[Zope] SQLFile-proposal

[Page Page]

Gang,
I have lifted some technology from SQLSession. Although it is
quite nifty, it has a few disadvantages I'd like to have fixed.

SQLSession uses ZSQL-Methods in the following way.
Each ZSQL-Method (i.e. SQL-expression) is assigned to a string:

_sql_ichi="""
SELECT * FROM ni WHERE ichi = <dtml-sqlvar ichi>
"""

Each string is used for the instantiation of a ZSQL-Method:

self.sqlIchi=SQL('sqlIchi',
    'fetch ichis',
    ''
    'ichi:int',
    _sql_ichi)

This code is placed in the __init__ of the instance that will use
the ZSQL-methods as methods. There is room for a few improvements.
0.) I don't like the typing overhead. 
1.) The ZSQL-methods are not updated automatically
2.) SQLSession provides an UI for editing the ZSQL-methods at runtime,
but this makes a mess, since all changes from a debugging-session
have to be duplicated in the code after debugging.

So: what about a file that declares and names each sql-statement and
gets loaded like a DTMLFile? The object instance that is supposed to
use the ZSQL-Methods as methods is passed as a parameter. The filename
could be pickled and reloaded every time there is a change:
    SQLFile.SQLFile(myFineInstance, 'dbConn', 'mySQLFile.sqf', reload=1)

Anything wrong with this approach? I have not found anything even close
to it. I would volunteer for writing it, but maybe I have missed something
that makes it problematic or useless.

Regards
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