MySQL :: MySQL Forums :: Optimizer & Parser

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bug?? partial index gives wrong results with IN subquery

3,054

Paul Davies

01/29/2007 08:44AM

File Sort

2,972

aftab khan

01/25/2007 08:49AM

Re: File Sort

2,017

KimSeong Loh

01/26/2007 07:50AM

SQL Newbie needs urgently help! [optimizing query]

3,549

Toxic Head

01/24/2007 05:31AM

Re: SQL Newbie needs urgently help! [optimizing query]

2,350

Toxic Head

01/24/2007 05:52AM

Re: SQL Newbie needs urgently help! [optimizing query]

2,252

Toa Sty

01/24/2007 06:07AM

Re: SQL Newbie needs urgently help! [optimizing query]

2,305

Toxic Head

01/24/2007 06:18AM

Re: SQL Newbie needs urgently help! [optimizing query]

2,163

Toa Sty

01/24/2007 07:16AM

Re: SQL Newbie needs urgently help! [optimizing query]

2,333

Toxic Head

01/24/2007 07:32AM

Re: SQL Newbie needs urgently help! [optimizing query]

2,169

Toxic Head

01/24/2007 06:41AM

Re: SQL Newbie needs urgently help! [optimizing query]

2,181

Toxic Head

01/24/2007 07:16AM

Re: SQL Newbie needs urgently help! [optimizing query]

2,263

Toa Sty

01/24/2007 08:16AM

Re: SQL Newbie needs urgently help! [optimizing query]

2,340

Toxic Head

01/24/2007 08:50AM

Re: SQL Newbie needs urgently help! [optimizing query]

2,303

Toxic Head

01/24/2007 09:24AM

Re: SQL Newbie needs urgently help! [optimizing query]

2,186

Björn Steinbrink

01/24/2007 03:19PM

Re: SQL Newbie needs urgently help! [optimizing query]

2,112

Toxic Head

01/25/2007 07:27AM

Re: SQL Newbie needs urgently help! [optimizing query]

2,427

Toa Sty

01/24/2007 10:29AM

Re: SQL Newbie needs urgently help! [optimizing query]

2,249

Toxic Head

01/24/2007 10:40AM

Re: SQL Newbie needs urgently help! [optimizing query]

2,189

Toa Sty

01/24/2007 09:10AM

need solution for ORDER BY and COUNT

3,089

Konstantin S.

01/25/2007 05:46AM

Need help optmizing query

2,626

Pascual Angulo

01/16/2007 03:58PM

Re: Need help optmizing query

2,020

KimSeong Loh

01/16/2007 06:42PM

How to optimize a derived table required for re-ordering.

3,992

Vikash Bucha

11/25/2006 05:58AM

Re: How to optimize a derived table required for re-ordering.

3,061

Toa Sty

01/15/2007 08:41AM

Help optimizing a slow query entry

3,070

Patrick

01/12/2007 10:28AM

Re: Help optimizing a slow query entry

1,983

Toa Sty

01/15/2007 08:30AM

Having problems with ORDER BY COUNT

14,288

steed coptang

04/29/2006 08:56AM

Re: Having problems with ORDER BY COUNT

5,116

Omar Khan

01/15/2007 03:35AM

Re: Having problems with ORDER BY COUNT

4,742

Toa Sty

01/15/2007 08:28AM

Problems optimize query

3,906

Rafal Kedziorski

01/08/2007 05:14PM

Make this faster?

3,737

Levi Tedder

01/04/2007 07:38AM

Re: Make this faster?

2,336

Björn Steinbrink

01/04/2007 03:34PM

Re: Make this faster?

2,310

Levi Tedder

01/05/2007 02:40AM

Re: Make this faster?

2,231

Björn Steinbrink

01/05/2007 05:07AM

Re: Make this faster?

2,245

Levi Tedder

01/05/2007 08:31AM

Re: Make this faster?

2,286

Toa Sty

01/05/2007 08:45AM

Re: Make this faster?

2,267

Levi Tedder

01/08/2007 02:44AM

Re: Make this faster?

2,204

Toa Sty

01/08/2007 04:28AM

Re: Make this faster?

2,247

Levi Tedder

01/08/2007 04:41AM

Re: Make this faster?

2,370

Levi Tedder

01/05/2007 03:11PM

Re: Make this faster?

2,229

Felix Geerinckx

01/05/2007 06:55AM

Re: Make this faster?

