SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 1)
    Identifier ts
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier datetime64_index_tbl
   Function less (children 1)
    ExpressionList (children 2)
     Identifier ts
     Function toDate (children 1)
      ExpressionList (children 1)
       Literal \'2023-05-28\'