Merge olga.mysql.com:/home/igor/mysql-5.0-opt

into  olga.mysql.com:/home/igor/dev-opt/mysql-5.1-opt

mysql-test/t/type_newdecimal.test

@@ -1172,6 +1172,39 @@ drop table t1;
 #
 
 SELECT 1.000000000000 * 99.999999999998 / 100 a,1.000000000000 * (99.999999999998 / 100) b;
+
+#
+# Bug #29415: CAST AS DECIMAL(P,S) with too big precision/scale 
+#
+
+SELECT CAST(1 AS decimal(65,10));
+--error ER_TOO_BIG_PRECISION
+SELECT CAST(1 AS decimal(66,10));
+
+SELECT CAST(1 AS decimal(65,30));
+--error ER_TOO_BIG_SCALE
+SELECT CAST(1 AS decimal(65,31));
+
+CREATE TABLE t1 (a int DEFAULT NULL, b int DEFAULT NULL);
+INSERT INTO t1 VALUES (3,30), (1,10), (2,10);
+SELECT a+CAST(1 AS decimal(65,30)) AS aa, SUM(b) FROM t1 GROUP BY aa;
+--error ER_TOO_BIG_SCALE
+SELECT a+CAST(1 AS decimal(65,31)) AS aa, SUM(b) FROM t1 GROUP BY aa;
+
+DROP TABLE t1;
+
+#
+# Bug #29417: assertion abort for a grouping query with decimal user variable
+#
+
+CREATE TABLE t1 (a int DEFAULT NULL, b int DEFAULT NULL);
+INSERT INTO t1 VALUES (3,30), (1,10), (2,10);
+
+SET @a= CAST(1 AS decimal);
+SELECT 1 FROM t1 GROUP BY @b := @a, @b;
+
+DROP TABLE t1;
+
 --echo End of 5.0 tests
 
 #

sql/field.cc

@@ -2316,6 +2316,7 @@ Field_new_decimal::Field_new_decimal(uchar *ptr_arg,
              unireg_check_arg, field_name_arg, dec_arg, zero_arg, unsigned_arg)
 {
   precision= my_decimal_length_to_precision(len_arg, dec_arg, unsigned_arg);
+  set_if_smaller(precision, DECIMAL_MAX_PRECISION);
   DBUG_ASSERT((precision <= DECIMAL_MAX_PRECISION) &&
               (dec <= DECIMAL_MAX_SCALE));
   bin_size= my_decimal_get_binary_size(precision, dec);
@@ -2332,6 +2333,7 @@ Field_new_decimal::Field_new_decimal(uint32 len_arg,
              NONE, name, dec_arg, 0, unsigned_arg)
 {
   precision= my_decimal_length_to_precision(len_arg, dec_arg, unsigned_arg);
+  set_if_smaller(precision, DECIMAL_MAX_PRECISION);
   DBUG_ASSERT((precision <= DECIMAL_MAX_PRECISION) &&
               (dec <= DECIMAL_MAX_SCALE));
   bin_size= my_decimal_get_binary_size(precision, dec);