2011-02-12 14:54:13 +01:00
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/*-------------------------------------------------------------------------
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*
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* collationcmds.c
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2011-03-11 19:20:11 +01:00
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* collation-related commands support code
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2011-02-12 14:54:13 +01:00
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*
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2014-01-07 22:05:30 +01:00
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* Portions Copyright (c) 1996-2014, PostgreSQL Global Development Group
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2011-02-12 14:54:13 +01:00
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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*
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* IDENTIFICATION
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* src/backend/commands/collationcmds.c
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*
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*-------------------------------------------------------------------------
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*/
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#include "postgres.h"
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#include "access/heapam.h"
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2012-08-30 22:15:44 +02:00
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#include "access/htup_details.h"
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2011-03-04 21:14:37 +01:00
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#include "access/xact.h"
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2011-02-12 14:54:13 +01:00
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#include "catalog/dependency.h"
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#include "catalog/indexing.h"
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#include "catalog/namespace.h"
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#include "catalog/pg_collation.h"
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#include "catalog/pg_collation_fn.h"
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#include "commands/alter.h"
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#include "commands/collationcmds.h"
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#include "commands/dbcommands.h"
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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 "utils/builtins.h"
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#include "utils/lsyscache.h"
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2011-03-04 21:14:37 +01:00
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#include "utils/pg_locale.h"
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2011-03-26 04:10:07 +01:00
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#include "utils/rel.h"
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2011-02-12 14:54:13 +01:00
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#include "utils/syscache.h"
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/*
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* CREATE COLLATION
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*/
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2012-12-24 00:25:03 +01:00
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Oid
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2011-02-12 14:54:13 +01:00
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DefineCollation(List *names, List *parameters)
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{
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char *collName;
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Oid collNamespace;
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AclResult aclresult;
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ListCell *pl;
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2011-04-10 17:42:00 +02:00
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DefElem *fromEl = NULL;
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DefElem *localeEl = NULL;
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DefElem *lccollateEl = NULL;
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DefElem *lcctypeEl = NULL;
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2011-02-12 14:54:13 +01:00
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char *collcollate = NULL;
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char *collctype = NULL;
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2011-03-04 21:14:37 +01:00
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Oid newoid;
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2011-02-12 14:54:13 +01:00
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collNamespace = QualifiedNameGetCreationNamespace(names, &collName);
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aclresult = pg_namespace_aclcheck(collNamespace, GetUserId(), ACL_CREATE);
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if (aclresult != ACLCHECK_OK)
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aclcheck_error(aclresult, ACL_KIND_NAMESPACE,
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get_namespace_name(collNamespace));
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foreach(pl, parameters)
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{
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2011-04-10 17:42:00 +02:00
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DefElem *defel = (DefElem *) lfirst(pl);
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2011-02-12 14:54:13 +01:00
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DefElem **defelp;
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if (pg_strcasecmp(defel->defname, "from") == 0)
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defelp = &fromEl;
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else if (pg_strcasecmp(defel->defname, "locale") == 0)
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defelp = &localeEl;
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else if (pg_strcasecmp(defel->defname, "lc_collate") == 0)
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defelp = &lccollateEl;
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else if (pg_strcasecmp(defel->defname, "lc_ctype") == 0)
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defelp = &lcctypeEl;
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else
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{
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ereport(ERROR,
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(errcode(ERRCODE_SYNTAX_ERROR),
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errmsg("collation attribute \"%s\" not recognized",
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defel->defname)));
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break;
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}
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*defelp = defel;
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}
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if ((localeEl && (lccollateEl || lcctypeEl))
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|| (fromEl && list_length(parameters) != 1))
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ereport(ERROR,
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(errcode(ERRCODE_SYNTAX_ERROR),
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errmsg("conflicting or redundant options")));
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if (fromEl)
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{
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Oid collid;
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HeapTuple tp;
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2011-04-10 17:42:00 +02:00
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collid = get_collation_oid(defGetQualifiedName(fromEl), false);
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2011-02-12 14:54:13 +01:00
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tp = SearchSysCache1(COLLOID, ObjectIdGetDatum(collid));
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if (!HeapTupleIsValid(tp))
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elog(ERROR, "cache lookup failed for collation %u", collid);
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collcollate = pstrdup(NameStr(((Form_pg_collation) GETSTRUCT(tp))->collcollate));
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collctype = pstrdup(NameStr(((Form_pg_collation) GETSTRUCT(tp))->collctype));
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ReleaseSysCache(tp);
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}
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if (localeEl)
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{
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collcollate = defGetString(localeEl);
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collctype = defGetString(localeEl);
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}
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if (lccollateEl)
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collcollate = defGetString(lccollateEl);
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if (lcctypeEl)
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collctype = defGetString(lcctypeEl);
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if (!collcollate)
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ereport(ERROR,
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(errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
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2011-09-07 19:29:26 +02:00
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errmsg("parameter \"lc_collate\" must be specified")));
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2011-02-12 14:54:13 +01:00
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if (!collctype)
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ereport(ERROR,
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(errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
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errmsg("parameter \"lc_ctype\" must be specified")));
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check_encoding_locale_matches(GetDatabaseEncoding(), collcollate, collctype);
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2011-03-04 21:14:37 +01:00
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newoid = CollationCreate(collName,
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2011-03-11 19:20:11 +01:00
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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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2011-03-04 21:14:37 +01:00
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/* check that the locales can be loaded */
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CommandCounterIncrement();
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2011-03-22 21:55:32 +01:00
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(void) pg_newlocale_from_collation(newoid);
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2012-12-24 00:25:03 +01:00
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return newoid;
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2011-02-12 14:54:13 +01:00
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}
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/*
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Rework order of checks in ALTER / SET SCHEMA
When attempting to move an object into the schema in which it already
was, for most objects classes we were correctly complaining about
exactly that ("object is already in schema"); but for some other object
classes, such as functions, we were instead complaining of a name
collision ("object already exists in schema"). The latter is wrong and
misleading, per complaint from Robert Haas in
CA+TgmoZ0+gNf7RDKRc3u5rHXffP=QjqPZKGxb4BsPz65k7qnHQ@mail.gmail.com
To fix, refactor the way these checks are done. As a bonus, the
resulting code is smaller and can also share some code with Rename
cases.
