Migrating Uber from MySQL to PostgreSQL
uber_migration_pypgday_2013
uber_migration_pypgday_2013
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Truncation<br />
Code Changes<br />
In <strong>MySQL</strong>, overflow of VARCHAR columns is not an error<br />
(it does, however, generate a “warning” which no one<br />
looks at).<br />
Tons and <strong>to</strong>ns of test cases and fixtures were generating<br />
fake data that overflowed, and I had <strong>to</strong> manually fix all<br />
of these tests. Only in one or two places were we<br />
actually truncating in production.<br />
Evan Klitzke (<strong>Uber</strong>, Inc.) <strong>Migrating</strong> <strong>Uber</strong> <strong>from</strong> <strong>MySQL</strong> <strong>to</strong> <strong>PostgreSQL</strong> March 13, 2013 36 / 59
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