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Create an explicit concept of collations that work for any encoding.
Use collencoding = -1 to represent such a collation in pg_collation. We need this to make the "default" entry work sanely, and a later patch will fix the C/POSIX entries to be represented this way instead of duplicating them across all encodings. All lookup operations now search first for an entry that's database-encoding-specific, and then for the same name with collencoding = -1. Also some incidental code cleanup in collationcmds.c and pg_collation.c.
This commit is contained in:
Tom Lane
@ -448,7 +448,7 @@ CREATE VIEW collations AS
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CAST('NO PAD' AS character_data) AS pad_attribute
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FROM pg_collation c, pg_namespace nc
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WHERE c.collnamespace = nc.oid
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AND collencoding = (SELECT encoding FROM pg_catalog.pg_database WHERE datname = pg_catalog.current_database());
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AND collencoding IN (-1, (SELECT encoding FROM pg_database WHERE datname = current_database()));
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GRANT SELECT ON collations TO PUBLIC;
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@ -467,7 +467,7 @@ CREATE VIEW collation_character_set_applicability AS
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CAST(getdatabaseencoding() AS sql_identifier) AS character_set_name
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FROM pg_collation c, pg_namespace nc
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WHERE c.collnamespace = nc.oid
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AND collencoding = (SELECT encoding FROM pg_catalog.pg_database WHERE datname = pg_catalog.current_database());
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AND collencoding IN (-1, (SELECT encoding FROM pg_database WHERE datname = current_database()));
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GRANT SELECT ON collation_character_set_applicability TO PUBLIC;
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@ -2036,7 +2036,7 @@ CREATE VIEW usage_privileges AS
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WHERE u.oid = c.collowner
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AND c.collnamespace = n.oid
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AND c.collencoding = (SELECT encoding FROM pg_catalog.pg_database WHERE datname = pg_catalog.current_database())
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AND collencoding IN (-1, (SELECT encoding FROM pg_database WHERE datname = current_database()))
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UNION ALL
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@ -1617,13 +1617,11 @@ OpfamilyIsVisible(Oid opfid)
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* CollationGetCollid
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* Try to resolve an unqualified collation name.
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* Returns OID if collation found in search path, else InvalidOid.
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*
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* This is essentially the same as RelnameGetRelid.
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*/
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Oid
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CollationGetCollid(const char *collname)
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{
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Oid collid;
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int32 dbencoding = GetDatabaseEncoding();
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ListCell *l;
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recomputeNamespacePath();
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@ -1631,13 +1629,23 @@ CollationGetCollid(const char *collname)
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foreach(l, activeSearchPath)
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{
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Oid namespaceId = lfirst_oid(l);
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Oid collid;
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if (namespaceId == myTempNamespace)
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continue; /* do not look in temp namespace */
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/* Check for database-encoding-specific entry */
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collid = GetSysCacheOid3(COLLNAMEENCNSP,
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PointerGetDatum(collname),
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Int32GetDatum(GetDatabaseEncoding()),
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Int32GetDatum(dbencoding),
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ObjectIdGetDatum(namespaceId));
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if (OidIsValid(collid))
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return collid;
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/* Check for any-encoding entry */
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collid = GetSysCacheOid3(COLLNAMEENCNSP,
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PointerGetDatum(collname),
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Int32GetDatum(-1),
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ObjectIdGetDatum(namespaceId));
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if (OidIsValid(collid))
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return collid;
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@ -2901,12 +2909,10 @@ get_collation_oid(List *name, bool missing_ok)
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{
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char *schemaname;
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char *collation_name;
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int32 dbencoding = GetDatabaseEncoding();
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Oid namespaceId;
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Oid colloid = InvalidOid;
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Oid colloid;
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ListCell *l;
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int encoding;
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encoding = GetDatabaseEncoding();
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/* deconstruct the name list */
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DeconstructQualifiedName(name, &schemaname, &collation_name);
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@ -2915,10 +2921,20 @@ get_collation_oid(List *name, bool missing_ok)
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{
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/* use exact schema given */
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namespaceId = LookupExplicitNamespace(schemaname);
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/* first try for encoding-specific entry, then any-encoding */
