# Condition Pushdown Into IN subqueries

This article describes Condition Pushdown into IN subqueries as implemented in [MDEV-12387](https://jira.mariadb.org/browse/MDEV-12387).

[optimizer\_switch](https://mariadb.com/docs/server/ha-and-performance/optimization-and-tuning/query-optimizations/optimizer-switch) flag name: `condition_pushdown_for_subquery`.

<sub>*This page is licensed: CC BY-SA / Gnu FDL*</sub>

{% @marketo/form formId="4316" %}