Re: Oracle Functions to PostgreSQL

you're going to have alot of work as ANNOTATIONS and DATATYPES are different e.g.

--------------- Postgres function which calcs geo_distance
CREATE OR REPLACE FUNCTION geo_distance (point, point)
RETURNS float8
LANGUAGE 'C' IMMUTABLE STRICT AS '$libdir/earthdistance';

--Oracle has no clue what points or float8 might be so you'll have to convert to
--known Oracle Datatypes or packaged objects
NUMBER,VARCHAR2,CHAR,DATE,BLOB,CLOB

IMMUTABLE can be accomplished if you birth the functionality to a Java Class and add @Immutable
CREATE OR REPLACE PACKAGE Function_Container AS
FUNCTION JavaFunction
(AOracleDatatype IN VARCHAR2)
RETURN VARCHAR2
IS
LANGUAGE 'JAVA'
NAME 'package.ImmutableProjectToAccomplishAOracleFunction' (char[]) return char[]';
/

Here is the Java file
package package;
@Immutable
public class ImmutableProjectToAccomplishAOracleFunction { }
--STRICT is only available in Oracle11

Martin
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Date: Tue, 24 Feb 2009 04:46:30 -0800
From: abr_ora(at)yahoo(dot)com
Subject: [GENERAL] Oracle Functions to PostgreSQL
To: pgsql-general(at)postgresql(dot)org

Hi all,

Is there any preferably open source tool to convert Oracle Functions to PostgreSQL Functions.

Thanks,
Abdul Rehman.

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