MySQL to PostgreSQL Migration

Zwiegnet specializes in reliable, low-risk MySQL to PostgreSQL migrations on Linux distributions like AlmaLinux, Ubuntu LTS, and Debian. PostgreSQL offers superior standards compliance, advanced features (JSONB, full-text search with tsvector, window functions, extensibility via extensions like PostGIS), stricter ACID guarantees, and better handling of complex queries — making it ideal for modern applications moving beyond MySQL's limitations.

Our migration services include:

• Assessment & Planning – Detailed analysis of your MySQL schema, data volume, queries, stored procedures, replication setup, and application dependencies to create a customized migration roadmap with downtime estimates and rollback plans.
• Schema Conversion & Mapping – Automatic and manual conversion using tools like pgloader, Ora2Pg, or AWS Schema Conversion Tool (SCT); handling differences in data types (e.g., TINYINT → SMALLINT/BOOLEAN, DATETIME → TIMESTAMP, ENUM → CHECK constraints), auto-increment (SERIAL/IDENTITY), case-sensitivity, and MySQL-specific features like ON UPDATE CURRENT_TIMESTAMP (replaced with triggers).
• Data Migration & Transfer – Bulk data loading with pgloader (fast COPY-based transfers), AWS DMS for minimal-downtime/continuous replication (CDC), or custom scripts; support for large datasets, selective migrations, and validation of data integrity post-transfer.
• Query & Application Adaptation – Rewriting MySQL-specific SQL (e.g., GROUP BY quirks, LIMIT/OFFSET differences, full-text search → tsvector/tsquery, backticks → double-quotes); adapting stored procedures/functions to PL/pgSQL; handling differences in joins, subqueries, and transaction behavior.
• Performance Optimization & Indexing – PostgreSQL-specific tuning (e.g., GIN/GiST indexes for JSONB/full-text, partial indexes, BRIN for large tables), EXPLAIN ANALYZE review, vacuum/autovacuum configuration, and query planner adjustments for better performance than MySQL in complex workloads.
• Security & Compliance Hardening – Role-based access, row-level security, SSL enforcement, extension management (e.g., pgcrypto, uuid-ossp), and migration of users/privileges from MySQL grants to PostgreSQL roles.
• Minimal-Downtime & Zero-Downtime Strategies – Blue-green deployments, logical replication setup (pglogical or built-in), change data capture (CDC) with tools like Debezium, and phased cutover for live applications.
• Testing & Validation – Schema/data consistency checks, functional/regression testing, performance benchmarking, and dry-run migrations in staging environments.
• Post-Migration Support & Training – Monitoring setup (pgBadger, check_postgres), backup/recovery optimization, application connection updates (e.g., connection strings, drivers), and team training on PostgreSQL best practices.

Whether escaping MySQL licensing concerns, improving query capabilities, enabling advanced features, or preparing for cloud-native scaling — we ensure a smooth, production-safe transition with reduced risk and maximum uptime.

Located between Madison and Milwaukee, Wisconsin since 2009 — direct access to experienced PostgreSQL migration specialists with real-world enterprise migrations.