mirror of https://github.com/postgres/postgres
Support temporary setting of search path during CREATE SCHEMA; this
allows the example in the CREATE SCHEMA ref page to actually work now. Also, clean up when the transaction that initially creates a temp-table namespace is later aborted. Simplify internal representation of search path by folding special cases into the main list.
This commit is contained in:
Tom Lane
parent
5f21560ae8
commit
940f772a29
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@ -8,7 +8,7 @@
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*
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*
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* IDENTIFICATION
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* $Header: /cvsroot/pgsql/src/backend/access/transam/xact.c,v 1.121 2002/05/17 01:19:16 tgl Exp $
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* $Header: /cvsroot/pgsql/src/backend/access/transam/xact.c,v 1.122 2002/05/17 20:53:33 tgl Exp $
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*
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* NOTES
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* Transaction aborts can now occur two ways:
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@ -164,6 +164,7 @@
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#include "access/xact.h"
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#include "catalog/heap.h"
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#include "catalog/index.h"
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#include "catalog/namespace.h"
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#include "commands/async.h"
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#include "commands/sequence.h"
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#include "commands/trigger.h"
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@ -1009,6 +1010,7 @@ CommitTransaction(void)
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AtEOXact_hash();
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AtEOXact_nbtree();
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AtEOXact_rtree();
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AtEOXact_Namespace(true);
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AtCommit_Cache();
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AtCommit_Locks();
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AtEOXact_CatCache(true);
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@ -1112,6 +1114,7 @@ AbortTransaction(void)
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AtEOXact_hash();
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AtEOXact_nbtree();
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AtEOXact_rtree();
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AtEOXact_Namespace(false);
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AtAbort_Cache();
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AtEOXact_CatCache(false);
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AtAbort_Memory();
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@ -13,7 +13,7 @@
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* IDENTIFICATION
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* $Header: /cvsroot/pgsql/src/backend/catalog/namespace.c,v 1.20 2002/05/17 01:19:16 tgl Exp $
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* $Header: /cvsroot/pgsql/src/backend/catalog/namespace.c,v 1.21 2002/05/17 20:53:33 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -49,18 +49,27 @@
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/*
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* The namespace search path is a possibly-empty list of namespace OIDs.
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* In addition to the explicit list, the TEMP table namespace is always
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* implicitly searched first (if it's been initialized). Also, the system
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* catalog namespace is always searched. If the system namespace is
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* explicitly present in the path then it will be searched in the specified
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* order; otherwise it will be searched after TEMP tables and *before* the
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* explicit list. (It might seem that the system namespace should be
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* implicitly last, but this behavior appears to be required by SQL99.
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* Also, this provides a way to search the system namespace first without
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* thereby making it the default creation target namespace.)
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* In addition to the explicit list, several implicitly-searched namespaces
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* may be included:
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*
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* The default creation target namespace is kept equal to the first element
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* of the (explicit) list. If the list is empty, there is no default target.
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* 1. If a "special" namespace has been set by PushSpecialNamespace, it is
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* always searched first. (This is a hack for CREATE SCHEMA.)
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*
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* 2. If a TEMP table namespace has been initialized in this session, it
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* is always searched just after any special namespace.
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*
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* 3. The system catalog namespace is always searched. If the system
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* namespace is present in the explicit path then it will be searched in
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* the specified order; otherwise it will be searched after TEMP tables and
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* *before* the explicit list. (It might seem that the system namespace
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* should be implicitly last, but this behavior appears to be required by
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* SQL99. Also, this provides a way to search the system namespace first
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* without thereby making it the default creation target namespace.)
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*
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* The default creation target namespace is normally equal to the first
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* element of the explicit list, but is the "special" namespace when one
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* has been set. If the explicit list is empty and there is no special
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* namespace, there is no default target.
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*
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* In bootstrap mode, the search path is set equal to 'pg_catalog', so that
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* the system namespace is the only one searched or inserted into.
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@ -70,7 +79,7 @@
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* namespace (if it exists), preceded by the user's personal namespace
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* (if one exists).
