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Invent ResourceOwner mechanism as per my recent proposal, and use it to

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keep track of portal-related resources separately from transaction-related
resources.  This allows cursors to work in a somewhat sane fashion with
nested transactions.  For now, cursor behavior is non-subtransactional,
that is a cursor's state does not roll back if you abort a subtransaction
that fetched from the cursor.  We might want to change that later.
This commit is contained in:
Tom Lane
2004-07-17 03:32:14 +00:00
parent f4c069ca8f
commit fe548629c5
41 changed files with 2086 additions and 1192 deletions
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10
src/include/utils/catcache.h
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@@ -13,7 +13,7 @@
* Portions Copyright (c) 1996-2003, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/utils/catcache.h,v 1.49 2004/07/01 00:51:44 tgl Exp $
* $PostgreSQL: pgsql/src/include/utils/catcache.h,v 1.50 2004/07/17 03:31:47 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -101,9 +101,6 @@ typedef struct catctup
* and negative entries is identical.
*/
int refcount; /* number of active references */
int *prev_refcount; /* refcounts for upper subtransactions */
int numpushes; /* number of used refcounts in the array */
int numalloc; /* allocated size of array */
bool dead; /* dead but not yet removed? */
bool negative; /* negative cache entry? */
uint32 hash_value; /* hash value for this tuple's keys */
@@ -142,9 +139,6 @@ typedef struct catclist
*/
Dlelem cache_elem; /* list member of per-catcache list */
int refcount; /* number of active references */
int *prev_refcount; /* refcounts for upper subtransactions */
int numpushes; /* number of used refcounts in the array */
int numalloc; /* allocated size of array */
bool dead; /* dead but not yet removed? */
bool ordered; /* members listed in index order? */
short nkeys; /* number of lookup keys specified */
@@ -169,8 +163,6 @@ extern DLLIMPORT MemoryContext CacheMemoryContext;
extern void CreateCacheMemoryContext(void);
extern void AtEOXact_CatCache(bool isCommit);
extern void AtSubStart_CatCache(void);
extern void AtEOSubXact_CatCache(bool isCommit);
extern CatCache *InitCatCache(int id, const char *relname, const char *indname,
int reloidattr,