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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)
commite4f7c5144533c6ee9a84e1b1a30cedb20a3ebc75
treefca0fd247c82ac12de9d72e7a8a40f4eca428a74tree
parent28e1e5c2a91ccc2ad8f2749f36f0ac8eb3bca759commit | 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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