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
Branch
------
master
Details
-------
https://git.postgresql.org/pg/commitdiff/e2e1bbde46a3509c3b7e830196f4314242925247
Modified Files
--------------
doc/src/sgml/indices.sgml | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)