diff options
Diffstat (limited to 'src/include/nodes/parsenodes.h')
| -rw-r--r-- | src/include/nodes/parsenodes.h | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/src/include/nodes/parsenodes.h b/src/include/nodes/parsenodes.h index 5e112d178ba..1edd094dbf6 100644 --- a/src/include/nodes/parsenodes.h +++ b/src/include/nodes/parsenodes.h @@ -13,7 +13,7 @@ * Portions Copyright (c) 1996-2008, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * - * $PostgreSQL: pgsql/src/include/nodes/parsenodes.h,v 1.377 2008/10/31 08:39:22 heikki Exp $ + * $PostgreSQL: pgsql/src/include/nodes/parsenodes.h,v 1.378 2008/11/15 19:43:46 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -700,14 +700,23 @@ typedef struct SortGroupClause * RowMarkClause - * representation of FOR UPDATE/SHARE clauses * - * We create a separate RowMarkClause node for each target relation + * We create a separate RowMarkClause node for each target relation. In the + * output of the parser and rewriter, all RowMarkClauses have rti == prti and + * isParent == false. When the planner discovers that a target relation + * is the root of an inheritance tree, it sets isParent true, and adds an + * additional RowMarkClause to the list for each child relation (including + * the target rel itself in its role as a child). The child entries have + * rti == child rel's RT index, prti == parent's RT index, and can therefore + * be recognized as children by the fact that prti != rti. */ typedef struct RowMarkClause { NodeTag type; Index rti; /* range table index of target relation */ + Index prti; /* range table index of parent relation */ bool forUpdate; /* true = FOR UPDATE, false = FOR SHARE */ bool noWait; /* NOWAIT option */ + bool isParent; /* set by planner when expanding inheritance */ } RowMarkClause; /* |