2,263

Toa Sty

01/05/2007 08:31AM

Re: Make this faster?

2,278

Levi Tedder

01/05/2007 08:33AM

Re: Make this faster?

2,445

Toa Sty

01/05/2007 08:45AM

Re: Make this faster?

2,269

Toa Sty

01/04/2007 10:21AM

Re: Make this faster?

2,227

Levi Tedder

01/04/2007 11:51AM

REGEXP is not optimized?

3,463

Maarten Oosten

12/15/2006 07:54AM

Re: REGEXP is not optimized?

2,452

Toa Sty

01/05/2007 08:57AM

Two general MySQL questions

4,340

Joost

01/02/2007 09:24AM

Re: Two general MySQL questions

2,163

KimSeong Loh

01/02/2007 08:11PM

Re: Two general MySQL questions

2,163

Joost

01/03/2007 05:35PM

Re: Two general MySQL questions

2,168

KimSeong Loh

01/03/2007 06:10PM

Re: Two general MySQL questions

2,160

Joost

01/04/2007 05:49AM

Re: Two general MySQL questions

2,159

Toa Sty

01/04/2007 10:53AM

i've got the query optimization blues ... stumped

2,979

Joe Simone

12/15/2006 02:48PM

Re: i've got the query optimization blues ... stumped

2,092

Toa Sty

01/04/2007 10:32AM

How to optimize the "order by" & "limit" query?

3,272

Jiangyubao Jiangyubao

12/18/2006 09:48AM

Re: How to optimize the "order by" & "limit" query?

2,232

Toa Sty

01/04/2007 10:25AM

parallelizing queries

2,661

Niklas Saers

01/02/2007 05:59AM

Query with GROUP BY (Using index for group-by -> Using index)

9,547

mnf

11/30/2006 05:20AM

Re: Query with GROUP BY (Using index for group-by -> Using index)

3,333

mnf

12/06/2006 02:03AM

Re: Query with GROUP BY (Using index for group-by -> Using index)

3,089

KimSeong Loh

12/07/2006 12:19AM

Re: Query with GROUP BY (Using index for group-by -> Using index)

3,213

mnf

12/25/2006 06:35AM

Re: Query with GROUP BY (Using index for group-by -> Using index)

3,587

KimSeong Loh

11/30/2006 08:18PM

Re: Query with GROUP BY (Using index for group-by -> Using index)

3,653

mnf

12/01/2006 12:21AM

optimization with table_cache

50,146

rei

09/05/2006 09:17PM

Re: optimization with table_cache

19,885

Björn Steinbrink

12/20/2006 02:45AM

Re: optimization with table_cache

20,407

sneakyimp

12/18/2006 10:40PM

Re: optimization with table_cache

20,192

Björn Steinbrink

12/20/2006 02:37AM

Optimizer Tool

3,153

Danie Van der Walt

09/04/2006 03:10AM

Re: Optimizer Tool

2,234

Yogesh Salvi

12/13/2006 04:57AM

Re: Optimizer Tool

3,405

KimSeong Loh

12/13/2006 07:39PM

Creating an index to include ORDER BY

3,125

Angus

11/02/2006 08:28AM

Re: Creating an index to include ORDER BY

1,946

KimSeong Loh

11/02/2006 05:31PM

Re: Creating an index to include ORDER BY

2,051

Angus

11/03/2006 09:24AM

Re: Creating an index to include ORDER BY

2,013

Yogesh Salvi

12/13/2006 05:02AM

Bad performance caused by DISTINCT?

8,505

Heist TheAlmighty

11/13/2006 02:02PM

Re: Bad performance caused by DISTINCT?

3,392

Yogesh Salvi

12/13/2006 04:46AM

Re: Bad performance caused by DISTINCT?

4,352

KimSeong Loh

11/19/2006 09:29PM

Two possible indexes in simple select but none is used

3,314

Ozkan Mehmedali

11/28/2006 10:40AM

Re: Two possible indexes in simple select but none is used

1,910

Yogesh Salvi

12/13/2006 04:41AM

Re: Two possible indexes in simple select but none is used

1,954

KimSeong Loh

11/28/2006 06:27PM

how turn off optimizer?

3,111

krix asdasd

11/28/2006 11:40AM

Re: how turn off optimizer?

2,936

KimSeong Loh

11/28/2006 06:25PM

Re: how turn off optimizer?

2,709

krix asdasd

11/30/2006 02:04AM

Re: how turn off optimizer?

