expression: fix wrong result for unsigned non-const int cmp const dur…

…ation (#46620) (#46701)

close #45410

expression/integration_test.go

@@ -7469,3 +7469,18 @@ func TestIfFunctionWithNull(t *testing.T) {
 	tk.MustQuery("select min(if(apply_to_now_days <= 30,loan,null)) as min, max(if(apply_to_now_days <= 720,loan,null)) as max from (select loan, datediff(from_unixtime(unix_timestamp('2023-05-18 18:43:43') + 18000), from_unixtime(apply_time/1000 + 18000)) as apply_to_now_days from orders) t1;").Sort().Check(
 		testkit.Rows("20000 35100"))
 }
+
+func TestIssue45410(t *testing.T) {
+	store, clean := testkit.CreateMockStore(t)
+	defer clean()
+	tk := testkit.NewTestKit(t, store)
+	// Issue 45410
+	tk.MustExec("create database testIssue45410")
+	defer tk.MustExec("drop database testIssue45410")
+	tk.MustExec("use testIssue45410")
+
+	tk.MustExec("DROP TABLE IF EXISTS t1;")
+	tk.MustExec("CREATE TABLE t1 (c1 TINYINT(1) UNSIGNED NOT NULL );")
+	tk.MustExec("INSERT INTO t1 VALUES (0);")
+	tk.MustQuery("SELECT c1>=CAST('-787360724' AS TIME) FROM t1;").Check(testkit.Rows("1"))
+}

types/datum.go

@@ -1192,9 +1192,10 @@ func (d *Datum) convertToUint(sc *stmtctx.StatementContext, target *FieldType) (
 	case KindMysqlDuration:
 		dec := d.GetMysqlDuration().ToNumber()
 		err = dec.Round(dec, 0, ModeHalfUp)
-		ival, err1 := dec.ToInt()
-		if err1 == nil {
-			val, err = ConvertIntToUint(sc, ival, upperBound, tp)
+		var err1 error
+		val, err1 = ConvertDecimalToUint(sc, dec, upperBound, tp)
+		if err == nil {
+			err = err1
 		}
 	case KindMysqlDecimal:
 		val, err = ConvertDecimalToUint(sc, d.GetMysqlDecimal(), upperBound, tp)