SQLAlchemy - 带有父查询参数的子查询

Question

I have the following SQL Statement that I want to convert to SQLAlchemy code:

SELECT job_type, requirement_type, val = IIF( 
  EXISTS (
    SELECT val
    FROM common.job_config_requirements jcr
    WHERE job_type = jcr.job_type
      AND requirement_type = jcr.requirement_type
  ),
  (
    SELECT COUNT(val)
    FROM common.job_config_requirements jcr
    WHERE jc.job_type = jcr.job_type
      AND jcrt.requirement_type = jcr.requirement_type
  ),
  0
)
FROM common.job_config jc
CROSS JOIN common.job_config_requirement_types jcrt;

I am using SQL Server and would like to know how I can pass the main queries arguments towards the subqueries.

Answer 1

Have you tried putting it in the text function?

I use the text function when I have large complicated queries.

from sqlalchemy import text

select_stm = text('''
    SELECT job_type, requirement_type, val = IIF( 
    EXISTS (
       SELECT val
       FROM common.job_config_requirements jcr
       WHERE job_type = jcr.job_type
       AND requirement_type = jcr.requirement_type
    ),
    (
       SELECT COUNT(val)
       FROM common.job_config_requirements jcr
       WHERE jc.job_type = jcr.job_type
       AND jcrt.requirement_type = jcr.requirement_type
    ),
    0
)
FROM common.job_config jc
CROSS JOIN common.job_config_requirement_types jcrt;
''')

conn.execute(select_stm)