2,347

Dewey Gaedcke

12/12/2006 06:24PM

Re: how turn off optimizer?

2,324

Dewey Gaedcke

11/28/2006 11:24PM

Golden Rules of writting efficient query

8,806

Yogesh Salvi

11/23/2006 01:37AM

Re: Golden Rules of writting efficient query

2,495

Satya Prakash

12/08/2006 08:28AM

Re: Golden Rules of writting efficient query

3,299

KimSeong Loh

11/23/2006 02:17AM

Liberating Dependent Subqueries

14,512

Shlomo Swidler

11/27/2006 05:50PM

A more general way to do it

4,066

Shlomo Swidler

12/05/2006 08:43AM

Improvements to "constify"

3,847

Shlomo Swidler

12/07/2006 06:26AM

Re: Liberating Dependent Subqueries

3,083

mnf

12/01/2006 09:35AM

Re: Liberating Dependent Subqueries

2,789

KimSeong Loh

12/03/2006 06:21PM

Re: Liberating Dependent Subqueries

2,834

mnf

12/03/2006 08:18PM

Re: Liberating Dependent Subqueries

2,856

Shlomo Swidler

12/05/2006 06:11AM

Re: Liberating Dependent Subqueries

3,392

KimSeong Loh

11/28/2006 06:29PM

Re: Liberating Dependent Subqueries

4,184

Shlomo Swidler

11/30/2006 05:39PM

Re: Liberating Dependent Subqueries

3,836

Vikash Bucha

11/28/2006 12:57AM

Re: Liberating Dependent Subqueries

3,485

Shlomo Swidler

11/28/2006 03:09AM

Update with dependent subquery needs optimization!

4,278

Lon B

12/06/2006 05:23PM

Re: Update with dependent subquery needs optimization!

2,165

Björn Steinbrink

12/07/2006 02:04AM

optimizer using sql_no_cache

3,975

alan langridge

12/06/2006 07:56AM

Re: optimizer using sql_no_cache

1,996

alan langridge

12/06/2006 11:07AM

Optimizing a query

2,823

Ryan Smith

11/28/2006 10:37AM

Re: Optimizing a query

1,889

KimSeong Loh

11/28/2006 06:28PM

Join with more strict condition shows the record which is not visible without it

3,217

Michal Jaskolski

11/24/2006 06:08AM

Multiple join and Where clause

42,761

michele terlizzi

11/15/2006 05:13AM

Re: Multiple join and Where clause

6,859

Björn Steinbrink

11/22/2006 04:20PM

Including set type in index

4,186

Angus

11/10/2006 01:56PM

Re: Including set type in index

2,398

KimSeong Loh

11/12/2006 06:55PM

Re: Including set type in index

2,204

Angus

11/13/2006 09:36AM

to save as text block? or to save as rows?

2,915

ryan morris

11/10/2006 06:09PM

ignore

2,598

chris bagnall

11/10/2006 03:44AM

deleting approx. 180m records a month

2,946

Nolan Rumble

11/06/2006 03:09PM

Re: deleting approx. 180m records a month

1,979

KimSeong Loh

11/06/2006 07:04PM

Query cache

2,815

Markus Doppelbauer

10/31/2006 01:32PM

Re: Query cache

2,024

Toa Sty

10/31/2006 04:12PM

Re: Query cache

1,969

Markus Doppelbauer

11/01/2006 06:27AM

Re: Query cache

2,003

Michael Dar

11/01/2006 12:25PM

Re: Query cache

2,088

Toa Sty

11/02/2006 03:11AM

optimizing abs()

3,201

Michiel Betel

10/25/2006 04:31AM

Re: optimizing abs()

2,258

Toa Sty

10/25/2006 05:37AM

Re: optimizing abs()

1,973

Michiel Betel

10/29/2006 07:31AM

Optimizer ignores datetime index

5,281

Angus

10/27/2006 09:51AM

Re: Optimizer ignores datetime index

3,437

Toa Sty

10/27/2006 12:48PM

Re: Optimizer ignores datetime index

2,810

Angus

10/27/2006 01:09PM

Derived tables optimized differently than when directly queried?

3,924

Tom Callahan

10/25/2006 02:38PM

Re: Derived tables optimized differently than when directly queried?

2,115

Björn Steinbrink

10/26/2006 05:33PM

Simple Query - No Join - But Temp. Table and file Sort :(

4,127

Heiko G.