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colloid = GetSysCacheOid3(COLLNAMEENCNSP,
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PointerGetDatum(collation_name),
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Int32GetDatum(encoding),
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Int32GetDatum(dbencoding),
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ObjectIdGetDatum(namespaceId));
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if (OidIsValid(colloid))
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return colloid;
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colloid = GetSysCacheOid3(COLLNAMEENCNSP,
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PointerGetDatum(collation_name),
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Int32GetDatum(-1),
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ObjectIdGetDatum(namespaceId));
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if (OidIsValid(colloid))
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return colloid;
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}
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else
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{
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@ -2934,7 +2950,13 @@ get_collation_oid(List *name, bool missing_ok)
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colloid = GetSysCacheOid3(COLLNAMEENCNSP,
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PointerGetDatum(collation_name),
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Int32GetDatum(encoding),
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Int32GetDatum(dbencoding),
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ObjectIdGetDatum(namespaceId));
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if (OidIsValid(colloid))
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return colloid;
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colloid = GetSysCacheOid3(COLLNAMEENCNSP,
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PointerGetDatum(collation_name),
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Int32GetDatum(-1),
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ObjectIdGetDatum(namespaceId));
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if (OidIsValid(colloid))
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return colloid;
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@ -2942,12 +2964,12 @@ get_collation_oid(List *name, bool missing_ok)
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}
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/* Not found in path */
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if (!OidIsValid(colloid) && !missing_ok)
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if (!missing_ok)
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ereport(ERROR,
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(errcode(ERRCODE_UNDEFINED_OBJECT),
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errmsg("collation \"%s\" for current database encoding \"%s\" does not exist",
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errmsg("collation \"%s\" for encoding \"%s\" does not exist",
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NameListToString(name), GetDatabaseEncodingName())));
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return colloid;
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return InvalidOid;
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}
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/*
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@ -14,6 +14,7 @@
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*/
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#include "postgres.h"
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#include "access/genam.h"
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#include "access/heapam.h"
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#include "access/sysattr.h"
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#include "catalog/dependency.h"
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@ -22,16 +23,13 @@
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#include "catalog/pg_collation.h"
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#include "catalog/pg_collation_fn.h"
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#include "catalog/pg_namespace.h"
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#include "catalog/pg_proc.h"
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#include "mb/pg_wchar.h"
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#include "miscadmin.h"
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#include "utils/acl.h"
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#include "utils/builtins.h"
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#include "utils/fmgroids.h"
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#include "utils/rel.h"
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#include "utils/syscache.h"
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#include "utils/tqual.h"
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/*
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* CollationCreate
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*
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@ -43,12 +41,11 @@ CollationCreate(const char *collname, Oid collnamespace,
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int32 collencoding,
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const char *collcollate, const char *collctype)
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{
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int i;
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Relation rel;
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TupleDesc tupDesc;
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HeapTuple tup;
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bool nulls[Natts_pg_collation];
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Datum values[Natts_pg_collation];
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bool nulls[Natts_pg_collation];
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NameData name_name, name_collate, name_ctype;
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Oid oid;
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ObjectAddress myself,
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@ -60,7 +57,13 @@ CollationCreate(const char *collname, Oid collnamespace,
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AssertArg(collcollate);
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AssertArg(collctype);
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/* make sure there is no existing collation of same name */
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/*
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* Make sure there is no existing collation of same name & encoding.
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*
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* This would be caught by the unique index anyway; we're just giving
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* a friendlier error message. The unique index provides a backstop
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* against race conditions.