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*
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* If namespaceSearchPathValid is false, then namespaceSearchPath (and the
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* If namespaceSearchPathValid is false, then namespaceSearchPath (and other
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* derived variables) need to be recomputed from namespace_search_path.
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* We mark it invalid upon an assignment to namespace_search_path or receipt
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* of a syscache invalidation event for pg_namespace. The recomputation
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@ -84,23 +93,34 @@
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static List *namespaceSearchPath = NIL;
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static bool namespaceSearchPathValid = true;
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static Oid namespaceUser = InvalidOid;
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/* this flag must be updated correctly when namespaceSearchPath is changed */
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static bool pathContainsSystemNamespace = false;
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/* default place to create stuff; if InvalidOid, no default */
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static Oid defaultCreationNamespace = InvalidOid;
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/* first explicit member of list; usually same as defaultCreationNamespace */
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static Oid firstExplicitNamespace = InvalidOid;
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/* The above four values are valid only if namespaceSearchPathValid */
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static bool namespaceSearchPathValid = true;
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/*
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* myTempNamespace is InvalidOid until and unless a TEMP namespace is set up
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* in a particular backend session (this happens when a CREATE TEMP TABLE
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* command is first executed). Thereafter it's the OID of the temp namespace.
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* firstTempTransaction flags whether we've committed creation of the TEMP
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* namespace or not.
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*/
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static Oid myTempNamespace = InvalidOid;
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static bool firstTempTransaction = false;
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/*
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* "Special" namespace for CREATE SCHEMA. If set, it's the first search
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* path element, and also the default creation namespace.
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*/
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static Oid mySpecialNamespace = InvalidOid;
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/*
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* This is the text equivalent of the search path --- it's the value
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* of the GUC variable 'search_path'.
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@ -122,7 +142,7 @@ typedef struct DelConstraint
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/* Local functions */
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static void recomputeNamespacePath(void);
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static Oid GetTempTableNamespace(void);
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static void InitTempTableNamespace(void);
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static void RemoveTempRelations(Oid tempNamespaceId);
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static List *FindTempRelations(Oid tempNamespaceId);
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static List *FindDeletionConstraints(List *relOids);
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@ -219,7 +239,7 @@ RangeVarGetCreationNamespace(const RangeVar *newRelation)
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elog(ERROR, "TEMP tables may not specify a namespace");
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/* Initialize temp namespace if first time through */
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if (!OidIsValid(myTempNamespace))
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myTempNamespace = GetTempTableNamespace();
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InitTempTableNamespace();
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return myTempNamespace;
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}
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@ -260,31 +280,6 @@ RelnameGetRelid(const char *relname)
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recomputeNamespacePath();
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/*
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* If a TEMP-table namespace has been set up, it is implicitly first
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* in the search path. We do not need to check USAGE permission.
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*/
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if (OidIsValid(myTempNamespace))
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{
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relid = get_relname_relid(relname, myTempNamespace);
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if (OidIsValid(relid))
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return relid;
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}
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/*
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* If system namespace is not in path, implicitly search it before path.
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* We do not check USAGE permission.
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*/
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if (!pathContainsSystemNamespace)
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{
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relid = get_relname_relid(relname, PG_CATALOG_NAMESPACE);
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if (OidIsValid(relid))
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return relid;
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}
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/*
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* Else search the path
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*/
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foreach(lptr, namespaceSearchPath)
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{
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Oid namespaceId = (Oid) lfirsti(lptr);
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@ -312,8 +307,6 @@ RelationIsVisible(Oid relid)
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Oid relnamespace;
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bool visible;
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recomputeNamespacePath();
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reltup = SearchSysCache(RELOID,
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ObjectIdGetDatum(relid),
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0, 0, 0);
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@ -321,12 +314,15 @@ RelationIsVisible(Oid relid)
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elog(ERROR, "Cache lookup failed for relation %u", relid);
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relform = (Form_pg_class) GETSTRUCT(reltup);
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recomputeNamespacePath();
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/*
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* Quick check: if it ain't in the path at all, it ain't visible.
