*** pgsql/src/include/nodes/relation.h	2009/02/06 23:43:24	1.168
--- pgsql/src/include/nodes/relation.h	2009/02/25 03:30:37	1.169
***************
*** 7,13 ****
   * Portions Copyright (c) 1996-2009, PostgreSQL Global Development Group
   * Portions Copyright (c) 1994, Regents of the University of California
   *
!  * $PostgreSQL: pgsql/src/include/nodes/relation.h,v 1.167 2009/01/01 17:24:00 momjian Exp $
   *
   *-------------------------------------------------------------------------
   */
--- 7,13 ----
   * Portions Copyright (c) 1996-2009, PostgreSQL Global Development Group
   * Portions Copyright (c) 1994, Regents of the University of California
   *
!  * $PostgreSQL: pgsql/src/include/nodes/relation.h,v 1.168 2009/02/06 23:43:24 tgl Exp $
   *
   *-------------------------------------------------------------------------
   */
*************** typedef struct InnerIndexscanInfo
*** 1076,1105 ****
  } InnerIndexscanInfo;
  
  /*
-  * "Flattened SubLinks"
-  *
-  * When we pull an IN or EXISTS SubLink up into the parent query, the
-  * join conditions extracted from the IN/EXISTS clause need to be specially
-  * treated in distribute_qual_to_rels processing.  We handle this by
-  * wrapping such expressions in a FlattenedSubLink node that identifies
-  * the join they come from.  The FlattenedSubLink node is discarded after
-  * distribute_qual_to_rels, having served its purpose.
-  *
-  * Although the planner treats this as an expression node type, it is not
-  * recognized by the parser or executor, so we declare it here rather than
-  * in primnodes.h.
-  */
- 
- typedef struct FlattenedSubLink
- {
- 	Expr		xpr;
- 	JoinType	jointype;		/* must be JOIN_SEMI or JOIN_ANTI */
- 	Relids		lefthand;		/* base relids treated as syntactic LHS */
- 	Relids		righthand;		/* base relids syntactically within RHS */
- 	Expr	   *quals;			/* join quals (in explicit-AND format) */
- } FlattenedSubLink;
- 
- /*
   * Placeholder node for an expression to be evaluated below the top level
   * of a plan tree.  This is used during planning to represent the contained
   * expression.  At the end of the planning process it is replaced by either
--- 1076,1081 ----
*************** typedef struct PlaceHolderVar
*** 1171,1178 ****
   * For purposes of join selectivity estimation, we create transient
   * SpecialJoinInfo structures for regular inner joins; so it is possible
   * to have jointype == JOIN_INNER in such a structure, even though this is
!  * not allowed within join_info_list.  Note that lhs_strict, delay_upper_joins,
!  * and join_quals are not set meaningfully for such structs.
   */
  
  typedef struct SpecialJoinInfo
--- 1147,1157 ----
   * For purposes of join selectivity estimation, we create transient
   * SpecialJoinInfo structures for regular inner joins; so it is possible
   * to have jointype == JOIN_INNER in such a structure, even though this is
!  * not allowed within join_info_list.  We also create transient
!  * SpecialJoinInfos with jointype == JOIN_INNER for outer joins, since for
!  * cost estimation purposes it is sometimes useful to know the join size under
!  * plain innerjoin semantics.  Note that lhs_strict, delay_upper_joins, and
!  * join_quals are not set meaningfully within such structs.
   */
  
  typedef struct SpecialJoinInfo