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| author | Heikki Linnakangas <heikki.linnakangas@iki.fi> | 2015-03-27 23:35:16 +0200 |
|---|---|---|
| committer | Heikki Linnakangas <heikki.linnakangas@iki.fi> | 2015-03-27 23:35:16 +0200 |
| commit | e09b48316c22fce727bce3c89fa64fc627787e6a (patch) | |
| tree | 107a22f368efd340c6f545f0e6b7130b5063aa08 /contrib/btree_gist/btree_utils_var.c | |
| parent | 735cd6128a6a401671126443a9af4324932a38d6 (diff) | |
| download | postgresql-e09b48316c22fce727bce3c89fa64fc627787e6a.tar.gz postgresql-e09b48316c22fce727bce3c89fa64fc627787e6a.zip | |
Add index-only scan support to btree_gist.
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.
Diffstat (limited to 'contrib/btree_gist/btree_utils_var.c')
| -rw-r--r-- | contrib/btree_gist/btree_utils_var.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/contrib/btree_gist/btree_utils_var.c b/contrib/btree_gist/btree_utils_var.c index e664211198e..78e8662addd 100644 --- a/contrib/btree_gist/btree_utils_var.c +++ b/contrib/btree_gist/btree_utils_var.c @@ -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) |