like match when collation is unspecified (#3023)

Author: jycor

enginetest/queries/json_table_queries.go

@@ -139,6 +139,12 @@ var JSONTableQueryTests = []QueryTest{
 			{9},
 		},
 	},
+	{
+		Query: "select * from json_table('[\"foo\", \"bar\"]', \"$[*]\" columns(tag text path '$')) as tags where tag like 'foo';",
+		Expected: []sql.Row{
+			{"foo"},
+		},
+	},
 }
 
 var JSONTableScriptTests = []ScriptTest{

sql/expression/like.go

@@ -120,9 +120,6 @@ func (l *Like) Eval(ctx *sql.Context, row sql.Row) (interface{}, error) {
 	if err != nil {
 		return nil, err
 	}
-	if lm.collation == sql.Collation_Unspecified {
-		return false, nil
-	}
 
 	ok := lm.Match(left.(string))
 	if l.cached {