Thread: pgsql: Doc: clarify behavior of standard aggregates for null inputs.

Doc: clarify behavior of standard aggregates for null inputs.

Section 4.2.7 says that unless otherwise specified, built-in
aggregates ignore rows in which any input is null.  This is
not true of the JSON aggregates, but it wasn't documented.
Fix that.

Of the other entries in table 9.55, some were explicit about
ignoring nulls, and some weren't; for consistency and
self-contained-ness, make them all say it explicitly.

Per bug #15884 from Tim Möhlmann.  Back-patch to all supported
branches.

Discussion: https://postgr.es/m/15884-c32d848f787fcae3@postgresql.org

Branch
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REL_10_STABLE

Details
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https://git.postgresql.org/pg/commitdiff/f2cf22a59a49ddbe93dd231992d537f822d1b3c1

Modified Files
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doc/src/sgml/func.sgml | 26 +++++++++++++++-----------
1 file changed, 15 insertions(+), 11 deletions(-)