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Posted to derby-dev@db.apache.org by "Satheesh Bandaram (JIRA)" <de...@db.apache.org> on 2005/05/04 23:49:05 UTC
[jira] Updated: (DERBY-217) issue with BLOBs and batch updates in 10.1.0.0
[ http://issues.apache.org/jira/browse/DERBY-217?page=all ]
Satheesh Bandaram updated DERBY-217:
------------------------------------
Component: JDBC
> 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: 10.1.0.0
> Environment: Win XP SP2
> Reporter: Gerald Khin
>
> 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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