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*/
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if (SearchSysCacheExists3(COLLNAMEENCNSP,
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PointerGetDatum(collname),
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Int32GetDatum(collencoding),
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@ -70,18 +73,27 @@ CollationCreate(const char *collname, Oid collnamespace,
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errmsg("collation \"%s\" for encoding \"%s\" already exists",
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collname, pg_encoding_to_char(collencoding))));
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/*
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* Also forbid matching an any-encoding entry. This test of course is
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* not backed up by the unique index, but it's not a problem since we
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* don't support adding any-encoding entries after initdb.
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*/
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if (SearchSysCacheExists3(COLLNAMEENCNSP,
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PointerGetDatum(collname),
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Int32GetDatum(-1),
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ObjectIdGetDatum(collnamespace)))
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ereport(ERROR,
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(errcode(ERRCODE_DUPLICATE_OBJECT),
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errmsg("collation \"%s\" already exists",
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collname)));
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/* open pg_collation */
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rel = heap_open(CollationRelationId, RowExclusiveLock);
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tupDesc = rel->rd_att;
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/* initialize nulls and values */
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for (i = 0; i < Natts_pg_collation; i++)
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{
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nulls[i] = false;
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values[i] = (Datum) NULL;
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}
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tupDesc = RelationGetDescr(rel);
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/* form a tuple */
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memset(nulls, 0, sizeof(nulls));
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namestrcpy(&name_name, collname);
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values[Anum_pg_collation_collname - 1] = NameGetDatum(&name_name);
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values[Anum_pg_collation_collnamespace - 1] = ObjectIdGetDatum(collnamespace);
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@ -101,8 +113,9 @@ CollationCreate(const char *collname, Oid collnamespace,
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/* update the index if any */
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CatalogUpdateIndexes(rel, tup);
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/* set up dependencies for the new collation */
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myself.classId = CollationRelationId;
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myself.objectId = HeapTupleGetOid(tup);
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myself.objectId = oid;
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myself.objectSubId = 0;
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/* create dependency on namespace */
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@ -120,7 +133,7 @@ CollationCreate(const char *collname, Oid collnamespace,
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/* Post creation hook for new collation */
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InvokeObjectAccessHook(OAT_POST_CREATE,
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CollationRelationId, HeapTupleGetOid(tup), 0);
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CollationRelationId, oid, 0);
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heap_freetuple(tup);
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heap_close(rel, RowExclusiveLock);
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@ -138,26 +151,28 @@ void
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RemoveCollationById(Oid collationOid)
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{
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Relation rel;
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HeapTuple tuple;
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HeapScanDesc scan;
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ScanKeyData scanKeyData;
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SysScanDesc scandesc;
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HeapTuple tuple;
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rel = heap_open(CollationRelationId, RowExclusiveLock);
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ScanKeyInit(&scanKeyData,
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ObjectIdAttributeNumber,
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BTEqualStrategyNumber, F_OIDEQ,
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ObjectIdGetDatum(collationOid));
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/* open pg_collation */
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rel = heap_open(CollationRelationId, RowExclusiveLock);
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scandesc = systable_beginscan(rel, CollationOidIndexId, true,
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SnapshotNow, 1, &scanKeyData);
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scan = heap_beginscan(rel, SnapshotNow,
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1, &scanKeyData);
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tuple = systable_getnext(scandesc);
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/* search for the target tuple */
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if (HeapTupleIsValid(tuple = heap_getnext(scan, ForwardScanDirection)))
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if (HeapTupleIsValid(tuple))
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simple_heap_delete(rel, &tuple->t_self);
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else
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elog(ERROR, "could not find tuple for collation %u", collationOid);
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heap_endscan(scan);
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systable_endscan(scandesc);
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heap_close(rel, RowExclusiveLock);
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}
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@ -1,7 +1,7 @@
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/*-------------------------------------------------------------------------
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*
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* collationcmds.c
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* collation creation command support code
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* collation-related commands support code
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*
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* Portions Copyright (c) 1996-2011, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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@ -27,7 +27,6 @@
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#include "commands/defrem.h"
