AttachQuery file (children 3)
 Identifier file
 Columns definition (children 1)
  ExpressionList (children 2)
   ColumnDeclaration s (children 1)
    DataType String
   ColumnDeclaration n (children 1)
    DataType UInt8
 Storage definition (children 1)
  Function File (children 1)
   ExpressionList (children 1)
    Identifier TSV
