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Simplify ParamListInfo data structure to support only numbered parameters,

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not named ones, and replace linear searches of the list with array indexing.
The named-parameter support has been dead code for many years anyway,
and recent profiling suggests that the searching was costing a noticeable
amount of performance for complex queries.
This commit is contained in:
Tom Lane
2006-04-22 01:26:01 +00:00
parent 0606860a20
commit 2206b498d8
20 changed files with 214 additions and 335 deletions
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18
src/backend/nodes/equalfuncs.c
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@@ -18,7 +18,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/nodes/equalfuncs.c,v 1.269 2006/04/15 17:45:34 tgl Exp $
* $PostgreSQL: pgsql/src/backend/nodes/equalfuncs.c,v 1.270 2006/04/22 01:25:59 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -147,23 +147,9 @@ static bool
_equalParam(Param *a, Param *b)
{
COMPARE_SCALAR_FIELD(paramkind);
COMPARE_SCALAR_FIELD(paramid);
COMPARE_SCALAR_FIELD(paramtype);
switch (a->paramkind)
{
case PARAM_NAMED:
COMPARE_STRING_FIELD(paramname);
break;
case PARAM_NUM:
case PARAM_EXEC:
case PARAM_SUBLINK:
COMPARE_SCALAR_FIELD(paramid);
break;
default:
elog(ERROR, "unrecognized paramkind: %d",
a->paramkind);
}
return true;
}