Mysql – How to convert a MySQL database to PostgreSQL

Add the following to my.ini

[mysqld]
log-bin=mysql-bin

Then, restart mysql

As for mysqldump, most of the options you need are defaulted already in --opt. Here are my choice parameters:

mysqldump -h... -u... -p... --master-data=2 --routines --triggers --flush-privileges --all-databases > DataDump.sql

Here is an explanation for my choices (including default --opt)

--opt               Same as --add-drop-table, --add-locks, --create-options,
                    --quick, --extended-insert, --lock-tables, --set-charset,
                    and --disable-keys. Enabled by default, disable with
                      --skip-opt.
-R, --routines      Dump stored routines (functions and procedures).
--triggers          Dump triggers for each dumped table.
--flush-privileges  Emit a FLUSH PRIVILEGES statement after dumping the mysql
                    database.  This option should be used any time the dump
                    contains the mysql database and any other database that
                    depends on the data in the mysql database for proper
                    restore.
--master-data[=#]   This causes the binary log position and filename to be
                    appended to the output. If equal to 1, will print it as a
                    CHANGE MASTER command; if equal to 2, that command will
                    be prefixed with a comment symbol. This option will turn
                    --lock-all-tables on, unless --single-transaction is
                    specified too (in which case a global read lock is only
                    taken a short time at the beginning of the dump; don't
                    forget to read about --single-transaction below). In all
                    cases, any action on logs will happen at the exact moment
                    of the dump. Option automatically turns --lock-tables
                    off.

You will need --master-data if you want to setup the dump to prepare replication slaves. The master log and position at the time of the dump will be recorded as a comment (using --master-data=2) or as a command (using --master-data=1) on line 22 of the dump file.

UPDATE 2011-07-26 15:20 EDT

If you would like to dump separate databases and separate tables, please follow the instructions at this URL.

I think that simplest way is to use that --hex-blob switch on mysqldump and restore by psql, with decode(string text, type text). However it's not that simple, because you need to change a little produced dump (sed, awk), adding that decode function. For example:

mysqldump -u root -p --skip-quote-names --hex-blob --skip-triggers \
    --compact --no-create-info mysql samples > prepg.dump

sed "s/0x\([0-9,A-F]*\))/decode('\1','hex'))/g" prepg.dump > pg.dump

psql session:

CREATE TABLE samples
(
    file_id integer PRIMARY KEY,
    file bytea
);

\i 'path/to/pg.dump'