anchor.diff:  alterTableStatement returns [shared_ptr<alter_table_statement> expr]
       @init {
           alter_table_statement::type type;
  -        auto props = make_shared<cql3::statements::cf_prop_defs>();;
  +        auto props = make_shared<cql3::statements::cf_prop_defs>();
           std::vector<std::pair<shared_ptr<cql3::column_identifier::raw>, shared_ptr<cql3::column_identifier::raw>>> renames;
           bool is_static = false;
       }
  
positive.code:     | st31=dropAggregateStatement      { $stmt = st31; }
  #endif
      | st32=createViewStatement         { $stmt = st32; }
      ;
  
  /*
  
negative.code: #include "cql3/statements/raw/select_statement.hh"
  #include "cql3/statements/alter_keyspace_statement.hh"
  #include "cql3/statements/alter_table_statement.hh"
  #include "cql3/statements/alter_view_statement.hh"
  #include "cql3/statements/create_keyspace_statement.hh"
  #include "cql3/statements/drop_keyspace_statement.hh"
  #include "cql3/statements/create_index_statement.hh"
  