types: fix collation for binary literal (#23591)

expression/integration_test.go

@@ -8080,3 +8080,15 @@ func (s *testIntegrationSerialSuite) TestIssue19116(c *C) {
 	tk.MustQuery("select coercibility(1);").Check(testkit.Rows("5"))
 	tk.MustQuery("select coercibility(1=1);").Check(testkit.Rows("5"))
 }
+
+func (s *testIntegrationSerialSuite) TestCollationForBinaryLiteral(c *C) {
+	tk := testkit.NewTestKit(c, s.store)
+	collate.SetNewCollationEnabledForTest(true)
+	defer collate.SetNewCollationEnabledForTest(false)
+	tk.MustExec("use test")
+	tk.MustExec("drop table if exists t")
+	tk.MustExec("CREATE TABLE t (`COL1` tinyblob NOT NULL,  `COL2` binary(1) NOT NULL,  `COL3` bigint(11) NOT NULL,  PRIMARY KEY (`COL1`(5),`COL2`,`COL3`) /*T![clustered_index] CLUSTERED */)")
+	tk.MustExec("insert into t values(0x1E,0xEC,6966939640596047133);")
+	tk.MustQuery("select * from t where col1 not in (0x1B,0x20) order by col1").Check(testkit.Rows("\x1e \xec 6966939640596047133"))
+	tk.MustExec("drop table t")
+}

types/datum.go

@@ -252,6 +252,7 @@ func (d *Datum) GetMysqlBit() BinaryLiteral {
 func (d *Datum) SetBinaryLiteral(b BinaryLiteral) {
 	d.k = KindBinaryLiteral
 	d.b = b
+	d.collation = charset.CollationBin
 }
 
 // SetMysqlBit sets MysqlBit value