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* Items in the system namespace are surely in the path and so we
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* needn't even do intMember() for them.
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*/
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relnamespace = relform->relnamespace;
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if (relnamespace != myTempNamespace &&
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relnamespace != PG_CATALOG_NAMESPACE &&
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if (relnamespace != PG_CATALOG_NAMESPACE &&
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!intMember(relnamespace, namespaceSearchPath))
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visible = false;
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else
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@ -353,9 +349,7 @@ RelationIsVisible(Oid relid)
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* Try to resolve an unqualified datatype name.
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* Returns OID if type found in search path, else InvalidOid.
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*
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* This is essentially the same as RelnameGetRelid, but we never search
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* the TEMP table namespace --- there is no reason to refer to the types
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* of temp tables, AFAICS.
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* This is essentially the same as RelnameGetRelid.
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*/
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Oid
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TypenameGetTypid(const char *typname)
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@ -365,22 +359,6 @@ TypenameGetTypid(const char *typname)
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recomputeNamespacePath();
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/*
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* If system namespace is not in path, implicitly search it before path
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*/
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if (!pathContainsSystemNamespace)
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{
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typid = GetSysCacheOid(TYPENAMENSP,
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PointerGetDatum(typname),
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ObjectIdGetDatum(PG_CATALOG_NAMESPACE),
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0, 0);
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if (OidIsValid(typid))
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return typid;
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}
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/*
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* Else search the path
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*/
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foreach(lptr, namespaceSearchPath)
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{
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Oid namespaceId = (Oid) lfirsti(lptr);
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@ -411,8 +389,6 @@ TypeIsVisible(Oid typid)
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Oid typnamespace;
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bool visible;
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recomputeNamespacePath();
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typtup = SearchSysCache(TYPEOID,
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ObjectIdGetDatum(typid),
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0, 0, 0);
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@ -420,8 +396,12 @@ TypeIsVisible(Oid typid)
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elog(ERROR, "Cache lookup failed for type %u", typid);
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typform = (Form_pg_type) GETSTRUCT(typtup);
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recomputeNamespacePath();
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/*
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* Quick check: if it ain't in the path at all, it ain't visible.
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* Items in the system namespace are surely in the path and so we
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* needn't even do intMember() for them.
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*/
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typnamespace = typform->typnamespace;
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if (typnamespace != PG_CATALOG_NAMESPACE &&
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@ -549,20 +529,16 @@ FuncnameGetCandidates(List *names, int nargs)
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else
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{
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/* Consider only procs that are in the search path */
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if (pathContainsSystemNamespace ||
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!IsSystemNamespace(procform->pronamespace))
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{
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List *nsp;
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List *nsp;
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foreach(nsp, namespaceSearchPath)
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{
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pathpos++;
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if (procform->pronamespace == (Oid) lfirsti(nsp))
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break;
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}
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if (nsp == NIL)
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continue; /* proc is not in search path */
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foreach(nsp, namespaceSearchPath)
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{
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if (procform->pronamespace == (Oid) lfirsti(nsp))
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break;
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pathpos++;
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}
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if (nsp == NIL)
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continue; /* proc is not in search path */
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/*
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* Okay, it's in the search path, but does it have the same
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@ -648,8 +624,6 @@ FunctionIsVisible(Oid funcid)
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Oid pronamespace;
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bool visible;
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recomputeNamespacePath();
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proctup = SearchSysCache(PROCOID,
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ObjectIdGetDatum(funcid),
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0, 0, 0);
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@ -657,8 +631,12 @@ FunctionIsVisible(Oid funcid)
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elog(ERROR, "Cache lookup failed for procedure %u", funcid);
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procform = (Form_pg_proc) GETSTRUCT(proctup);
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recomputeNamespacePath();
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/*
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* Quick check: if it ain't in the path at all, it ain't visible.
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* Items in the system namespace are surely in the path and so we
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* needn't even do intMember() for them.
