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

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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
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4
src/backend/executor/Makefile
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@@ -4,7 +4,7 @@
# Makefile for executor
#
# IDENTIFICATION
# $PostgreSQL: pgsql/src/backend/executor/Makefile,v 1.25 2007/01/20 17:16:11 petere Exp $
# $PostgreSQL: pgsql/src/backend/executor/Makefile,v 1.26 2007/06/11 01:16:22 tgl Exp $
#
#-------------------------------------------------------------------------
@@ -12,7 +12,7 @@ subdir = src/backend/executor
top_builddir = ../../..
include $(top_builddir)/src/Makefile.global
OBJS = execAmi.o execGrouping.o execJunk.o execMain.o \
OBJS = execAmi.o execCurrent.o execGrouping.o execJunk.o execMain.o \
execProcnode.o execQual.o execScan.o execTuples.o \
execUtils.o functions.o instrument.o nodeAppend.o nodeAgg.o \
nodeBitmapAnd.o nodeBitmapOr.o \