cherry pick pingcap#22869 to release-4.0

Signed-off-by: ti-srebot <ti-srebot@pingcap.com>

executor/point_get.go

@@ -345,9 +345,18 @@ func encodeIndexKey(e *baseExecutor, tblInfo *model.TableInfo, idxInfo *model.In
 			str, err = idxVals[i].ToString()
 			idxVals[i].SetString(str, colInfo.FieldType.Collate)
 		} else {
+<<<<<<< HEAD
 			idxVals[i], err = table.CastValue(e.ctx, idxVals[i], colInfo, true, false)
 			if types.ErrOverflow.Equal(err) {
 				return nil, false, kv.ErrNotExist
+=======
+			// If a truncated error or an overflow error is thrown when converting the type of `idxVal[i]` to
+			// the type of `colInfo`, the `idxVal` does not exist in the `idxInfo` for sure.
+			idxVals[i], err = table.CastValue(ctx, idxVals[i], colInfo, true, false)
+			if types.ErrOverflow.Equal(err) || types.ErrDataTooLong.Equal(err) ||
+				types.ErrTruncated.Equal(err) || types.ErrTruncatedWrongVal.Equal(err) {
+				return nil, kv.ErrNotExist
+>>>>>>> 284da110b... executor: fix cast function will ignore tht error for point-get key construction (#22869)
 			}
 		}
 		if err != nil {

executor/point_get_test.go

@@ -125,6 +125,25 @@ func (s *testPointGetSuite) TestPointGetOverflow(c *C) {
 	tk.MustQuery("SELECT t0.c1 FROM t0 WHERE t0.c1=127").Check(testkit.Rows("127"))
 }
 
+// Close issue #22839
+func (s *testPointGetSuite) TestPointGetDataTooLong(c *C) {
+	tk := testkit.NewTestKit(c, s.store)
+	tk.MustExec("use test")
+	tk.MustExec("drop table if exists PK_1389;")
+	tk.MustExec("CREATE TABLE `PK_1389` ( " +
+		"  `COL1` bit(1) NOT NULL," +
+		"  `COL2` varchar(20) DEFAULT NULL," +
+		"  `COL3` datetime DEFAULT NULL," +
+		"  `COL4` bigint(20) DEFAULT NULL," +
+		"  `COL5` float DEFAULT NULL," +
+		"  PRIMARY KEY (`COL1`)" +
+		");")
+	tk.MustExec("insert into PK_1389 values(0, \"皟钹糁泅埞礰喾皑杏灚暋蛨歜檈瓗跾咸滐梀揉\", \"7701-12-27 23:58:43\", 4806951672419474695, -1.55652e38);")
+	tk.MustQuery("select count(1) from PK_1389 where col1 = 0x30;").Check(testkit.Rows("0"))
+	tk.MustQuery("select count(1) from PK_1389 where col1 in ( 0x30);").Check(testkit.Rows("0"))
+	tk.MustExec("drop table if exists PK_1389;")
+}
+
 func (s *testPointGetSuite) TestPointGetCharPK(c *C) {
 	tk := testkit.NewTestKit(c, s.store)
 	tk.MustExec(`use test;`)

table/column.go

@@ -248,11 +248,15 @@ func handleZeroDatetime(ctx sessionctx.Context, col *model.ColumnInfo, casted ty
 // Set it to true only in FillVirtualColumnValue and UnionScanExec.Next()
 // If the handle of err is changed latter, the behavior of forceIgnoreTruncate also need to change.
 // TODO: change the third arg to TypeField. Not pass ColumnInfo.
-func CastValue(ctx sessionctx.Context, val types.Datum, col *model.ColumnInfo, returnOverflow, forceIgnoreTruncate bool) (casted types.Datum, err error) {
+func CastValue(ctx sessionctx.Context, val types.Datum, col *model.ColumnInfo, returnErr, forceIgnoreTruncate bool) (casted types.Datum, err error) {
 	sc := ctx.GetSessionVars().StmtCtx
 	casted, err = val.ConvertTo(sc, &col.FieldType)
 	// TODO: make sure all truncate errors are handled by ConvertTo.
+<<<<<<< HEAD
 	if types.ErrOverflow.Equal(err) && returnOverflow {
+=======
+	if returnErr && err != nil {
+>>>>>>> 284da110b... executor: fix cast function will ignore tht error for point-get key construction (#22869)
 		return casted, err
 	}
 	if err != nil && types.ErrTruncated.Equal(err) && col.Tp != mysql.TypeSet && col.Tp != mysql.TypeEnum {