bk commit into 5.0 tree (msvensson:1.2407) BUG#25197

[msvensson]

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ChangeSet@stripped, 2007-02-23 10:28:50+01:00, msvensson@stripped +3 -0
  Bug#25197 repeat function returns null when using table field directly as count
   - Return empty string also if count is unsigned and value is 0

  mysql-test/r/func_str.result@stripped, 2007-02-23 10:28:49+01:00, msvensson@stripped
+14 -0
    Update test result

  mysql-test/t/func_str.test@stripped, 2007-02-23 10:28:49+01:00, msvensson@stripped
+22 -0
    Add test case for using an unsigned value as count parameter
    for REPEAT

  sql/item_strfunc.cc@stripped, 2007-02-23 10:28:49+01:00, msvensson@stripped +3 -1
    The repeat function should return the emptystring if
    count is unsigned and equal to zero or
    count is signed and less than or equal to zero

# This is a BitKeeper patch.  What follows are the unified diffs for the
# set of deltas contained in the patch.  The rest of the patch, the part
# that BitKeeper cares about, is below these diffs.
# User:	msvensson
# Host:	pilot.blaudden
# Root:	/home/msvensson/mysql/bug25197/my50-bug25197

--- 1.293/sql/item_strfunc.cc	2007-01-12 14:40:31 +01:00
+++ 1.294/sql/item_strfunc.cc	2007-02-23 10:28:49 +01:00
@@ -2251,8 +2251,10 @@ String *Item_func_repeat::val_str(String
   if (args[0]->null_value || args[1]->null_value)
     goto err;				// string and/or delim are null
   null_value= 0;
-  if ((count <= 0) && !args[1]->unsigned_flag)	// For nicer SQL code
+
+  if (count == 0 || count < 0 && !args[1]->unsigned_flag)
     return &my_empty_string;
+
   /* Assumes that the maximum length of a String is < INT_MAX32. */
   /* Bounds check on count:  If this is triggered, we will error. */
   if ((ulonglong) count > INT_MAX32)

--- 1.126/mysql-test/r/func_str.result	2007-01-12 15:34:59 +01:00
+++ 1.127/mysql-test/r/func_str.result	2007-02-23 10:28:49 +01:00
@@ -1940,4 +1940,18 @@ abcxx
 select lpad('abc', cast(5 as unsigned integer), 'x');
 lpad('abc', cast(5 as unsigned integer), 'x')
 xxabc
+DROP TABLE IF EXISTS t1;
+CREATE TABLE `t1` (
+`id` varchar(20) NOT NULL,
+`tire` tinyint(3) unsigned NOT NULL,
+PRIMARY KEY (`id`)
+);
+INSERT INTO `t1` (`id`, `tire`) VALUES ('A', 0), ('B', 1),('C', 2);
+SELECT REPEAT( '#', tire ) AS A,
+REPEAT( '#', tire % 999 ) AS B, tire FROM `t1`;
+A	B	tire
+		0
+#	#	1
+##	##	2
+DROP TABLE t1;
 End of 5.0 tests

--- 1.99/mysql-test/t/func_str.test	2007-01-12 14:40:31 +01:00
+++ 1.100/mysql-test/t/func_str.test	2007-02-23 10:28:49 +01:00
@@ -1008,4 +1008,26 @@ select repeat('a', cast(2 as unsigned in
 select rpad('abc', cast(5 as unsigned integer), 'x');
 select lpad('abc', cast(5 as unsigned integer), 'x');
 
+
+#
+# Bug #25197 :repeat function returns null when using table field directly as count
+#
+
+--disable_warnings
+DROP TABLE IF EXISTS t1;
+--enable_warnings
+
+CREATE TABLE `t1` (
+  `id` varchar(20) NOT NULL,
+  `tire` tinyint(3) unsigned NOT NULL,
+  PRIMARY KEY (`id`)
+);
+
+INSERT INTO `t1` (`id`, `tire`) VALUES ('A', 0), ('B', 1),('C', 2);
+
+SELECT REPEAT( '#', tire ) AS A,
+       REPEAT( '#', tire % 999 ) AS B, tire FROM `t1`;
+
+DROP TABLE t1;
+
 --echo End of 5.0 tests