func_str.result:

  post-merge fix.
  ,

mysql-test/r/func_str.result

@@ -639,6 +639,26 @@ drop table t1;
 select charset(null), collation(null), coercibility(null);
 charset(null)	collation(null)	coercibility(null)
 binary	binary	5
+CREATE TABLE t1 (a int, b int);
+CREATE TABLE t2 (a int, b int);
+INSERT INTO t1 VALUES (1,1),(2,2);
+INSERT INTO t2 VALUES (2,2),(3,3);
+select t1.*,t2.* from t1 left join t2 on (t1.b=t2.b)
+where collation(t2.a) = _utf8'binary' order by t1.a,t2.a;
+a	b	a	b
+1	1	NULL	NULL
+2	2	2	2
+select t1.*,t2.* from t1 left join t2 on (t1.b=t2.b)
+where charset(t2.a) = _utf8'binary' order by t1.a,t2.a;
+a	b	a	b
+1	1	NULL	NULL
+2	2	2	2
+select t1.*,t2.* from t1 left join t2 on (t1.b=t2.b)
+where coercibility(t2.a) = 2 order by t1.a,t2.a;
+a	b	a	b
+1	1	NULL	NULL
+2	2	2	2
+DROP TABLE t1, t2;
 select SUBSTR('abcdefg',3,2);
 SUBSTR('abcdefg',3,2)
 cd