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Update README.md
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@mpyw
mpyw authored Nov 21, 2023
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Convert `has()` and `whereHas()` constraints to non-dependent subqueries.

**NOTICE: Postgres' optimizer is very smart and covers JOIN optimization for dependent (correlated) subqueries. Therefore, this library is mainly targeted at MySQL which has a poor optimizer.**
> [!IMPORTANT]
> **NOTICE: Postgres' optimizer is very smart and covers JOIN optimization for dependent (correlated) subqueries. Therefore, this library is mainly targeted at MySQL which has a poor optimizer.**
**UPDATE: [MySQL's optimizer has also been updated in version `8.0.16`](https://zenn.dev/yumemi_inc/articles/e8ca9535dba0b6) to include optimizations similar to PostgreSQL. This library is no longer maintained.**
> [!CAUTION]
> **UPDATE: [MySQL's optimizer has also been updated in version `8.0.16`](https://zenn.dev/yumemi_inc/articles/e8ca9535dba0b6) to include optimizations similar to PostgreSQL. This library is no longer maintained.**
## Requirements

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