Using python cx_Oracle, how do I call DBMS_METADATA.SET_TRANSFORM_PARAM, which has multiple declarations?

Question

Here's the call and error I currently receive:

cursor.callproc('DBMS_METADATA.SET_TRANSFORM_PARAM', ['DBMS_METADATA.SESSION_TRANSFORM', 'STORAGE', 'false'])
cx_Oracle.DatabaseError: ORA-06550: line 1, column 7:
PLS-00307: too many declarations of 'SET_TRANSFORM_PARAM' match this call
ORA-06550: line 1, column 7:
PL/SQL: Statement ignored

Answer 1

The issue is related to the use of quotations. The syntax for the procedure DBMS_METADATA.SET_TRANSFORM_PARAM

DBMS_METADATA.SET_TRANSFORM_PARAM (
   transform_handle   IN NUMBER,
   name               IN VARCHAR2,
   value              IN VARCHAR2|IN BOOLEAN DEFAULT TRUE|IN NUMBER, 
   object_type        IN VARCHAR2 DEFAULT NULL);

the last parameter( object_type ) needn't to be specified obviously, since it has NULL value as default.

the penultimate parameter( value ) might have three options for data type. Seems that is intended to be as BOOLEAN . So, remove quotes around false .

lastly, the first parameter( transform_handle ) is also considered as numeric. So, remove quotes here too.

As a result, call the procedure as

cursor.callproc('DBMS_METADATA.SET_TRANSFORM_PARAM', 
                [DBMS_METADATA.SESSION_TRANSFORM, 'STORAGE', false]);