How to Index JSON Fields in MySQL with Generated and Functional Indexes

This guide explains why MySQL cannot index JSON columns directly and demonstrates two practical work‑arounds—using generated columns in MySQL 5.7 and functional indexes in MySQL 8.0.13—to efficiently index a nested request.email field for fast queries.

Functional IndexJSONdatabase indexing

0 likes · 8 min read

How to Index JSON Fields in MySQL with Generated and Functional Indexes

Aikesheng Open Source Community

Feb 3, 2021 · Databases

Understanding MySQL Functional (Expression) Indexes

The article explains MySQL functional (expression) indexes, how they are implemented via generated columns, demonstrates their creation and performance benefits for datetime and JSON fields, compares them with prefix indexes, and offers guidance for older MySQL versions.

Functional IndexGenerated ColumnsJSON Index

0 likes · 12 min read

Understanding MySQL Functional (Expression) Indexes