CreateQuery foo (children 3)
 Identifier foo
 Columns definition (children 1)
  ExpressionList (children 2)
   ColumnDeclaration Id (children 1)
    DataType Int32
   ColumnDeclaration Val (children 1)
    DataType Int32
 Storage definition (children 3)
  Function MergeTree
  Identifier Val
  Identifier Id
