Обсуждение: Moving from Mysql
Hi, Well, i'm moving some databases from Mysql to Pgsql, but i'm having some admin doubts, i wondering 3 things: 1. whar are equivalent for these commands: in mysql: mysqldump mydata_base_name mysql mydata_base_name < script.sql 2. any link to read about how to admin pgsql with mysql backgraounds, 3. how users are managed in pgsql, i need to create a specifiq username for db, but how? TIA LD
* Luis Daniel Lucio Quiroz (luis.daniel.lucio@gmail.com) wrote: > 1. whar are equivalent for these commands: > in mysql: mysqldump mydata_base_name pg_dump (pg_restore to restore from the dump, if you use a non-SQL format for it, which can give you the ability to do a parallel-restore) > mysql mydata_base_name < script.sql psql > 2. any link to read about how to admin pgsql with mysql backgraounds, The PG documentation is really quite good: http://www.postgresql.org/docs/8.4/ > 3. how users are managed in pgsql, i need to create a specifiq username for db, > but how? PG Roles (users and groups) are managed on a per-cluster level. There isn't a really good way to do them at a per-database level today. A cluster in PG is a full PG instance and a single cluster contains multiple databases. You can manage which databases users are allowed to connect to though, check out the GRANT command. Thanks, Stephen
Вложения
On Sat, May 22, 2010 at 11:06:02PM -0400, Stephen Frost wrote: > * Luis Daniel Lucio Quiroz (luis.daniel.lucio@gmail.com) wrote: > > 1. whar are equivalent for these commands: > > in mysql: mysqldump mydata_base_name > > pg_dump (pg_restore to restore from the dump, if you use a non-SQL > format for it, which can give you the ability to do a parallel-restore) The way to call pg_dump so it goes to the most flexible format in pg_dump -Fc. You can find out more about this format in the man page, if you're using a unix-like system, or in the on-line docs: http://www.postgresql.org/docs/current/static/app-pgdump.html > > mysql mydata_base_name < script.sql > > psql With the output of pg_dump -Fc, you'll be using pg_restore, which is more complex, but much more flexible. http://www.postgresql.org/docs/current/static/app-pgrestore.html > > 2. any link to read about how to admin pgsql with mysql backgraounds, > > The PG documentation is really quite good: > http://www.postgresql.org/docs/8.4/ Here are a few more specific ones, some of which may apply to your situation: http://sql-info.de/mysql/gotchas.html http://www.raditha.com/mysql/mysql2pgsql.php http://www.in-nomine.org/~asmodai/mysql-to-pgsql.html http://blog.gtuhl.com/2010/04/15/not-a-fan-of-mysql/ http://pgfoundry.org/projects/mysql2pgsql/ http://search.cpan.org/search?query=SQL%3A%3ATranslator&mode=all http://www.metatrontech.com/wpapers/mysql2postgresql.pdf http://www.data-conversions.net/products.php?prod_num=5&&dest=MENU&&ID=200 http://pgfoundry.org/projects/mysqlcompat > > 3. how users are managed in pgsql, i need to create a specifiq username for db, > > but how? > > PG Roles (users and groups) are managed on a per-cluster level. There > isn't a really good way to do them at a per-database level today. > A cluster in PG is a full PG instance and a single cluster contains > multiple databases. You can manage which databases users are allowed to > connect to though, check out the GRANT command. Also check out host-based authentication, which you control with an external file called pg_hba.conf: http://www.postgresql.org/docs/current/static/client-authentication.html Cheers, David. -- David Fetter <david@fetter.org> http://fetter.org/ Phone: +1 415 235 3778 AIM: dfetter666 Yahoo!: dfetter Skype: davidfetter XMPP: david.fetter@gmail.com iCal: webcal://www.tripit.com/feed/ical/people/david74/tripit.ics Remember to vote! Consider donating to Postgres: http://www.postgresql.org/about/donate