fix unsigned int overflow

Author: shiyuhang0

packets.go

@@ -827,15 +827,17 @@ func (rows *textRows) readRow(dest []driver.Value) error {
 				dest[i] = buf
 			}
 
-		case fieldTypeTiny, fieldTypeShort, fieldTypeInt24, fieldTypeYear, fieldTypeLong:
+		case fieldTypeTiny, fieldTypeShort, fieldTypeInt24, fieldTypeYear:
 			dest[i], err = strconv.ParseInt(string(buf), 10, 32)
 
-		//case fieldTypeLong:
-		//	if rows.rs.columns[i].flags&flagUnsigned != 0 {
-		//		dest[i], err = strconv.ParseUint(string(buf), 10, 32)
-		//	} else {
-		//		dest[i], err = strconv.ParseInt(string(buf), 10, 32)
-		//	}
+		case fieldTypeLong:
+			if rows.rs.columns[i].flags&flagUnsigned != 0 {
+				var d uint64
+				d, err = strconv.ParseUint(string(buf), 10, 32)
+				dest[i] = int64(d)
+			} else {
+				dest[i], err = strconv.ParseInt(string(buf), 10, 32)
+			}
 
 		case fieldTypeLongLong:
 			if rows.rs.columns[i].flags&flagUnsigned != 0 {