Re: Dropping ALL indexes from a database / not just a table?
How does one do that? How do you drop auto-increment attribute then drop the
index then restart the auto increment value where it was before you dropped
it?? I did not know you could do that.
The reason I ask is because the dbf_UID is a unique id tag the coders use to
identify a product by manufacturer kinda like a upc code for their internal db.
Can't have dups and don't want to have non-used id's in the db.
Any help, direction is much appreciated.
TIA...
Nunzio
From: Michael Dykman mdyk...@gmail.com
To: Nunzio Daveri nunziodav...@yahoo.com
Cc: Anirudh Sundar sundar.anir...@gmail.com; mysql@lists.mysql.com
Sent: Tue, August 10, 2010 5:03:44 PM
Subject: Re: Dropping ALL indexes from a database / not just a table?
auto_increment is only allowed on primary-keyed columns. I expect it
is not allowing you to drop the primary key because that column has
the auto_increment attribute. Drop that manually, and the primary key
should be able to let go.
- md
On Tue, Aug 10, 2010 at 5:58 PM, Nunzio Daveri nunziodav...@yahoo.com wrote:
Hi Micheal and all, ok so I did some digging around and I still can't find
why I cant drop the last few indexes.
mysql SELECT COUNT(1) FROM INFORMATION_SCHEMA.STATISTICS WHERE table_schema
= 'db_Market' AND table_name = 'dbt_Fruit' and index_name = 'PRIMARY';
+--+
| COUNT(1) |
+--+
|1 |
+--+
1 row in set (0.00 sec)
mysql DESCRIBE dbt_Fruit;
+--+--+--+-+-++
| Field| Type | Null | Key | Default |
Extra |
+--+--+--+-+-++
| dbf_UID | int(10) unsigned | NO | PRI | NULL|
auto_increment |
| dbf_Vendor | varchar(30) | NO | |
||
| dbf_Code | varchar(30) | NO | |
||
| dbf_Notes| text | YES | | NULL
||
+--+--+--+-+-++
mysql ALTER TABLE dbt_Fruit DROP FOREIGN KEY dbf_UID;
Query OK, 2947 rows affected (0.05 sec)
Records: 2947 Duplicates: 0 Warnings: 0
mysql ALTER TABLE dbt_Fruit DROP PRIMARY KEY;
ERROR 1075 (42000): Incorrect table definition; there can be only one auto
column and it must be defined as a key
mysql ALTER TABLE dbt_Fruit DROP PRIMARY;
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual
that corresponds to your MySQL server version for the right syntax to use
near '' at line 1
Any ideas??? I am wondering if it has something to do with the fact that
dbf_UID is a primary AND auto_increment?
TIA...
Nunzio
From: Michael Dykman mdyk...@gmail.com
To: Nunzio Daveri nunziodav...@yahoo.com
Cc: Anirudh Sundar sundar.anir...@gmail.com; mysql@lists.mysql.com
Sent: Tue, August 10, 2010 4:10:37 PM
Subject: Re: Dropping ALL indexes from a database / not just a table?
It's not a completely solution and will need some tweaking.. You
might have to run the PRIMARY KEYS distinctly from the rest.
- michael dykman
On Tue, Aug 10, 2010 at 4:43 PM, Nunzio Daveri nunziodav...@yahoo.com
wrote:
Hello Michael, thanks for the one liner. I ran it BUT I started to get
errors after I ran it the first time, this is what I got the 2nd time I
ran
it (first time I ran it I had 63 rows in the query, the 2nd time I have
9).
I ran it twice to make sure it got rid of the indexed. I verified the
index
size dropped from 850 mb to 65 mb.
+-+
| concat('ALTER TABLE ', TABLE_NAME, ' DROP INDEX ', CONSTRAINT_NAME,';')
|
+-+
| ALTER TABLE dbt_Fruits DROP INDEX PRIMARY; |
| ALTER TABLE dbt_Veggies DROP INDEX PRIMARY;
|
.
.
.
| ALTER TABLE dbt_Logs DROP INDEX
PRIMARY; |
+-+
9 rows in set (0.01 sec)
mysql ALTER TABLE dbt_Fruits DROP INDEX PRIMARY;
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual
that corresponds to your MySQL server version for the right syntax to use
near 'PRIMARY' at line 1
mysql ALTER TABLE dbt_Logs DROP INDEX PRIMARY;
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual
that corresponds to your MySQL server version for the right syntax to use
near 'PRIMARY' at line 1
mysql
Thanks again...