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*/
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pronamespace = procform->pronamespace;
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if (pronamespace != PG_CATALOG_NAMESPACE &&
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@ -800,20 +778,16 @@ OpernameGetCandidates(List *names, char oprkind)
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else
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{
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/* Consider only opers that are in the search path */
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if (pathContainsSystemNamespace ||
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!IsSystemNamespace(operform->oprnamespace))
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{
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List *nsp;
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List *nsp;
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foreach(nsp, namespaceSearchPath)
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{
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pathpos++;
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if (operform->oprnamespace == (Oid) lfirsti(nsp))
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break;
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}
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if (nsp == NIL)
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continue; /* oper is not in search path */
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foreach(nsp, namespaceSearchPath)
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{
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if (operform->oprnamespace == (Oid) lfirsti(nsp))
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break;
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pathpos++;
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}
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if (nsp == NIL)
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continue; /* oper is not in search path */
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/*
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* Okay, it's in the search path, but does it have the same
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@ -896,8 +870,6 @@ OperatorIsVisible(Oid oprid)
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Oid oprnamespace;
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bool visible;
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recomputeNamespacePath();
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oprtup = SearchSysCache(OPEROID,
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ObjectIdGetDatum(oprid),
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0, 0, 0);
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@ -905,8 +877,12 @@ OperatorIsVisible(Oid oprid)
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elog(ERROR, "Cache lookup failed for operator %u", oprid);
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oprform = (Form_pg_operator) GETSTRUCT(oprtup);
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recomputeNamespacePath();
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/*
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* Quick check: if it ain't in the path at all, it ain't visible.
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* Items in the system namespace are surely in the path and so we
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* needn't even do intMember() for them.
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*/
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oprnamespace = oprform->oprnamespace;
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if (oprnamespace != PG_CATALOG_NAMESPACE &&
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@ -963,35 +939,30 @@ OpclassGetCandidates(Oid amid)
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CatCList *catlist;
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int i;
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recomputeNamespacePath();
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/* Search syscache by AM OID only */
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catlist = SearchSysCacheList(CLAAMNAMENSP, 1,
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ObjectIdGetDatum(amid),
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0, 0, 0);
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recomputeNamespacePath();
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for (i = 0; i < catlist->n_members; i++)
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{
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HeapTuple opctup = &catlist->members[i]->tuple;
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Form_pg_opclass opcform = (Form_pg_opclass) GETSTRUCT(opctup);
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int pathpos = 0;
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OpclassCandidateList newResult;
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List *nsp;
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/* Consider only opclasses that are in the search path */
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if (pathContainsSystemNamespace ||
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!IsSystemNamespace(opcform->opcnamespace))
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foreach(nsp, namespaceSearchPath)
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{
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List *nsp;
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foreach(nsp, namespaceSearchPath)
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{
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pathpos++;
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if (opcform->opcnamespace == (Oid) lfirsti(nsp))
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break;
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}
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if (nsp == NIL)
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continue; /* opclass is not in search path */
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if (opcform->opcnamespace == (Oid) lfirsti(nsp))
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break;
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pathpos++;
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}
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if (nsp == NIL)
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continue; /* opclass is not in search path */
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/*
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* Okay, it's in the search path, but does it have the same name
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@ -1080,23 +1051,6 @@ OpclassnameGetOpcid(Oid amid, const char *opcname)
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recomputeNamespacePath();
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/*
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* If system namespace is not in path, implicitly search it before path
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*/
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if (!pathContainsSystemNamespace)
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{
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opcid = GetSysCacheOid(CLAAMNAMENSP,
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ObjectIdGetDatum(amid),
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PointerGetDatum(opcname),
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ObjectIdGetDatum(PG_CATALOG_NAMESPACE),
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0);
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if (OidIsValid(opcid))
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return opcid;
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}
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/*
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* Else search the path
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*/
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foreach(lptr, namespaceSearchPath)
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{
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Oid namespaceId = (Oid) lfirsti(lptr);
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@ -1128,8 +1082,6 @@ OpclassIsVisible(Oid opcid)
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Oid opcnamespace;
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bool visible;
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recomputeNamespacePath();
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opctup = SearchSysCache(CLAOID,
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ObjectIdGetDatum(opcid),
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0, 0, 0);
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@ -1137,8 +1089,12 @@ OpclassIsVisible(Oid opcid)
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elog(ERROR, "Cache lookup failed for opclass %u", opcid);
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opcform = (Form_pg_opclass) GETSTRUCT(opctup);
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recomputeNamespacePath();
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/*
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* Quick check: if it ain't in the path at all, it ain't visible.
