diff options
| author | Peter Eisentraut <peter@eisentraut.org> | 2025-02-27 17:03:31 +0100 |
|---|---|---|
| committer | Peter Eisentraut <peter@eisentraut.org> | 2025-02-27 17:03:31 +0100 |
| commit | ce62f2f2a0a48d021f250ba84dfcab5d45ddc914 (patch) | |
| tree | dd73a4a521f961961ce8c991363b3425e9e4741d /src/include/access/amapi.h | |
| parent | 6eb8a1a4f90c542d7ce9dcc381528fcb81390ab9 (diff) | |
Generalize hash and ordering support in amapi
Stop comparing access method OID values against HASH_AM_OID and
BTREE_AM_OID, and instead check the IndexAmRoutine for an index to see
if it advertises its ability to perform the necessary ordering,
hashing, or cross-type comparing functionality. A field amcanorder
already existed, this uses it more widely. Fields amcanhash and
amcancrosscompare are added for the other purposes.
Author: Mark Dilger <mark.dilger@enterprisedb.com>
Discussion: https://www.postgresql.org/message-id/flat/E72EAA49-354D-4C2E-8EB9-255197F55330@enterprisedb.com
Diffstat (limited to 'src/include/access/amapi.h')
| -rw-r--r-- | src/include/access/amapi.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/src/include/access/amapi.h b/src/include/access/amapi.h index fbe6b225ec9..bf729a1e4ae 100644 --- a/src/include/access/amapi.h +++ b/src/include/access/amapi.h @@ -243,6 +243,10 @@ typedef struct IndexAmRoutine bool amcanorder; /* does AM support ORDER BY result of an operator on indexed column? */ bool amcanorderbyop; + /* does AM support hashing using API consistent with the hash AM? */ + bool amcanhash; + /* does AM support cross-type comparisons? */ + bool amcancrosscompare; /* does AM support backward scanning? */ bool amcanbackward; /* does AM support UNIQUE indexes? */ |