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EXPLAIN ANALYZE feature to measure and show actual runtimes and tuple

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counts alongside the planner's estimates.  By Martijn van Oosterhout,
with some further work by Tom Lane.
This commit is contained in:
Tom Lane
2001-09-18 01:59:07 +00:00
parent 27d2890b87
commit 89fa551808
18 changed files with 413 additions and 87 deletions
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12
src/backend/parser/gram.y
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@@ -11,7 +11,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/parser/gram.y,v 2.250 2001/09/06 04:57:28 ishii Exp $
* $Header: /cvsroot/pgsql/src/backend/parser/gram.y,v 2.251 2001/09/18 01:59:06 tgl Exp $
*
* HISTORY
* AUTHOR DATE MAJOR EVENT
@@ -3168,6 +3168,7 @@ opt_name_list: '(' name_list ')' { $$ = $2; }
*
* QUERY:
* EXPLAIN query
* EXPLAIN ANALYZE query
*
*****************************************************************************/
@@ -3175,9 +3176,18 @@ ExplainStmt: EXPLAIN opt_verbose OptimizableStmt
{
ExplainStmt *n = makeNode(ExplainStmt);
n->verbose = $2;
n->analyze = FALSE;
n->query = (Query*)$3;
$$ = (Node *)n;
}
| EXPLAIN analyze_keyword opt_verbose OptimizableStmt
{
ExplainStmt *n = makeNode(ExplainStmt);
n->verbose = $3;
n->analyze = TRUE;
n->query = (Query*)$4;
$$ = (Node *)n;
}
;