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* Items in the system namespace are surely in the path and so we
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* needn't even do intMember() for them.
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*/
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opcnamespace = opcform->opcnamespace;
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if (opcnamespace != PG_CATALOG_NAMESPACE &&
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|
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@ -1296,6 +1252,36 @@ isTempNamespace(Oid namespaceId)
|
|||
return false;
|
||||
}
|
||||
|
||||
/*
|
||||
* PushSpecialNamespace - push a "special" namespace onto the front of the
|
||||
* search path.
|
||||
*
|
||||
* This is a slightly messy hack intended only for support of CREATE SCHEMA.
|
||||
* Although the API is defined to allow a stack of pushed namespaces, we
|
||||
* presently only support one at a time.
|
||||
*
|
||||
* The pushed namespace will be removed from the search path at end of
|
||||
* transaction, whether commit or abort.
|
||||
*/
|
||||
void
|
||||
PushSpecialNamespace(Oid namespaceId)
|
||||
{
|
||||
Assert(!OidIsValid(mySpecialNamespace));
|
||||
mySpecialNamespace = namespaceId;
|
||||
namespaceSearchPathValid = false;
|
||||
}
|
||||
|
||||
/*
|
||||
* PopSpecialNamespace - remove previously pushed special namespace.
|
||||
*/
|
||||
void
|
||||
PopSpecialNamespace(Oid namespaceId)
|
||||
{
|
||||
Assert(mySpecialNamespace == namespaceId);
|
||||
mySpecialNamespace = InvalidOid;
|
||||
namespaceSearchPathValid = false;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* recomputeNamespacePath - recompute path derived variables if needed.
|
||||
|
|
@ -1309,6 +1295,7 @@ recomputeNamespacePath(void)
|
|||
List *oidlist;
|
||||
List *newpath;
|
||||
List *l;
|
||||
Oid firstNS;
|
||||
MemoryContext oldcxt;
|
||||
|
||||
/*
|
||||
|
|
@ -1332,7 +1319,7 @@ recomputeNamespacePath(void)
|
|||
* Convert the list of names to a list of OIDs. If any names are not
|
||||
* recognizable or we don't have read access, just leave them out of
|
||||
* the list. (We can't raise an error, since the search_path setting
|
||||
* has already been accepted.)
|
||||
* has already been accepted.) Don't make duplicate entries, either.
|
||||
*/
|
||||
oidlist = NIL;
|
||||
foreach(l, namelist)
|
||||
|
|
@ -1358,6 +1345,7 @@ recomputeNamespacePath(void)
|
|||
0, 0, 0);
|
||||
ReleaseSysCache(tuple);
|
||||
if (OidIsValid(namespaceId) &&
|
||||
!intMember(namespaceId, oidlist) &&
|
||||
pg_namespace_aclcheck(namespaceId, userId,
|
||||
ACL_USAGE) == ACLCHECK_OK)
|
||||
oidlist = lappendi(oidlist, namespaceId);
|
||||
|
|
@ -1370,12 +1358,37 @@ recomputeNamespacePath(void)
|
|||
CStringGetDatum(curname),
|
||||
0, 0, 0);
|
||||
if (OidIsValid(namespaceId) &&
|
||||
!intMember(namespaceId, oidlist) &&
|
||||
pg_namespace_aclcheck(namespaceId, userId,
|
||||
ACL_USAGE) == ACLCHECK_OK)
|
||||
oidlist = lappendi(oidlist, namespaceId);
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* Remember the first member of the explicit list.
