Re: LargeObject API

On Thu, 2 Aug 2007, Dennis Thrysøe wrote:

> Is there any way to use the proprietary LargeObject API, without actually
> having a reference to the postgresql Drivers's Connection object?

Often connection wrappers provide a means to access the underlying
Connection.  You don't say what you're using so you'll have to consult
those docs yourself.

> Otherwise I could possibly use PreparedStatement.setBlob(), but how could I
> create a Blob instance?
>

JDBC4 provides a means for creating Blobs, but we haven't implemented that
yet, so the easiest way is to create a Blob is to get it from the
database:

stmt.execute("CREATE TABLE t (a int, b oid)");
stmt.execute("INSERT INTO t VALUES (1, lo_creat(-1))");
ResultSet rs = stmt.executeQuery("SELECT b FROM t WHERE a = 1");
rs.next();
Blob b = rs.getBlob(1);

Kris Jurka