CreateQuery source (children 3)
 Identifier source
 Columns definition (children 1)
  ExpressionList (children 5)
   ColumnDeclaration dt (children 1)
    DataType Date
   ColumnDeclaration ts (children 1)
    DataType DateTime
   ColumnDeclaration dt_32 (children 1)
    DataType Date32
   ColumnDeclaration ts_64 (children 1)
    DataType DateTime64 (children 1)
     ExpressionList (children 1)
      Literal UInt64_3
   ColumnDeclaration n (children 1)
    DataType Int32
 Storage definition (children 3)
  Function MergeTree
  Function toYYYYMM (children 1)
   ExpressionList (children 1)
    Identifier ts
  Function tuple (children 1)
   ExpressionList
