So I tried following along with this.
1) created a file called *custfunc.py*
In it I placed this:
from sqlalchemy.sql import expression
from sqlalchemy.ext.compiler import compiles
from sqlalchemy.types import String
type = String()
name = 'stripctrl'
def stripctrl_default(element, compiler, **kw):
args = list(element.clauses)
return "%s" % (compiler
2) Imported class into my main code..
from custfunc import stripctrl
print(session.query( stripctrl(Jobdtl.jobdtl_cmd) ).first()
I think that's right
On Friday, 9 February 2018 20:05:59 UTC, Jonathan Vanasco wrote:
> I should have explained something above better...
> The result I assumed you wanted to achieve is "creating SQL that will
> handle data transformations". That would allow you to write concise python
> that will compiled into SQL which will be evaluated on the database
> server. You could also use other approaches that transform data in python
> before hitting the database server.
> IMHO, using a custom compiler approach is easier than trying to do
> something with `sqlalchemy.func` because it gives you more room to
> customize how the sql compiles under different databases.
The Python SQL Toolkit and Object Relational Mapper
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