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#include "mb/pg_wchar.h"
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#include "miscadmin.h"
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#include "parser/parse_type.h"
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#include "utils/acl.h"
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#include "utils/builtins.h"
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#include "utils/lsyscache.h"
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@ -134,11 +133,11 @@ DefineCollation(List *names, List *parameters)
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check_encoding_locale_matches(GetDatabaseEncoding(), collcollate, collctype);
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newoid = CollationCreate(collName,
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collNamespace,
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GetUserId(),
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GetDatabaseEncoding(),
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collcollate,
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collctype);
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collNamespace,
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GetUserId(),
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GetDatabaseEncoding(),
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collcollate,
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collctype);
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/* check that the locales can be loaded */
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CommandCounterIncrement();
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@ -235,11 +234,22 @@ RenameCollation(List *name, const char *newname)
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ObjectIdGetDatum(namespaceOid)))
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ereport(ERROR,
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(errcode(ERRCODE_DUPLICATE_OBJECT),
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errmsg("collation \"%s\" for current database encoding \"%s\" already exists in schema \"%s\"",
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errmsg("collation \"%s\" for encoding \"%s\" already exists in schema \"%s\"",
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newname,
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GetDatabaseEncodingName(),
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get_namespace_name(namespaceOid))));
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/* mustn't match an any-encoding entry, either */
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if (SearchSysCacheExists3(COLLNAMEENCNSP,
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CStringGetDatum(newname),
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Int32GetDatum(-1),
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ObjectIdGetDatum(namespaceOid)))
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ereport(ERROR,
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(errcode(ERRCODE_DUPLICATE_OBJECT),
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errmsg("collation \"%s\" already exists in schema \"%s\"",
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newname,
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get_namespace_name(namespaceOid))));
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/* must be owner */
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if (!pg_collation_ownercheck(collationOid, GetUserId()))
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aclcheck_error(ACLCHECK_NOT_OWNER, ACL_KIND_COLLATION,
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@ -256,8 +266,9 @@ RenameCollation(List *name, const char *newname)
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simple_heap_update(rel, &tup->t_self, tup);
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CatalogUpdateIndexes(rel, tup);
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heap_close(rel, NoLock);
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heap_freetuple(tup);
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heap_close(rel, RowExclusiveLock);
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}
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/*
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@ -275,7 +286,7 @@ AlterCollationOwner(List *name, Oid newOwnerId)
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AlterCollationOwner_internal(rel, collationOid, newOwnerId);
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heap_close(rel, NoLock);
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heap_close(rel, RowExclusiveLock);
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}
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/*
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@ -290,7 +301,7 @@ AlterCollationOwner_oid(Oid collationOid, Oid newOwnerId)
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AlterCollationOwner_internal(rel, collationOid, newOwnerId);
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heap_close(rel, NoLock);
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heap_close(rel, RowExclusiveLock);
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}
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/*
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@ -364,24 +375,14 @@ AlterCollationOwner_internal(Relation rel, Oid collationOid, Oid newOwnerId)
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void
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AlterCollationNamespace(List *name, const char *newschema)
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{
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Oid collOid, nspOid;
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Relation rel;
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rel = heap_open(CollationRelationId, RowExclusiveLock);
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Oid collOid,
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nspOid;
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collOid = get_collation_oid(name, false);
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/* get schema OID */
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nspOid = LookupCreationNamespace(newschema);
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AlterObjectNamespace(rel, COLLOID, -1,
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collOid, nspOid,
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Anum_pg_collation_collname,
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Anum_pg_collation_collnamespace,
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Anum_pg_collation_collowner,
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ACL_KIND_COLLATION);
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heap_close(rel, NoLock);
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AlterCollationNamespace_oid(collOid, nspOid);
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}
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/*
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@ -392,9 +393,43 @@ AlterCollationNamespace_oid(Oid collOid, Oid newNspOid)
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{
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Oid oldNspOid;
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Relation rel;
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char *collation_name;
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rel = heap_open(CollationRelationId, RowExclusiveLock);
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/*
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* We have to check for name collision ourselves, because
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* AlterObjectNamespace doesn't know how to deal with the encoding
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* considerations.
