I intend to do some more accelerations in mysql_execute_command and
in SQLCOM_SELECT part for which I need to fix EXPLAIN with derived
tables plus few additional items. If this proves to be much I wil
just make it a new SCRUM task


sql/sql_lex.h:
  Some small accelerations ...
sql/sql_parse.cc:
  Some small accelerations ...
sql/sql_yacc.yy:
  Some small accelerations ...