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As Niel so nicely pointed out this morning, the output of EXPLAIN

Browse Source 
ANALYZE is not quite clear when branches of the query are never
executed. So this tiny patch fixes that.

The patch is attached and can also be found at:
http://svana.org/kleptog/pgsql/pgsql-explain.patch

Martijn van Oosterhout
This commit is contained in:
Bruce Momjian 2002-10-14 04:26:54 +00:00
parent 1f653ec31e
commit ac376a3eb9
1 changed files with 7 additions and 1 deletions
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8
src/backend/commands/explain.c
View File

@ -5,7 +5,7 @@
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
* Portions Copyright (c) 1994-5, Regents of the University of California
*
* $Header: /cvsroot/pgsql/src/backend/commands/explain.c,v 1.88 2002/09/19 22:48:33 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/commands/explain.c,v 1.89 2002/10/14 04:26:54 momjian Exp $
*
*/
@ -35,6 +35,7 @@ typedef struct ExplainState
/* options */
bool printCost; /* print cost */
bool printNodes; /* do nodeToString() instead */
bool printAnalyze; /* print actual times */
/* other states */
List *rtable; /* range table */
} ExplainState;
@ -405,6 +406,11 @@ explain_outNode(StringInfo str, Plan *plan, Plan *outer_plan,
1000.0 * plan->instrument->total / nloops,
plan->instrument->ntuples / nloops,
plan->instrument->nloops);
es->printAnalyze = true;
}
else if( es->printAnalyze )
{
appendStringInfo(str, " (never executed)");
}
}
appendStringInfo(str, "\n");