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Added support for index-only scans to HNSW

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This commit is contained in:
Andrew Kane
2023-09-02 18:54:46 -07:00
parent 034d4acaea
commit 0a3669a680
4 changed files with 28 additions and 7 deletions
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11
src/hnsw.c
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@@ -155,6 +155,15 @@ hnswvalidate(Oid opclassoid)
return true;
}
/*
* Checks if index-only scan is supported
*/
static bool
hnswcanreturn(Relation indexRelation, int attno)
{
return attno == 1 && HnswOptionalProcInfo(indexRelation, HNSW_NORM_PROC) == NULL;
}
/*
* Define index handler
*
@@ -196,7 +205,7 @@ hnswhandler(PG_FUNCTION_ARGS)
amroutine->aminsert = hnswinsert;
amroutine->ambulkdelete = hnswbulkdelete;
amroutine->amvacuumcleanup = hnswvacuumcleanup;
amroutine->amcanreturn = NULL;
amroutine->amcanreturn = hnswcanreturn;
amroutine->amcostestimate = hnswcostestimate;
amroutine->amoptions = hnswoptions;
amroutine->amproperty = NULL; /* TODO AMPROP_DISTANCE_ORDERABLE */