Can MySQL Defer Referential Integrity Checks Until Commit?

Deferring Referential Integrity Checks Until Commit in MySQL

In database management, maintaining referential integrity ensures that data across tables remains consistent. MySQL, a popular relational database management system, enforces referential integrity checks by default. This can lead to challenges when inserting multiple related records within the same transaction.

Problem Statement:

When attempting to simultaneously insert products and related products using PHP PDO, referential integrity constraints cause errors. This issue arises even within a single transaction, making it difficult to insert records related through join tables.

Answer:

According to the provided answer, InnoDB, the default storage engine in MySQL, checks foreign key constraints immediately. This means that referential integrity checks cannot be deferred until commit. This behavior differs from the SQL standard, which specifies that constraint checks should be deferred.

Conclusion:

While MySQL does not support deferred referential integrity checks, exploring alternative approaches may be necessary. Researchers may consider investigating row-based triggers or using a different database management system that provides better support for deferred constraint checking.

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