Nunzio
From: Michael Dykman mdyk...@gmail.com
To: Nunzio Daveri nunziodav...@yahoo.com
Cc: Anirudh Sundar sundar.anir...@gmail.com; mysql@lists.mysql.com
Sent: Tue, August 10, 2010 3:17:48 PM
Subject: Re: Dropping ALL indexes from a database / not just a table?
This should give
Re: Dropping ALL indexes from a database / not just a table?
Hello Nunzio, Instead of Dropping a index, you can disable the indexes and get the work done and re-enable them. If you are ok with this then run the below as a shell script :- MUSER=username MPASS=password DATABASE=dbname for db in $DATABASE do echo starting disabling indexes for database -- $db echo -- TABLES=`mysql -u $MUSER -p$MPASS $db -e show tables` for table in $TABLES do mysql -u $MUSER -p$MPASS $db -e Alter table $table disable keys done echo completed disabling indexes for database -- $db done Cheers, Anirudh Sundar On Tue, Aug 10, 2010 at 1:33 AM, Nunzio Daveri nunziodav...@yahoo.comwrote: Hello Gurus, is there a way / script that will let me DROP ALL the indexes in a single database? for example, lets say my database is call db_Animals, and inside db_Animals there are 97 tables, is there a SINGLE command or a perl script of some kind that can read all the MYI files, remove the .MYI from the file name then proceed to deleting whatever indexes it finds? I am doing this to debug a server that seems to be slow and sluggish. After I am done deleting I will review the slow query logs and then re-index to get the best performance? TIA... Nunzio
Re: Dropping ALL indexes from a database / not just a table?
At 01:06 AM 8/10/2010, you wrote: Hello Nunzio, Instead of Dropping a index, you can disable the indexes and get the work done and re-enable them. Disabling keys will NOT disable Primary or Unique keys. They will still be active. Mike If you are ok with this then run the below as a shell script :- MUSER=username MPASS=password DATABASE=dbname for db in $DATABASE do echo starting disabling indexes for database -- $db echo -- TABLES=`mysql -u $MUSER -p$MPASS $db -e show tables` for table in $TABLES do mysql -u $MUSER -p$MPASS $db -e Alter table $table disable keys done echo completed disabling indexes for database -- $db done Cheers, Anirudh Sundar On Tue, Aug 10, 2010 at 1:33 AM, Nunzio Daveri nunziodav...@yahoo.comwrote: Hello Gurus, is there a way / script that will let me DROP ALL the indexes in a single database? for example, lets say my database is call db_Animals, and inside db_Animals there are 97 tables, is there a SINGLE command or a perl script of some kind that can read all the MYI files, remove the .MYI from the file name then proceed to deleting whatever indexes it finds? I am doing this to debug a server that seems to be slow and sluggish. After I am done deleting I will review the slow query logs and then re-index to get the best performance? TIA... Nunzio -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?unsub=arch...@jab.org
Re: Dropping ALL indexes from a database / not just a table?
Thanks for the feedback. What I am trying to do is two things: 1. Remove all indexes and make the database smaller to copy and move to another prod box. Currently my indexes are in the double digit GB! Yikes ;-) 2. Remove all indexes so I can find out which ones are needed then tell mysql to recreate them and apparently it lessen data fragmentation if it starts from scratch vs. turning on and off. I was hoping to just remove all and then start from scratch so I know the data is not fragmented on the drives. Thanks again... Nunzio From: Anirudh Sundar sundar.anir...@gmail.com To: Nunzio Daveri nunziodav...@yahoo.com Cc: mysql@lists.mysql.com Sent: Tue, August 10, 2010 1:06:41 AM Subject: Re: Dropping ALL indexes from a database / not just a table? Hello Nunzio, Instead of Dropping a index, you can disable the indexes and get the work done and re-enable them. If you are ok with this then run the below as a shell script :- MUSER=username MPASS=password DATABASE=dbname for db in $DATABASE do echo starting disabling indexes for database -- $db echo -- TABLES=`mysql -u $MUSER -p$MPASS $db -e show tables` for table in $TABLES do mysql -u $MUSER -p$MPASS $db -e Alter table $table disable keys done echo completed disabling indexes for database -- $db done Cheers, Anirudh Sundar On Tue, Aug 10, 2010 at 1:33 AM, Nunzio Daveri nunziodav...@yahoo.com wrote: Hello Gurus, is there a way / script that will let me DROP ALL the indexes in a single database? for example, lets say my database is call db_Animals, and inside db_Animals there are 97 tables, is there a SINGLE command or a perl script of some kind that can read all the MYI files, remove the .MYI from the file name then proceed to deleting whatever indexes it finds? I am doing this to debug a server that seems to be slow and sluggish. After I am done deleting I will review the slow query logs and then re-index to get the best performance? TIA... Nunzio
Re: Dropping ALL indexes from a database / not just a table?
