diff --git a/expression/builtin_cast.go b/expression/builtin_cast.go
index 4c16f1b6b2b96..302e72e2140e4 100644
--- a/expression/builtin_cast.go
+++ b/expression/builtin_cast.go
@@ -746,6 +746,10 @@ func (b *builtinCastRealAsIntSig) evalInt(row chunk.Row) (res int64, isNull bool
 		uintVal, err = types.ConvertFloatToUint(sc, val, types.IntergerUnsignedUpperBound(mysql.TypeLonglong), mysql.TypeLonglong)
 		res = int64(uintVal)
 	}
+	err = b.ctx.GetSessionVars().StmtCtx.HandleOverflow(err, err)
+	if err != nil {
+		return res, false, err
+	}
 	return res, isNull, err
 }
 
diff --git a/expression/builtin_cast_vec.go b/expression/builtin_cast_vec.go
index a524d1c6d7bde..f7157051bc57e 100644
--- a/expression/builtin_cast_vec.go
+++ b/expression/builtin_cast_vec.go
@@ -500,7 +500,7 @@ func (b *builtinCastRealAsIntSig) vecEvalInt(input *chunk.Chunk, result *chunk.C
 			uintVal, err = types.ConvertFloatToUint(sc, f64s[i], types.IntergerUnsignedUpperBound(mysql.TypeLonglong), mysql.TypeLonglong)
 			i64s[i] = int64(uintVal)
 		}
-
+		err = b.ctx.GetSessionVars().StmtCtx.HandleOverflow(err, err)
 		if err != nil {
 			return err
 		}
diff --git a/expression/integration_test.go b/expression/integration_test.go
index 91301e35ca9b7..e07c4f47fee6a 100755
--- a/expression/integration_test.go
+++ b/expression/integration_test.go
@@ -2232,6 +2232,13 @@ func (s *testIntegrationSuite2) TestBuiltin(c *C) {
 	c.Assert(last, Equals, "bigint")
 	tk.MustExec(`drop table tb5;`)
 
+	tk.MustExec(`create table tb5(a double(64));`)
+	tk.MustExec(`insert into test.tb5 (a) values (18446744073709551616);`)
+	tk.MustExec(`insert into test.tb5 (a) values (184467440737095516160);`)
+	result = tk.MustQuery(`select cast(a as unsigned) from test.tb5;`)
+	result.Check(testkit.Rows("9223372036854775807", "9223372036854775807"))
+	tk.MustExec(`drop table tb5`)
+
 	// test builtinCastIntAsDecimalSig
 	tk.MustExec(`create table tb5(a bigint(64) unsigned, b decimal(64, 10));`)
 	tk.MustExec(`insert into tb5 (a, b) values (9223372036854775808, 9223372036854775808);`)
diff --git a/types/convert.go b/types/convert.go
index db9c9dfdb5a4a..f3d841113d736 100644
--- a/types/convert.go
+++ b/types/convert.go
@@ -168,8 +168,12 @@ func ConvertFloatToUint(sc *stmtctx.StatementContext, fval float64, upperBound u
 		return uint64(int64(val)), overflow(val, tp)
 	}
 
-	if val > float64(upperBound) {
-		return upperBound, overflow(val, tp)
+	ubf := float64(upperBound)
+	if val == ubf {
+		return uint64(math.MaxInt64), nil
+	}
+	if val > ubf {
+		return uint64(math.MaxInt64), overflow(val, tp)
 	}
 	return uint64(val), nil
 }
diff --git a/types/convert_test.go b/types/convert_test.go
index e97cfa96d0e2a..f88defda557be 100644
--- a/types/convert_test.go
+++ b/types/convert_test.go
@@ -615,7 +615,7 @@ func (s *testTypeConvertSuite) TestConvert(c *C) {
 	unsignedAccept(c, mysql.TypeLonglong, -1, "18446744073709551615")
 	unsignedAccept(c, mysql.TypeLonglong, 0, "0")
 	unsignedAccept(c, mysql.TypeLonglong, uint64(math.MaxUint64), strvalue(uint64(math.MaxUint64)))
-	unsignedDeny(c, mysql.TypeLonglong, math.MaxUint64*1.1, strvalue(uint64(math.MaxUint64)))
+	unsignedDeny(c, mysql.TypeLonglong, math.MaxUint64*1.1, strvalue(uint64(math.MaxInt64)))
 
 	// integer from string
 	signedAccept(c, mysql.TypeLong, "	  234  ", "234")