[Pljava-dev] Function Error

I'm trying to import a function in Java, but am having problems with it. The java function is

public static double chi2cdf (double x)
{
return chi.cdf(x);
}

I copied the sim.class file to the Postgres data directory and I added it to Postgres with the following
select sqlj.replace_jar('file:///D:/workspace/SimplePrediction/sim.jar','sim',true);

SELECT sqlj.set_classpath('public', 'sim');

CREATE OR REPLACE FUNCTION sim.chi2cdf(double precision)
RETURNS double precision
AS 'simpleMonteCarlo.sim.chi2cdf'
LANGUAGE java;

When I try to run it, I get the following error:
ERROR: Unable to find static method simpleMonteCarlo.sim.chi2cdf with signature (D)D

I thought it was the signature of double precision, but then tried it with two other functions, one a float and one a int and get similar errors. Does anyone have any ideas?

Thank you,
Susan

I believe the problem is the classpath. You are putting the jar in the
public schema but your function is in the sim schema. Try this:

select sqlj.remove_jar('sim', true);
select * from
sqlj.install_jar('file:///D:/workspace/SimplePrediction/sim.jar','sim_ja
r',true);
select sqlj.set_classpath('sim', 'sim_jar');

CREATE OR REPLACE FUNCTION sim.chi2cdf(double precision)
RETURNS double precision
AS 'simpleMonteCarlo.sim.chi2cdf'
LANGUAGE java;

If that isn't it, try changing the Java method to return a
java.lang.String and then have your PostgreSQL function return a
character varying. That will eliminate the possibility of a signature
problem.

Jon

-----Original Message-----
From: pljava-dev-bounces at pgfoundry.org
[mailto:pljava-dev-bounces at pgfoundry.org] On Behalf Of Susan M Farley
Sent: Wednesday, March 24, 2010 10:34 AM
To: pljava-dev at pgfoundry.org
Subject: [Pljava-dev] Function Error

I'm trying to import a function in Java, but am having problems with it.
The java function is

public static double chi2cdf (double x)
{
return chi.cdf(x);
}

I copied the sim.class file to the Postgres data directory and I added
it to Postgres with the following
select
sqlj.replace_jar('file:///D:/workspace/SimplePrediction/sim.jar','sim',t
rue);

SELECT sqlj.set_classpath('public', 'sim');

CREATE OR REPLACE FUNCTION sim.chi2cdf(double precision)
RETURNS double precision
AS 'simpleMonteCarlo.sim.chi2cdf'
LANGUAGE java;

When I try to run it, I get the following error:
ERROR: Unable to find static method simpleMonteCarlo.sim.chi2cdf with
signature (D)D

I thought it was the signature of double precision, but then tried it
with two other functions, one a float and one a int and get similar
errors. Does anyone have any ideas?

Thank you,
Susan

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On 24/03/10 16:01, Roberts, Jon wrote:
> I believe the problem is the classpath. You are putting the jar in the
> public schema but your function is in the sim schema. Try this:
>
> select sqlj.remove_jar('sim', true);
> select * from
> sqlj.install_jar('file:///D:/workspace/SimplePrediction/sim.jar','sim_ja
> r',true);
> select sqlj.set_classpath('sim', 'sim_jar');
>
> CREATE OR REPLACE FUNCTION sim.chi2cdf(double precision)
> RETURNS double precision
> AS 'simpleMonteCarlo.sim.chi2cdf'
> LANGUAGE java;
>
> If that isn't it, try changing the Java method to return a
> java.lang.String and then have your PostgreSQL function return a
> character varying. That will eliminate the possibility of a signature
> problem.
>
>
> Jon
>
> -----Original Message-----
> From: pljava-dev-bounces at pgfoundry.org
> [mailto:pljava-dev-bounces at pgfoundry.org] On Behalf Of Susan M Farley
> Sent: Wednesday, March 24, 2010 10:34 AM
> To: pljava-dev at pgfoundry.org
> Subject: [Pljava-dev] Function Error
>
> I'm trying to import a function in Java, but am having problems with it.
> The java function is
>
> public static double chi2cdf (double x)
> {
> return chi.cdf(x);
> }
>
> I copied the sim.class file to the Postgres data directory and I added
> it to Postgres with the following
> select
> sqlj.replace_jar('file:///D:/workspace/SimplePrediction/sim.jar','sim',t
> rue);
>
> SELECT sqlj.set_classpath('public', 'sim');
>
> CREATE OR REPLACE FUNCTION sim.chi2cdf(double precision)
> RETURNS double precision
> AS 'simpleMonteCarlo.sim.chi2cdf'
> LANGUAGE java;
>
> When I try to run it, I get the following error:
> ERROR: Unable to find static method simpleMonteCarlo.sim.chi2cdf with
> signature (D)D
>
> I thought it was the signature of double precision, but then tried it
> with two other functions, one a float and one a int and get similar
> errors. Does anyone have any ideas?
>
> Thank you,
> Susan
>

Or possibly the file itself - you said that you "copied the sim.class
file" - should you not have put a .jar file instead?

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