720 collcollate = U_ICU_VERSION_MAJOR_NUM >= 54 ? langtag : name;
721
722 /*
723 * Be paranoid about not allowing any non-ASCII strings into
724 * pg_collation
725 */
726 if (!is_all_ascii(langtag) || !is_all_ascii(collcollate))
727 continue;
728
729 collid = CollationCreate(psprintf("%s-x-icu", langtag),
730 nspid, GetUserId(),
731 COLLPROVIDER_ICU, true, -1,
732 collcollate, collcollate,
733 get_collation_actual_version(COLLPROVIDER_ICU, collcollate),
734 true, true);
735 if (OidIsValid(collid))
736 {
737 ncreated++;
738
739 CommandCounterIncrement();
740
741 icucomment = get_icu_locale_comment(name);
742 if (icucomment)
743 CreateComments(collid, CollationRelationId, 0,
744 icucomment);
745 }
746 }
747 }
748#endif /* USE_ICU */
749
750 PG_RETURN_INT32(ncreated);
751}
752