
    AWS provides a comprehensive guide for migrating Oracle reference-partitioned tables to PostgreSQL using AWS Database Migration Service (DMS), employing a trigger-based solution to maintain data locality and partition alignment during database migration.


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This article provides a comprehensive guide for migrating Oracle reference-partitioned tables to Amazon RDS or Aurora PostgreSQL using AWS Database Migration Service (DMS). The key challenges and solutions include:
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<li>Oracle reference partitioning doesn't have a direct equivalent in PostgreSQL</li>
<li>PostgreSQL cannot automatically align child records with parent partitions</li>
<li>Solution involves creating an equivalent partitioning scheme in PostgreSQL</li>
<li>Using a PostgreSQL BEFORE INSERT trigger to maintain data relationship</li>
<li>Configuring AWS DMS to migrate data with specific table mapping rules</li>
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The approach ensures data migration maintains the performance benefits of partitioning while transitioning from Oracle to PostgreSQL, using a trigger mechanism to preserve data colocation and relationship between parent and child tables.
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