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Re: Problems with Timestamp and Function Calls in JDBC/Prepared
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QAIX > PostgreSQL database development > Re: Problems with Timestamp and Function Calls in JDBC/Prepared 22 April 2006 00:16:46
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Re: Problems with Timestamp and Function Calls in JDBC/Prepared

Kris Jurka 22 April 2006 00:16:46
 

On Fri, 21 Apr 2006, tarabas@tarabas.de wrote:
I am having a bit trouble with function-calls containing timestamps.>
CREATE OR REPLACE FUNCTION do_something(int8, int8, int8, int8,> timestamptz, timestamptz, timestamptz, timestamptz, int8, timestamptz,> "varchar", int8, int8, "numeric", int8, int8)> RETURNS int8 AS>
When I now try to call the function through the JDBC 8.1-405 JDBC 3> with a prepared Statement I do this:>
ps.setDouble(14, param14);

I belive this line is actually your problem, not the timestamps. Your
function is declared to take numeric, so you should ps.setBigDecimal() to
get that type. setDouble implies a float8 type which does not work...

CREATE FUNCTION f(numeric) RETURNS int AS 'SELECT 1;' LANGUAGE sql;
SELECT f(1::float8);
ERROR: function f(double precision) does not exist

The odd thing is that when I do a setTimestamp() and the param is null,> the type timestamp seems to be used correctly (it is set to 1184). But> when the Timestamp is filled, the type is set to 0 in the prepared> statement.

When passing timestamp values to the server the JDBC driver must leave
them as an unresolved type because it does not know if it is a timestamp
or timestamptz. This is not an issue with a null value because in that
case the conversion between timestamp and timestamptz cannot alter the
value, so we can give the server a hint about the type involved.

Kris Jurka

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Guest 22 April 2006 00:16:46 [ permanent link ]
 Hi Kris,

you were right, it seems i was assuming that the Timestamps were the
problem because of the, from my side unexpected, behaviour.

Changing the setDouble to setBigDecimal worked fine for me.

Thanks a lot for the hint.

Manuel


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QAIX > PostgreSQL database development > Re: Problems with Timestamp and Function Calls in JDBC/Prepared 22 April 2006 00:16:46
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