> On Feb 21, 2022, at 9:50 AM, Mike Bayer <[email protected]> wrote:
>
> I thought 1.3 had "values", but if not, then you'd need to roll a recipe of
> some kind, the original recipe is at
> https://github.com/sqlalchemy/sqlalchemy/wiki/PGValues
Thanks. In 1.3 sqlalchemy.sql.expression.ValuesBase exists, but it inherits
from UpdateBase and is tied (AFAICT) to inserts and updates.
>
> On Mon, Feb 21, 2022, at 9:06 AM, Philip Semanchuk wrote:
>> 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 <[email protected]> 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
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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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--
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
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