fix issue:pingcap#11102

Unexcepted result in `SELECT ... CASE WHEN ... ELSE NULL...`
lovewin99 · Jul 6, 2019 · f933936 · f933936
1 parent 7b00dbb
commit f933936
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/expression/constant_fold.go b/expression/constant_fold.go
@@ -33,8 +33,8 @@ func init() {
 	}
 
 	specialNullRejectCheck = map[string]struct{}{
-		ast.NullEQ: struct{}{},
-		ast.Case:   struct{}{},
+		ast.NullEQ: {},
+		ast.Case:   {},
 	}
 }