sql_require_primary_key

Aikesheng Open Source Community

Jan 20, 2025 · Databases

Understanding MySQL 8.0.13 sql_require_primary_key and Resolving Inconsistent Data After Adding Auto‑Increment Primary Keys

This article analyzes why MySQL 8.0.13 introduced the sql_require_primary_key parameter, demonstrates how adding auto‑increment primary keys can cause master‑slave data inconsistencies, explains the underlying InnoDB row‑id behavior, and provides a step‑by‑step solution to synchronize tables.

InnoDBMySQLReplication

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Understanding MySQL 8.0.13 sql_require_primary_key and Resolving Inconsistent Data After Adding Auto‑Increment Primary Keys

Aikesheng Open Source Community

Jan 23, 2024 · Databases

Changing a Primary Key to a Composite Key in TDSQL for MySQL: Dealing with sql_require_primary_key

This article explains why TDSQL for MySQL refuses to drop a primary key when the sql_require_primary_key variable is ON, analyzes the underlying parameter behavior, and provides two practical solutions—temporarily disabling the variable or combining drop and add statements—to safely convert a single‑column primary key into a composite key.

Database AdministrationMySQLTDSQL

0 likes · 7 min read

Changing a Primary Key to a Composite Key in TDSQL for MySQL: Dealing with sql_require_primary_key