SQLAlchemy overrides the & operator:
https://docs.sqlalchemy.org/en/13/core/sqlelement.html#sqlalchemy.sql.expression.and_
You can use the "op" function to get at the postgres & operator:
https://docs.sqlalchemy.org/en/13/core/sqlelement.html#sqlalchemy.sql.expression.ColumnElement.op
Something like this:
select([testa.c.id.op("&")(15)])
Hope that helps,
Simon
On Tue, Feb 25, 2020 at 5:02 PM Balukrishnan <[email protected]> wrote:
>
> Table definition
>
> from sqlalchemy import *
> testa = Table(
> "testa",
> metadata,
> Column("id", BigInteger, primary_key=True),
> Column("str_var_a", String, nullable=True),
> Colmn("bool_var_a", Boolean, nullable=True),
> )
>
> and I need to execute a query like.
>
> select([testa.c.id & 15])
>
> But while executing this query getting an error
>
> Traceback (most recent call last):
> File
> "/Users/users_name/Projects/x_men/lib/python3.8/site-packages/sqlalchemy/sql/operators.py",
> line 81, in __and__
> return self.operate(and_, other)
> File
> "/Users/users_name/Projects/x_men/lib/python3.8/site-packages/sqlalchemy/sql/elements.py",
> line 731, in operate
> return op(self.comparator, *other, **kwargs)
> File
> "/Users/users_name/Projects/x_men/lib/python3.8/site-packages/sqlalchemy/sql/operators.py",
> line 81, in __and__
> return self.operate(and_, other)
> File "<string>", line 1, in <lambda>
> File
> "/Users/users_name/Projects/x_men/lib/python3.8/site-packages/sqlalchemy/sql/type_api.py",
> line 67, in operate
> return o[0](self.expr, op, *(other + o[1:]), **kwargs)
> File
> "/Users/users_name/Projects/x_men/lib/python3.8/site-packages/sqlalchemy/sql/default_comparator.py",
> line 147, in _conjunction_operate
> return and_(expr, other)
> File
> "/Users/users_name/Projects/x_men/lib/python3.8/site-packages/sqlalchemy/sql/elements.py",
> line 2098, in and_
> return cls._construct(operators.and_, True_, False_, *clauses)
> File
> "/Users/users_name/Projects/x_men/lib/python3.8/site-packages/sqlalchemy/sql/elements.py",
> line 2028, in _construct
> clauses = [
> File
> "/Users/users_name/Projects/x_men/lib/python3.8/site-packages/sqlalchemy/sql/elements.py",
> line 2029, in <listcomp>
> _expression_literal_as_text(clause)
> File
> "/Users/users_name/Projects/x_men/lib/python3.8/site-packages/sqlalchemy/sql/elements.py",
> line 4569, in _expression_literal_as_text
> return _literal_as_text(element)
> File
> "/Users/users_name/Projects/x_men/lib/python3.8/site-packages/sqlalchemy/sql/elements.py",
> line 4592, in _literal_as_text
> return _literal_as(element, _no_text_coercion)
> File
> "/Users/users_name/Projects/x_men/lib/python3.8/site-packages/sqlalchemy/sql/elements.py",
> line 4582, in _literal_as
> raise exc.ArgumentError(
> sqlalchemy.exc.ArgumentError: SQL expression object expected, got object of
> type <class 'int'> instead
>
> But in Postgres using psql command I can perform the query SELECT id & 15
> FROM testa;. Is there any support for this in sqlalchemy.
>
> --
> 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
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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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