is it possible to do something like SELECT column1, column2 is null FROM table.. in DAL?

[Dragan Matic]

Postgresql allows this syntax:

SELECT column1, column2 is null FROM table WHERE...

Which returns the value from column one and a true/false for column2 like this:

column1      column2

value1          true

value2          false

To summarize, I just want for database to tell me whether column2 is null or not, I do not want to read the whole column2 and check it in program as it may contain a lot of text and will slow down execution. Can I translate this select to DAL?

[Massimiliano]

PyDal doen't implements is_null, but you can try something like that

t = db.yourtable

exp = "column2 is null"
print(db(t).select(t.column1, exp))

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Massimiliano