diff options
Diffstat (limited to 'contrib/btree_gist/btree_utils_num.c')
| -rw-r--r-- | contrib/btree_gist/btree_utils_num.c | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/contrib/btree_gist/btree_utils_num.c b/contrib/btree_gist/btree_utils_num.c index 86a7f486f9f..5bfe659f917 100644 --- a/contrib/btree_gist/btree_utils_num.c +++ b/contrib/btree_gist/btree_utils_num.c @@ -93,6 +93,64 @@ gbt_num_compress(GISTENTRY *entry, const gbtree_ninfo *tinfo) return retval; } +/* + * Convert a compressed leaf item back to the original type, for index-only + * scans. + */ +GISTENTRY * +gbt_num_fetch(GISTENTRY *entry, const gbtree_ninfo *tinfo) +{ + GISTENTRY *retval; + Datum datum; + + Assert(tinfo->indexsize >= 2 * tinfo->size); + + /* + * Get the original Datum from the stored datum. On leaf entries, the + * lower and upper bound are the same. We just grab the lower bound and + * return it. + */ + switch (tinfo->t) + { + case gbt_t_int2: + datum = Int16GetDatum(*(int16 *) entry->key); + break; + case gbt_t_int4: + datum = Int32GetDatum(*(int32 *) entry->key); + break; + case gbt_t_int8: + datum = Int64GetDatum(*(int64 *) entry->key); + break; + case gbt_t_oid: + datum = ObjectIdGetDatum(*(Oid *) entry->key); + break; + case gbt_t_float4: + datum = Float4GetDatum(*(float4 *) entry->key); + break; + case gbt_t_float8: + datum = Float8GetDatum(*(float8 *) entry->key); + break; + case gbt_t_date: + datum = DateADTGetDatum(*(DateADT *) entry->key); + break; + case gbt_t_time: + datum = TimeADTGetDatum(*(TimeADT *) entry->key); + break; + case gbt_t_ts: + datum = TimestampGetDatum(*(Timestamp *) entry->key); + break; + case gbt_t_cash: + datum = CashGetDatum(*(Cash *) entry->key); + break; + default: + datum = PointerGetDatum(entry->key); + } + + retval = palloc(sizeof(GISTENTRY)); + gistentryinit(*retval, datum, entry->rel, entry->page, entry->offset, + FALSE); + return retval; +} |