PolarDB-X SQL (MySQL Compatibility Focus)

Write, review, and adapt SQL for PolarDB-X 2.0 Enterprise Edition (Distributed Edition) AUTO mode databases, avoiding the "runs on MySQL but fails on PolarDB-X" problem.

Architecture: PolarDB-X 2.0 Enterprise Edition (CN compute nodes + DN storage nodes + GMS metadata service + CDC log nodes) + AUTO mode database

Scope:

• PolarDB-X 2.0 Enterprise Edition (also known as Distributed Edition) + AUTO mode database

Not applicable to:

• PolarDB-X 1.0 (DRDS 1.0)
• PolarDB-X 2.0 Standard Edition
• PolarDB-X 2.0 Enterprise Edition DRDS mode databases

Key difference between AUTO mode and DRDS mode: AUTO mode uses MySQL-compatible PARTITION BY syntax to define partitions, while DRDS mode uses the legacy dbpartition/tbpartition syntax. Verify the database mode with:

SHOW CREATE DATABASE db_name;