This should give you a good starting point (not tested):
select distinct concat('ALTER TABLE ', TABLE_NAME, ' DROP INDEX ',
CONSTRAINT_NAME,';')
from information_schema.key_column_usage where
TABLE_SCHEMA='mydatabase';
- md
On Tue, Aug 10, 2010 at 10:43 AM, Nunzio Daveri nunziodav...@yahoo.com wrote:
Thanks for the feedback. What I am trying to do is two things:
1. Remove all indexes and make the database smaller to copy and move to
another
prod box. Currently my indexes are in the double digit GB! Yikes ;-)
2. Remove all indexes so I can find out which ones are needed then tell mysql
to
recreate them and apparently it lessen data fragmentation if it starts from
scratch vs. turning on and off.
I was hoping to just remove all and then start from scratch so I know the data
is not fragmented on the drives.
Thanks again...
Nunzio
From: Anirudh Sundar sundar.anir...@gmail.com
To: Nunzio Daveri nunziodav...@yahoo.com
Cc: mysql@lists.mysql.com
Sent: Tue, August 10, 2010 1:06:41 AM
Subject: Re: Dropping ALL indexes from a database / not just a table?
Hello Nunzio,
Instead of Dropping a index, you can disable the indexes and get the work done
and re-enable them.
If you are ok with this then run the below as a shell script :-
MUSER=username
MPASS=password
DATABASE=dbname
for db in $DATABASE
do
echo starting disabling indexes for database -- $db
echo --
TABLES=`mysql -u $MUSER -p$MPASS $db -e show tables`
for table in $TABLES
do
mysql -u $MUSER -p$MPASS $db -e Alter table $table disable keys
done
echo completed disabling indexes for database -- $db
done
Cheers,
Anirudh Sundar
On Tue, Aug 10, 2010 at 1:33 AM, Nunzio Daveri nunziodav...@yahoo.com wrote:
Hello Gurus, is there a way / script that will let me DROP ALL the indexes in
a
single database? for example, lets say my database is call db_Animals, and
inside db_Animals there are 97 tables, is there a SINGLE command or a perl
script of some kind that can read all the MYI files, remove the .MYI from the
file name then proceed to deleting whatever indexes it finds? I am doing this
to debug a server that seems to be slow and sluggish. After I am done
deleting
I will review the slow query logs and then re-index to get the best
performance?
TIA...
Nunzio
--
- michael dykman
- mdyk...@gmail.com
May the Source be with you.
--
MySQL General Mailing List
For list archives: http://lists.mysql.com/mysql
To unsubscribe:http://lists.mysql.com/mysql?unsub=arch...@jab.org
Re: Dropping ALL indexes from a database / not just a table?
Hello Michael, thanks for the one liner. I ran it BUT I started to get errors
after I ran it the first time, this is what I got the 2nd time I ran it (first
time I ran it I had 63 rows in the query, the 2nd time I have 9). I ran it
twice to make sure it got rid of the indexed. I verified the index size
dropped
from 850 mb to 65 mb.
+-+
| concat('ALTER TABLE ', TABLE_NAME, ' DROP INDEX ', CONSTRAINT_NAME,';') |
+-+
| ALTER TABLE dbt_Fruits DROP INDEX PRIMARY; |
| ALTER TABLE dbt_Veggies DROP INDEX PRIMARY; |
.
.
.
| ALTER TABLE dbt_Logs DROP INDEX PRIMARY; |
+-+
9 rows in set (0.01 sec)
mysql ALTER TABLE dbt_Fruits DROP INDEX PRIMARY;
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that
corresponds to your MySQL server version for the right syntax to use near
'PRIMARY' at line 1
mysql ALTER TABLE dbt_Logs DROP INDEX PRIMARY;
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that
corresponds to your MySQL server version for the right syntax to use near
'PRIMARY' at line 1
mysql
Thanks again...
