Thanks! It looks like 1.4 is required for this, correct? Any way to do this
under 1.3?
> On Feb 20, 2022, at 8:17 PM, Mike Bayer <mike...@zzzcomputing.com> wrote:
>
> the Values construct doesn't have CTE direct support right now so you need to
> make a subquery first, then CTE from that
>
> from sqlalchemy import Column
> from sqlalchemy import column
> from sqlalchemy import Integer
> from sqlalchemy import select
> from sqlalchemy import String
> from sqlalchemy import values
> from sqlalchemy.ext.declarative import declarative_base
> from sqlalchemy.orm import declarative_base
>
> Base = declarative_base()
>
>
> class A(Base):
> __tablename__ = "my_table"
>
> id = Column(Integer, primary_key=True)
> name = Column(String)
>
>
> v1 = select(
> values(
> column("name", Integer), column("color", String), name="my_values"
> ).data([("Lancelot", "blue"), ("Galahad", "blue. no, yellow")])
> ).cte()
>
>
> stmt = select(A, v1.c.color).join_from(A, v1, A.name == v1.c.name)
> print(stmt)
>
>
>
>
> On Thu, Feb 17, 2022, at 1:00 PM, Philip Semanchuk wrote:
>> Hi,
>> I'm trying to use a VALUES statement in a CTE, and I can't figure out the
>> correct SQLAlchemy constructs to make this happen. I'd appreciate any help.
>> Here's the SQL I'd like to express in SQLAlchemy --
>>
>> WITH knights(name, favorite_color) AS (
>> VALUES
>> ('Lancelot', 'blue'),
>> ('Galahad', 'blue. no, yellow')
>> ),
>> SELECT my_table.*, favorite_color
>> FROM my_table
>> JOIN knights USING (name)
>>
>> Ideally, I would like to be able to express this as a Query that I can later
>> execute or pass to an insert().from_select(columns, my_query).
>>
>> The backend is Postgres 11, and our SQLAlchemy version is 1.3.
>>
>> Thanks
>> Philip
>>
>> --
>> 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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>>
>
>
> --
> 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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--
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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