SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 2)
    Function s2ToGeo (children 1)
     ExpressionList (children 1)
      Identifier s2_index
    Function geoToS2 (children 1)
     ExpressionList (children 2)
      Identifier longitude
      Identifier latitude
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier s2_indexes
   ExpressionList (children 1)
    OrderByElement (children 1)
     Identifier s2_index