This commit also includes a few changes in the way we do some queries that
should speed searches up:
* Messages before and after the anchor are fetched in a single query by doing a
UNION ALL on the server. This incurs the cost of an extra sort because UNION
ALL does not guarantee the order that the results are appended, but it saves a
server round-trip.
* Searches involving flags now use a straight froward WHERE clause, which is
much faster than the one that django-bitfield generates (due to limitations of
the Django ORM)
(imported from commit a0db811a9073363cfabcf4b035d02d20dc8fc8a4)
This requires the tsearch_extras Postgres extension. To install the extension,
first install postgresql-9.1-tsearch-extras on both postgres-primary and
postgres-secondary (this would normally be done in a puppet apply, but there are
currently some changes that can't be applied on Postgres machines). Then run
the following as the postgres user on postgres-primary:
$ psql -d zulip -c 'CREATE EXTENSION tsearch_extras SCHEMA zulip;'
In dev environments, you must also run:
$ psql -d zulip_test_template -c 'CREATE EXTENSION tsearch_extras SCHEMA zulip;'
(imported from commit ad0a57c455b3b86002191ac5fb705d8f716f3296)
NarrowBuilder.by_stream and NarrowBuilder.by_topic for mit users uses a
regex to search by stream and topic. Python's re.escape escapes unicode
in a format that postgres can not parse. We escape unicode as '\uXXXX'
for postgres.
(imported from commit d2c27d4514c31fdc6ef1fea898fe721a6f0ab069)
Zev Benjamin
Jason Michalski