commant for function


sql/item_subselect.cc:
  redusing number of parameters
sql/sql_derived.cc:
  redusing number of parameters
sql/sql_lex.cc:
  redusing number of parameters
  comment for function
sql/sql_lex.h:
  redusing number of parameters
sql/sql_parse.cc:
  redusing number of parameters
sql/sql_select.cc:
  redusing number of parameters
sql/sql_union.cc:
  redusing number of parameters