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pygmy quickly imports mysql tab data dumps into a postgres database. psql does all the heavy lifting, pygmy just tells it what to do (drop keys and indexes, COPY data, recreate indexes and keys, run ANALYZE, populate sequences). Usage: pygmy [OPTION]... [-- [PSQL_OPTION]... [DBNAME [USERNAME]]] Example: mysqldump mydb -u myuser --tab=./ --no-create-info pygmy -- pgdb pguser Options: -d, --data-dir=DIR directory containing tab-delimited dump files (default: ".") --dry-run outputs the psql import commands rather than running them --export export each table from the pg database. will overwrite previous export files --verify confirm each exported table is identical to the source data. does implicit --export of any tables not already exported --no-import useful in conjunction with --verify if the data was imported previously. otherwise this behaves similarly to --dry-run --diff-threshold=N used in conjunction with --verify. files larger than N MB will be cksum'ed rather than diffed to determine if they are different. default 100 MB --schema=SCHEMA database schema (default: "public") -o, --only=T1,T2... only import the specified tables -s, --skip=T1,T2... skip the specified tables -v, --verbose verbose mode -h, --help show this help, then exit Notes: you must use the --tab option when dumping your mysql database, and you must not use any of the --fields-xxx or --lines-terminated-by options to change the formatting. PSQL_OPTIONS, DBNAME and USERNAME are passed along to psql. refer to its documentation for more info. pygmy only imports data, it does not set up the schema. it's built with rails apps in mind (though it may be useful for my->pg migrations in general). ideally you would do something like `rake db:migrate` prior to set up the schema. Known Limitations: * pygmy depends on psql, sed and awk. it has only been tested on Ubuntu, and is known not to work correctly on the Mac (due to differences in sed's behavior) * pygmy sets the lastval for each sequence to the maximum column value of any column(s) using it, which is probably (but not necessarily) the last auto-increment value in mysql * tables exported from postgres for verification should probably not be imported into your mysql db, since some data may be changed. anything looking like a bool (t or f) gets converted to a tinyint to elminate false positives during our diff (we do the same thing on the mysql side), and that includes varchar/text columns