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commit    8cf0ad1ea38db3e16ac04b408168df4c937862e6
Author:   Tom Lane <tgl@sss.pgh.pa.us>
Date:     Wed Mar 05 21:00:22 2014 +0000
First released in: 9.4.0

    Add comment that ec_relids excludes "child" EquivalenceClass members.
    
    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.


 src/include/nodes/relation.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/include/nodes/relation.h b/src/include/nodes/relation.h
index 8aa40d0ef01..c607b36e3a7 100644
--- a/src/include/nodes/relation.h
+++ b/src/include/nodes/relation.h
@@ -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 */


[parent: 406a1a9ef0be]