init

pg_include/utils/relcache.h

@@ -0,0 +1,110 @@
+/*-------------------------------------------------------------------------
+ *
+ * relcache.h
+ *	  Relation descriptor cache definitions.
+ *
+ *
+ * Portions Copyright (c) 1996-2012, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ * src/include/utils/relcache.h
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef RELCACHE_H
+#define RELCACHE_H
+
+#include "access/tupdesc.h"
+#include "nodes/bitmapset.h"
+
+
+typedef struct RelationData *Relation;
+
+/* ----------------
+ *		RelationPtr is used in the executor to support index scans
+ *		where we have to keep track of several index relations in an
+ *		array.	-cim 9/10/89
+ * ----------------
+ */
+typedef Relation *RelationPtr;
+
+/*
+ * Routines to open (lookup) and close a relcache entry
+ */
+extern Relation RelationIdGetRelation(Oid relationId);
+extern void RelationClose(Relation relation);
+
+/*
+ * Routines to compute/retrieve additional cached information
+ */
+extern List *RelationGetIndexList(Relation relation);
+extern Oid	RelationGetOidIndex(Relation relation);
+extern List *RelationGetIndexExpressions(Relation relation);
+extern List *RelationGetIndexPredicate(Relation relation);
+extern Bitmapset *RelationGetIndexAttrBitmap(Relation relation);
+extern void RelationGetExclusionInfo(Relation indexRelation,
+						 Oid **operators,
+						 Oid **procs,
+						 uint16 **strategies);
+
+extern void RelationSetIndexList(Relation relation,
+					 List *indexIds, Oid oidIndex);
+
+extern void RelationInitIndexAccessInfo(Relation relation);
+
+/*
+ * Routines for backend startup
+ */
+extern void RelationCacheInitialize(void);
+extern void RelationCacheInitializePhase2(void);
+extern void RelationCacheInitializePhase3(void);
+
+/*
+ * Routine to create a relcache entry for an about-to-be-created relation
+ */
+extern Relation RelationBuildLocalRelation(const char *relname,
+						   Oid relnamespace,
+						   TupleDesc tupDesc,
+						   Oid relid,
+						   Oid relfilenode,
+						   Oid reltablespace,
+						   bool shared_relation,
+						   bool mapped_relation,
+						   char relpersistence);
+
+/*
+ * Routine to manage assignment of new relfilenode to a relation
+ */
+extern void RelationSetNewRelfilenode(Relation relation,
+						  TransactionId freezeXid);
+
+/*
+ * Routines for flushing/rebuilding relcache entries in various scenarios
+ */
+extern void RelationForgetRelation(Oid rid);
+
+extern void RelationCacheInvalidateEntry(Oid relationId);
+
+extern void RelationCacheInvalidate(void);
+
+extern void RelationCloseSmgrByOid(Oid relationId);
+
+extern void AtEOXact_RelationCache(bool isCommit);
+extern void AtEOSubXact_RelationCache(bool isCommit, SubTransactionId mySubid,
+						  SubTransactionId parentSubid);
+
+/*
+ * Routines to help manage rebuilding of relcache init files
+ */
+extern bool RelationIdIsInInitFile(Oid relationId);
+extern void RelationCacheInitFilePreInvalidate(void);
+extern void RelationCacheInitFilePostInvalidate(void);
+extern void RelationCacheInitFileRemove(void);
+
+/* should be used only by relcache.c and catcache.c */
+extern bool criticalRelcachesBuilt;
+
+/* should be used only by relcache.c and postinit.c */
+extern bool criticalSharedRelcachesBuilt;
+
+#endif   /* RELCACHE_H */