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Another round of planner/optimizer work. This is just restructuring and

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code cleanup; no major improvements yet.  However, EXPLAIN does produce
more intuitive outputs for nested loops with indexscans now...
This commit is contained in:
Tom Lane
2000-01-09 00:26:47 +00:00
parent 69d4299e3e
commit 166b5c1def
35 changed files with 1239 additions and 1448 deletions
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14
src/backend/executor/nodeHash.c
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@ -6,7 +6,7 @@
* Copyright (c) 1994, Regents of the University of California
*
*
* $Id: nodeHash.c,v 1.41 1999/12/16 22:19:44 wieck Exp $
* $Id: nodeHash.c,v 1.42 2000/01/09 00:26:18 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -227,7 +227,7 @@ HashJoinTable
ExecHashTableCreate(Hash *node)
{
Plan *outerNode;
int ntuples;
double ntuples;
int tupsize;
double inner_rel_bytes;
double hash_table_bytes;
@ -250,9 +250,9 @@ ExecHashTableCreate(Hash *node)
* ----------------
*/
outerNode = outerPlan(node);
ntuples = outerNode->plan_size;
if (ntuples <= 0) /* force a plausible size if no info */
ntuples = 1000;
ntuples = outerNode->plan_rows;
if (ntuples <= 0.0) /* force a plausible size if no info */
ntuples = 1000.0;
/*
* estimate tupsize based on footprint of tuple in hashtable... but
@ -260,7 +260,7 @@ ExecHashTableCreate(Hash *node)
*/
tupsize = MAXALIGN(outerNode->plan_width) +
MAXALIGN(sizeof(HashJoinTupleData));
inner_rel_bytes = (double) ntuples *tupsize * FUDGE_FAC;
inner_rel_bytes = ntuples * tupsize * FUDGE_FAC;
/*
* Target hashtable size is SortMem kilobytes, but not less than
@ -276,7 +276,7 @@ ExecHashTableCreate(Hash *node)
* for an average bucket load of NTUP_PER_BUCKET (per virtual
* bucket!).
*/
totalbuckets = (int) ceil((double) ntuples * FUDGE_FAC / NTUP_PER_BUCKET);
totalbuckets = (int) ceil(ntuples * FUDGE_FAC / NTUP_PER_BUCKET);
/*
* Count the number of buckets we think will actually fit in the