pgsql: Clarify old comment about qual_is_pushdown_safe's handling of su

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: pgsql-committers(at)postgresql(dot)org
Subject: pgsql: Clarify old comment about qual_is_pushdown_safe's handling of su
Date: 2017-11-29 04:32:25
Message-ID: E1eJu2r-0008DY-PV@gemulon.postgresql.org
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Clarify old comment about qual_is_pushdown_safe's handling of subplans.

This comment glossed over the difference between initplans and subplans,
but they are indeed different for our purposes here.

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/801386af62eac84c13feec5a643c120cf0ce33bd

Modified Files
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src/backend/optimizer/path/allpaths.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)

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