GitLab

This fixes MDEV-7742 and MDEV-8305 (Allow user to specify if stored
procedures should be logged in the slow and general log)

New functionality:
- Added new variables log_slow_disable_statements and log_disable_statements
  that can be used to disable logging of certain queries to slow and
  general log. Currently supported options are 'admin', 'call', 'slave'
  and 'sp'.
  Defaults are as before. Only 'sp' (stored procedure statements) is
  disabled for  slow and general_log.
- Slow log to files now includes the following new information:
  - When logging stored procedure statements the name of stored
    procedure is logged.
  - Number of created tmp_tables, tmp_disk_tables and the space used
    by temporary tables.
- When logging 'call', the logged status now contains the sum of all
  included statements.  Before only 'time' was correct.
- Added filsort_priority_queue as an option for log_slow_filter (this
  variable existed before, but was not exposed)
- Added support for BIT types in my_getopt()

Mapped some old variables to bitmaps (old variables can still be used)
- Variable 'log_queries_not_using_indexes' is mapped to
  log_slow_filter='not_using_index'
- Variable 'log_slow_slave_statements' is mapped to
  log_slow_disabled_statements='slave'
- Variable 'log_slow_admin_statements' is mapped to
  log_slow_disabled_statements='admin'
- All the above variables are changed to session variables from global
  variables

Other things:
- Simplified LOGGER::log_command. We don't need to check for super if
  OPTION_LOG_OFF is set as this flag can only be set if one is a super
  user.
- Removed some setting of enable_slow_log as it's guaranteed to be set by
  mysql_parse()
- mysql_admin_table() now sets thd->enable_slow_log
- Added prepare_logs_for_admin_command() to reset thd->enable_slow_log if
  needed.
- Added new functions to store, restore and add slow query status
- Added new functions to store and restore query start time
- Reorganized Sub_statement_state according to types
- Added code in dispatch_command() to ensure that
  thd->reset_for_next_command() is always called for a query.
- Added thd->last_sql_command to simplify checking of what was the type
  of the last command. Needed when logging to slow log as lex->sql_command
  may have changed before slow logging is called.
- Moved QPLAN_TMP_... to where status for tmp tables are updated
- Added new THD variable, affected_rows, to be able to correctly log
  number of affected rows to slow log.