db-derby-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Kathey Marsden (JIRA)" <j...@apache.org>
Subject [jira] Updated: (DERBY-1368) EOFException when reading from blob's binary stream
Date Fri, 14 Dec 2007 21:34:43 GMT

     [ https://issues.apache.org/jira/browse/DERBY-1368?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Kathey Marsden updated DERBY-1368:
----------------------------------

    Attachment: derby-1368_diff.txt

Attaching a test for this issue. I added it into the JDBC4 tests so that we could test with
lengthless overrides, since Dan had indicated that that might be a problem, but all seems
to work fine.

It also works fine calling getBinaryStream twice on the Blob as in the repro.  That also works
fine with the patch for DERBY-2892.  





> 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
>            Assignee: Kathey Marsden
>         Attachments: derby-1368_diff.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.

-- 
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.


Mime
View raw message