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*/
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collation_name = get_collation_name(collOid);
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if (!collation_name)
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elog(ERROR, "cache lookup failed for collation %u", collOid);
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/* make sure the name doesn't already exist in new schema */
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if (SearchSysCacheExists3(COLLNAMEENCNSP,
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CStringGetDatum(collation_name),
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Int32GetDatum(GetDatabaseEncoding()),
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ObjectIdGetDatum(newNspOid)))
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ereport(ERROR,
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(errcode(ERRCODE_DUPLICATE_OBJECT),
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errmsg("collation \"%s\" for encoding \"%s\" already exists in schema \"%s\"",
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collation_name,
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GetDatabaseEncodingName(),
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get_namespace_name(newNspOid))));
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/* mustn't match an any-encoding entry, either */
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if (SearchSysCacheExists3(COLLNAMEENCNSP,
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CStringGetDatum(collation_name),
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Int32GetDatum(-1),
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ObjectIdGetDatum(newNspOid)))
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ereport(ERROR,
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(errcode(ERRCODE_DUPLICATE_OBJECT),
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errmsg("collation \"%s\" already exists in schema \"%s\"",
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collation_name,
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get_namespace_name(newNspOid))));
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/* OK, do the work */
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oldNspOid = AlterObjectNamespace(rel, COLLOID, -1,
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collOid, newNspOid,
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Anum_pg_collation_collname,
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@ -609,7 +609,7 @@ static const pgsql_thing_t words_after_create[] = {
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{"AGGREGATE", NULL, &Query_for_list_of_aggregates},
|
||||
{"CAST", NULL, NULL}, /* Casts have complex structures for names, so
|
||||
* skip it */
|
||||
{"COLLATION", "SELECT pg_catalog.quote_ident(collname) FROM pg_catalog.pg_collation WHERE collencoding = pg_char_to_encoding(getdatabaseencoding()) AND substring(pg_catalog.quote_ident(collname),1,%d)='%s'"},
|
||||
{"COLLATION", "SELECT pg_catalog.quote_ident(collname) FROM pg_catalog.pg_collation WHERE collencoding IN (-1, pg_catalog.pg_char_to_encoding(pg_catalog.getdatabaseencoding())) AND substring(pg_catalog.quote_ident(collname),1,%d)='%s'"},
|
||||
|
||||
/*
|
||||
* CREATE CONSTRAINT TRIGGER is not supported here because it is designed
|
||||
|
||||
@ -53,6 +53,6 @@
|
||||
*/
|
||||
|
||||
/* yyyymmddN */
|
||||
#define CATALOG_VERSION_NO 201103101
|
||||
#define CATALOG_VERSION_NO 201103111
|
||||
|
||||
#endif
|
||||
|
||||
@ -32,9 +32,9 @@
|
||||
CATALOG(pg_collation,3456)