|
||||
*/
|
||||
if (oidlist == NIL)
|
||||
firstNS = InvalidOid;
|
||||
else
|
||||
firstNS = (Oid) lfirsti(oidlist);
|
||||
|
||||
/*
|
||||
* Add any implicitly-searched namespaces to the list. Note these
|
||||
* go on the front, not the back; also notice that we do not check
|
||||
* USAGE permissions for these.
|
||||
*/
|
||||
if (!intMember(PG_CATALOG_NAMESPACE, oidlist))
|
||||
oidlist = lconsi(PG_CATALOG_NAMESPACE, oidlist);
|
||||
|
||||
if (OidIsValid(myTempNamespace) &&
|
||||
!intMember(myTempNamespace, oidlist))
|
||||
oidlist = lconsi(myTempNamespace, oidlist);
|
||||
|
||||
if (OidIsValid(mySpecialNamespace) &&
|
||||
!intMember(mySpecialNamespace, oidlist))
|
||||
oidlist = lconsi(mySpecialNamespace, oidlist);
|
||||
|
||||
/*
|
||||
* Now that we've successfully built the new list of namespace OIDs,
|
||||
* save it in permanent storage.
|
||||
|
|
@ -1391,13 +1404,11 @@ recomputeNamespacePath(void)
|
|||
/*
|
||||
* Update info derived from search path.
|
||||
*/
|
||||
pathContainsSystemNamespace = intMember(PG_CATALOG_NAMESPACE,
|
||||
namespaceSearchPath);
|
||||
|
||||
if (namespaceSearchPath == NIL)
|
||||
defaultCreationNamespace = InvalidOid;
|
||||
firstExplicitNamespace = firstNS;
|
||||
if (OidIsValid(mySpecialNamespace))
|
||||
defaultCreationNamespace = mySpecialNamespace;
|
||||
else
|
||||
defaultCreationNamespace = (Oid) lfirsti(namespaceSearchPath);
|
||||
defaultCreationNamespace = firstNS;
|
||||
|
||||
/* Mark the path valid. */
|
||||
namespaceSearchPathValid = true;
|
||||
|
|
@ -1410,11 +1421,11 @@ recomputeNamespacePath(void)
|
|||
}
|
||||
|
||||
/*
|
||||
* GetTempTableNamespace
|
||||
* InitTempTableNamespace
|
||||
* Initialize temp table namespace on first use in a particular backend
|
||||
*/
|
||||
static Oid
|
||||
GetTempTableNamespace(void)
|
||||
static void
|
||||
InitTempTableNamespace(void)
|
||||
{
|
||||
char namespaceName[NAMEDATALEN];
|
||||
Oid namespaceId;
|
||||
|
|
@ -1463,11 +1474,50 @@ GetTempTableNamespace(void)
|
|||
}
|
||||
|
||||
/*
|
||||
* Register exit callback to clean out temp tables at backend shutdown.
|
||||
* Okay, we've prepared the temp namespace ... but it's not committed
|
||||
* yet, so all our work could be undone by transaction rollback. Set
|
||||
* flag for AtEOXact_Namespace to know what to do.
|
||||
*/
|
||||
on_shmem_exit(RemoveTempRelationsCallback, 0);
|
||||
myTempNamespace = namespaceId;
|
||||
|
||||
return namespaceId;
|
||||
firstTempTransaction = true;
|
||||
|
||||
namespaceSearchPathValid = false; /* need to rebuild list */
|
||||
}
|
||||
|
||||
/*
|
||||
* End-of-transaction cleanup for namespaces.
|
||||
*/
|
||||
void
|
||||
AtEOXact_Namespace(bool isCommit)
|
||||
{
|
||||
/*
|
||||
* If we abort the transaction in which a temp namespace was selected,
|
||||
* we'll have to do any creation or cleanout work over again. So,
|
||||
* just forget the namespace entirely until next time. On the other
|
||||
* hand, if we commit then register an exit callback to clean out the
|
||||
* temp tables at backend shutdown. (We only want to register the
|
||||
* callback once per session, so this is a good place to do it.)
