CreateQuery projection_test (children 3)
 Identifier projection_test
 Columns definition (children 2)
  ExpressionList (children 2)
   ColumnDeclaration dt (children 1)
    DataType DateTime
   ColumnDeclaration cost (children 1)
    DataType Int64
  ExpressionList (children 1)
   Projection (children 1)
    ProjectionSelectQuery (children 2)
     ExpressionList (children 2)
      Function toStartOfMinute (alias dt_m) (children 1)
       ExpressionList (children 1)
        Identifier dt
      Function sum (children 1)
       ExpressionList (children 1)
        Identifier cost
     ExpressionList (children 1)
      Identifier dt_m
 Storage definition (children 3)
  Function MergeTree
  Function toDate (children 1)
   ExpressionList (children 1)
    Identifier dt
  Identifier dt