Nunzio
From: Michael Dykman mdyk...@gmail.com
To: Nunzio Daveri nunziodav...@yahoo.com
Cc: Anirudh Sundar sundar.anir...@gmail.com; mysql@lists.mysql.com
Sent: Tue, August 10, 2010 3:17:48 PM
Subject: Re: Dropping ALL indexes from a database / not just a table?
This should give you a good starting point (not tested):
select distinct concat('ALTER TABLE ', TABLE_NAME, ' DROP INDEX ',
CONSTRAINT_NAME,';')
from information_schema.key_column_usage where
TABLE_SCHEMA='mydatabase';
- md
On Tue, Aug 10, 2010 at 10:43 AM, Nunzio Daveri nunziodav...@yahoo.com wrote:
Thanks for the feedback. What I am trying to do is two things:
1. Remove all indexes and make the database smaller to copy and move to
another
prod box. Currently my indexes are in the double digit GB! Yikes ;-)
2. Remove all indexes so I can find out which ones are needed then tell mysql
to
recreate them and apparently it lessen data fragmentation if it starts from
scratch vs. turning on and off.
I was hoping to just remove all and then start from scratch so I know the data
is not fragmented on the drives.
Thanks again...
Nunzio
From: Anirudh Sundar sundar.anir...@gmail.com
To: Nunzio Daveri nunziodav...@yahoo.com
Cc: mysql@lists.mysql.com
Sent: Tue, August 10, 2010 1:06:41 AM
Subject: Re: Dropping ALL indexes from a database / not just a table?
Hello Nunzio,
Instead of Dropping a index, you can disable the indexes and get the work done
and re-enable them.
If you are ok with this then run the below as a shell script :-
MUSER=username
MPASS=password
DATABASE=dbname
for db in $DATABASE
do
echo starting disabling indexes for database -- $db
echo --
TABLES=`mysql -u $MUSER -p$MPASS $db -e show tables`
for table in $TABLES
do
mysql -u $MUSER -p$MPASS $db -e Alter table $table disable keys
done
echo completed disabling indexes for database -- $db
done
Cheers,
Anirudh Sundar
On Tue, Aug 10, 2010 at 1:33 AM, Nunzio Daveri nunziodav...@yahoo.com wrote:
Hello Gurus, is there a way / script that will let me DROP ALL the indexes in
a
single database? for example, lets say my database is call db_Animals, and
inside db_Animals there are 97 tables, is there a SINGLE command or a perl
script of some kind that can read all the MYI files, remove the .MYI from the
file name then proceed to deleting whatever indexes it finds? I am doing this
to debug a server that seems to be slow and sluggish. After I am done
deleting
I will review the slow query logs and then re-index to get the best
performance?
TIA...
Nunzio
--
- michael dykman
- mdyk...@gmail.com
May the Source be with you.
Re: Dropping ALL indexes from a database / not just a table?
It's not a completely solution and will need some tweaking.. You
might have to run the PRIMARY KEYS distinctly from the rest.
- michael dykman
On Tue, Aug 10, 2010 at 4:43 PM, Nunzio Daveri nunziodav...@yahoo.com wrote:
Hello Michael, thanks for the one liner. I ran it BUT I started to get
errors after I ran it the first time, this is what I got the 2nd time I ran
it (first time I ran it I had 63 rows in the query, the 2nd time I have 9).
I ran it twice to make sure it got rid of the indexed. I verified the index
size dropped from 850 mb to 65 mb.
+-+
| concat('ALTER TABLE ', TABLE_NAME, ' DROP INDEX ', CONSTRAINT_NAME,';') |
+-+
| ALTER TABLE dbt_Fruits DROP INDEX PRIMARY; |
| ALTER TABLE dbt_Veggies DROP INDEX PRIMARY; |
.
.
.
| ALTER TABLE dbt_Logs DROP INDEX
PRIMARY; |
+-+
9 rows in set (0.01 sec)
mysql ALTER TABLE dbt_Fruits DROP INDEX PRIMARY;
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual
that corresponds to your MySQL server version for the right syntax to use
near 'PRIMARY' at line 1
mysql ALTER TABLE dbt_Logs DROP INDEX PRIMARY;
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual
that corresponds to your MySQL server version for the right syntax to use
near 'PRIMARY' at line 1
mysql
Thanks again...
