List all indexes in MariaDB database

The query below lists all indexes in the database (schema).

Query

select index_schema,
       index_name,
       group_concat(column_name order by seq_in_index) as index_columns,
       index_type,
       case non_unique
            when 1 then 'Not Unique'
            else 'Unique'
            end as is_unique,
        table_name
from information_schema.statistics
where table_schema not in ('information_schema', 'mysql',
                           'performance_schema', 'sys')
group by index_schema,
         index_name,
         index_type,
         non_unique,
         table_name
order by index_schema,
         index_name;

Columns

  • index_schema - index schema (database)
  • index_name - name of the index
  • index_columns - list of index columns separated by ","
  • index_type
    • BTREE
    • RTREE
    • FULLTEXT
    • HASH
    • SPATIAL
  • is_unique - whether index is unique
    • Unique
    • Not unique
  • table_name - name of the table

Rows

  • One row represents one index
  • Scope of rows: all indexes in the database (schema)
  • Ordered by index name

Sample results

Indexes in the Sakila database (schema).

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