fix for 'show create schema_table'
fix for usage schema tables in subselect
'wrong schema table charset' fix


mysql-test/r/information_schema.result:
  'wrong schema table charset' fix
mysql-test/t/information_schema.test:
  'wrong schema table charset' fix
sql/mysql_priv.h:
  fix for 'show create schema_table'
sql/sql_class.cc:
  'wrong schema table charset' fix
sql/sql_class.h:
  'wrong schema table charset' fix
sql/sql_parse.cc:
  fix for 'show create schema_table'
sql/sql_select.cc:
  'wrong schema table charset' fix
sql/sql_show.cc:
  remove unused parts of code
  fix for 'show create schema_table'
  fix for usage schema tables in subselect
sql/table.h:
  remove unused parts of coed
tests/client_test.c:
  'wrong schema table charset' fix