Add new SQL:2008 error codes for invalid LIMIT and OFFSET values. Remove

unused nonstandard error code that was perhaps intended for this but never
used.

doc/src/sgml/errcodes.sgml

-<!-- $PostgreSQL: pgsql/doc/src/sgml/errcodes.sgml,v 1.26 2008/12/28 18:53:53 tgl Exp $ -->
+<!-- $PostgreSQL: pgsql/doc/src/sgml/errcodes.sgml,v 1.27 2009/03/04 10:55:00 petere Exp $ -->
 
 <appendix id="errcodes-appendix">
  <title><productname>PostgreSQL</productname> Error Codes</title>
@@ -444,12 +444,6 @@
 <entry>invalid_indicator_parameter_value</entry>
 </row>
 
-<row>
-<entry><literal>22020</literal></entry>
-<entry>INVALID LIMIT VALUE</entry>
-<entry>invalid_limit_value</entry>
-</row>
-
 <row>
 <entry><literal>22023</literal></entry>
 <entry>INVALID PARAMETER VALUE</entry>
@@ -462,6 +456,18 @@
 <entry>invalid_regular_expression</entry>
 </row>
 
+<row>
+<entry><literal>2201W</literal></entry>
+<entry>INVALID ROW COUNT IN LIMIT CLAUSE</entry>
+<entry>invalid_row_count_in_limit_clause</entry>
+</row>
+
+<row>
+<entry><literal>2201X</literal></entry>
+<entry>INVALID ROW COUNT IN RESULT OFFSET CLAUSE</entry>
+<entry>invalid_row_count_in_result_offset_clause</entry>
+</row>
+
 <row>
 <entry><literal>22009</literal></entry>
 <entry>INVALID TIME ZONE DISPLACEMENT VALUE</entry>

src/backend/executor/nodeLimit.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/executor/nodeLimit.c,v 1.35 2009/01/01 17:23:41 momjian Exp $
+ *	  $PostgreSQL: pgsql/src/backend/executor/nodeLimit.c,v 1.36 2009/03/04 10:55:00 petere Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -247,7 +247,7 @@ recompute_limits(LimitState *node)
 			node->offset = DatumGetInt64(val);
 			if (node->offset < 0)
 				ereport(ERROR,
-						(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
+						(errcode(ERRCODE_INVALID_ROW_COUNT_IN_RESULT_OFFSET_CLAUSE),
 						 errmsg("OFFSET must not be negative")));
 		}
 	}
@@ -274,7 +274,7 @@ recompute_limits(LimitState *node)
 			node->count = DatumGetInt64(val);
 			if (node->count < 0)
 				ereport(ERROR,
-						(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
+						(errcode(ERRCODE_INVALID_ROW_COUNT_IN_LIMIT_CLAUSE),
 						 errmsg("LIMIT must not be negative")));
 			node->noCount = false;
 		}

src/include/utils/errcodes.h

@@ -11,7 +11,7 @@
  *
  * Copyright (c) 2003-2009, PostgreSQL Global Development Group
  *
- * $PostgreSQL: pgsql/src/include/utils/errcodes.h,v 1.28 2009/01/01 17:24:02 momjian Exp $
+ * $PostgreSQL: pgsql/src/include/utils/errcodes.h,v 1.29 2009/03/04 10:55:00 petere Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -133,9 +133,10 @@
 #define ERRCODE_INVALID_ESCAPE_SEQUENCE		MAKE_SQLSTATE('2','2', '0','2','5')
 #define ERRCODE_NONSTANDARD_USE_OF_ESCAPE_CHARACTER		MAKE_SQLSTATE('2','2', 'P','0','6')
 #define ERRCODE_INVALID_INDICATOR_PARAMETER_VALUE		MAKE_SQLSTATE('2','2', '0','1','0')
-#define ERRCODE_INVALID_LIMIT_VALUE			MAKE_SQLSTATE('2','2', '0','2','0')
 #define ERRCODE_INVALID_PARAMETER_VALUE		MAKE_SQLSTATE('2','2', '0','2','3')
 #define ERRCODE_INVALID_REGULAR_EXPRESSION	MAKE_SQLSTATE('2','2', '0','1','B')
+#define ERRCODE_INVALID_ROW_COUNT_IN_LIMIT_CLAUSE	MAKE_SQLSTATE('2', '2', '0', '1', 'W')
+#define ERRCODE_INVALID_ROW_COUNT_IN_RESULT_OFFSET_CLAUSE	MAKE_SQLSTATE('2', '2', '0', '1', 'X')
 #define ERRCODE_INVALID_TIME_ZONE_DISPLACEMENT_VALUE	MAKE_SQLSTATE('2','2', '0','0','9')
 #define ERRCODE_INVALID_USE_OF_ESCAPE_CHARACTER		MAKE_SQLSTATE('2','2', '0','0','C')
 #define ERRCODE_MOST_SPECIFIC_TYPE_MISMATCH MAKE_SQLSTATE('2','2', '0','0','G')

src/pl/plpgsql/src/plerrcodes.h

@@ -9,7 +9,7 @@
  *
  * Copyright (c) 2003-2009, PostgreSQL Global Development Group
  *
- * $PostgreSQL: pgsql/src/pl/plpgsql/src/plerrcodes.h,v 1.17 2009/01/01 17:24:04 momjian Exp $
+ * $PostgreSQL: pgsql/src/pl/plpgsql/src/plerrcodes.h,v 1.18 2009/03/04 10:55:00 petere Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -176,15 +176,19 @@
 },
 
 {
-	"invalid_limit_value", ERRCODE_INVALID_LIMIT_VALUE
+	"invalid_parameter_value", ERRCODE_INVALID_PARAMETER_VALUE
 },
 
 {
-	"invalid_parameter_value", ERRCODE_INVALID_PARAMETER_VALUE
+	"invalid_regular_expression", ERRCODE_INVALID_REGULAR_EXPRESSION
 },
 
 {
-	"invalid_regular_expression", ERRCODE_INVALID_REGULAR_EXPRESSION
+	"invalid_row_count_in_limit_clause", ERRCODE_INVALID_ROW_COUNT_IN_LIMIT_CLAUSE
+},
+
+{
+	"invalid_row_count_in_result_offset_clause", ERRCODE_INVALID_ROW_COUNT_IN_RESULT_OFFSET_CLAUSE
 },
 
 {