How do I check if an index exists on a table field in MySQL?

Question

I\'ve needed to Google this a couple times, so I\'m sharing my Q/A.

Answer 1

Try use this:

SELECT TRUE
FROM INFORMATION_SCHEMA.KEY_COLUMN_USAGE 
WHERE TABLE_SCHEMA = "{DB_NAME}" 
AND TABLE_NAME = "{DB_TABLE}"
AND COLUMN_NAME = "{DB_INDEXED_FIELD}";