to
speed up this query or you think it is a bug in the optimizer?
- Selen
From: Selen Schabenberger selen_oz...@yahoo.com
To: General Discussion of SQLite Database sqlite-users@sqlite.org; Dan
Kennedy danielk1...@gmail.com
Sent: Wednesday, January 16, 2013
with IN operator
On 01/17/2013 06:32 PM, Selen Schabenberger wrote:
Dan, I have just realised that with the sqlite_stat3 table, the query
optimizer uses the INDEX IDX_TAG. When I drop this table, the PK is used
as you said. But the concatenated index is still not used with the stat3.
Looks like
SUBQUERY 1
Hope someone can help.
- Selen
From: Selen Schabenberger selen_oz...@yahoo.com
To: General Discussion of SQLite Database sqlite-users@sqlite.org; Richard
Hipp d...@sqlite.org
Sent: Wednesday, January 2, 2013 12:22 PM
Subject: Re: [sqlite
@sqlite.org
Sent: Wednesday, January 16, 2013 12:05 PM
Subject: Re: [sqlite] Multi-column index is not used with IN operator
On 01/16/2013 05:13 PM, Selen Schabenberger wrote:
I attach a small database where it is possible to reproduce the
issue. I deleted all irrelevant tables and all the tuples
@sqlite.org
Sent: Wednesday, January 16, 2013 1:12 PM
Subject: Re: [sqlite] Multi-column index is not used with IN operator
On 01/16/2013 06:25 PM, Selen Schabenberger wrote:
Below is the output of the dump. If it does not help reproduce the error,
then I can try to share the original database
Sent: Wednesday, January 16, 2013 1:12 PM
Subject: Re: [sqlite] Multi-column index is not used with IN operator
On 01/16/2013 06:25 PM, Selen Schabenberger wrote:
Below is the output of the dump. If it does not help reproduce the error,
then I can try to share the original database file
, 2013 2:56 PM
Subject: Re: [sqlite] Multi-column index is not used with IN operator
On 01/16/2013 08:48 PM, Selen Schabenberger wrote:
However, in 3.7.16, the penalty for the external sort is
(3*nRow*log10(nRow)) and there is no discount for using a
covering index (instead, there would be another
: Dan Kennedy danielk1...@gmail.com
To: sqlite-users@sqlite.org
Sent: Wednesday, January 16, 2013 3:14 PM
Subject: Re: [sqlite] Multi-column index is not used with IN operator
On 01/16/2013 09:04 PM, Selen Schabenberger wrote:
The entry for the Tag index in sqlite_stat1:
460132 1289
of SQLite Database sqlite-users@sqlite.org
Sent: Wednesday, January 16, 2013 3:40 PM
Subject: Re: [sqlite] Multi-column index is not used with IN operator
On 01/16/2013 09:22 PM, Selen Schabenberger wrote:
PRAGMA foreign_keys=OFF;
BEGIN TRANSACTION;
CREATE TABLE 'Message' ('Id' INTEGER PRIMARY KEY
Hi,
Having an index on 3 integer columns (column1, column2, column3), the analyse
command generates the stat1 and stat3 tables. I see the following statistics
for this index in the sqlite_stat1 table:
4600132 1289 1275 1
When I execute the following SQL query, this index is not used but the
The results I wrote was after executing the ANALYZE.
But If I drop the stat1 and stat3 tables, the query is faster and I see in the
output of the explain query plan that my index is used.
Selen
From: Simon Slavin slav...@bigfraud.org
To: Selen Schabenberger
By the way I am using the SQLite version 3.7.15.2. I do not see the same
behaviour with the version 3.6.
Selen
From: Selen Schabenberger selen_oz...@yahoo.com
To: Simon Slavin slav...@bigfraud.org; General Discussion of SQLite Database
sqlite-users
would really appreciate any suggestions.
Happy new year!
Regards,Selen
--- On Fri, 12/14/12, Richard Hipp d...@sqlite.org wrote:
From: Richard Hipp d...@sqlite.org
Subject: Re: [sqlite] Multi-column index is not used with IN operator
To: Selen Schabenberger selen_oz...@yahoo.com, General Discussion
Hi All,
I am observing some strange behaviour on my database when I execute a query
with an IN operator having more than 22 expressions. My table structure looks
basically as follows:
CREATE TABLE Messages (Id INTEGER PRIMARY KEY NOT NULL, Tag INTEGER NOT
NULL, Flag INTEGER )
I have a
chooses the primary key on the Id column.
-Selen
From: Richard Hipp d...@sqlite.org
To: Selen Schabenberger selen_oz...@yahoo.com; General Discussion of SQLite
Database sqlite-users@sqlite.org
Sent: Friday, December 14, 2012 3:09 PM
Subject: Re: [sqlite] Multi-column index is not used
From: Hick Gunter h...@scigames.at
To: 'Selen Schabenberger' selen_oz...@yahoo.com; 'General Discussion of
SQLite Database' sqlite-users@sqlite.org
Sent: Friday, December 14, 2012 3:26 PM
Subject: AW: [sqlite] Multi-column index is not used with IN operator
From what I understand
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