postgres

History

Tom Lane 186cbbda8f Provide hashing support for arrays. The core of this patch is hash_array() and associated typcache infrastructure, which works just about exactly like the existing support for array comparison. In addition I did some work to ensure that the planner won't think that an array type is hashable unless its element type is hashable, and similarly for sorting. This includes adding a datatype parameter to op_hashjoinable and op_mergejoinable, and adding an explicit "hashable" flag to SortGroupClause. The lack of a cross-check on the element type was a pre-existing bug in mergejoin support --- but it didn't matter so much before, because if you couldn't sort the element type there wasn't any good alternative to failing anyhow. Now that we have the alternative of hashing the array type, there are cases where we can avoid a failure by being picky at the planner stage, so it's time to be picky. The issue of exactly how to combine the per-element hash values to produce an array hash is still open for discussion, but the rest of this is pretty solid, so I'll commit it as-is.		15 years ago
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backend	Provide hashing support for arrays.	15 years ago
bin	Fix comparisons of pointers with zero to compare with NULL instead.	15 years ago
include	Provide hashing support for arrays.	15 years ago
interfaces	Fix ecpg test building process to not generate *.dSYM junk on Macs.	15 years ago
makefiles	Remove cvs keywords from all files.	15 years ago
pl	Give a more specific error message if you try to COMMIT, ROLLBACK or COPY	15 years ago
port	Fix comparisons of pointers with zero to compare with NULL instead.	15 years ago
template	Remove cvs keywords from all files.	15 years ago
test	Fix plpgsql's handling of "simple" expression evaluation.	15 years ago
timezone	Fix comparisons of pointers with zero to compare with NULL instead.	15 years ago
tools	Fix msvc build for localized versions of Visual C++	15 years ago
tutorial	Remove cvs keywords from all files.	15 years ago
.gitignore	Convert cvsignore to gitignore, and add .gitignore for build targets.	15 years ago
DEVELOPERS	Replace a couple of references to files that no longer exist in the source	17 years ago
Makefile	Remove cvs keywords from all files.	15 years ago
Makefile.global.in	Remove cvs keywords from all files.	15 years ago
Makefile.shlib	Remove cvs keywords from all files.	15 years ago
bcc32.mak	Remove cvs keywords from all files.	15 years ago
nls-global.mk	Fix makefile logic to not break the build when xgettext is missing	15 years ago
win32.mak	Remove cvs keywords from all files.	15 years ago