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Create a new 'MultiExecProcNode' call API for plan nodes that don't

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return just a single tuple at a time.  Currently the only such node
type is Hash, but I expect we will soon have indexscans that can return
tuple bitmaps.  A side benefit is that EXPLAIN ANALYZE now shows the
correct tuple count for a Hash node.
This commit is contained in:
Tom Lane
2005-04-16 20:07:35 +00:00
parent 85eee28cec
commit d8b1bf4791
9 changed files with 121 additions and 39 deletions
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38
src/backend/executor/instrument.c
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@ -7,7 +7,7 @@
* Copyright (c) 2001-2005, PostgreSQL Global Development Group
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/executor/instrument.c,v 1.11 2005/03/25 21:57:58 tgl Exp $
* $PostgreSQL: pgsql/src/backend/executor/instrument.c,v 1.12 2005/04/16 20:07:35 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -33,13 +33,10 @@ InstrAlloc(int n)
void
InstrStartNode(Instrumentation *instr)
{
if (!instr)
return;
if (!INSTR_TIME_IS_ZERO(instr->starttime))
elog(DEBUG2, "InstrStartNode called twice in a row");
else
if (INSTR_TIME_IS_ZERO(instr->starttime))
INSTR_TIME_SET_CURRENT(instr->starttime);
else
elog(DEBUG2, "InstrStartNode called twice in a row");
}
/* Exit from a plan node */
@ -48,12 +45,13 @@ InstrStopNode(Instrumentation *instr, bool returnedTuple)
{
instr_time endtime;
if (!instr)
return;
/* count the returned tuples */
if (returnedTuple)
instr->tuplecount += 1;
if (INSTR_TIME_IS_ZERO(instr->starttime))
{
elog(DEBUG2, "InstrStopNode without start");
elog(DEBUG2, "InstrStopNode called without start");
return;
}
@ -86,9 +84,17 @@ InstrStopNode(Instrumentation *instr, bool returnedTuple)
instr->running = true;
instr->firsttuple = INSTR_TIME_GET_DOUBLE(instr->counter);
}
}
if (returnedTuple)
instr->tuplecount += 1;
/* As above, but count multiple tuples returned at once */
void
InstrStopNodeMulti(Instrumentation *instr, double nTuples)
{
/* count the returned tuples */
instr->tuplecount += nTuples;
/* delegate the rest */
InstrStopNode(instr, false);
}
/* Finish a run cycle for a plan node */
@ -97,14 +103,14 @@ InstrEndLoop(Instrumentation *instr)
{
double totaltime;
if (!instr)
return;
/* Skip if nothing has happened, or already shut down */
if (!instr->running)
return;
/* Accumulate statistics */
if (!INSTR_TIME_IS_ZERO(instr->starttime))
elog(DEBUG2, "InstrEndLoop called on running node");
/* Accumulate per-cycle statistics into totals */
totaltime = INSTR_TIME_GET_DOUBLE(instr->counter);
instr->startup += instr->firsttuple;