postgres

Commit Graph

Author	SHA1	Message	Date
Tom Lane	ff720a597c	Fix planner to consider matches to boolean columns in extension indexes. The planner has to special-case indexes on boolean columns, because what we need for an indexscan on such a column is a qual of the shape of "boolvar = pseudoconstant". For plain bool constants, previous simplification will have reduced this to "boolvar" or "NOT boolvar", and we have to reverse that if we want to make an indexqual. There is existing code to do so, but it only fires when the index's opfamily is BOOL_BTREE_FAM_OID or BOOL_HASH_FAM_OID. Thus extension AMs, or extension opclasses such as contrib/btree_gin, are out in the cold. The reason for hard-wiring the set of relevant opfamilies was mostly to avoid a catalog lookup in a hot code path. We can improve matters while not taking much of a performance hit by relying on the hard-wired set when the opfamily OID is visibly built-in, and only checking the catalogs when dealing with an extension opfamily. While here, rename IsBooleanOpfamily to IsBuiltinBooleanOpfamily to remind future users of that macro of its limitations. At some point we might want to make indxpath.c's improved version of the test globally accessible, but it's not presently needed elsewhere. Zongliang Quan and Tom Lane Discussion: https://postgr.es/m/f293b91d-1d46-d386-b6bb-4b06ff5c667b@yeah.net	3 years ago
Tomas Vondra	57e3c5160b	Add bool GiST opclass to btree_gist Adds bool opclass to btree_gist extension, to allow creating GiST indexes on bool columns. GiST indexes on a single bool column don't seem particularly useful, but this allows defining exclusion constraings involving a bool column, for example. Author: Emre Hasegeli Reviewed-by: Andrey Borodin Discussion: https://postgr.es/m/CAE2gYzyDKJBZngssR84VGZEN=Ux=V9FV23QfPgo+7-yYnKKg4g@mail.gmail.com	4 years ago

Author

SHA1

Message

Date

Tom Lane

ff720a597c

Fix planner to consider matches to boolean columns in extension indexes.

The planner has to special-case indexes on boolean columns, because
what we need for an indexscan on such a column is a qual of the shape
of "boolvar = pseudoconstant".  For plain bool constants, previous
simplification will have reduced this to "boolvar" or "NOT boolvar",
and we have to reverse that if we want to make an indexqual.  There is
existing code to do so, but it only fires when the index's opfamily
is BOOL_BTREE_FAM_OID or BOOL_HASH_FAM_OID.  Thus extension AMs, or
extension opclasses such as contrib/btree_gin, are out in the cold.

The reason for hard-wiring the set of relevant opfamilies was mostly
to avoid a catalog lookup in a hot code path.  We can improve matters
while not taking much of a performance hit by relying on the
hard-wired set when the opfamily OID is visibly built-in, and only
checking the catalogs when dealing with an extension opfamily.

While here, rename IsBooleanOpfamily to IsBuiltinBooleanOpfamily
to remind future users of that macro of its limitations.  At some
point we might want to make indxpath.c's improved version of the
test globally accessible, but it's not presently needed elsewhere.

Zongliang Quan and Tom Lane

Discussion: https://postgr.es/m/f293b91d-1d46-d386-b6bb-4b06ff5c667b@yeah.net

3 years ago

Tomas Vondra

57e3c5160b

Add bool GiST opclass to btree_gist

Adds bool opclass to btree_gist extension, to allow creating GiST
indexes on bool columns. GiST indexes on a single bool column don't seem
particularly useful, but this allows defining exclusion constraings
involving a bool column, for example.

Author: Emre Hasegeli
Reviewed-by: Andrey Borodin
Discussion: https://postgr.es/m/CAE2gYzyDKJBZngssR84VGZEN=Ux=V9FV23QfPgo+7-yYnKKg4g@mail.gmail.com

4 years ago

2 Commits (795e94c70cf13f60b2cb4010f29a1bca542d2031)