database/postgres
database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-04-22 23:02:54 +03:00
Code

Optimize SP-GiST insertions.

Browse Source 
This includes two micro-optimizations to the tight inner loop in descending
the SP-GiST tree: 1. avoid an extra function call to index_getprocinfo when
calling user-defined choose function, and 2. avoid a useless palloc+pfree
when node labels are not used.
This commit is contained in:
Heikki Linnakangas 2012-08-29 09:14:08 +03:00
parent 9df55c8c3f
commit c82dedb7a8
2 changed files with 27 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
src/backend/access/spgist/spgdoinsert.c
View File

@ -1861,6 +1861,14 @@ spgdoinsert(Relation index, SpGistState *state,
int leafSize;
SPPageDesc current,
parent;
FmgrInfo *procinfo = NULL;
/*
* Look up FmgrInfo of the user-defined choose function once, to save
* cycles in the loop below.
*/
if (!isnull)
procinfo = index_getprocinfo(index, 1, SPGIST_CHOOSE_PROC);
/*
* Since we don't use index_form_tuple in this AM, we have to make sure
@ -2007,7 +2015,6 @@ spgdoinsert(Relation index, SpGistState *state,
SpGistInnerTuple innerTuple;
spgChooseIn in;
spgChooseOut out;
FmgrInfo *procinfo;
/*
* spgAddNode and spgSplitTuple cases will loop back to here to
@ -2035,7 +2042,6 @@ spgdoinsert(Relation index, SpGistState *state,
if (!isnull)
{
/* use user-defined choose method */
procinfo = index_getprocinfo(index, 1, SPGIST_CHOOSE_PROC);
FunctionCall2Coll(procinfo,
index->rd_indcollation[0],
PointerGetDatum(&in),

27
src/backend/access/spgist/spgutils.c
View File

@ -743,28 +743,33 @@ Datum *
spgExtractNodeLabels(SpGistState *state, SpGistInnerTuple innerTuple)
{
Datum *nodeLabels;
int nullcount = 0;
int i;
SpGistNodeTuple node;
/* Either all the labels must be NULL, or none. */
node = SGITNODEPTR(innerTuple);
if (IndexTupleHasNulls(node))
{
SGITITERATE(innerTuple, i, node)
{
if (!IndexTupleHasNulls(node))
elog(ERROR, "some but not all node labels are null in SPGiST inner tuple");
}
/* They're all null, so just return NULL */
return NULL;
}
else
{
nodeLabels = (Datum *) palloc(sizeof(Datum) * innerTuple->nNodes);
SGITITERATE(innerTuple, i, node)
{
if (IndexTupleHasNulls(node))
nullcount++;
else
elog(ERROR, "some but not all node labels are null in SPGiST inner tuple");
nodeLabels[i] = SGNTDATUM(node, state);
}
if (nullcount == innerTuple->nNodes)
{
/* They're all null, so just return NULL */
pfree(nodeLabels);
return NULL;
}
if (nullcount != 0)
elog(ERROR, "some but not all node labels are null in SPGiST inner tuple");
return nodeLabels;
}
}
/*
* Add a new item to the page, replacing a PLACEHOLDER item if possible.