On 7/18/07, Pat Maddox <pergesu@xxxxxxxxx> wrote:
I've got a query that's taking forever (as will be obvious when you
see it and the explain output). I can't figure out what indexes to
add to make this run faster. I'd appreciate any help.
Pat
SELECT
SUM(CASE WHEN (hit IS TRUE AND logged_in IS TRUE) THEN 1 ELSE 0 END)
AS count_hits_console,
SUM(CASE WHEN (hit IS TRUE AND logged_in IS FALSE) THEN 1 ELSE 0 END)
AS count_hits_remote,
SUM(CASE WHEN (played IS TRUE AND logged_in IS TRUE) THEN 1 ELSE 0
END) AS count_played_console,
SUM(CASE WHEN (played IS TRUE AND logged_in IS FALSE) THEN 1 ELSE 0
END) AS count_played_remote,
SUM(CASE WHEN (downloaded IS TRUE AND logged_in IS TRUE) THEN 1 ELSE
0 END) AS count_downloaded_console,
SUM(CASE WHEN (downloaded IS TRUE AND logged_in IS FALSE) THEN 1 ELSE
0 END) AS count_downloaded_remote,
SUM(CASE WHEN ((played IS TRUE OR downloaded IS TRUE) AND logged_in
IS TRUE) THEN assets.size ELSE 0 END) as download_size_console,
SUM(CASE WHEN ((played IS TRUE OR downloaded IS TRUE) AND logged_in
IS FALSE) THEN assets.size ELSE 0 END) as download_size_remote,
videos.id, videos.title, videos.guid FROM video_views, assets, videos
WHERE videos.company_id=1 AND video_views.video_id=videos.id AND
video_views.asset_id=assets.id GROUP BY videos.id, videos.title,
videos.guid ORDER BY count_hits_remote DESC LIMIT 100
Limit (cost=139735.51..139735.68 rows=69 width=64)
-> Sort (cost=139735.51..139735.68 rows=69 width=64)
Sort Key: sum(CASE WHEN ((video_views.hit IS TRUE) AND
(video_views.logged_in IS FALSE)) THEN 1 ELSE 0 END)
-> HashAggregate (cost=139731.33..139733.40 rows=69 width=64)
-> Hash Join (cost=1164.79..138880.04 rows=30956 width=64)
Hash Cond: (video_views.asset_id = assets.id)
-> Hash Join (cost=324.39..137343.13 rows=30956 width=60)
Hash Cond: (video_views.video_id = videos.id)
-> Seq Scan on video_views
(cost=0.00..114500.13 rows=5922413 width=12)
-> Hash (cost=323.52..323.52 rows=69 width=52)
-> Bitmap Heap Scan on videos
(cost=64.90..323.52 rows=69 width=52)
Recheck Cond: (company_id = 1)
-> Bitmap Index Scan on
complete_videos_without_deleted_at (cost=0.00..64.88 rows=69 width=0)
Index Cond: (company_id = 1)
-> Hash (cost=645.18..645.18 rows=15618 width=12)
-> Seq Scan on assets (cost=0.00..645.18
rows=15618 width=12)
Here are the indexes I already have on the table:
"video_views_pkey" PRIMARY KEY, btree (id)
"index_video_views_on_asset_id" btree (asset_id)
"index_video_views_on_video_id" btree (video_id)
"index_video_views_on_video_id_and_asset_id_and_created_at" btree
(video_id, created_at, asset_id)
