Tom Lane d4fd571b3e Doc: clarify data type behavior of COALESCE and NULLIF.
After studying the code, NULLIF is a lot more subtle than you might
have guessed.

Discussion: https://postgr.es/m/160486028730.25500.15740897403028593550@wrigleys.postgresql.org
2020-11-09 12:02:24 -05:00
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