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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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3
src/backend/nodes/copyfuncs.c
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@ -15,7 +15,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/nodes/copyfuncs.c,v 1.378 2007/06/11 01:16:22 tgl Exp $
* $PostgreSQL: pgsql/src/backend/nodes/copyfuncs.c,v 1.379 2007/06/11 22:22:40 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -1309,6 +1309,7 @@ _copyCurrentOfExpr(CurrentOfExpr *from)
COPY_SCALAR_FIELD(cvarno);
COPY_STRING_FIELD(cursor_name);
COPY_SCALAR_FIELD(cursor_param);
return newnode;
}