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Understanding Oracle DML Locks and Their Role in Data Protection

Learn about Oracle DML locks and their vital role in safeguarding data in tables and indexes. Discover how Oracle automatically places row-level locks when modifying data, and delve into the default locking strategy, including the type and level of locks applied.

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Understanding Oracle DML Locks and Their Role in Data Protection

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  1. DML Locks • DML locks are locks placed by Oracle to protect data in tables and indexes. • Whenever a DML statement seeks to modify data in a table, Oracle automatically places a row-level lock on the rows in the table that are being modified.

  2. Oracle's Default Locking Strategy - Implicit Locking: • Since the Oracle engine has a Fully automatic locking strategy, it has to decide on two issues: • Type of Lock to be applied • Level of Lock to be applied

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