Mailing List
Home
MySQL General - General MySQL discussion
MaxDB - Everything about MaxDB, formerly known as SAP DB
MySQL on Win32 - Runing MySQL on Windows 9x/Me/NT/2000/XP
MySQL++ - Programming with the C++ API to MySQL
ODBC - ODBC with the MySQL Connector/ODBC driver
Java Help - Mostly related to the MySQL Connector/J driver
Perl - Perl support for MySQL with DBI and DBD::mysql
GUI - MySQL GUI Tools
Announcement
Subjects
• mysql openssl Question
• mysql:it 's a db not a dbms how it 's possible?!
• Does the binary log enabling affect the MySQL performances?
• Strange behavior, Table Level Permission
• FULLTEXT query format question
• Preventing Duplicate Entries
• Comparing and writing out BLOBS
• Executing MySQL Commands From Within C Program
• Can 't access mysql after kernel upgrade
• Mysql 4 0 Oracle Stored Procedure Trigger Conversion
• Downgrade Mysql from 4 to 3 23
• MySQL Cluster Software
• mysql test 4 1 fails with the gis test
• ERROR 2002: Can 't connect to local MySQL server through socket
• Getting Identity after INSERT
• Update one field with more fields from another table
• ERROR 1045: Access denied for user: 'root@localhost ' (Using
password: NO)
• mysql have same function mthod as Oracle decode()
 
Search:  
Power your search with and, or, +, -, or "some phrase" operators.
lock collisions

lock collisions

2004-03-19       - By Jos? Rómulo Elías Contreras

 Back
Thanks by your help.

Jos?Rómulo Elías Contreras
Ingeniero en Sistemas Computacionales
Guadalajara, Jalisco
Tel: (33) 3126-47-81 y 3126-48-13
Cel: (311) 910-50-59




>From: "Zabach, Elke" <elke.zabach@(protected)>
>To: 'Jos?Rómulo Elías Contreras' <jromuloe@(protected)>,  
>maxdb@(protected)
>Subject: RE: lock collisions
>Date: Fri, 19 Mar 2004 11:49:22 +0100
>
>Jos?Rómulo Elías Contreras wrote:
>
> >
> > Hi:
> >
> >       In a connection with isolation level 0, I put an
> > exclusive lock to a
> > row. Another connection with the same isolation level can
> > read this row if
> > the transacion of the first connection is not finished?
>
>It is the definition of isolation level 0 (read uncommitted) to be able
>to READ data no matter if it is committed/rollbacked/locked/not locked.
>--> yes, reader with isolevel 0 can read it.
>
> >
> >       What are the posibles collisions that can happen in
> > connections with
> > isolation level 0, if in the update staments I put an
> > exclusive lock for
> > each row that will be update?
>
>The others with isolevel 0 will not be able to update/delete
>this row, to SELECT..FOR UPDATE when this row would be selected,
>will not be able to lock (no matter if share or exclusive) the specific
>row or the whole table and will not be able to change the table definition
>for the specific table with some DDL (ALTER TABLE for example, CREATE
>INDEX).
>
>Elke
>SAP Labs Berlin
>
> >
> > Thanks
> >
> > Jos?Rómulo Elías Contreras
> > Ingeniero en Sistemas Computacionales
> > Guadalajara, Jalisco
> > Tel: (33) 3126-47-81 y 3126-48-13
> > Cel: (311) 910-50-59
> >
> > __ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ __
> > MSN. Más Útil Cada Día  http://www.msn.es/intmap/
> >
> >
> > --
> > MaxDB Discussion Mailing List
> > For list archives: http://lists.mysql.com/maxdb
> > To unsubscribe:
> > http://lists.mysql.com/maxdb?unsub=elke.zabach@(protected)
> >
>
>--
>MaxDB Discussion Mailing List
>For list archives: http://lists.mysql.com/maxdb
>To unsubscribe:    
>http://lists.mysql.com/maxdb?unsub=matt.woods@(protected)
>

__ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ __
Únete al mayor servicio mundial de correo electrónico:  
http://www.hotmail.com


--
MaxDB Discussion Mailing List
For list archives: http://lists.mysql.com/maxdb
To unsubscribe:    http://lists.mysql.com/maxdb?unsub=mysql@(protected)