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Clean up BeginCommand and related routines. BeginCommand and EndCommand

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are now both invoked once per received SQL command (raw parsetree) from
pg_exec_query_string.  BeginCommand is actually just an empty routine
at the moment --- all its former operations have been pushed into tuple
receiver setup routines in printtup.c.  This makes for a clean distinction
between BeginCommand/EndCommand (once per command) and the tuple receiver
setup/teardown routines (once per ExecutorRun call), whereas the old code
was quite ad hoc.  Along the way, clean up the calling conventions for
ExecutorRun a little bit.
This commit is contained in:
Tom Lane
2002-02-27 19:36:13 +00:00
parent e22c9c4475
commit 6779c55c22
15 changed files with 266 additions and 361 deletions
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4
src/include/executor/executor.h
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@@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: executor.h,v 1.62 2002/02/19 20:11:19 tgl Exp $
* $Id: executor.h,v 1.63 2002/02/27 19:35:59 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -50,7 +50,7 @@ extern HeapTuple ExecRemoveJunk(JunkFilter *junkfilter, TupleTableSlot *slot);
*/
extern TupleDesc ExecutorStart(QueryDesc *queryDesc, EState *estate);
extern TupleTableSlot *ExecutorRun(QueryDesc *queryDesc, EState *estate,
int feature, long count);
ScanDirection direction, long count);
extern void ExecutorEnd(QueryDesc *queryDesc, EState *estate);
extern void ExecConstraints(char *caller, ResultRelInfo *resultRelInfo,
TupleTableSlot *slot, EState *estate);