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https://issues.apache.org/jira/browse/DERBY-1368?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12557188#action_12557188
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Kristian Waagan commented on DERBY-1368:
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I see the test has been committed ('derby-1368_diff2.txt'). Thanks for working
on it Kathey!
> EOFException when reading from blob's binary stream
> ---------------------------------------------------
>
> Key: DERBY-1368
> URL: https://issues.apache.org/jira/browse/DERBY-1368
> Project: Derby
> Issue Type: Bug
> Components: JDBC
> Affects Versions: 10.1.2.1
> Reporter: Tobias Bocanegra
> Fix For: 10.2.1.6
>
> Attachments: derby-1368_diff.txt, derby-1368_diff2.txt, Derby1368.java
>
>
> reading the 'length()' of a blob reads a previously aquired binary stream.
> test case:
> public static void main(String[] argv) throws Exception {
> String driver = "org.apache.derby.jdbc.EmbeddedDriver";
> String url = "jdbc:derby:derby/test;create=true";
> Class.forName(driver);
> Connection con = DriverManager.getConnection(url, "sa", "");
> con.setAutoCommit(true);
> // create table
> System.out.println("1) creating table...");
> Statement stmt = con.createStatement();
> stmt.execute("create table T1 (ID char(32) PRIMARY KEY, DATA blob(2G)
> not null)");
> stmt.close();
> // add row
> System.out.println("2) adding row...");
> byte[] data = new byte[1024*1024*1];
> data[0] = 1;
> data[1] = 2;
> PreparedStatement s = con.prepareStatement("insert into T1 (ID, DATA)
> values (?, ?)");
> s.setString(1, "id");
> s.setBytes(2, data);
> s.execute();
> s.close();
> // read row
> System.out.println("3) reading row...");
> s = con.prepareStatement("select DATA from T1 where ID = ?");
> s.setString(1, "id");
> s.execute();
> ResultSet rs = s.getResultSet();
> rs.next();
> Blob b = rs.getBlob(1);
> // test output
> System.out.println("4) Length: " + b.length());
> InputStream in = b.getBinaryStream();
> System.out.println(" First Byte: " + in.read());
> in.close();
> in = b.getBinaryStream();
> System.out.println("5) Length: " + b.length());
> System.out.println(" First Byte: " + in.read());
> in.close();
> rs.close();
> s.close();
> con.close();
> }
> gives:
> 1) creating table...
> 2) adding row...
> 3) reading row...
> 4) Length: 1048576
> First Byte: 1
> 5) Length: 1048576
> First Byte: -1
> imo, 5) is wrong.
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