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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.		13 years ago
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pg_trgm.sql	Fix contrib/pg_trgm's similarity() function for trigram-free strings.	13 years ago