How to Migrate from MariaDB to MySQL in PostgreSQL

Galaxy Glossary

How do I migrate a MariaDB database to MySQL?

Export the MariaDB schema and data, resolve incompatibilities, then import everything into MySQL with minimal downtime.

Welcome to the Galaxy, Guardian!

Oops! Something went wrong while submitting the form.

Description

Why migrate from MariaDB to MySQL?

Teams move to MySQL for managed services, enterprise support, or feature parity with existing infrastructure.

What prerequisites should be checked?

Match server versions, backup both databases, verify storage space, and ensure you have SUPER privileges on both hosts.

How to generate a dump from MariaDB?

Use mysqldump with --routines --events --triggers --single-transaction --skip-lock-tables to capture a consistent snapshot without downtime.

Which MariaDB features break in MySQL?

Sequences, virtual columns using non-deterministic functions, and storage engines like Aria are unsupported. Replace or remove them before import.

How do I script the replacements?

Create a sed/awk script or Python script that comments out CREATE SEQUENCE and converts JSON default values to MySQL-compatible syntax.

How to import the dump into MySQL?

Run mysql --init-command="SET sql_mode=''" -u root -p targetdb < dump.sql to avoid strict mode errors during load.

How do I validate the migrated data?

Compare row counts with SELECT table_name, table_rows FROM information_schema.tables WHERE table_schema='myshop'; on both servers. Spot-check financial totals and created_at timestamps.

How to update application connection strings?

Switch the ORM or connection pool URL to the new MySQL host, deploy, and monitor error logs for mismatched SQL syntax.

What best practices keep downtime low?

Run the import on a replica, enable binary logging, and use --master-data in mysqldump to set up replication for a seamless cut-over.

Why How to Migrate from MariaDB to MySQL in PostgreSQL is important

How to Migrate from MariaDB to MySQL in PostgreSQL Example Usage


# Migrate only Orders table for QA
mysqldump -u root -p myshop Orders \
          --where="order_date >= '2024-01-01'" \
          > orders_2024.sql

# Import into MySQL test database
docker exec -i mysql_test mysql -u root -pmy-secret-pw testdb < orders_2024.sql

How to Migrate from MariaDB to MySQL in PostgreSQL Syntax


# Export entire ecommerce database from MariaDB
mysqldump -u root -p --single-transaction \
          --routines --events --triggers \
          --databases myshop > myshop_mariadb.sql

# Export only Orders and related tables
mysqldump -u root -p myshop Customers Orders Products OrderItems \
          --where="order_date >= '2024-01-01'" \
          > orders_subset.sql

# Import into MySQL after editing dump
mysql -u root -p targetdb < myshop_mariadb.sql

# Verify Orders total_amount aggregation
mysql> SELECT SUM(total_amount) FROM Orders;

Common Mistakes

Ignoring MariaDB-only features. Sequences and virtual columns fail on import. Fix by removing or converting them before running mysql.
Forgetting to match character sets. UTF8MB3 in MariaDB imports as latin1 in MySQL, causing garbled text. Explicitly set <code>--default-character-set=utf8mb4</code>.