CreateQuery 03173_single_function (children 3)
 Identifier 03173_single_function
 Columns definition (children 1)
  ExpressionList (children 1)
   ColumnDeclaration dt (children 1)
    DataType Date
 Storage definition (children 3)
  Function MergeTree
  Function toMonth (children 1)
   ExpressionList (children 1)
    Identifier dt
  Function tuple (children 1)
   ExpressionList
