How to Migrate from ParadeDB to MariaDB

Galaxy Glossary

How do I migrate data from ParadeDB to MariaDB without downtime?

Move tables, data, and indexes from ParadeDB (PostgreSQL) to MariaDB using dump, transform, and load tools.

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Description

Example H2

Example H3

Why migrate from ParadeDB to MariaDB?

Teams move to MariaDB for lower licensing cost, MySQL-compatible tooling, or to standardize on a single engine. A structured plan avoids data loss and downtime.

What are the prerequisites?

Install pg_dump, MariaDB client, and pgloader. Ensure network access between the ParadeDB host and the MariaDB server. Create matching users and empty databases in MariaDB.

How do I export data from ParadeDB?

Use pg_dump with --data-only or --schema-only flags. Plain SQL format simplifies type mapping, while CSV suits bulk loads via LOAD DATA INFILE.

How do I convert PostgreSQL types to MariaDB?

Map serial to AUTO_INCREMENT, boolean to TINYINT(1), and bytea to BLOB. Replace PostgreSQL’s UUID with CHAR(36) or MariaDB’s UUID plugin.

How do I load data into MariaDB?

Pipe the transformed SQL into mysql, or bulk-load CSV files using LOAD DATA LOCAL INFILE. Disable foreign keys during load for speed, then re-enable and validate.

How do I verify a successful migration?

Run row counts on both systems (SELECT COUNT(*) FROM Customers). Spot-check aggregates like total order_amount. Use checksums for critical tables.

Best practices for production migrations?

Run a rehearsal on staging. Freeze writes to ParadeDB, capture an incremental dump, load into MariaDB, and swap connections. Keep ParadeDB in read-only mode for fallback.

Common performance tuning steps?

Create covering indexes for frequent joins, increase innodb_buffer_pool_size, and analyze slow query logs. Verify that sequences became AUTO_INCREMENT and that UTF-8 encodings match.

Example pgloader pipeline

pgloader postgres://user:pass@paradedb/shop mysql://user:pass@mariadb/shop \ --with "batch rows = 5000" \ --cast "type boolean to tinyint"

Why How to Migrate from ParadeDB to MariaDB is important

How to Migrate from ParadeDB to MariaDB Example Usage


-- Verify migrated totals
SELECT c.name,
       COUNT(o.id)   AS orders,
       SUM(o.total_amount) AS lifetime_value
FROM Customers c
JOIN Orders    o ON o.customer_id = c.id
GROUP BY c.name
ORDER BY lifetime_value DESC
LIMIT 5;

How to Migrate from ParadeDB to MariaDB Syntax


# Export schema without ParadeDB-specific extensions
pg_dump -U postgres -s shop > shop_schema.sql

# Export data only, ordering tables for FK safety
pg_dump -U postgres -a --column-inserts shop > shop_data.sql

# Edit shop_schema.sql
-- serial      ➔ AUTO_INCREMENT
-- boolean     ➔ TINYINT(1)
-- text search ➔ remove or rewrite

# Load into MariaDB
mysql -u root -p shop < shop_schema.sql
mysql -u root -p shop < shop_data.sql

# Example ecommerce table creation in MariaDB
CREATE TABLE Customers (
  id INT PRIMARY KEY AUTO_INCREMENT,
  name VARCHAR(255),
  email VARCHAR(255) UNIQUE,
  created_at DATETIME
);

CREATE TABLE Orders (
  id INT PRIMARY KEY AUTO_INCREMENT,
  customer_id INT,
  order_date DATETIME,
  total_amount DECIMAL(10,2),
  FOREIGN KEY (customer_id) REFERENCES Customers(id)
);

Common Mistakes

Running pg_dump while writes continue. This causes inconsistent snapshots. Fix by enabling ParadeDB’s <code>pg_export_snapshot</code> or setting the database to read-only during the dump.
Leaving PostgreSQL-specific types (e.g., <code>ARRAY</code>) unchanged. MariaDB rejects them. Replace arrays with JSON columns or child tables before loading.