Open up if_(not_)?exists to SQLAlchemy 1.4+

[zrotceh]

Fixes #1323

Description

As the title describes, open up if_(not_)?exists support (both implementations and tests) to SQLAlchemy 1.4+

Checklist

This pull request is:

• A documentation / typographical error fix
  • Good to go, no issue or tests are needed
• A short code fix
  • please include the issue number, and create an issue if none exists, which
    must include a complete example of the issue. one line code fixes without an
    issue and demonstration will not be accepted.
  • Please include: Fixes: #<issue number> in the commit message
  • please include tests. one line code fixes without tests will not be accepted.
• A new feature implementation
  • please include the issue number, and create an issue if none exists, which must
    include a complete example of how the feature would look.
  • Please include: Fixes: #<issue number> in the commit message
  • please include tests.

[zzzeek]

@CaselIT looks like 1.4.0b2 had the "if (not) exists" constructs, why were these gated on SQLAlchemy 2?

[CaselIT]

not sure, if they are in the 1.4 beta then it's probably just an error

[CaselIT]

ah the reason is the they were added to alembic following this issue for v2 sqlalchemy/sqlalchemy#7354, but some of the exists were already present

[sqla-tester]

OK, this is sqla-tester setting up my work on behalf of CaselIT to try to get revision c678a31 of this pull request into gerrit so we can run tests and reviews and stuff

[sqla-tester]

New Gerrit review created for change c678a31: https://gerrit.sqlalchemy.org/c/sqlalchemy/alembic/+/4974

[sqla-tester]

mike bayer (zzzeek) wrote:

can we get a changelog for this? thanks

View this in Gerrit at https://gerrit.sqlalchemy.org/c/sqlalchemy/alembic/+/4974

[CaselIT]

will add

[CaselIT]

updated on gerrit

[sqla-tester]

mike bayer (zzzeek) wrote:

perfect, thanks all!

View this in Gerrit at https://gerrit.sqlalchemy.org/c/sqlalchemy/alembic/+/4974

[sqla-tester]

Gerrit review https://gerrit.sqlalchemy.org/c/sqlalchemy/alembic/+/4974 has been merged. Congratulations! :)