SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 1)
    Function count (children 1)
     ExpressionList
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier test_tuple
   Function greater (children 1)
    ExpressionList (children 2)
     Function toDate (children 1)
      ExpressionList (children 1)
       Identifier p
     Literal \'2020-09-01\'
