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[Laurynas Biveinis <laurynas.biveinis@xxxxxxxxx>]

Public bug reported:

Copy of https://bugs.mysql.com/bug.php?id=77637:

/root/mysql-5.6.25/sql/sql_planner.cc: In member function ‘void Optimize_table_order::best_access_path(JOIN_TAB*, table_map, uint, bool, double, POSITION*, POSITION*)’:
/root/mysql-5.6.25/sql/sql_planner.cc:431: warning: ‘loose_scan_opt.Loose_scan_opt::best_loose_scan_start_key’ may be used uninitialized in this function
/root/mysql-5.6.25/sql/sql_planner.cc:431: warning: ‘loose_scan_opt.Loose_scan_opt::best_max_loose_keypart’ may be used uninitialized in this function
/root/mysql-5.6.25/sql/sql_planner.cc:431: warning: ‘loose_scan_opt.Loose_scan_opt::best_loose_scan_records’ may be used uninitialized in this function
/root/mysql-5.6.25/sql/sql_planner.cc:431: warning: ‘loose_scan_opt.Loose_scan_opt::best_loose_scan_key’ may be used uninitialized in this function
/root/mysql-5.6.25/sql/sql_planner.cc:431: warning: ‘loose_scan_opt.Loose_scan_opt::quick_max_loose_keypart’ may be used uninitialized in this function

** Affects: mysql-server
     Importance: Unknown
         Status: Unknown

** Affects: percona-server
     Importance: Undecided
         Status: Invalid

** Affects: percona-server/5.5
     Importance: Undecided
         Status: Invalid

** Affects: percona-server/5.6
     Importance: Low
     Assignee: Laurynas Biveinis (laurynas-biveinis)
         Status: In Progress

** Affects: percona-server/5.7
     Importance: Undecided
         Status: Invalid


** Tags: upstream

** Also affects: percona-server/5.5
   Importance: Undecided
       Status: New

** Also affects: percona-server/5.6
   Importance: Undecided
       Status: New

** Also affects: percona-server/5.7
   Importance: Undecided
       Status: New

** Changed in: percona-server/5.5
       Status: New => Invalid

** Changed in: percona-server/5.6
   Importance: Undecided => Low

** Changed in: percona-server/5.6
       Status: New => In Progress

** Changed in: percona-server/5.7
       Status: New => Invalid

** Changed in: percona-server/5.6
     Assignee: (unassigned) => Laurynas Biveinis (laurynas-biveinis)

** Tags added: upstream

** Bug watch added: MySQL Bug System #77637
   http://bugs.mysql.com/bug.php?id=77637

** Also affects: mysql-server via
   http://bugs.mysql.com/bug.php?id=77637
   Importance: Unknown
       Status: Unknown

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https://bugs.launchpad.net/bugs/1660628

Title:
  -Wmaybe-uninitialized sql_planner.cc compilation warnings

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