]> granicus.if.org Git - postgresql/commit
projects / postgresql / commit
? search:
summary | shortlog | log | commit | commitdiff | tree
(parent: a25ccd6) | patch
Fix contrib/pg_trgm's similarity() function for trigram-free strings.
authorTom Lane <tgl@sss.pgh.pa.us>
Wed, 13 Feb 2013 19:07:13 +0000 (14:07 -0500)
committerTom Lane <tgl@sss.pgh.pa.us>
Wed, 13 Feb 2013 19:07:13 +0000 (14:07 -0500)
commit7b058a2dc8fd5889cd443fd6ee40f51068357245
treea6159966320a6a8f12c1fd6de321774db8dca055tree | snapshot
parenta25ccd615f5d306b5eadcb16bb5de9ea7b777b16commit | diff
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.
contrib/pg_trgm/expected/pg_trgm.out diff | blob | history
contrib/pg_trgm/sql/pg_trgm.sql diff | blob | history
contrib/pg_trgm/trgm_op.c diff | blob | history
Unnamed repository; edit this file 'description' to name the repository.