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Bug with binding query parameters hangs entire connection instance. (Possib: msg#00187

db.postgresql.jdbc

Subject: Bug with binding query parameters hangs entire connection instance. (Possibly redundant notice)

Hello.
This may be an issue that you are all aware of, sorry for not digging through archives and such,
but I simply don't have the time.

Noting that support for CallableStatement is not yet implemented I elected to use
the following format for calling user defined SQL Functions and dynamically bind
parameters to them.

PreparedStatement procedure = conn.prepareStatement("select someFunction(?,?,?)");

and then binding params with
procedure.setObject(index, aStringOrIntegerOrSomeSuch);

which mostly works fine. However, I discovered that in some cases, when the bound
parameter is totatlly screwed, ie. Float when the function expects Integer, the
PostgreSQL jdbc driver will throw an exception:

java.sql.SQLException: ERROR: pg_atoi: error in "140.0": can't parse ".0"

which is fine and all, except that any subsequent statements made to the
connection instance in question will fail with:

java.sql.SQLException: The query returned no rows

which is not too great. For my application I made a workaround that
runs a query I know should work before every query to determine if
the connection instance is jammed and has to be re-instantiated...
This introduced surprisingly little overhead with a pre prepared statement,
but it is a kludgy annoyance nonetheless.

Any ideas or comments?

Summery greetings from Finland!
Peter Bäck

--
-=[ Peter Bäck +358-400-564050 ]=-
-=[ Oy IT Mill Ltd Ruukinkatu 2 - 4 ]=-
-=[ http://www.itmill.com 20540 Turku , Finland ]=-







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