anchor.diff:  div_
   comma
   chars
  +create_table
  +not_null
  +partition_key
  +timestamp
   .
   
  -Rootsymbol Query.
  +Rootsymbol Statement.
   Endsymbol '$end'.
  +
  +Statement -> Query : '$1'.
  +Statement -> TableDefinition : '$1'.
   
   Query -> Select limit int : add_limit('$1', '$2', '$3').
   Query -> Select           : '$1'.
  
positive.code: Comp -> nomatch   : '$1'.
  Comp -> notapprox : '$1'.
  
  
  Erlang code.
  
  
negative.code: Val
  Vals
  Funcall
  TableDefinition
  TableContentsSource
  TableElementList
  TableElements
  TableElement
  ColumnDefinition
  ColumnConstraint
  KeyDefinition
  DataType
  .
  
  Terminals
  