Re: Large Objects - Mailing list pgsql-jdbc

You probably need to add a conn.commit(); statement after the
executeUpdate.

Philip

On Fri, 27 Jul 2001, Daniel Fisher wrote:

> I'm am attempting to make one of my Java servlets work with both MySQL & Postgres.
> I'm having some trouble inserting a large object into the database.
> I'm fairly certain that the problem is in my java code because I wrote some quick PHP code and it worked fine.
> The main problem is I'm not getting any errors, so I'm kinda stumped.
> The code appears to run fine, but nothing is being inserted into the database.
> Any help would be appreciated.
>
> ----- Here is my Java source -----
>
>     // getConnection gives me a database connection
>     // image is a byte[] passed to this function
>
>     Connection conn = null;
>     PreparedStatement pstmt = null;
>
>     try {
>
>       conn = getConnection();
>       conn.setAutoCommit(false);
>       pstmt = conn.prepareStatement("INSERT INTO dfisher (image) VALUES (?)");
>       pstmt.setBytes(1, image);
>       pstmt.executeUpdate();
>
>     } catch (Exception e) {
>       e.printStackTrace();
>     }
>     finally {
>       try { if (pstmt != null) pstmt.close(); } catch (Exception e) { e.printStackTrace(); }
>       try { if (conn != null) conn.close(); } catch (Exception e) { e.printStackTrace(); }
>     }
>   }
>
>
> ----- Here is my Postgres log -----
>
> /usr/local/bin/postmaster: BackendStartup: pid 54277 user dfisher db dfisher socket 8
> FindExec: found "/usr/local/bin/postgres" using argv[0]
> 2001-07-27 11:51:35 [54277]  DEBUG:  connection: host=127.0.0.1 user=dfisher database=dfisher
> 2001-07-27 11:51:35 [54277]  DEBUG:  StartTransactionCommand
> 2001-07-27 11:51:35 [54277]  DEBUG:  query: set datestyle to 'ISO'; select getdatabaseencoding()
> 2001-07-27 11:51:35 [54277]  DEBUG:  ProcessUtility: set datestyle to 'ISO'; select getdatabaseencoding()
> 2001-07-27 11:51:35 [54277]  DEBUG:  CommitTransactionCommand
> 2001-07-27 11:51:35 [54277]  DEBUG:  StartTransactionCommand
> 2001-07-27 11:51:35 [54277]  DEBUG:  query: begin
> 2001-07-27 11:51:35 [54277]  DEBUG:  ProcessUtility: begin
> 2001-07-27 11:51:35 [54277]  DEBUG:  CommitTransactionCommand
> 2001-07-27 11:51:35 [54277]  DEBUG:  StartTransactionCommand
> 2001-07-27 11:51:35 [54277]  DEBUG:  query: SET TRANSACTION ISOLATION LEVEL READ COMMITTED
> 2001-07-27 11:51:35 [54277]  DEBUG:  ProcessUtility: SET TRANSACTION ISOLATION LEVEL READ COMMITTED
> 2001-07-27 11:51:35 [54277]  DEBUG:  CommitTransactionCommand
> 2001-07-27 11:51:35 [54277]  DEBUG:  StartTransactionCommand
> 2001-07-27 11:51:35 [54277]  DEBUG:  query: select proname, oid from pg_proc where proname = 'lo_open'    or proname
='lo_close'    or proname = 'lo_creat'    or proname = 'lo_unlink'    or proname = 'lo_lseek'    or proname = 'lo_tell'
  or proname = 'loread' 
>   or proname = 'lowrite'
> 2001-07-27 11:51:35 [54277]  DEBUG:  CommitTransactionCommand
> 2001-07-27 11:51:35 [54277]  DEBUG:  StartTransactionCommand
> 2001-07-27 11:51:35 [54277]  DEBUG:  CommitTransactionCommand
> 2001-07-27 11:51:35 [54277]  DEBUG:  StartTransactionCommand
> 2001-07-27 11:51:35 [54277]  DEBUG:  CommitTransactionCommand
> 2001-07-27 11:51:35 [54277]  DEBUG:  StartTransactionCommand
> 2001-07-27 11:51:35 [54277]  DEBUG:  CommitTransactionCommand
> 2001-07-27 11:51:35 [54277]  DEBUG:  StartTransactionCommand
> 2001-07-27 11:51:35 [54277]  DEBUG:  CommitTransactionCommand
> 2001-07-27 11:51:35 [54277]  DEBUG:  StartTransactionCommand
> 2001-07-27 11:51:35 [54277]  DEBUG:  query: INSERT INTO dfisher (image) VALUES (19291)
> 2001-07-27 11:51:35 [54277]  DEBUG:  CommitTransactionCommand
> /usr/local/bin/postmaster: reaping dead processes...
> /usr/local/bin/postmaster: CleanupProc: pid 54277 exited with status 0
>
> ----- Here is my JServ log -----
>
> DriverManager.getConnection("jdbc:postgresql://localhost:5432/dfisher?user=dfisher&password=dfisher")
>     trying driver[className=org.postgresql.Driver,org.postgresql.Driver@e08d1172]
> getConnection returning driver[className=org.postgresql.Driver,org.postgresql.Driver@e08d1172]
> Large Object initialised
>
>
> --
> Daniel Fisher
>
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------------------------------------------------------------------------
Philip Crotwell   (803)777-0955  (803)777-0906 fax  crotwell@seis.sc.edu
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