|
||||
*/
|
||||
if (firstTempTransaction)
|
||||
{
|
||||
if (isCommit)
|
||||
on_shmem_exit(RemoveTempRelationsCallback, 0);
|
||||
else
|
||||
{
|
||||
myTempNamespace = InvalidOid;
|
||||
namespaceSearchPathValid = false; /* need to rebuild list */
|
||||
}
|
||||
firstTempTransaction = false;
|
||||
}
|
||||
/*
|
||||
* Clean up if someone failed to do PopSpecialNamespace
|
||||
*/
|
||||
if (OidIsValid(mySpecialNamespace))
|
||||
{
|
||||
mySpecialNamespace = InvalidOid;
|
||||
namespaceSearchPathValid = false; /* need to rebuild list */
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
|
|
@ -1816,8 +1866,8 @@ InitializeSearchPath(void)
|
|||
oldcxt = MemoryContextSwitchTo(TopMemoryContext);
|
||||
namespaceSearchPath = makeListi1(PG_CATALOG_NAMESPACE);
|
||||
MemoryContextSwitchTo(oldcxt);
|
||||
pathContainsSystemNamespace = true;
|
||||
defaultCreationNamespace = PG_CATALOG_NAMESPACE;
|
||||
firstExplicitNamespace = PG_CATALOG_NAMESPACE;
|
||||
namespaceSearchPathValid = true;
|
||||
namespaceUser = GetUserId();
|
||||
}
|
||||
|
|
@ -1849,11 +1899,24 @@ NamespaceCallback(Datum arg, Oid relid)
|
|||
/*
|
||||
* Fetch the active search path, expressed as a List of OIDs.
|
||||
*
|
||||
* The returned list includes the implicitly-prepended namespaces only if
|
||||
* includeImplicit is true.
|
||||
*
|
||||
* NB: caller must treat the list as read-only!
|
||||
*/
|
||||
List *
|
||||
fetch_search_path(void)
|
||||
fetch_search_path(bool includeImplicit)
|
||||
{
|
||||
List *result;
|
||||
|
||||
recomputeNamespacePath();
|
||||
return namespaceSearchPath;
|
||||
|
||||
result = namespaceSearchPath;
|
||||
if (!includeImplicit)
|
||||
{
|
||||
while (result && (Oid) lfirsti(result) != firstExplicitNamespace)
|
||||
result = lnext(result);
|
||||
}
|
||||
|
||||
return result;
|
||||
}
|
||||
|
|
|
|||
|
|
@ -8,13 +8,14 @@
|
|||
*
|
||||
*
|
||||
* IDENTIFICATION
|
||||
* $Header: /cvsroot/pgsql/src/backend/commands/schemacmds.c,v 1.2 2002/04/27 03:45:01 tgl Exp $
|
||||
* $Header: /cvsroot/pgsql/src/backend/commands/schemacmds.c,v 1.3 2002/05/17 20:53:33 tgl Exp $
|
||||
*
|
||||
*-------------------------------------------------------------------------
|
||||
*/
|
||||
#include "postgres.h"
|
||||
|
||||
#include "catalog/catalog.h"
|
||||
#include "catalog/namespace.h"
|
||||
#include "catalog/pg_namespace.h"
|
||||
#include "commands/schemacmds.h"
|
||||
#include "miscadmin.h"
|
||||
|
|
@ -32,6 +33,7 @@ CreateSchemaCommand(CreateSchemaStmt *stmt)
|
|||
{
|
||||
const char *schemaName = stmt->schemaname;
|
||||
const char *authId = stmt->authid;
|
||||
Oid namespaceId;
|
||||
List *parsetree_list;
|
||||
List *parsetree_item;
|
||||
const char *owner_name;
|
||||
|
|
@ -85,11 +87,18 @@ CreateSchemaCommand(CreateSchemaStmt *stmt)
|
|||
schemaName);
|
||||
|
||||
/* Create the schema's namespace */
|
||||
NamespaceCreate(schemaName, owner_userid);
|
||||
namespaceId = NamespaceCreate(schemaName, owner_userid);
|
||||
|
||||
/* Let commands in the schema-element-list know about the schema */
|
||||
/* Advance cmd counter to make the namespace visible */
|
||||
CommandCounterIncrement();
|
||||
|
||||
/*
|
||||
* Temporarily make the new namespace be the front of the search path,
|
||||
* as well as the default creation target namespace. This will be undone
|
||||
* at the end of this routine, or upon error.
