diff options
Diffstat (limited to 'src/include')
| -rw-r--r-- | src/include/nodes/relation.h | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/src/include/nodes/relation.h b/src/include/nodes/relation.h index 9e9e7afbc84..8476d7e85c1 100644 --- a/src/include/nodes/relation.h +++ b/src/include/nodes/relation.h @@ -7,7 +7,7 @@ * Portions Copyright (c) 1996-2008, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * - * $PostgreSQL: pgsql/src/include/nodes/relation.h,v 1.155 2008/03/24 21:53:04 tgl Exp $ + * $PostgreSQL: pgsql/src/include/nodes/relation.h,v 1.156 2008/04/21 20:54:15 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -1107,8 +1107,10 @@ typedef struct OuterJoinInfo * We record information about each such IN clause in an InClauseInfo struct. * These structs are kept in the PlannerInfo node's in_info_list. * - * Note: sub_targetlist is just a list of Vars or expressions; it does not - * contain TargetEntry nodes. + * Note: sub_targetlist is a bit misnamed; it is a list of the expressions + * on the RHS of the IN's join clauses. (This normally starts out as a list + * of Vars referencing the subquery outputs, but can get mutated if the + * subquery is flattened into the main query.) */ typedef struct InClauseInfo @@ -1116,8 +1118,8 @@ typedef struct InClauseInfo NodeTag type; Relids lefthand; /* base relids in lefthand expressions */ Relids righthand; /* base relids coming from the subselect */ - List *sub_targetlist; /* targetlist of original RHS subquery */ - List *in_operators; /* OIDs of the IN's equality operator(s) */ + List *sub_targetlist; /* RHS expressions of the IN's comparisons */ + List *in_operators; /* OIDs of the IN's equality operators */ } InClauseInfo; /* |