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doc: clarify when expression indexes evaluate their expressions
authorBruce Momjian <bruce@momjian.us>
Wed, 22 Dec 2021 21:29:16 +0000 (16:29 -0500)
committerBruce Momjian <bruce@momjian.us>
Wed, 22 Dec 2021 21:29:16 +0000 (16:29 -0500)
commit2ff209953e0a7b4ce9df1c1ba15783345ef5659f
tree3c60456bf9cb2e6f486313a40ae91229bb96c43etree
parent420f9ac1b77cca142d4ab7919a4f2b703c1278b8commit | diff
doc:  clarify when expression indexes evaluate their expressions

Only non-HOT updates evaluate the index expression.

Reported-by: Chris Lowder
Discussion: https://postgr.es/m/163967385701.26064.15365003480975321072@wrigleys.postgresql.org

Backpatch-through: 10
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