Zev Benjamin 97851a93c4 Use full text search when using Postgres ...

On my laptop, this cuts search time from several seconds down to
a few hundred milliseconds.

If we want even more speed, we could store the ts_vector as a column
on the message database.  The Postgres documentation says this will
make "searches [...] faster, since it will not be necessary to redo
the to_tsvector calls to verify index matches."  Going this route
requires creating a trigger to automatically insert the appropriate
column when new rows are inserted.

Note that the full text index must be fully created before this
commit is deployed.  Full text search without an index is actually
significantly slower than using the LIKE operator.

(imported from commit ae74083da20d33aa2425d3e44fcdc19b160002ba)

2013-01-31 15:57:45 -05:00

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