diff options
Diffstat (limited to 'src/include/nodes/parsenodes.h')
| -rw-r--r-- | src/include/nodes/parsenodes.h | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/src/include/nodes/parsenodes.h b/src/include/nodes/parsenodes.h index f1a1e828fc..65c3698a84 100644 --- a/src/include/nodes/parsenodes.h +++ b/src/include/nodes/parsenodes.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/parsenodes.h,v 1.370 2008/08/02 21:32:00 tgl Exp $ + * $PostgreSQL: pgsql/src/include/nodes/parsenodes.h,v 1.371 2008/08/07 01:11:51 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -797,7 +797,12 @@ typedef struct SelectStmt * top-level Query node containing the leaf SELECTs as subqueries in its * range table. Its setOperations field shows the tree of set operations, * with leaf SelectStmt nodes replaced by RangeTblRef nodes, and internal - * nodes replaced by SetOperationStmt nodes. + * nodes replaced by SetOperationStmt nodes. Information about the output + * column types is added, too. (Note that the child nodes do not necessarily + * produce these types directly, but we've checked that their output types + * can be coerced to the output column type.) Also, if it's not UNION ALL, + * information about the types' sort/group semantics is provided in the form + * of a SortGroupClause list (same representation as, eg, DISTINCT). * ---------------------- */ typedef struct SetOperationStmt @@ -812,6 +817,8 @@ typedef struct SetOperationStmt /* Fields derived during parse analysis: */ List *colTypes; /* OID list of output column type OIDs */ List *colTypmods; /* integer list of output column typmods */ + List *groupClauses; /* a list of SortGroupClause's */ + /* groupClauses is NIL if UNION ALL, but must be set otherwise */ } SetOperationStmt; |