bzr commit into mysql-trunk branch (jorgen.loland:3726) Bug#11766317

[Jorgen Loland]

#At file:///export/home/jl208045/mysql/mysql-trunk-59405/ based on revid:alexander.nozdrin@stripped

 3726 Jorgen Loland	2011-03-04 [merge]
      Merge BUG#11766317 from 5.5 to trunk
     @ mysql-test/r/func_set.result
        Add test for BUG#59405
     @ mysql-test/t/func_set.test
        Add test for BUG#59405
     @ sql/item_func.cc
        Add variable Item_func_find_in_set::args_0_null_value

    modified:
      mysql-test/r/func_set.result
      mysql-test/t/func_set.test
      sql/item_func.cc
=== modified file 'mysql-test/r/func_set.result'
--- a/mysql-test/r/func_set.result	2009-06-16 14:36:15 +0000
+++ b/mysql-test/r/func_set.result	2011-03-04 14:46:17 +0000
@@ -159,3 +159,45 @@ SELECT CONVERT( a USING latin1 ) FROM t2
 CONVERT( a USING latin1 )
 
 DROP TABLE t1, t2;
+#
+# BUG#59405: FIND_IN_SET won't work normaly after upgrade from 5.1 to 5.5
+#
+CREATE TABLE t1(days set('1','2','3','4','5','6','7'));
+INSERT INTO t1 VALUES('1,2,3,4,5,6,7'), (NULL), ('1,2,3,4,5,6,7');
+
+SELECT * FROM t1 WHERE FIND_IN_SET(DAYOFWEEK(CURRENT_DATE()), days);
+days
+1,2,3,4,5,6,7
+1,2,3,4,5,6,7
+SELECT * FROM t1 WHERE FIND_IN_SET(DAYOFWEEK(CURRENT_DATE()), days) IS UNKNOWN;
+days
+NULL
+SELECT * FROM t1 WHERE FIND_IN_SET(DAYOFWEEK(CURRENT_DATE()), NULL);
+days
+SELECT * FROM t1 WHERE FIND_IN_SET(DAYOFWEEK(CURRENT_DATE()), NULL) IS UNKNOWN;
+days
+1,2,3,4,5,6,7
+NULL
+1,2,3,4,5,6,7
+SELECT * FROM t1 WHERE FIND_IN_SET(7, days);
+days
+1,2,3,4,5,6,7
+1,2,3,4,5,6,7
+SELECT * FROM t1 WHERE FIND_IN_SET(8, days);
+days
+SELECT * FROM t1 WHERE FIND_IN_SET(NULL, days);
+days
+SELECT * FROM t1 WHERE FIND_IN_SET(NULL, days) IS UNKNOWN;
+days
+1,2,3,4,5,6,7
+NULL
+1,2,3,4,5,6,7
+SELECT * FROM t1 WHERE FIND_IN_SET(NULL, NULL);
+days
+SELECT * FROM t1 WHERE FIND_IN_SET(NULL, NULL) IS UNKNOWN;
+days
+1,2,3,4,5,6,7
+NULL
+1,2,3,4,5,6,7
+
+DROP TABLE t1;

=== modified file 'mysql-test/t/func_set.test'
--- a/mysql-test/t/func_set.test	2009-06-16 14:36:15 +0000
+++ b/mysql-test/t/func_set.test	2011-03-04 14:46:17 +0000
@@ -97,3 +97,25 @@ SELECT CONVERT( a USING latin1 ) FROM t1
 SELECT CONVERT( a USING latin1 ) FROM t2;
 
 DROP TABLE t1, t2;
+
+--echo #
+--echo # BUG#59405: FIND_IN_SET won't work normaly after upgrade from 5.1 to 5.5
+--echo #
+
+CREATE TABLE t1(days set('1','2','3','4','5','6','7'));
+INSERT INTO t1 VALUES('1,2,3,4,5,6,7'), (NULL), ('1,2,3,4,5,6,7');
+
+--echo
+SELECT * FROM t1 WHERE FIND_IN_SET(DAYOFWEEK(CURRENT_DATE()), days);
+SELECT * FROM t1 WHERE FIND_IN_SET(DAYOFWEEK(CURRENT_DATE()), days) IS UNKNOWN; 
+SELECT * FROM t1 WHERE FIND_IN_SET(DAYOFWEEK(CURRENT_DATE()), NULL);
+SELECT * FROM t1 WHERE FIND_IN_SET(DAYOFWEEK(CURRENT_DATE()), NULL) IS UNKNOWN; 
+SELECT * FROM t1 WHERE FIND_IN_SET(7, days);
+SELECT * FROM t1 WHERE FIND_IN_SET(8, days);
+SELECT * FROM t1 WHERE FIND_IN_SET(NULL, days); 
+SELECT * FROM t1 WHERE FIND_IN_SET(NULL, days) IS UNKNOWN; 
+SELECT * FROM t1 WHERE FIND_IN_SET(NULL, NULL); 
+SELECT * FROM t1 WHERE FIND_IN_SET(NULL, NULL) IS UNKNOWN; 
+
+--echo
+DROP TABLE t1;

=== modified file 'sql/item_func.cc'
--- a/sql/item_func.cc	2011-03-04 14:59:32 +0000
+++ b/sql/item_func.cc	2011-03-04 15:20:33 +0000
@@ -3021,6 +3021,8 @@ void Item_func_find_in_set::fix_length_a
       String *find=args[0]->val_str(&value);
       if (find)
       {
+        // find is not NULL pointer so args[0] is not a null-value
+        DBUG_ASSERT(!args[0]->null_value);
 	enum_value= find_type(((Field_enum*) field)->typelib,find->ptr(),
 			      find->length(), 0);
 	enum_bit=0;
@@ -3039,11 +3041,22 @@ longlong Item_func_find_in_set::val_int(
   DBUG_ASSERT(fixed == 1);
   if (enum_value)
   {
-    ulonglong tmp=(ulonglong) args[1]->val_int();
-    if (!(null_value=args[1]->null_value || args[0]->null_value))
+    // enum_value is set iff args[0]->const_item() in fix_length_and_dec().
+    DBUG_ASSERT(args[0]->const_item());
+
+    ulonglong tmp= (ulonglong) args[1]->val_int();
+    null_value= args[1]->null_value;
+    /* 
+      No need to check args[0]->null_value since enum_value is set iff
+      args[0] is a non-null const item. Note: no DBUG_ASSERT on
+      args[0]->null_value here because args[0] may have been replaced
+      by an Item_cache on which val_int() has not been called. See
+      BUG#11766317
+    */
+    if (!null_value)
     {
       if (tmp & enum_bit)
-	return enum_value;
+        return enum_value;
     }
     return 0L;
   }

No bundle (reason: revision is a merge).