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Tom Lane 4a14f13a0a Improve hash_create's API for selecting simple-binary-key hash functions. ... Previously, if you wanted anything besides C-string hash keys, you had to specify a custom hashing function to hash_create(). Nearly all such callers were specifying tag_hash or oid_hash; which is tedious, and rather error-prone, since a caller could easily miss the opportunity to optimize by using hash_uint32 when appropriate. Replace this with a design whereby callers using simple binary-data keys just specify HASH_BLOBS and don't need to mess with specific support functions. hash_create() itself will take care of optimizing when the key size is four bytes. This nets out saving a few hundred bytes of code space, and offers a measurable performance improvement in tidbitmap.c (which was not exploiting the opportunity to use hash_uint32 for its 4-byte keys). There might be some wins elsewhere too, I didn't analyze closely. In future we could look into offering a similar optimized hashing function for 8-byte keys. Under this design that could be done in a centralized and machine-independent fashion, whereas getting it right for keys of platform-dependent sizes would've been notationally painful before. For the moment, the old way still works fine, so as not to break source code compatibility for loadable modules. Eventually we might want to remove tag_hash and friends from the exported API altogether, since there's no real need for them to be explicitly referenced from outside dynahash.c. Teodor Sigaev and Tom Lane		11 years ago
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data	trgm - Trigram matching for PostgreSQL	22 years ago
expected	Make contrib/pg_trgm also support regex searches with GiST indexes.	13 years ago
sql	Make contrib/pg_trgm also support regex searches with GiST indexes.	13 years ago
.gitignore	Support "make check" in contrib	15 years ago
Makefile	Add file version information to most installed Windows binaries.	12 years ago
pg_trgm--1.0--1.1.sql	Fix typo in update scripts for some contrib modules.	13 years ago
pg_trgm--1.1.sql	Fix volatility markings of some contrib I/O functions.	11 years ago
pg_trgm--unpackaged--1.0.sql	Fix typos in some error messages thrown by extension scripts when fed to psql.	11 years ago
pg_trgm.control	Support indexing of regular-expression searches in contrib/pg_trgm.	13 years ago
trgm.h	Make contrib/pg_trgm also support regex searches with GiST indexes.	13 years ago
trgm_gin.c	pgindent run for 9.4	12 years ago
trgm_gist.c	pgindent run for 9.4	12 years ago
trgm_op.c	Switch to CRC-32C in WAL and other places.	11 years ago
trgm_regexp.c	Improve hash_create's API for selecting simple-binary-key hash functions.	11 years ago