isabella232 / pg2mysql-1

Script to convert Postgres dump files to MySQL dump files

pg2mysql

pg2mysql transforms a pgdump file on STDIN into a MySQL dump file on STDOUT. Dump format must be INSERT statements, not binary or COPY statements (ie. pg_dump --insert <dbname>).

Usage:

./pg2mysql.pl < file.pgdump > mysql.sql
./pg2mysql.pl --skip table1 --skip table2 --insert_ignore < file.pgdump > mysql.sql 2>warnings.txt

It handles:

• CREATE TABLE statements, types converted to MySQL equivalents
• INSERT INTO statements, some values (like timestamp strings) massaged to work with MySQL
• CREATE INDEX statements
• ALTER TABLE statements (for foreign keys, other constraints)
• Sequence nextval column defaults translated to auto_increment
• With --insert_ignore, uses INSERT IGNORE statements to be more lenient with non-confirming values (at the cost of import accuracy)

All other statement types other than the ones above are ignored, and echoed as SQL comments to STDERR. If you want them in your final script, redirect STDERR to STDOUT with 2 >&1 when running the script.

Known issues

The script has a lot of limitations and there are surely bugs. If you find some, file an issue to tell us. But these are the things we know about:

• Only tables supported. Other schema entities like triggers, views, stored procedures are not created
• Some types badly / not supported
• Will convert a character varying type to longtext if no length is specified, which means MySQL won't be able to make it a key

Requirements

You must have Perl installed at /usr/bin/perl to run the script directly.

Credits

pg2mysql is heavily inspired and informed by this project of the same name: https://github.com/ChrisLundquist/pg2mysql

Which in turn was adapated from this web form: http://www.lightbox.ca/pg2mysql.php