Migrating Uber from MySQL to PostgreSQL
uber_migration_pypgday_2013
uber_migration_pypgday_2013
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Code Changes<br />
Implicit Ordering (cont.)<br />
Disclaimer: I am not a Postgres developer, this is based<br />
on what I’ve read online.<br />
Postgres does not implicitly cluster indexes on the<br />
primary key.<br />
Postgres indexes point <strong>to</strong> the on-disk location/offset of<br />
the row tuple, not the row id.<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 43 / 59