|
||||
*/
|
||||
PushSpecialNamespace(namespaceId);
|
||||
|
||||
/*
|
||||
* Examine the list of commands embedded in the CREATE SCHEMA command,
|
||||
* and reorganize them into a sequentially executable order with no
|
||||
|
|
@ -124,6 +133,9 @@ CreateSchemaCommand(CreateSchemaStmt *stmt)
|
|||
}
|
||||
}
|
||||
|
||||
/* Reset search path to normal state */
|
||||
PopSpecialNamespace(namespaceId);
|
||||
|
||||
/* Reset current user */
|
||||
SetUserId(saved_userid);
|
||||
}
|
||||
|
|
|
|||
|
|
@ -12,7 +12,7 @@
|
|||
*
|
||||
*
|
||||
* IDENTIFICATION
|
||||
* $Header: /cvsroot/pgsql/src/backend/utils/adt/name.c,v 1.34 2002/04/26 01:24:08 tgl Exp $
|
||||
* $Header: /cvsroot/pgsql/src/backend/utils/adt/name.c,v 1.35 2002/05/17 20:53:33 tgl Exp $
|
||||
*
|
||||
*-------------------------------------------------------------------------
|
||||
*/
|
||||
|
|
@ -235,7 +235,7 @@ session_user(PG_FUNCTION_ARGS)
|
|||
Datum
|
||||
current_schema(PG_FUNCTION_ARGS)
|
||||
{
|
||||
List *search_path = fetch_search_path();
|
||||
List *search_path = fetch_search_path(false);
|
||||
char *nspname;
|
||||
|
||||
if (search_path == NIL)
|
||||
|
|
@ -247,7 +247,7 @@ current_schema(PG_FUNCTION_ARGS)
|
|||
Datum
|
||||
current_schemas(PG_FUNCTION_ARGS)
|
||||
{
|
||||
List *search_path = fetch_search_path();
|
||||
List *search_path = fetch_search_path(false);
|
||||
int nnames = length(search_path);
|
||||
Datum *names;
|
||||
int i;
|
||||
|
|
|
|||
|
|
@ -7,7 +7,7 @@
|
|||
* Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
|
||||
* Portions Copyright (c) 1994, Regents of the University of California
|
||||
*
|
||||
* $Id: namespace.h,v 1.13 2002/05/17 01:19:19 tgl Exp $
|
||||
* $Id: namespace.h,v 1.14 2002/05/17 20:53:33 tgl Exp $
|
||||
*
|
||||
*-------------------------------------------------------------------------
|
||||
*/
|
||||
|
|
@ -72,13 +72,19 @@ extern char *NameListToString(List *names);
|
|||
|
||||
extern bool isTempNamespace(Oid namespaceId);
|
||||
|
||||
extern void PushSpecialNamespace(Oid namespaceId);
|
||||
extern void PopSpecialNamespace(Oid namespaceId);
|
||||
|
||||
/* initialization & transaction cleanup code */
|
||||
extern void InitializeSearchPath(void);
|
||||
extern void AtEOXact_Namespace(bool isCommit);
|
||||
|
||||
/* stuff for search_path GUC variable */
|
||||
extern char *namespace_search_path;
|
||||
|
||||
extern const char *assign_search_path(const char *newval,
|
||||
bool doit, bool interactive);
|
||||
extern void InitializeSearchPath(void);
|
||||
|
||||
extern List *fetch_search_path(void);
|
||||
extern List *fetch_search_path(bool includeImplicit);
|
||||
|
||||
#endif /* NAMESPACE_H */
|
||||
|
|
|
|||
Loading…
Reference in New Issue