Tool for migrating a full database from mysql to postgresql

#Build

mvn clean install 

#Prerequisites mysqldump and psql needs to be installed and on the path for the process

#Run

java -Xmx4G -jar target/mysql2pgsql-1.0-SNAPSHOT.jar mysqlhost mysqlport mysqluser mysqlschema pgsqlhost pgsqlport pgsqldb pgsqluser pgsqlschema [table1...tableN]

Where the only optional argument is the list of tables. If provided, only those tables will be migrated. The memory requirement is because of migration taking place in parallell threads, where each thread will shuffle quite large data sets.

#Flow of operation

1. Dump mysql schema using mysqldump
2. Convert schema to pgsql format
3. Create schema and tables in pgsql with converted schema file. No indexes or constraints applied in this phase
4. Migrate all data from mysql to pgsql using jdbc, splitting tables into multiple batches if they are large
5. Create primary keys
6. Create indexes and other constraints
7. Update all sequences to the current max value of each serial column

#Not converted by this tool

• Views
• Functions
• Users/Accounts
• Table partitioning

#Misc Initial attempt was made with bash and python, using mysqldump to transport all data. This solution was quite slow, and when tested, jdbc and batching inserts turned out to be four times faster. The data types converted by this utility so far is based on a real life mysql instance: there is probably quite a few types that are missing. To be improved.