select.test:

  Manual post-merge

mysql-test/t/select.test

@@ -1985,3 +1985,22 @@ EXPLAIN SELECT * FROM t1 LEFT JOIN t2 USE INDEX (a) ON t1.a=t2.a;
 EXPLAIN SELECT * FROM t1 LEFT JOIN t2 FORCE INDEX (a) ON t1.a=t2.a;
 
 DROP TABLE t1, t2;
+
+
+#
+# Test case for bug 7098: substitution of a constant for a string field 
+#
+
+CREATE TABLE t1 ( city char(30) );
+INSERT INTO t1 VALUES ('London');
+INSERT INTO t1 VALUES ('Paris');
+
+SELECT * FROM t1 WHERE city='London';
+SELECT * FROM t1 WHERE city='london';
+EXPLAIN SELECT * FROM t1 WHERE city='London' AND city='london';
+SELECT * FROM t1 WHERE city='London' AND city='london';
+EXPLAIN SELECT * FROM t1 WHERE city LIKE '%london%' AND city='London';
+SELECT * FROM t1 WHERE city LIKE '%london%' AND city='London';
+
+DROP TABLE t1;
+