database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-06-26 12:21:12 +03:00
Code Activity

Support UPDATE/DELETE WHERE CURRENT OF cursor_name, per SQL standard.

Browse Source 
Along the way, allow FOR UPDATE in non-WITH-HOLD cursors; there may once
have been a reason to disallow that, but it seems to work now, and it's
really rather necessary if you want to select a row via a cursor and then
update it in a concurrent-safe fashion.

Original patch by Arul Shaji, rather heavily editorialized by Tom Lane.
This commit is contained in:
Tom Lane
2007-06-11 01:16:30 +00:00
parent 85d72f0516
commit 6808f1b1de
30 changed files with 940 additions and 127 deletions
Download Patch File Download Diff File Expand all files Collapse all files

9
src/include/executor/executor.h
View File

@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2007, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/executor/executor.h,v 1.139 2007/02/27 01:11:25 tgl Exp $
* $PostgreSQL: pgsql/src/include/executor/executor.h,v 1.140 2007/06/11 01:16:30 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -70,6 +70,12 @@ extern bool ExecSupportsMarkRestore(NodeTag plantype);
extern bool ExecSupportsBackwardScan(Plan *node);
extern bool ExecMayReturnRawTuples(PlanState *node);
/*
* prototypes from functions in execCurrent.c
*/
extern bool execCurrentOf(char *cursor_name, Oid table_oid,
ItemPointer current_tid);
/*
* prototypes from functions in execGrouping.c
*/
@ -135,6 +141,7 @@ extern void ExecConstraints(ResultRelInfo *resultRelInfo,
TupleTableSlot *slot, EState *estate);
extern TupleTableSlot *EvalPlanQual(EState *estate, Index rti,
ItemPointer tid, TransactionId priorXmax, CommandId curCid);
extern PlanState *ExecGetActivePlanTree(QueryDesc *queryDesc);
extern DestReceiver *CreateIntoRelDestReceiver(void);
/*