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Add index-only scan support to btree_gist.

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inet, cidr, and timetz indexes still cannot support index-only scans,
because they don't store the original unmodified value in the index, but a
derived approximate value.
This commit is contained in:
Heikki Linnakangas
2015-03-27 23:35:16 +02:00
parent 735cd6128a
commit e09b48316c
46 changed files with 614 additions and 51 deletions
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18
contrib/btree_gist/btree_utils_var.c
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@ -29,6 +29,7 @@ typedef struct
PG_FUNCTION_INFO_V1(gbt_var_decompress);
PG_FUNCTION_INFO_V1(gbt_var_fetch);
Datum
@ -301,6 +302,23 @@ gbt_var_compress(GISTENTRY *entry, const gbtree_vinfo *tinfo)
}
Datum
gbt_var_fetch(PG_FUNCTION_ARGS)
{
GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
GBT_VARKEY *key = (GBT_VARKEY *) DatumGetPointer(PG_DETOAST_DATUM(entry->key));
GBT_VARKEY_R r = gbt_var_key_readable(key);
GISTENTRY *retval;
retval = palloc(sizeof(GISTENTRY));
gistentryinit(*retval, PointerGetDatum(r.lower),
entry->rel, entry->page,
entry->offset, TRUE);
PG_RETURN_POINTER(retval);
}
GBT_VARKEY *
gbt_var_union(const GistEntryVector *entryvec, int32 *size, Oid collation,
const gbtree_vinfo *tinfo)