Check if an index exists in MySQL.

In MySQL, you can use the SHOW INDEX or SHOW INDEXES statement to check if an index exists.

For example, to determine if an index named “idx_name” exists in the table named “table_name”, you can use the following statement:

SHOW INDEX FROM table_name WHERE Key_name = 'idx_name';

If the index exists, it will return a result; if it doesn’t, it won’t return any result.

Additionally, you can use the following statement to query information on all indexes and check if a specific index is included:

SHOW INDEX FROM table_name;

This will return all the index information in the table, and you can determine if a specific index exists based on the “Key_name” column.