Potential fix for code scanning alert no. 128: Incorrect conversion between integer types

Co-authored-by: Copilot Autofix powered by AI <62310815+github-advanced-security[bot]@users.noreply.github.com>

Author: joel-rieke

sql/expression/function/ceil_round_floor.go

@@ -261,7 +261,10 @@ func (r *Round) Eval(ctx *sql.Context, row sql.Row) (interface{}, error) {
 			case int8:
 				dVal = float64(dNum)
 			case uint64:
-				dVal = float64(dNum)
+				if dNum > math.MaxInt64 {
+					return nil, fmt.Errorf("value %d exceeds the maximum value for int64", dNum)
+				}
+				dVal = float64(int64(dNum))
 			case uint32:
 				dVal = float64(dNum)
 			case uint16: