MySQL → PostgreSQL
hardPostgreSQL is more standards-compliant, has better JSON support, window functions, and a richer extension ecosystem. Moving from MySQL requires schema and query adjustments.
List all places using: AUTO_INCREMENT, ENUM types, FULLTEXT indexes, MySQL functions (IFNULL, GROUP_CONCAT, DATE_FORMAT).
pgloader handles most MySQL→PostgreSQL schema and data conversion automatically.
pgloader mysql://user:pass@localhost/mydb postgresql://user:pass@localhost/mydb
AUTO_INCREMENT → SERIAL/GENERATED. tinyint(1) → boolean. DATETIME → TIMESTAMP WITH TIME ZONE. Backticks → double quotes.
IFNULL → COALESCE. GROUP_CONCAT → STRING_AGG. LIMIT x,y → LIMIT y OFFSET x. Stricter GROUP BY (must include all non-aggregated columns).
Prisma: change provider to 'postgresql'. Drizzle: switch to pg dialect. Sequelize: change dialect option.
What this migration involves
Moving from MySQL to PostgreSQL is rated hard and takes about 8-20h on a typical project. The guide breaks it into 6 steps, 1 of which ship with runnable commands and 1 with a verification check.
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FAQ
How long does migrating from MySQL to PostgreSQL take?
Around 8-20h for a typical project — 6 steps, difficulty rated hard, 1 of them with copy-paste commands.
Is moving from MySQL to PostgreSQL reversible?
No reverse guide is tracked yet, so treat this as a one-way move and keep a full export of your MySQL data before you start.
What does PostgreSQL cost compared to MySQL?
Pricing for both tools is contact-based or not tracked yet.