Re: Suggestions wanted for 7.2.4 query

Andrew,

> > If anyone is interested, the above idea worked.
>
> I am. Thanks, that was a clever idea.

Thanks! In that case, I'll give you the full implementation:

1) Build an index on the product of time and duration for the table "events":
jwnet_test=> create function add_time ( timestamp without time zone, interval
)
cal_test-> returns timestamp without time zone as '
cal_test'> select $1 + $2;
cal_test'> ' language 'sql' with (isstrict, iscachable);
cal_test=> create index idx_event_ends on events(add_time(event_date,
duration));
CREATE

2) add this as a column to the view:
create view sv_events as
select events.event_id, events.status, status_label, status.rollup as rstatus,
events.etype_id, type_name,
event_cats.ecat_id, cat_name, events.event_date, events.event_name,
jw_date_format(events.event_date, events.event_tz, events.duration) as
show_date,
cases.case_name || '(' || cases.docket || ')' as event_case,
events.case_id, cases.case_name, cases.docket, NULL::VARCHAR as
tgroup_name,
events.location_id, location_name, locations.zip_code,
locations.address,
locations.state_code, locations.city,
lu.user_name as lock_name, lu.email as lock_email, lu.user_id AS
lock_user, add_time(events.event_date, events.duration) as end_date
FROM status, locations, event_types, event_cats, cases,
events LEFT OUTER JOIN lock_users lu ON events.event_id = lock_record
WHERE events.status <> 0
AND (events.status = status.status AND status.relation = 'events')
AND events.location_id = locations.location_id
AND event_types.etype_id = events.etype_id
AND event_cats.ecat_id = event_types.ecat_id
AND events.case_id = cases.case_id;

3) change the query as follows:
SELECT sv_events.*, FALSE AS fuzzy_team FROM sv_events WHERE
(sv_events.event_date BETWEEN ('2003-04-07'::TIMESTAMP WITHOUT TIME ZONE) AND
('2003-05-19'::TIMESTAMP WITHOUT TIME ZONE)
or sv_events.end_date BETWEEN ('2003-04-07'::TIMESTAMP WITHOUT TIME ZONE)
AND ('2003-05-19'::TIMESTAMP WITHOUT TIME ZONE) )
AND EXISTS ( SELECT event_id FROM event_days WHERE event_days.event_id =
sv_events.event_id
AND (event_day BETWEEN ('2003-04-08'::TIMESTAMP WITHOUT TIME ZONE)
AND ('2003-06-17 23:59'::TIMESTAMP WITHOUT TIME ZONE) ) )
AND ( UPPER(case_name) LIKE 'RODRIGUEZ%' OR docket LIKE 'RODRIGUEZ%' OR
UPPER(tgroup_name) LIKE 'RODRIGUEZ%' OR EXISTS (SELECT tgroup_id FROM
trial_groups
JOIN cases USING(tgroup_id) WHERE trial_groups.status > 0 AND
((UPPER(case_name)
LIKE 'RODRIGUEZ%' OR docket LIKE 'RODRIGUEZ%') AND tgroup_id =
sv_events.case_id)
OR (UPPER(tgroup_name) LIKE 'RODRIGUEZ%' AND cases.case_id =
sv_events.case_id) ) ) AND rstatus <> 0;

The new version returns in 0.85 seconds, a 75% improvement! Yahoo!

--
-Josh Berkus
Aglio Database Solutions
San Francisco