add test

pingcap · Jul 26, 2019 · 3291f08 · 3291f08
1 parent 1017f24
commit 3291f08
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diff --git a/parser_test.go b/parser_test.go
@@ -1105,6 +1105,9 @@ func (s *testParserSuite) TestBuiltin(c *C) {
 		// for cast as signed int, fix issue #3691.
 		{"select cast(1 as signed int);", true, "SELECT CAST(1 AS SIGNED)"},
 
+		// for cast as double
+		{"select cast(1 as double);", true, "SELECT CAST(1 AS DOUBLE)"},
+
 		// for last_insert_id
 		{"SELECT last_insert_id();", true, "SELECT LAST_INSERT_ID()"},
 		{"SELECT last_insert_id(1);", true, "SELECT LAST_INSERT_ID(1)"},

diff --git a/types/field_type.go b/types/field_type.go
@@ -299,6 +299,8 @@ func (ft *FieldType) RestoreAsCastType(ctx *format.RestoreCtx) {
 		}
 	case mysql.TypeJSON:
 		ctx.WriteKeyWord("JSON")
+	case mysql.TypeDouble:
+		ctx.WriteKeyWord("DOUBLE")
 	}
 }