Nunzio
From: Michael Dykman mdyk...@gmail.com
To: Nunzio Daveri nunziodav...@yahoo.com
Cc: Anirudh Sundar sundar.anir...@gmail.com; mysql@lists.mysql.com
Sent: Tue, August 10, 2010 3:17:48 PM
Subject: Re: Dropping ALL indexes from a database / not just a table?
This should give you a good starting point (not tested):
select distinct concat('ALTER TABLE ', TABLE_NAME, ' DROP INDEX ',
CONSTRAINT_NAME,';')
from information_schema.key_column_usage where
TABLE_SCHEMA='mydatabase';
- md
On Tue, Aug 10, 2010 at 10:43 AM, Nunzio Daveri nunziodav...@yahoo.com
wrote:
Thanks for the feedback. What I am trying to do is two things:
1. Remove all indexes and make the database smaller to copy and move to
another
prod box. Currently my indexes are in the double digit GB! Yikes ;-)
2. Remove all indexes so I can find out which ones are needed then tell
mysql to
recreate them and apparently it lessen data fragmentation if it starts
from
scratch vs. turning on and off.
I was hoping to just remove all and then start from scratch so I know the
data
is not fragmented on the drives.
Thanks again...
Nunzio
From: Anirudh Sundar sundar.anir...@gmail.com
To: Nunzio Daveri nunziodav...@yahoo.com
Cc: mysql@lists.mysql.com
Sent: Tue, August 10, 2010 1:06:41 AM
Subject: Re: Dropping ALL indexes from a database / not just a table?
Hello Nunzio,
Instead of Dropping a index, you can disable the indexes and get the work
done
and re-enable them.
If you are ok with this then run the below as a shell script :-
MUSER=username
MPASS=password
DATABASE=dbname
for db in $DATABASE
do
echo starting disabling indexes for database -- $db
echo --
TABLES=`mysql -u $MUSER -p$MPASS $db -e show tables`
for table in $TABLES
do
mysql -u $MUSER -p$MPASS $db -e Alter table $table disable keys
done
echo completed disabling indexes for database -- $db
done
Cheers,
Anirudh Sundar
On Tue, Aug 10, 2010 at 1:33 AM, Nunzio Daveri nunziodav...@yahoo.com
wrote:
Hello Gurus, is there a way / script that will let me DROP ALL the indexes
in a
single database? for example, lets say my database is call db_Animals,
and
inside db_Animals there are 97 tables, is there a SINGLE command or a perl
script of some kind that can read all the MYI files, remove the .MYI from
the
file name then proceed to deleting whatever indexes it finds? I am doing
this
to debug a server that seems to be slow and sluggish. After I am done
deleting
I will review the slow query logs and then re-index to get the best
performance?
TIA...
Nunzio
--
- michael dykman
- mdyk...@gmail.com
May the Source be with you.
--
- michael dykman
- mdyk...@gmail.com
May the Source be with you.
--
MySQL General Mailing List
For list archives: http://lists.mysql.com/mysql
To unsubscribe:http://lists.mysql.com/mysql?unsub=arch...@jab.org
Re: Dropping ALL indexes from a database / not just a table?
Hi Micheal and all, ok so I did some digging around and I still can't find why
I
cant drop the last few indexes.
mysql SELECT COUNT(1) FROM INFORMATION_SCHEMA.STATISTICS WHERE table_schema =
'db_Market' AND table_name = 'dbt_Fruit' and index_name = 'PRIMARY';
+--+
| COUNT(1) |
+--+
|1 |
+--+
1 row in set (0.00 sec)
mysql DESCRIBE dbt_Fruit;
+--+--+--+-+-++
| Field| Type | Null | Key | Default | Extra |
+--+--+--+-+-++
| dbf_UID | int(10) unsigned | NO | PRI | NULL| auto_increment |
| dbf_Vendor | varchar(30) | NO | | ||
| dbf_Code | varchar(30) | NO | | ||
| dbf_Notes| text | YES | | NULL||
+--+--+--+-+-++
mysql ALTER TABLE dbt_Fruit DROP FOREIGN KEY dbf_UID;
Query OK, 2947 rows affected (0.05 sec)
Records: 2947 Duplicates: 0 Warnings: 0
mysql ALTER TABLE dbt_Fruit DROP PRIMARY KEY;
ERROR 1075 (42000): Incorrect table definition; there can be only one auto
column and it must be defined as a key
mysql ALTER TABLE dbt_Fruit DROP PRIMARY;
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that
corresponds to your MySQL server version for the right syntax to use near '' at
line 1
Any ideas??? I am wondering if it has something to do with the fact that
dbf_UID is a primary AND auto_increment?
