Add to java mention of pl/j.

doc/TODO.detail/java

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+From pgsql-hackers-owner+M17140@postgresql.org Thu Jan  3 09:13:32 2002
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+Date: Tue, 01 Jan 2002 14:03:51 +0100
+From: Laszlo Hornyak <hornyakl@freemail.hu>
+Reply-To: hornyakl@users.sourceforge.net
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+To: pgsql-hackers@postgresql.org, ssutjiono@wc-group.com
+Subject: [HACKERS] PL/(pg)J
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+Status: OR
+
+Happy new year for all!
+
+I would like to tell you about the results of my work on pl/j.
+memo: Java and postgres must run in a separate address space. First I 
+wanted to use the sys v ipc, which was a bad idea becouse of some 
+problems with java VM-s. Many hackers told me about its bad sides, and 
+the good sides of the sockets, so I droped the whole code and started a 
+new one.
+
+I started to write the java side first, which is maybe almost 10% ready :))
+-we have is a communication protocol between the two process. I know 
+noone will like it, so there is an API for protocols, so it is plugable. 
+The current implementation is receiveing calls,sends exceptions, but 
+sending the results is not implemented yet.
+
+-the Postgres side is not yet done. It sends function calls without 
+arguments, it doesn`t receive sql queries, exceptions or results at all, 
+and there is no API for it, it is an uggly hardcoded thing.
+
+-there is no JDBC implementation, and I have never written JDBC driver, 
+so it may take for a while...
+
+But it says "hello world" :))
+
+Todo for me:
+
+-learn more about postgres, jdbc drivers, etc, etc
+-develop api for the postgres side of the communication.
+
+This will take for a good while becouse of other todos but I hope next 
+time I can tell you good news.
+
+thx,
+Laszlo Hornyak
+
+
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