This script helps determine the differences between two database schema files. Currently only supports MySQL schemas. For instance, you can use this to compare databases between Production and Development to see what changes you need to make to either environment.

The process is still pretty raw, but works well in our tests.

1. Run mysqldump --no-data on your databases you want to compare and save the resulting files.
2. Run python compare.py file1 file2

As an example, run:

python compare.py samples/schema_a.sql samples/schema_b.sql

Output:

Missing tables: 1; Missing fields: 1

File 1 missing tables:
[no missing tables]

File 1 missing fields:
[no missing fields]


File 2 missing tables:
- C

File 2 missing fields:
- B.missingField

import compare_schemas

if __name__ == '__main__':
    results = compare_schemas.compare('file1.sql', 'file2.sql')
    # compile our results
    results.report()
    # report
    if results.missing_tables == 0 and results.missing_fields == 0:
        print "Schemas are the same"
    else:
        """
        You can also access the pieces of the results via:
    
        results.file1_missing_elements['tables']
        results.file1_missing_elements['fields']
        results.file2_missing_elements['tables']
        results.file2_missing_elements['fields']
        
        Here we'll just use the built-in reporting
        """
        print results

Copyright (c) 2011 PNMG, Inc

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