[Bug 1807262] Re: stein unit tests fail with sqlalchemy.exc.NoSuchTableError: migration_tmp

[Christian Ehrhardt ]

quoting; ... so that when "PRAGMA legacy_alter_table" is set behaviour
is still compatible with versions 3.24 and earlier).

WTH where would/should we set that PRAGMA?
I think that would be in sqlalchemy's sqlite backend?

Coreybc can you take over from here?

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Title:
  stein unit tests fail with sqlalchemy.exc.NoSuchTableError:
  migration_tmp

Status in cinder package in Ubuntu:
  Triaged
Status in nova package in Ubuntu:
  Triaged
Status in sqlite3 package in Ubuntu:
  New

Bug description:
  Several tests that use sqlite fail with:
  "sqlalchemy.exc.NoSuchTableError: migration_tmp". I'm currently
  hitting this with nova and cinder packages in disco.

  Note this started sometime after 11/19 when nova
  2:19.0.0~b1~git2018111953.3e756ff674-0ubuntu1 was uploaded (and built
  successfully at the time).

  After doing some digging this appears to occur with libsqlite3-0
  3.26.0-1 but does not occur with libsqlite3-0 3.25.3-1. Here are some
  more details on that, shown by running a failing unit test from the
  cinder package: https://paste.ubuntu.com/p/hsnQFQD572/

  Update: The test in the paste above also works successfully with
  libsqlite3-0 3.25.3-2.

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