CreateQuery test_00563 (children 3)
 Identifier test_00563
 Columns definition (children 1)
  ExpressionList (children 3)
   ColumnDeclaration dt (children 1)
    DataType Date
   ColumnDeclaration site_id (children 1)
    DataType Int32
   ColumnDeclaration site_key (children 1)
    DataType String
 Storage definition (children 1)
  Function MergeTree (children 1)
   ExpressionList (children 3)
    Identifier dt
    Function tuple (children 1)
     ExpressionList (children 3)
      Identifier site_id
      Identifier site_key
      Identifier dt
    Literal UInt64_8192