Tom Lane f73a16340c 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 14:07:17 -05:00

..

pg_trgm.sql

Fix contrib/pg_trgm's similarity() function for trigram-free strings.

2013-02-13 14:07:17 -05:00