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
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 <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
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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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