Humair Mohammed <huma...@hotmail.com> writes:
> I am running into a behavior with a postgresql function with a SETOF
> refcursor's returning multiple columns. Not sure if there is a different way
> to retrieve a SETOF refcursor's with variable columns? Alternatively can I
> return a primitive value and a refcursor from the same function. I tried
> specifying this as OUT parameters without any luck. In Oracle you can pass
> this in functions:
> Platform:postgresql-x64-9.0 (PostgreSQL 9.0.1, compiled by Visual C++ build
> 1500, 64-bit)Java1.6JDBC4 Postgresql Driver, Version 9.0-801
> Function:CREATE OR REPLACE FUNCTION test() RETURNS SETOF refcursor
> AS$BODY$DECLAREref1 refcursor;ref2 refcursor;BEGIN OPEN ref1 FOR
> SELECT 1; RETURN NEXT ref1; OPEN ref2 FOR SELECT 2, 3;
> RETURN NEXT ref2; RETURN;END; $BODY$ LANGUAGE plpgsql
> Java Code:CallableStatement cs = conn.prepareCall("{ call test()
> }");ResultSet rs = cs.executeQuery();
> while (rs.next()) { System.out.println(rs.getString(1)); ResultSet rs2 =
> (ResultSet)rs.getObject(1); while (rs2.next()) {
> ResultSetMetaData rsmd = rs2.getMetaData(); int numberOfColumns =
> rsmd.getColumnCount(); System.out.println("numberOfColumns: " +
> numberOfColumns); System.out.println(rs2.getString(1));
> System.out.println(rs2.getString(2)); }}
> Output:<unnamed portal 1>numberOfColumns:
> 11org.postgresql.util.PSQLException: The column index is out of range: 2,
> number of columns: 1. at
> org.postgresql.jdbc2.AbstractJdbc2ResultSet.checkColumnIndex(AbstractJdbc2ResultSet.java:2680)
> at
> org.postgresql.jdbc2.AbstractJdbc2ResultSet.checkResultSet(AbstractJdbc2ResultSet.java:2697)
> at
> org.postgresql.jdbc2.AbstractJdbc2ResultSet.getString(AbstractJdbc2ResultSet.java:1872)
> at PgBlob.test(PgBlob.java:64) at PgBlob.main(PgBlob.java:37)
> It appears the second result-set takes in the number of columns from the
> first irrespective of the number of columns from the second. If the change
> the function to return 2 refcursor's with same number of columns then it
> works as expected.
> Function:CREATE OR REPLACE FUNCTION test() RETURNS SETOF refcursor
> AS$BODY$DECLAREref1 refcursor;ref2 refcursor;BEGIN OPEN ref1 FOR
> SELECT 1, null; RETURN NEXT ref1; OPEN ref2 FOR SELECT 2, 3;
> RETURN NEXT ref2; RETURN;END; $BODY$ LANGUAGE plpgsql
> Output:<unnamed portal 1>numberOfColumns: 214<unnamed portal
> 2>numberOfColumns: 223
The example function works okay for me in psql. I think this is
actually a question about how to deal with such cases through the JDBC
driver, so I'd suggest asking on the pgsql-jdbc list. (Perhaps in a
less messy format this time, and could we ask for a useful Subject:
line too?)
regards, tom lane
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