While at it, remove use of getObjectDescriptionOids() in error messages.
These are normally disallowed because of translatability considerations,
but this one had slipped through since 9.1. (Not sure that this is
worth backpatching, though, as it would create some untranslated
messages in back branches.)
This is loosely based on a patch by KaiGai Kohei, heavily reworked by
me.
2013-01-15 17:23:43 +01:00
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* Subroutine for ALTER COLLATION SET SCHEMA and RENAME
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*
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* Is there a collation with the same name of the given collation already in
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* the given namespace? If so, raise an appropriate error message.
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2011-02-12 14:54:13 +01:00
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*/
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Rework order of checks in ALTER / SET SCHEMA
When attempting to move an object into the schema in which it already
was, for most objects classes we were correctly complaining about
exactly that ("object is already in schema"); but for some other object
classes, such as functions, we were instead complaining of a name
collision ("object already exists in schema"). The latter is wrong and
misleading, per complaint from Robert Haas in
CA+TgmoZ0+gNf7RDKRc3u5rHXffP=QjqPZKGxb4BsPz65k7qnHQ@mail.gmail.com
To fix, refactor the way these checks are done. As a bonus, the
resulting code is smaller and can also share some code with Rename
cases.
While at it, remove use of getObjectDescriptionOids() in error messages.
These are normally disallowed because of translatability considerations,
but this one had slipped through since 9.1. (Not sure that this is
worth backpatching, though, as it would create some untranslated
messages in back branches.)
This is loosely based on a patch by KaiGai Kohei, heavily reworked by
me.
2013-01-15 17:23:43 +01:00
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void
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IsThereCollationInNamespace(const char *collname, Oid nspOid)
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2011-02-12 14:54:13 +01:00
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{
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2011-03-11 19:20:11 +01:00
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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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Rework order of checks in ALTER / SET SCHEMA
When attempting to move an object into the schema in which it already
was, for most objects classes we were correctly complaining about
exactly that ("object is already in schema"); but for some other object
classes, such as functions, we were instead complaining of a name
collision ("object already exists in schema"). The latter is wrong and
misleading, per complaint from Robert Haas in
CA+TgmoZ0+gNf7RDKRc3u5rHXffP=QjqPZKGxb4BsPz65k7qnHQ@mail.gmail.com
To fix, refactor the way these checks are done. As a bonus, the
resulting code is smaller and can also share some code with Rename
cases.
While at it, remove use of getObjectDescriptionOids() in error messages.
These are normally disallowed because of translatability considerations,
but this one had slipped through since 9.1. (Not sure that this is
worth backpatching, though, as it would create some untranslated
messages in back branches.)
This is loosely based on a patch by KaiGai Kohei, heavily reworked by
me.
2013-01-15 17:23:43 +01:00
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CStringGetDatum(collname),
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2011-03-11 19:20:11 +01:00
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Int32GetDatum(GetDatabaseEncoding()),
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Rework order of checks in ALTER / SET SCHEMA
When attempting to move an object into the schema in which it already
was, for most objects classes we were correctly complaining about
exactly that ("object is already in schema"); but for some other object
classes, such as functions, we were instead complaining of a name
collision ("object already exists in schema"). The latter is wrong and
misleading, per complaint from Robert Haas in
CA+TgmoZ0+gNf7RDKRc3u5rHXffP=QjqPZKGxb4BsPz65k7qnHQ@mail.gmail.com
To fix, refactor the way these checks are done. As a bonus, the
resulting code is smaller and can also share some code with Rename
cases.
