On Mon, Mar 2, 2020, at 10:07 AM, Balukrishnan wrote:
> Hi friends,
>
> I am using some expressions in the select values itself like this.
>
>> data = select([testb.c.var1.op('&')(5)]).From(testb).execute()
>
> But the corresponding SQL generated is
>
>> SELECT (testb.var1 & $1) != $2 AS anon_1 FROM testb, Args: (1, 0)
>
> I can't label the column-like testb.c.var1.op('&')(5).label('Var'). Why this
> happening and how can I label that column with a valid name. Please help.
>
> also tried (but getting error),
> * data = select([testb.c.var1.op('&')(5).label('VAR')]).From(testb).execute()
the first example is correct, and assuming you use the correct method for the
froms "select_from", no error is generated:
from sqlalchemy import select, table, column
testb = table('testb', column('var1'))
stmt = select([testb.c.var1.op('&')(5).label('VAR')]).select_from(testb)
print(stmt)
SELECT testb.var1 & :var1_1 AS "VAR"
FROM testb
> * data = select([testb.c.var1.label('VAR').op('&')(5)]).From(testb).execute()
> * data = select([testb.c.var1.alias('VAR').op('&')(5)]).From(testb).execute()
> * data = select([testb.c.var1.op('&')(5).alias('VAR')]).From(testb).execute()
>
> --
> SQLAlchemy -
> The Python SQL Toolkit and Object Relational Mapper
>
> http://www.sqlalchemy.org/
>
> To post example code, please provide an MCVE: Minimal, Complete, and
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--
SQLAlchemy -
The Python SQL Toolkit and Object Relational Mapper
http://www.sqlalchemy.org/
To post example code, please provide an MCVE: Minimal, Complete, and Verifiable
Example. See http://stackoverflow.com/help/mcve for a full description.
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