file .\ha_innodb.

Problem: if a partial unique key followed by a non-partial one we declare
the second one as a primary key.

Fix: sort non-partial unique keys before partial ones.


include/my_base.h:
  Fix for bug #31137: Assertion failed: primary_key_no == -1 || primary_key_no == 0, 
  file .\ha_innodb.
    - sort unique keys that don't contain partial segments before other keys:
        set HA_KEY_HAS_PART_KEY_SEG flag for such keys in the mysql_prepare_table(),
        use it in the sort_keys();
mysql-test/r/innodb_mysql.result:
  Fix for bug #31137: Assertion failed: primary_key_no == -1 || primary_key_no == 0, 
  file .\ha_innodb.
    - test result.
mysql-test/r/key.result:
  Fix for bug #31137: Assertion failed: primary_key_no == -1 || primary_key_no == 0, 
  file .\ha_innodb.
    - test result.
mysql-test/t/innodb_mysql.test:
  Fix for bug #31137: Assertion failed: primary_key_no == -1 || primary_key_no == 0, 
  file .\ha_innodb.
    - test case.
mysql-test/t/key.test:
  Fix for bug #31137: Assertion failed: primary_key_no == -1 || primary_key_no == 0, 
  file .\ha_innodb.
    - test case.
sql/sql_table.cc:
  Fix for bug #31137: Assertion failed: primary_key_no == -1 || primary_key_no == 0, 
  file .\ha_innodb.
    - sort unique keys that don't contain partial segments before other keys:
        set HA_KEY_HAS_PART_KEY_SEG flag for such keys in the mysql_prepare_table(),
        use it in the sort_keys();
sql/structs.h:
  Fix for bug #31137: Assertion failed: primary_key_no == -1 || primary_key_no == 0, 
  file .\ha_innodb.
    - sort unique keys that don't contain partial segments before other keys:
        set HA_KEY_HAS_PART_KEY_SEG flag for such keys in the mysql_prepare_table(),
        use it in the sort_keys();