CreateQuery mt (children 3)
 Identifier mt
 Columns definition (children 1)
  ExpressionList (children 2)
   ColumnDeclaration p (children 1)
    DataType int
   ColumnDeclaration n (children 1)
    DataType int
 Storage definition (children 3)
  Function MergeTree
  Identifier p
  Function tuple (children 1)
   ExpressionList
