CreateQuery test_tbl (children 3)
 Identifier test_tbl
 Columns definition (children 1)
  ExpressionList (children 2)
   ColumnDeclaration vend_nm (children 1)
    DataType String
   ColumnDeclaration ship_dt (children 1)
    DataType Date
 Storage definition (children 3)
  Function MergeTree
  Function toWeek (children 1)
   ExpressionList (children 1)
    Identifier ship_dt
  Identifier vend_nm