TIA...
Nunzio
From: Michael Dykman mdyk...@gmail.com
To: Nunzio Daveri nunziodav...@yahoo.com
Cc: Anirudh Sundar sundar.anir...@gmail.com; mysql@lists.mysql.com
Sent: Tue, August 10, 2010 4:10:37 PM
Subject: Re: Dropping ALL indexes from a database / not just a table?
It's not a completely solution and will need some tweaking.. You
might have to run the PRIMARY KEYS distinctly from the rest.
- michael dykman
On Tue, Aug 10, 2010 at 4:43 PM, Nunzio Daveri nunziodav...@yahoo.com wrote:
Hello Michael, thanks for the one liner. I ran it BUT I started to get
errors after I ran it the first time, this is what I got the 2nd time I ran
it (first time I ran it I had 63 rows in the query, the 2nd time I have 9).
I ran it twice to make sure it got rid of the indexed. I verified the index
size dropped from 850 mb to 65 mb.
+-+
| concat('ALTER TABLE ', TABLE_NAME, ' DROP INDEX ', CONSTRAINT_NAME,';') |
+-+
| ALTER TABLE dbt_Fruits DROP INDEX PRIMARY; |
| ALTER TABLE dbt_Veggies DROP INDEX PRIMARY; |
.
.
.
| ALTER TABLE dbt_Logs DROP INDEX
PRIMARY; |
+-+
9 rows in set (0.01 sec)
mysql ALTER TABLE dbt_Fruits DROP INDEX PRIMARY;
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual
that corresponds to your MySQL server version for the right syntax to use
near 'PRIMARY' at line 1
mysql ALTER TABLE dbt_Logs DROP INDEX PRIMARY;
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual
that corresponds to your MySQL server version for the right syntax to use
near 'PRIMARY' at line 1
mysql
Thanks again...
Nunzio
From: Michael Dykman mdyk...@gmail.com
To: Nunzio Daveri nunziodav...@yahoo.com
Cc: Anirudh Sundar sundar.anir...@gmail.com; mysql@lists.mysql.com
Sent: Tue, August 10, 2010 3:17:48 PM
Subject: Re: Dropping ALL indexes from a database / not just a table?
This should give you a good starting point (not tested):
select distinct concat('ALTER TABLE ', TABLE_NAME, ' DROP INDEX ',
CONSTRAINT_NAME,';')
from information_schema.key_column_usage where
TABLE_SCHEMA='mydatabase';
- md
On Tue, Aug 10, 2010 at 10:43 AM, Nunzio Daveri nunziodav...@yahoo.com
wrote:
Thanks for the feedback. What I am trying to do is two things:
1. Remove all indexes and make the database smaller to copy and move to
another
prod box. Currently my indexes are in the double digit GB! Yikes ;-)
2. Remove all indexes so I can find out which ones are needed then tell
mysql to
recreate them and apparently it lessen data fragmentation if it starts
from
scratch vs. turning on and off.
I was hoping to just remove all and then start from scratch so I know the
data
is not fragmented on the drives.
Thanks again...
Nunzio
From: Anirudh Sundar sundar.anir...@gmail.com
To: Nunzio Daveri nunziodav...@yahoo.com
Cc: mysql@lists.mysql.com
Sent: Tue, August 10, 2010 1:06:41 AM
Subject: Re: Dropping ALL indexes from a database /
Re: Dropping ALL indexes from a database / not just a table?
auto_increment is only allowed on primary-keyed columns. I expect it
is not allowing you to drop the primary key because that column has
the auto_increment attribute. Drop that manually, and the primary key
should be able to let go.
