Description:
I have an unsigned smallint(5) column that is being treated as signed by the JDBC driver. This results in an incorrect value of -32768 when selecting 32768.
I am using MySQL server version 4.1.11.
How to repeat:
1. Load the following data dump below.
2. Execute the following code:
Connection conn = MySQLDAOFactory.getConnection();
PreparedStatement stmt = conn
.prepareStatement( "SELECT method FROM bug GROUP BY method;" );
ResultSet rs = stmt.executeQuery();
while ( rs.next() ) {
System.out.println( rs.getInt( 1 ) );
}
conn.close();
The last value prints as -32768, when it should be 32768.
----------------BEGIN DATA DUMP:
-- MySQL dump 10.9
--
-- Host: localhost Database: zzz
-- ------------------------------------------------------
-- Server version 4.1.11
/*!40101 SET @OLD_CHARACTER_SET_CLIENT=@@CHARACTER_SET_CLIENT */;
/*!40101 SET @OLD_CHARACTER_SET_RESULTS=@@CHARACTER_SET_RESULTS */;
/*!40101 SET @OLD_COLLATION_CONNECTION=@@COLLATION_CONNECTION */;
/*!40101 SET NAMES utf8 */;
/*!40014 SET @OLD_UNIQUE_CHECKS=@@UNIQUE_CHECKS, UNIQUE_CHECKS=0 */;
/*!40014 SET @OLD_FOREIGN_KEY_CHECKS=@@FOREIGN_KEY_CHECKS, FOREIGN_KEY_CHECKS=0 */;
/*!40101 SET @OLD_SQL_MODE=@@SQL_MODE, SQL_MODE='NO_AUTO_VALUE_ON_ZERO' */;
/*!40111 SET @OLD_SQL_NOTES=@@SQL_NOTES, SQL_NOTES=0 */;
--
-- Table structure for table `bug`
--
DROP TABLE IF EXISTS `bug`;
CREATE TABLE `bug` (
`scoreId` mediumint(8) unsigned NOT NULL auto_increment,
`method` smallint(5) unsigned NOT NULL default '0',
PRIMARY KEY (`scoreId`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1;
--
-- Dumping data for table `bug`
--
/*!40000 ALTER TABLE `bug` DISABLE KEYS */;
LOCK TABLES `bug` WRITE;
INSERT INTO `bug` VALUES (1,32768),(8,512),(9,4096),(11,2048),(13,2),(15,256),(20,1),(21,1024),(39,16),(113,128),(131,16384),(233,32),(390,8192),(1118,8),(2759,64),(4678,4);
UNLOCK TABLES;
/*!40000 ALTER TABLE `bug` ENABLE KEYS */;
/*!40101 SET SQL_MODE=@OLD_SQL_MODE */;
/*!40014 SET FOREIGN_KEY_CHECKS=@OLD_FOREIGN_KEY_CHECKS */;
/*!40014 SET UNIQUE_CHECKS=@OLD_UNIQUE_CHECKS */;
/*!40101 SET CHARACTER_SET_CLIENT=@OLD_CHARACTER_SET_CLIENT */;
/*!40101 SET CHARACTER_SET_RESULTS=@OLD_CHARACTER_SET_RESULTS */;
/*!40101 SET COLLATION_CONNECTION=@OLD_COLLATION_CONNECTION */;
/*!40111 SET SQL_NOTES=@OLD_SQL_NOTES */;
---------------END DATA DUMP
Suggested fix:
Seems like a simple mixup between signed and unsigned.
Description: I have an unsigned smallint(5) column that is being treated as signed by the JDBC driver. This results in an incorrect value of -32768 when selecting 32768. I am using MySQL server version 4.1.11. How to repeat: 1. Load the following data dump below. 2. Execute the following code: Connection conn = MySQLDAOFactory.getConnection(); PreparedStatement stmt = conn .prepareStatement( "SELECT method FROM bug GROUP BY method;" ); ResultSet rs = stmt.executeQuery(); while ( rs.next() ) { System.out.println( rs.getInt( 1 ) ); } conn.close(); The last value prints as -32768, when it should be 32768. ----------------BEGIN DATA DUMP: -- MySQL dump 10.9 -- -- Host: localhost Database: zzz -- ------------------------------------------------------ -- Server version 4.1.11 /*!40101 SET @OLD_CHARACTER_SET_CLIENT=@@CHARACTER_SET_CLIENT */; /*!40101 SET @OLD_CHARACTER_SET_RESULTS=@@CHARACTER_SET_RESULTS */; /*!40101 SET @OLD_COLLATION_CONNECTION=@@COLLATION_CONNECTION */; /*!40101 SET NAMES utf8 */; /*!40014 SET @OLD_UNIQUE_CHECKS=@@UNIQUE_CHECKS, UNIQUE_CHECKS=0 */; /*!40014 SET @OLD_FOREIGN_KEY_CHECKS=@@FOREIGN_KEY_CHECKS, FOREIGN_KEY_CHECKS=0 */; /*!40101 SET @OLD_SQL_MODE=@@SQL_MODE, SQL_MODE='NO_AUTO_VALUE_ON_ZERO' */; /*!40111 SET @OLD_SQL_NOTES=@@SQL_NOTES, SQL_NOTES=0 */; -- -- Table structure for table `bug` -- DROP TABLE IF EXISTS `bug`; CREATE TABLE `bug` ( `scoreId` mediumint(8) unsigned NOT NULL auto_increment, `method` smallint(5) unsigned NOT NULL default '0', PRIMARY KEY (`scoreId`) ) ENGINE=MyISAM DEFAULT CHARSET=latin1; -- -- Dumping data for table `bug` -- /*!40000 ALTER TABLE `bug` DISABLE KEYS */; LOCK TABLES `bug` WRITE; INSERT INTO `bug` VALUES (1,32768),(8,512),(9,4096),(11,2048),(13,2),(15,256),(20,1),(21,1024),(39,16),(113,128),(131,16384),(233,32),(390,8192),(1118,8),(2759,64),(4678,4); UNLOCK TABLES; /*!40000 ALTER TABLE `bug` ENABLE KEYS */; /*!40101 SET SQL_MODE=@OLD_SQL_MODE */; /*!40014 SET FOREIGN_KEY_CHECKS=@OLD_FOREIGN_KEY_CHECKS */; /*!40014 SET UNIQUE_CHECKS=@OLD_UNIQUE_CHECKS */; /*!40101 SET CHARACTER_SET_CLIENT=@OLD_CHARACTER_SET_CLIENT */; /*!40101 SET CHARACTER_SET_RESULTS=@OLD_CHARACTER_SET_RESULTS */; /*!40101 SET COLLATION_CONNECTION=@OLD_COLLATION_CONNECTION */; /*!40111 SET SQL_NOTES=@OLD_SQL_NOTES */; ---------------END DATA DUMP Suggested fix: Seems like a simple mixup between signed and unsigned.