JDBC2 Array Patch (New feature)

Hello...

This is my first contribution for Postgresql, so I hope its
found the proper home.

The patch adds Array support to the JDBC2 library (to myknowledge
Arrays aren't part of JDBC 1.0(?)).  Specifically you can now use
the ResultSet.getArray() method to return an java.sql.Array object.
Its a really convenient way to load up a Java array with one
columns' worth of results.

It is mostly implemented, except for a few less common data types
that I wasn't sure how to correctly pack into the tuples.  The
JDBC Array method variants that use type Map objects are likewise
unsupported because the corresponding code in ResultSet has yet
to be enabled.  Other than that its all there.

The patch is for the 7.1.2 "latest" build.  I tried building the
snapshot build but for some reason it wouldn't compile for me,
so the "latest" was the best available.

To apply the patch:

 > cd to <postgresql_src_dir>/src/interfaces/jdbc/org/postgresql
 > patch -p1 < /PATH_TO_PATCH_FILE/patch.txt
 > cd ../..
 > ant

This will build the new postgresql.jar in the jars directory.
Please forward any comments to gzoller@hotmail.com.

Thanks
Greg Zoller

ps.  I would be very grateful if the owner/maintainer of the
JDBC interface would fire off a short email to tell me if my
Array code is worthy of inclusion in the next Postgresql
release!

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