- md
On Tue, Aug 10, 2010 at 5:58 PM, Nunzio Daveri nunziodav...@yahoo.com wrote:
Hi Micheal and all, ok so I did some digging around and I still can't find
why I cant drop the last few indexes.
mysql SELECT COUNT(1) FROM INFORMATION_SCHEMA.STATISTICS WHERE table_schema
= 'db_Market' AND table_name = 'dbt_Fruit' and index_name = 'PRIMARY';
+--+
| COUNT(1) |
+--+
| 1 |
+--+
1 row in set (0.00 sec)
mysql DESCRIBE dbt_Fruit;
+--+--+--+-+-++
| Field | Type | Null | Key | Default |
Extra |
+--+--+--+-+-++
| dbf_UID | int(10) unsigned | NO | PRI | NULL |
auto_increment |
| dbf_Vendor | varchar(30) | NO | |
| |
| dbf_Code | varchar(30) | NO | |
| |
| dbf_Notes | text | YES | | NULL
| |
+--+--+--+-+-++
mysql ALTER TABLE dbt_Fruit DROP FOREIGN KEY dbf_UID;
Query OK, 2947 rows affected (0.05 sec)
Records: 2947 Duplicates: 0 Warnings: 0
mysql ALTER TABLE dbt_Fruit DROP PRIMARY KEY;
ERROR 1075 (42000): Incorrect table definition; there can be only one auto
column and it must be defined as a key
mysql ALTER TABLE dbt_Fruit DROP PRIMARY;
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual
that corresponds to your MySQL server version for the right syntax to use
near '' at line 1
Any ideas??? I am wondering if it has something to do with the fact that
dbf_UID is a primary AND auto_increment?
TIA...
Nunzio
From: Michael Dykman mdyk...@gmail.com
To: Nunzio Daveri nunziodav...@yahoo.com
Cc: Anirudh Sundar sundar.anir...@gmail.com; mysql@lists.mysql.com
Sent: Tue, August 10, 2010 4:10:37 PM
Subject: Re: Dropping ALL indexes from a database / not just a table?
It's not a completely solution and will need some tweaking.. You
might have to run the PRIMARY KEYS distinctly from the rest.
- michael dykman
On Tue, Aug 10, 2010 at 4:43 PM, Nunzio Daveri nunziodav...@yahoo.com
wrote:
Hello Michael, thanks for the one liner. I ran it BUT I started to get
errors after I ran it the first time, this is what I got the 2nd time I
ran
it (first time I ran it I had 63 rows in the query, the 2nd time I have
9).
I ran it twice to make sure it got rid of the indexed. I verified the
index
size dropped from 850 mb to 65 mb.
+-+
| concat('ALTER TABLE ', TABLE_NAME, ' DROP INDEX ', CONSTRAINT_NAME,';')
|
+-+
| ALTER TABLE dbt_Fruits DROP INDEX PRIMARY; |
| ALTER TABLE dbt_Veggies DROP INDEX PRIMARY;
|
.
.
.
| ALTER TABLE dbt_Logs DROP INDEX
PRIMARY; |
+-+
9 rows in set (0.01 sec)
mysql ALTER TABLE dbt_Fruits DROP INDEX PRIMARY;
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual
that corresponds to your MySQL server version for the right syntax to use
near 'PRIMARY' at line 1
mysql ALTER TABLE dbt_Logs DROP INDEX PRIMARY;
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual
that corresponds to your MySQL server version for the right syntax to use
near 'PRIMARY' at line 1
mysql
Thanks again...
Nunzio
From: Michael Dykman mdyk...@gmail.com
To: Nunzio Daveri nunziodav...@yahoo.com
Cc: Anirudh Sundar sundar.anir...@gmail.com; mysql@lists.mysql.com
Sent: Tue, August 10, 2010 3:17:48 PM
Subject: Re: Dropping ALL indexes from a database / not just a table?
This should give you a good starting point (not tested):
select distinct concat('ALTER TABLE ', TABLE_NAME, ' DROP INDEX ',
CONSTRAINT_NAME,';')
from information_schema.key_column_usage where
TABLE_SCHEMA='mydatabase';
- md
On Tue, Aug 10, 2010 at 10:43 AM, Nunzio Daveri nunziodav...@yahoo.com
wrote:
Thanks for the feedback. What I am trying to do is two things:
1. Remove all indexes and make the database smaller to copy and move to
another
prod box. Currently my indexes are in the double digit GB! Yikes ;-)
2. Remove all indexes so I can find out which ones are needed then tell
mysql to
recreate them and apparently it lessen data fragmentation if it starts
from
scratch vs. turning on and off.
I was hoping to just remove all and then start from scratch so I