|
||||
{
|
||||
NameData collname; /* collation name */
|
||||
Oid collnamespace; /* OID of namespace containing this collation */
|
||||
Oid collowner;
|
||||
int4 collencoding; /* encoding that this collation applies to */
|
||||
Oid collnamespace; /* OID of namespace containing collation */
|
||||
Oid collowner; /* owner of collation */
|
||||
int4 collencoding; /* encoding for this collation; -1 = "all" */
|
||||
NameData collcollate; /* LC_COLLATE setting */
|
||||
NameData collctype; /* LC_CTYPE setting */
|
||||
} FormData_pg_collation;
|
||||
@ -58,8 +58,8 @@ typedef FormData_pg_collation *Form_pg_collation;
|
||||
#define Anum_pg_collation_collcollate 5
|
||||
#define Anum_pg_collation_collctype 6
|
||||
|
||||
DATA(insert OID = 100 ( default PGNSP PGUID 0 "" "" ));
|
||||
DESCR("placeholder for default collation");
|
||||
DATA(insert OID = 100 ( default PGNSP PGUID -1 "" "" ));
|
||||
DESCR("database's default collation");
|
||||
#define DEFAULT_COLLATION_OID 100
|
||||
|
||||
#endif /* PG_COLLATION_H */
|
||||
|
||||
@ -18,14 +18,14 @@ CREATE TABLE collate_test_fail (
|
||||
a int,
|
||||
b text COLLATE "ja_JP.eucjp"
|
||||
);
|
||||
ERROR: collation "ja_JP.eucjp" for current database encoding "UTF8" does not exist
|
||||
ERROR: collation "ja_JP.eucjp" for encoding "UTF8" does not exist
|
||||
LINE 3: b text COLLATE "ja_JP.eucjp"
|
||||
^
|
||||
CREATE TABLE collate_test_fail (
|
||||
a int,
|
||||
b text COLLATE "foo"
|
||||
);
|
||||
ERROR: collation "foo" for current database encoding "UTF8" does not exist
|
||||
ERROR: collation "foo" for encoding "UTF8" does not exist
|
||||
LINE 3: b text COLLATE "foo"
|
||||
^
|
||||
CREATE TABLE collate_test_fail (
|
||||
@ -752,7 +752,7 @@ ERROR: parameter "lc_ctype" must be specified
|
||||
CREATE COLLATION testx (locale = 'nonsense'); -- fail
|
||||
ERROR: could not create locale "nonsense": No such file or directory
|
||||
CREATE COLLATION test4 FROM nonsense;
|
||||
ERROR: collation "nonsense" for current database encoding "UTF8" does not exist
|
||||
ERROR: collation "nonsense" for encoding "UTF8" does not exist
|
||||
CREATE COLLATION test5 FROM test0;
|
||||
SELECT collname, collencoding, collcollate, collctype FROM pg_collation WHERE collname LIKE 'test%' ORDER BY 1;
|
||||
collname | collencoding | collcollate | collctype
|
||||
@ -764,9 +764,9 @@ SELECT collname, collencoding, collcollate, collctype FROM pg_collation WHERE co
|
||||
|
||||
ALTER COLLATION test1 RENAME TO test11;
|
||||
ALTER COLLATION test0 RENAME TO test11; -- fail
|
||||
ERROR: collation "test11" for current database encoding "UTF8" already exists in schema "public"
|
||||
ERROR: collation "test11" for encoding "UTF8" already exists in schema "public"
|
||||
ALTER COLLATION test1 RENAME TO test22; -- fail
|
||||
ERROR: collation "test1" for current database encoding "UTF8" does not exist
|
||||
ERROR: collation "test1" for encoding "UTF8" does not exist
|
||||
ALTER COLLATION test11 OWNER TO regress_test_role;
|
||||
ALTER COLLATION test11 OWNER TO nonsense;
|
||||
ERROR: role "nonsense" does not exist
|
||||
@ -785,7 +785,7 @@ SELECT collname, nspname, obj_description(pg_collation.oid, 'pg_collation')
|
||||
|
||||
DROP COLLATION test0, test_schema.test11, test5;
|
||||
DROP COLLATION test0; -- fail
|
||||
ERROR: collation "test0" for current database encoding "UTF8" does not exist
|
||||
ERROR: collation "test0" for encoding "UTF8" does not exist
|
||||
DROP COLLATION IF EXISTS test0;
|
||||
NOTICE: collation "test0" does not exist, skipping
|
||||
SELECT collname FROM pg_collation WHERE collname LIKE 'test%';
|
||||
|
||||
Reference in New Issue
Block a user