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2206b498d8
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.
63 lines
1.5 KiB
C
63 lines
1.5 KiB
C
/*-------------------------------------------------------------------------
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*
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* params.c
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* Support for finding the values associated with Param nodes.
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*
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*
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* Portions Copyright (c) 1996-2006, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* IDENTIFICATION
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* $PostgreSQL: pgsql/src/backend/nodes/params.c,v 1.6 2006/04/22 01:25:59 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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#include "postgres.h"
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#include "nodes/params.h"
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#include "utils/datum.h"
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#include "utils/lsyscache.h"
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/*
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* Copy a ParamListInfo structure.
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*
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* The result is allocated in CurrentMemoryContext.
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*/
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ParamListInfo
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copyParamList(ParamListInfo from)
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{
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ParamListInfo retval;
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Size size;
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int i;
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if (from == NULL || from->numParams <= 0)
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return NULL;
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/* sizeof(ParamListInfoData) includes the first array element */
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size = sizeof(ParamListInfoData) +
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(from->numParams - 1) * sizeof(ParamExternData);
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retval = (ParamListInfo) palloc(size);
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memcpy(retval, from, size);
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/*
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* Flat-copy is not good enough for pass-by-ref data values, so make
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* a pass over the array to copy those.
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*/
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for (i = 0; i < retval->numParams; i++)
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{
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ParamExternData *prm = &retval->params[i];
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int16 typLen;
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bool typByVal;
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if (prm->isnull || !OidIsValid(prm->ptype))
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continue;
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get_typlenbyval(prm->ptype, &typLen, &typByVal);
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prm->value = datumCopy(prm->value, typByVal, typLen);
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}
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return retval;
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}
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