SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 1)
    Asterisk
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier system.errors
   Function and (children 1)
    ExpressionList (children 3)
     Function equals (children 1)
      ExpressionList (children 2)
       Identifier name
       Literal \'UNKNOWN_IDENTIFIER\'
     Function greater (children 1)
      ExpressionList (children 2)
       Identifier last_error_time
       Function minus (children 1)
        ExpressionList (children 2)
         Function now (children 1)
          ExpressionList
         Literal UInt64_1
     Function like (children 1)
      ExpressionList (children 2)
       Identifier last_error_message
       Literal \'%Missing columns%89467d35-77c2-4f82-ae7a-f093ff40f4cd%\'
