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From "Satheesh Bandaram (JIRA)" <derby-...@db.apache.org>
Subject [jira] Commented: (DERBY-217) issue with BLOBs and batch updates in 10.1.0.0
Date Sat, 09 Jul 2005 01:25:10 GMT
    [ http://issues.apache.org/jira/browse/DERBY-217?page=comments#action_12315369 ] 

Satheesh Bandaram commented on DERBY-217:
-----------------------------------------

Dan, this BLOCKER defect has been RESOLVED for sometime, but I kept it open pending a test
case addition. You had mentioned you would be adding a test case. Let me know when that is
done and that it works as expected, so I can close this bug.

> issue with BLOBs and batch updates in 10.1.0.0
> ----------------------------------------------
>
>          Key: DERBY-217
>          URL: http://issues.apache.org/jira/browse/DERBY-217
>      Project: Derby
>         Type: Bug
>   Components: JDBC
>     Versions: 10.1.1.0
>  Environment: Win XP SP2
>     Reporter: Gerald Khin
>     Assignee: Satheesh Bandaram
>     Priority: Blocker
>      Fix For: 10.1.1.0
>  Attachments: Derby-217.txt
>
> A batch update statement containing an insert statement with a BLOB value inserts a null
BLOB. Here ist the output of sysinfo: 
> ------------------ Java Information ------------------
> Java Version:    1.4.2_04
> Java Vendor:     Sun Microsystems Inc.
> Java home:       C:\Programme\Java\j2re1.4.2_04
> Java classpath:  U:\derby\trunk\jars\sane\derby.jar
> OS name:         Windows XP
> OS architecture: x86
> OS version:      5.1
> Java user name:  gk
> Java user home:  C:\Dokumente und Einstellungen\gk
> Java user dir:   C:\
> java.specification.name: Java Platform API Specification
> java.specification.version: 1.4
> --------- Derby Information --------
> JRE - JDBC: J2SE 1.4.2 - JDBC 3.0
> [U:\derby\trunk\jars\sane\derby.jar] 10.1.0.0 alpha - (160290)
> And here is a test program to reproduce the isssue:
> import java.sql.Connection;
> import java.sql.DriverManager;
> import java.sql.PreparedStatement;
> import java.sql.ResultSet;
> import java.sql.SQLException;
> public class DerbyBlobIssueRepro {
>     public static void main(String[] args) {
>         System.setProperty("derby.system.home", "C:\\temp\\");
>         
>         try {
>             Class.forName("org.apache.derby.jdbc.EmbeddedDriver");
>         }
>         catch(ClassNotFoundException e) {
>             e.printStackTrace();
>             System.exit(1);
>         }
>         PreparedStatement stmtBatchInsert = null; 
>             
>         try {
>             final Connection conn = getConnection();
>             
>             createOrRecreateTable(conn);
>             
>             stmtBatchInsert = getPreparedInsertRowWithBlobStmt(conn);
>             
>             insertRowWithBlob(stmtBatchInsert, 100);
> //            insertRowWithBlob(stmtBatchInsert, 200);
>             
>             stmtBatchInsert.executeBatch();
>             conn.commit();
>             
>             checkBlobLen(conn);
>             
>             conn.commit();
>             
>             conn.close();
>         }
>         catch(SQLException e) {
>             e.printStackTrace();
>             System.exit(1);
>         }
>         finally {
>             if (stmtBatchInsert != null) { try { stmtBatchInsert.close(); } catch (SQLException
e) {} }
>         }
>         System.exit(0);
>     }
>     private static void createOrRecreateTable(Connection p_conn) throws SQLException
{
>         try {
>             dropTable(p_conn);
>         }
>         catch(SQLException e) {
>             if (!e.getSQLState().equals("42Y07")) {
>                 e.printStackTrace();
>             }
>         }
>         
>         createTable(p_conn);
>     }
>     
>     private static void dropTable(Connection p_conn) throws SQLException {
>         PreparedStatement stmt = null;
>         try {
>             stmt = p_conn.prepareStatement("DROP TABLE test.blobtest");
>             stmt.executeUpdate();
>         }
>         finally {
>             if (stmt != null) { try { stmt.close(); } catch (SQLException e) {} }
>         }
>     }
>     
>     private static void createTable(Connection p_conn) throws SQLException {
>         PreparedStatement stmt = null;
>         try {
>             stmt = p_conn.prepareStatement("CREATE TABLE test.blobtest(len INTEGER, bval
BLOB(10M))");
>             stmt.executeUpdate();
>         }
>         finally {
>             if (stmt != null) { try { stmt.close(); } catch (SQLException e) {} }
>         }
>     }
>     
>     
>     private static void insertRowWithBlob(PreparedStatement p_stmtInsert, int p_nLen)
throws SQLException {
>         p_stmtInsert.setInt(1, p_nLen);
>         p_stmtInsert.setBytes(2, new byte[p_nLen]);
>         p_stmtInsert.addBatch();
>     }
>     
>     private static PreparedStatement getPreparedInsertRowWithBlobStmt(Connection p_conn)
throws SQLException {
>         return p_conn.prepareStatement("INSERT INTO test.blobtest(len,bval) VALUES (?,?)");
>     }
>     
>     
>     private static void checkBlobLen(Connection p_conn) throws SQLException {
>         PreparedStatement stmtQuery = null;
>         ResultSet rs = null;
>         try {
>             // try ter update the row, may be there is no row to update
>             stmtQuery = p_conn.prepareStatement("SELECT len, bval from test.blobtest");
>             
>             rs = stmtQuery.executeQuery();
>             
>             while(rs.next()) {
>                 final int nLen = rs.getInt(1);
>                 final byte[] arBytes = rs.getBytes(2);
>                 
>                 if (rs.wasNull()) {
>                     System.out.println("unexpected null blob");
>                 }
>                 else if (nLen != arBytes.length) {
>                     System.out.println("unexpected number of bytes, expected: " + nLen
+ ", was: " + arBytes.length);
>                 }
>             }
>         }
>         finally {
>             if (rs != null) { try { rs.close(); } catch (SQLException e) {} }
>             if (stmtQuery != null) { try { stmtQuery.close(); } catch (SQLException e)
{} }
>         }
>     }
>     
>     private static Connection getConnection() throws SQLException {
>         final Connection conn = DriverManager.getConnection("jdbc:derby:derbyblobdb;create=true",
"test", "test");
>         conn.setAutoCommit(false);
>         return conn;
>     }
>     
> }

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