SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 4)
   ExpressionList (children 2)
    Function replaceRegexpAll (children 1)
     ExpressionList (children 3)
      Identifier message
      Literal \'\\\\(\\\\d+\\\\)\'
      Literal \'_\'
    Identifier message_format_string
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier system.warnings
   Function like (children 1)
    ExpressionList (children 2)
     Identifier message
     Literal \'The number of%\'
   ExpressionList (children 1)
    OrderByElement (children 1)
     Identifier message
