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Add comment that ec_relids excludes "child" EquivalenceClass members.

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This was already documented a few lines further down, but the comment
just beside the field declaration could be misleading.  Per gripe
from Kyotaro Horiguchi.
This commit is contained in:
Tom Lane
2014-03-05 16:00:22 -05:00
parent 406a1a9ef0
commit 8cf0ad1ea3
1 changed files with 2 additions and 1 deletions
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3
src/include/nodes/relation.h
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@@ -585,7 +585,8 @@ typedef struct EquivalenceClass
List *ec_members; /* list of EquivalenceMembers */
List *ec_sources; /* list of generating RestrictInfos */
List *ec_derives; /* list of derived RestrictInfos */
Relids ec_relids; /* all relids appearing in ec_members */
Relids ec_relids; /* all relids appearing in ec_members, except
* for child members (see below) */
bool ec_has_const; /* any pseudoconstants in ec_members? */
bool ec_has_volatile; /* the (sole) member is a volatile expr */
bool ec_below_outer_join; /* equivalence applies below an OJ */