Sqlalchemy with cx_Oracle query only returns one result

Question

I am trying to query an Oracle DB table from sqlalchemy with

session.query(PAY).filter_by(REGION_CODE=record['REGION_CODE'],
                             AOID=record['AOID'],
                             COMPANY_CODE=record['COMPANY_CODE']).all()

it returns 1 value, however if do a raw sql

select * from schema.table_name where REGION_CODE = '{record['REGION_CODE']}' 
and AOID = '{record['AOID']}' and COMPANY_CODE = '{record['COMPANY_CODE']}

The database has 2 records I get two results. The results have identical values but are 2 different records.

Any one have any idea why the query only returns the single value?

Answer 1

It is possible that SQLAlchemy is prepending a "distinct" clause to the query which will eliminate duplicate rows. You can find out for sure by setting the environment variable DPI_DEBUG_LEVEL to the value 16 before running the two examples. This will show the SQL statements that are being executed and you can confirm my suspicions!