While at it, remove use of getObjectDescriptionOids() in error messages.
These are normally disallowed because of translatability considerations,
but this one had slipped through since 9.1. (Not sure that this is
worth backpatching, though, as it would create some untranslated
messages in back branches.)
This is loosely based on a patch by KaiGai Kohei, heavily reworked by
me.
2013-01-15 17:23:43 +01:00
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ObjectIdGetDatum(nspOid)))
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2011-03-11 19:20:11 +01:00
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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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Rework order of checks in ALTER / SET SCHEMA
When attempting to move an object into the schema in which it already
was, for most objects classes we were correctly complaining about
exactly that ("object is already in schema"); but for some other object
classes, such as functions, we were instead complaining of a name
collision ("object already exists in schema"). The latter is wrong and
misleading, per complaint from Robert Haas in
CA+TgmoZ0+gNf7RDKRc3u5rHXffP=QjqPZKGxb4BsPz65k7qnHQ@mail.gmail.com
To fix, refactor the way these checks are done. As a bonus, the
resulting code is smaller and can also share some code with Rename
cases.
While at it, remove use of getObjectDescriptionOids() in error messages.
These are normally disallowed because of translatability considerations,
but this one had slipped through since 9.1. (Not sure that this is
worth backpatching, though, as it would create some untranslated
messages in back branches.)
This is loosely based on a patch by KaiGai Kohei, heavily reworked by
me.
2013-01-15 17:23:43 +01:00
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collname, GetDatabaseEncodingName(),
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get_namespace_name(nspOid))));
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2011-03-11 19:20:11 +01:00
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/* mustn't match an any-encoding entry, either */
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if (SearchSysCacheExists3(COLLNAMEENCNSP,
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Rework order of checks in ALTER / SET SCHEMA
When attempting to move an object into the schema in which it already
was, for most objects classes we were correctly complaining about
exactly that ("object is already in schema"); but for some other object
classes, such as functions, we were instead complaining of a name
collision ("object already exists in schema"). The latter is wrong and
misleading, per complaint from Robert Haas in
CA+TgmoZ0+gNf7RDKRc3u5rHXffP=QjqPZKGxb4BsPz65k7qnHQ@mail.gmail.com
To fix, refactor the way these checks are done. As a bonus, the
resulting code is smaller and can also share some code with Rename
cases.
While at it, remove use of getObjectDescriptionOids() in error messages.
These are normally disallowed because of translatability considerations,
but this one had slipped through since 9.1. (Not sure that this is
worth backpatching, though, as it would create some untranslated
messages in back branches.)
This is loosely based on a patch by KaiGai Kohei, heavily reworked by
me.
2013-01-15 17:23:43 +01:00
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CStringGetDatum(collname),
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2011-03-11 19:20:11 +01:00
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Int32GetDatum(-1),
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Rework order of checks in ALTER / SET SCHEMA
When attempting to move an object into the schema in which it already
was, for most objects classes we were correctly complaining about
exactly that ("object is already in schema"); but for some other object
classes, such as functions, we were instead complaining of a name
collision ("object already exists in schema"). The latter is wrong and
misleading, per complaint from Robert Haas in
CA+TgmoZ0+gNf7RDKRc3u5rHXffP=QjqPZKGxb4BsPz65k7qnHQ@mail.gmail.com
To fix, refactor the way these checks are done. As a bonus, the
resulting code is smaller and can also share some code with Rename
cases.
While at it, remove use of getObjectDescriptionOids() in error messages.
These are normally disallowed because of translatability considerations,
but this one had slipped through since 9.1. (Not sure that this is
worth backpatching, though, as it would create some untranslated
messages in back branches.)
This is loosely based on a patch by KaiGai Kohei, heavily reworked by
me.
2013-01-15 17:23:43 +01:00
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ObjectIdGetDatum(nspOid)))
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2011-03-11 19:20:11 +01:00
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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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Rework order of checks in ALTER / SET SCHEMA
When attempting to move an object into the schema in which it already
was, for most objects classes we were correctly complaining about
exactly that ("object is already in schema"); but for some other object
classes, such as functions, we were instead complaining of a name
collision ("object already exists in schema"). The latter is wrong and
misleading, per complaint from Robert Haas in
CA+TgmoZ0+gNf7RDKRc3u5rHXffP=QjqPZKGxb4BsPz65k7qnHQ@mail.gmail.com
To fix, refactor the way these checks are done. As a bonus, the
resulting code is smaller and can also share some code with Rename
cases.
While at it, remove use of getObjectDescriptionOids() in error messages.
These are normally disallowed because of translatability considerations,
but this one had slipped through since 9.1. (Not sure that this is
worth backpatching, though, as it would create some untranslated
messages in back branches.)
This is loosely based on a patch by KaiGai Kohei, heavily reworked by
me.
2013-01-15 17:23:43 +01:00
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collname, get_namespace_name(nspOid))));
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2011-02-12 14:54:13 +01:00
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}
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