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3 Commits

Author SHA1 Message Date
Tim Abbott 1b8ab92058 migrations: Mark several RunSQL migrations as elidable. 2020-04-29 11:02:34 -07:00
Anders Kaseorg c734bbd95d python: Modernize legacy Python 2 syntax with pyupgrade. 
Generated by `pyupgrade --py3-plus --keep-percent-format` on all our
Python code except `zthumbor` and `zulip-ec2-configure-interfaces`,
followed by manual indentation fixes.

Signed-off-by: Anders Kaseorg <anders@zulipchat.com>
 2020-04-09 16:43:22 -07:00
Steve Howell c4e3cfebb0 presence: Add realm_id to UserPresence. 
This index is intended to optimize the performance of the very
frequently run query of "what is the presence status of all users in a
realm?".

Main changes:
    - add realm_id to UserPresence
    - add index for realm_id
    - backfill realm_id for old rows
    - change all writes to UserPresence to include
      realm_id

The index is of this form:

    "zerver_userpresence_realm_id_5c4ef5a9" btree (realm_id)

We will create an index on (realm_id, timestamp) in a
future commit, but I think it's a bit faster if you do
the backfill before the index.

There's also a minor tweak to the populate_db script.
 2020-02-10 17:21:45 -08:00