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  1. MariaDB Server
  2. MDEV-23123

add last_used column to information_schema.index_statistics

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      Add last_used column in information_schema.index_statistics

      To check, if an index will ever used , a column last_used would be helpful.

      Alternatives like
      https://mariadb.com/kb/en/performance-schema-table_io_waits_summary_by_index_usage-table/
      is only temporary and not permanent.

      Column should be of type date and only be updated, if different from current day to avoid too much load.

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            ralf.gebhardt Ralf Gebhardt
            Richard Richard Stracke
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