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Improve UPDATE/DELETE WHERE CURRENT OF so that they can be used from plpgsql

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with a plpgsql-defined cursor.  The underlying mechanism for this is that the
main SQL engine will now take "WHERE CURRENT OF $n" where $n is a refcursor
parameter.  Not sure if we should document that fact or consider it an
implementation detail.  Per discussion with Pavel Stehule.
This commit is contained in:
Tom Lane
2007-06-11 22:22:42 +00:00
parent bdc71c2cb1
commit a9545b3aef
13 changed files with 225 additions and 72 deletions
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6
src/include/executor/executor.h
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@ -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 1.140 2007/06/11 01:16:30 tgl Exp $
* $PostgreSQL: pgsql/src/include/executor/executor.h,v 1.141 2007/06/11 22:22:42 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -73,7 +73,9 @@ extern bool ExecMayReturnRawTuples(PlanState *node);
/*
* prototypes from functions in execCurrent.c
*/
extern bool execCurrentOf(char *cursor_name, Oid table_oid,
extern bool execCurrentOf(CurrentOfExpr *cexpr,
ExprContext *econtext,
Oid table_oid,
ItemPointer current_tid);
/*