10/21/2006 09:06AM

Re: Simple Query - No Join - But Temp. Table and file Sort :(

2,519

Toa Sty

10/21/2006 10:55AM

Re: Simple Query - No Join - But Temp. Table and file Sort :(

2,942

Heiko G.

10/22/2006 04:56AM

Re: Simple Query - No Join - But Temp. Table and file Sort :(

2,337

Heiko G.

10/21/2006 11:17AM

Re: Simple Query - No Join - But Temp. Table and file Sort :(

2,894

Toa Sty

10/23/2006 06:41AM

Re: Simple Query - No Join - But Temp. Table and file Sort :(

2,644

Heiko G.

10/23/2006 11:02AM

Re: Simple Query - No Join - But Temp. Table and file Sort :(

2,316

Toa Sty

10/23/2006 01:01PM

Re: Simple Query - No Join - But Temp. Table and file Sort :(

2,706

Ravenous Bugblatter Beast

10/21/2006 05:20PM

Optimizer ignores number of records

2,754

Lite Wait

09/15/2006 06:28AM

Re: Optimizer ignores number of records

1,913

Ravenous Bugblatter Beast

10/21/2006 05:05AM

Performance of two similar Selects

2,895

Jay Klein

10/12/2006 06:34PM

Re: Performance of two similar Selects

1,937

Toa Sty

10/17/2006 02:07PM

How to speed up query of indexed column with 5M rows?

24,405

ryan zheng

10/09/2006 06:34AM

Re: How to speed up query of indexed column with 5M rows?

5,087

KimSeong Loh

10/09/2006 07:54PM

Re: How to speed up query of indexed column with 5M rows?

6,517

Toa Sty

10/09/2006 09:40AM

Re: How to speed up query of indexed column with 5M rows?

6,116

ryan zheng

10/09/2006 08:39PM

Re: How to speed up query of indexed column with 5M rows?

8,987

Larry Kagan

10/09/2006 08:11AM

Re: How to speed up query of indexed column with 5M rows?

7,516

ryan zheng

10/10/2006 12:23AM

Re: How to speed up query of indexed column with 5M rows?

6,539

Björn Steinbrink

10/12/2006 07:57PM

Re: How to speed up query of indexed column with 5M rows?

6,842

Larry Kagan

10/10/2006 08:45AM

Deactivate an activate Database

10,702

Sudipta Ghosh

10/06/2006 06:37AM

Re: Deactivate an activate Database

3,864

Bob Field

10/06/2006 09:35AM

Re: Deactivate an activate Database

3,320

Sudipta Ghosh

10/06/2006 11:12PM

Re: Deactivate an activate Database

3,107

Bob Field

10/06/2006 11:48PM

improving speed of mysql distance filter

9,436

aubrey falconer

05/19/2006 05:27PM

Re: improving speed of mysql distance filter

3,618

Peter Brawley

06/29/2006 07:54PM

Re: improving speed of mysql distance filter

3,122

Joost

06/28/2006 11:27AM

Re: improving speed of mysql distance filter

3,307

Bob Field

06/17/2006 03:12PM

Re: improving speed of mysql distance filter

4,772

Joost

06/28/2006 01:40AM

Re: improving speed of mysql distance filter

5,363

John Campbell

10/05/2006 09:56AM

Re: improving speed of mysql distance filter

3,342

aubrey falconer

06/17/2006 02:52PM

strange query performance

2,915

Eugene G

10/01/2006 08:56AM

Re: strange query performance

1,905

Eugene G

10/01/2006 11:56AM

Re: strange query performance

1,917

Toa Sty

10/03/2006 02:43AM

ORDER BY doesn't use index

12,106

Frederic Giudicelli

09/13/2006 12:32AM

Re: ORDER BY doesn't use index

3,834

KimSeong Loh

09/13/2006 02:36AM

Re: ORDER BY doesn't use index

3,489

Frederic Giudicelli

09/27/2006 03:39AM

Re: ORDER BY doesn't use index

3,324

Toa Sty

09/27/2006 05:02AM

Re: ORDER BY doesn't use index

3,243

Frederic Giudicelli

09/30/2006 05:53PM

Re: ORDER BY doesn't use index

3,256

Toa Sty

10/03/2006 02:38AM

Re: ORDER BY doesn't use index

5,336

Toa Sty

09/13/2006 02:00AM

Optimizing left outer join query

14,166

Muhammad Imran Khalid

09/24/2006 11:40PM