Update ORDER BY UNION function/exprssion wording (again).

diff --git a/src/backend/parser/analyze.c b/src/backend/parser/analyze.c
index d4f8379115b750166a2178993814c0d40d6e1139..ab262d870aa775fbf8ae33172ff7dd08fce8476c 100644 (file)
--- a/src/backend/parser/analyze.c
+++ b/src/backend/parser/analyze.c
@@ -6,7 +6,7 @@
  * Portions Copyright (c) 1996-2007, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- *     $PostgreSQL: pgsql/src/backend/parser/analyze.c,v 1.357 2007/01/11 20:04:50 momjian Exp $
+ *     $PostgreSQL: pgsql/src/backend/parser/analyze.c,v 1.358 2007/01/12 19:23:38 momjian Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -2547,7 +2547,9 @@ transformSetOperationStmt(ParseState *pstate, SelectStmt *stmt)
        if (tllen != list_length(qry->targetList))
                ereport(ERROR,
                                (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
-                                errmsg("A UNION/INTERSECT/EXCEPT ORDER BY cannot use expressions or functions, only result column names")));
+                                errmsg("invalid UNION/INTERSECT/EXCEPT ORDER BY clause"),
+                                errdetail("Only result column names can be used, not expressions or functions."),
+                                errhint("Add the expression/function to every SELECT, or place the query in a FROM clause.")));
 
        qry->limitOffset = transformLimitClause(pstate, limitOffset,
                                                                                        "OFFSET");