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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/backend/access/common/tupdesc.c
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@@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/access/common/tupdesc.c,v 1.76 2001/10/25 05:49:20 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/access/common/tupdesc.c,v 1.77 2002/02/27 19:34:11 tgl Exp $
*
* NOTES
* some of the executor utility code such as "ExecTypeFromTL" should be
@@ -432,7 +432,7 @@ TupleDescInitEntry(TupleDesc desc,
*
* (Why not just make the atttypid point to the OID type, instead of the
* type the query returns? Because the executor uses the atttypid to
* tell the front end what type will be returned (in BeginCommand),
* tell the front end what type will be returned,
* and in the end the type returned will be the result of the query,
* not an OID.)
*