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postgresql calling a function on delete [message #1114098]

Sun, 22 September 2013 02:45

Eclipse User

Hi,

I created a function in postgresql and I want to run it when an entity is being deleted. I have to use customizer.

@Override
    public void customize(ClassDescriptor descriptor) throws Exception
    {
        descriptor.getQueryManager().setDeleteSQLString("select delete_recursive(#ID)");
    }

but when I execute this I get follow exception :

A result was returned when none was expected

my function is

CREATE OR REPLACE FUNCTION delete_recursive(docid bigint)
  RETURNS void AS

as you can see function output is VOID I think it's because the way of calling functions in postgresql which starts with select

how can i overcome this issue ?

is this a bug ?

Re: postgresql calling a function on delete [message #1114964 is a reply to message #1114098]

Mon, 23 September 2013 09:26

Eclipse User

You are specifying an SQL string which EclipseLink then tries to execute, which isn't the correct way of executing a stored procedure on Postgres. You should create a StoredProcedureCall, which EclipseLink will then form into SQL for the Postgres database if the app is configured to use the PostgreSQLPlatform:
http://wiki.eclipse.org/EclipseLink/Examples/JPA/CRUDStoredProcedures has an example.

Best Regards,
Chris

Re: postgresql calling a function on delete [message #1119158 is a reply to message #1114964]

Sat, 28 September 2013 01:33

Eclipse User

Thank you Chris,

But How can I pass dynamic argument value to StoredProcedureCall query ?

the given example uses static parameter value.

call.addArgument("P_F_NAME", ?);

Re: postgresql calling a function on delete [message #1121396 is a reply to message #1119158]

Mon, 30 September 2013 11:25

Eclipse User

The example did not show static values - it was defining which fields the parameter value would correspond to. The values get pulled from the objects used in the CRUD operations. So
call.addArgument("P_EMP_ID", "EMP_ID") causes the "P_EMP_ID" call parameter to get passed the value from the "EMP_ID" mapping within the entity.

Best Regards,
Chris

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