diff options
| author | Alvaro Herrera <alvherre@alvh.no-ip.org> | 2015-05-07 13:02:22 -0300 |
|---|---|---|
| committer | Alvaro Herrera <alvherre@alvh.no-ip.org> | 2015-05-07 13:02:22 -0300 |
| commit | db5f98ab4fa44bc563ec62d7b1aada4fc276d9b2 (patch) | |
| tree | 0b05cf901eed7ffab21935a5f6491e8215bbe670 /doc/src | |
| parent | 7be47c56af3d3013955c91c2877c08f2a0e3e6a2 (diff) | |
Improve BRIN infra, minmax opclass and regression test
The minmax opclass was using the wrong support functions when
cross-datatypes queries were run. Instead of trying to fix the
pg_amproc definitions (which apparently is not possible), use the
already correct pg_amop entries instead. This requires jumping through
more hoops (read: extra syscache lookups) to obtain the underlying
functions to execute, but it is necessary for correctness.
Author: Emre Hasegeli, tweaked by Álvaro
Review: Andreas Karlsson
Also change BrinOpcInfo to record each stored type's typecache entry
instead of just the OID. Turns out that the full type cache is
necessary in brin_deform_tuple: the original code used the indexed
type's byval and typlen properties to extract the stored tuple, which is
correct in Minmax; but in other implementations that want to store
something different, that's wrong. The realization that this is a bug
comes from Emre also, but I did not use his patch.
I also adopted Emre's regression test code (with smallish changes),
which is more complete.
Diffstat (limited to 'doc/src')
| -rw-r--r-- | doc/src/sgml/brin.sgml | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/doc/src/sgml/brin.sgml b/doc/src/sgml/brin.sgml index 1ac282c57a6..92dac7c60b5 100644 --- a/doc/src/sgml/brin.sgml +++ b/doc/src/sgml/brin.sgml @@ -428,8 +428,8 @@ typedef struct BrinOpcInfo /* Opaque pointer for the opclass' private use */ void *oi_opaque; - /* Type IDs of the stored columns */ - Oid oi_typids[FLEXIBLE_ARRAY_MEMBER]; + /* Type cache entries of the stored columns */ + TypeCacheEntry *oi_typcache[FLEXIBLE_ARRAY_MEMBER]; } BrinOpcInfo; </programlisting> <structname>BrinOpcInfo</>.<structfield>oi_opaque</> can be used by the |