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Make EXPLAIN show the function call expression of a FunctionScan plan node, 

but only in VERBOSE mode.  Per discussion.
This commit is contained in:
Tom Lane 2010-08-24 21:20:36 +00:00
parent 5c788e7cf5
commit 99ee43c57b
1 changed files with 36 additions and 14 deletions
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50
src/backend/commands/explain.c
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@ -7,7 +7,7 @@
* Portions Copyright (c) 1994-5, Regents of the University of California
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/commands/explain.c,v 1.207 2010/07/13 20:57:19 tgl Exp $
* $PostgreSQL: pgsql/src/backend/commands/explain.c,v 1.208 2010/08/24 21:20:36 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -59,6 +59,9 @@ static void ExplainNode(PlanState *planstate, List *ancestors,
ExplainState *es);
static void show_plan_tlist(PlanState *planstate, List *ancestors,
ExplainState *es);
static void show_expression(Node *node, const char *qlabel,
PlanState *planstate, List *ancestors,
bool useprefix, ExplainState *es);
static void show_qual(List *qual, const char *qlabel,
PlanState *planstate, List *ancestors,
bool useprefix, ExplainState *es);
@ -1017,13 +1020,19 @@ ExplainNode(PlanState *planstate, List *ancestors,
"Recheck Cond", planstate, ancestors, es);
/* FALL THRU */
case T_SeqScan:
case T_FunctionScan:
case T_ValuesScan:
case T_CteScan:
case T_WorkTableScan:
case T_SubqueryScan:
show_scan_qual(plan->qual, "Filter", planstate, ancestors, es);
break;
case T_FunctionScan:
if (es->verbose)
show_expression(((FunctionScan *) plan)->funcexpr,
"Function Call", planstate, ancestors,
es->verbose, es);
show_scan_qual(plan->qual, "Filter", planstate, ancestors, es);
break;
case T_TidScan:
{
/*
@ -1282,24 +1291,16 @@ show_plan_tlist(PlanState *planstate, List *ancestors, ExplainState *es)
}
/*
* Show a qualifier expression
* Show a generic expression
*/
static void
show_qual(List *qual, const char *qlabel,
PlanState *planstate, List *ancestors,
bool useprefix, ExplainState *es)
show_expression(Node *node, const char *qlabel,
PlanState *planstate, List *ancestors,
bool useprefix, ExplainState *es)
{
List *context;
Node *node;
char *exprstr;
/* No work if empty qual */
if (qual == NIL)
return;
/* Convert AND list to explicit AND */
node = (Node *) make_ands_explicit(qual);
/* Set up deparsing context */
context = deparse_context_for_planstate((Node *) planstate,
ancestors,
@ -1312,6 +1313,27 @@ show_qual(List *qual, const char *qlabel,
ExplainPropertyText(qlabel, exprstr, es);
}
/*
* Show a qualifier expression (which is a List with implicit AND semantics)
*/
static void
show_qual(List *qual, const char *qlabel,
PlanState *planstate, List *ancestors,
bool useprefix, ExplainState *es)
{
Node *node;
/* No work if empty qual */
if (qual == NIL)
return;
/* Convert AND list to explicit AND */
node = (Node *) make_ands_explicit(qual);
/* And show it */
show_expression(node, qlabel, planstate, ancestors, useprefix, es);
}
/*
* Show a qualifier expression for a scan plan node
*/