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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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expected	Allow CHECK constraints to be placed on foreign tables.	11 years ago
sql	Allow CHECK constraints to be placed on foreign tables.	11 years ago
.gitignore	Add postgres_fdw contrib module.	13 years ago
Makefile	Fix SHLIB_PREREQS use in contrib, allowing PGXS builds	11 years ago
connection.c	Improve hash_create's API for selecting simple-binary-key hash functions.	11 years ago
deparse.c	Fix mishandling of system columns in FDW queries.	11 years ago
option.c	pgindent run for 9.4	11 years ago
postgres_fdw--1.0.sql	Add postgres_fdw contrib module.	13 years ago
postgres_fdw.c	Revert misguided change to postgres_fdw FOR UPDATE/SHARE code.	11 years ago
postgres_fdw.control	Add postgres_fdw contrib module.	13 years ago
postgres_fdw.h	postgres_fdw.h: don't pull in rel.h when relcache.h is enough	11 years ago