I'm using Classic SQLAlchemy to create SQL statements, which are later 
formatted with sqlparse and stored in a file. I'm not executing the SQL 
through SQLAlchemy.


Some of the queries have complexities that would benefit from a comments. 
Is there any way to get SQLAlchemy to output a query like the following?


*-- Comment explaining the query*
SELECT foo,* -- comment explaining the convoluted case statement*
 CASE WHEN .. END as complicated_case,
* -- comment exaplaining the convoluted window function*
 ROW_NUMBER() OVER (PARTITION BY ..., ORDER BY ...) as complicated_row_num

FROM bar JOIN (
* -- Comment explaining subquery and join*
 SELECT ...
) WHERE 1=1*   -- comment explaining the purpose of the EXISTS clause*
   AND EXISTS (SELECT ...)

Reading through this user group, I saw a few posts related to comments and the 
ORM. The recommended solution was this link: 
https://bitbucket.org/zzzeek/sqlalchemy/wiki/UsageRecipes/SessionModifiedSQL

However for my use case, I am not executing any of the sql. I'm basically doing 
things like this:

sel = select([...])
sql = str(sel.compile(dialect=oracle.dialect(), 
compile_kwargs={'literal_binds': True})

with open(file_name, 'w') as f:
    f.write(sql) 

Thanks and best regards,

Matthew Moisen

-- 
SQLAlchemy - 
The Python SQL Toolkit and Object Relational Mapper

http://www.sqlalchemy.org/

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