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Author SHA1 Message Date
Tom Lane
04d7fa5e31 Fix contrib/pg_trgm's similarity() function for trigram-free strings. 
Cases such as similarity('', '') produced a NaN result due to computing
0/0.  Per discussion, make it return zero instead.

This appears to be the basic cause of bug #7867 from Michele Baravalle,
although it remains unclear why her installation doesn't think Cyrillic
letters are letters.

Back-patch to all active branches.
 2013-02-13 14:07:22 -05:00
Tom Lane
30e2c42e00 Fix a few contrib regression test scripts that hadn't gotten the word 
about best practice for including the module creation scripts: to wit
that you should suppress NOTICE messages.  This avoids creating
regression failures by adding or removing comment lines in the module
scripts.
 2007-11-13 06:29:04 +00:00
Teodor Sigaev
15f91f2789 Add GIN support for pg_trgm. From Guillaume Smet <guillaume.smet@gmail.com> 
with minor editorization by me.
 2007-03-14 14:15:40 +00:00
Teodor Sigaev
cbfa4092bb trgm - Trigram matching for PostgreSQL 
--------------------------------------

	The pg_trgm contrib module provides functions and index classes
	for determining the similarity of text based on trigram
	matching.
 2004-05-31 17:18:12 +00:00