Last but not least....
There are many solutions to your minor problem(s)...
Its just sitting down to think of the possible ways to solve your problem.
Good luck!
----- Original Message -----
From: "sunil_s23" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Monday, June 18, 2001 12:20 PM
Subject: Re: Checking for Empty Result Set
> If we consider a large application; this involves
> doubling the number of SQL queries; one extra query
> for each query just to find out the count; I feel that
> we should be considering the overheads in accessing a
> database and executing a query and that too if it is
> over a network with heavy traffic.....
>
> --- King Maurice <[EMAIL PROTECTED]> wrote:
> > Economical way, your right its kinda tedious, but it
> > only about 4 simple
> > lines of code, how economical can you get, just pure
> > laziness maybe, but
> > that is up to your discretion, as long as you get
> > the job done.
> >
> >
> >
> > ----- Original Message -----
> > From: "sunil_s23" <[EMAIL PROTECTED]>
> > To: <[EMAIL PROTECTED]>
> > Sent: Monday, June 18, 2001 12:07 PM
> > Subject: Re: Checking for Empty Result Set
> >
> >
> > > That calls for two sql statements; is there a more
> > > economical way out ?.
> > > The following code seems to work, but not always.
> > > Any pointers ?
> > >
> > > ResultSet rs = ps.executeQuery();
> > > if(rs.isBeforeFirst() == false)
> > > {
> > > System.out.println("empty result set");
> > > }
> > > else
> > > {
> > > while(rs.next())
> > > {
> > >
> > > System.out.println(rs.getString("EMPLOYEE_NAME"));
> > > }
> > > }
> > >
> > > --- King Maurice <[EMAIL PROTECTED]> wrote:
> > > > Well the get the count of the resultset in your
> > sql
> > > > command and then test
> > > > for a condition of one
> > > >
> > > > You need to figure out on your own, the
> > conditions
> > > > in your code, if not your
> > > > lost!!!!
> > > >
> > > > Maurice~
> > > >
> > > > ----- Original Message -----
> > > > From: "sunil_s23" <[EMAIL PROTECTED]>
> > > > To: <[EMAIL PROTECTED]>
> > > > Sent: Monday, June 18, 2001 11:58 AM
> > > > Subject: Re: Checking for Empty Result Set
> > > >
> > > >
> > > > > This definitely caters to the case when there
> > is
> > > > only
> > > > > one row in the result set; but what about the
> > case
> > > > if
> > > > > the result set contains more than one row. I
> > am
> > > > > looking for a solution which will handle both
> > > > single
> > > > > row results and multiple row results as well
> > as
> > > > the
> > > > > case when the result set is empty.
> > > > > Any suggestions ?,
> > > > > Thanks,
> > > > > Sunil.
> > > > >
> > > > > --- King Maurice <[EMAIL PROTECTED]>
> > wrote:
> > > > > > I see your problem
> > > > > >
> > > > > > Do this example or follow this example if
> > you
> > > > can
> > > > > > comprehend.
> > > > > >
> > > > > > Example below::
> > > > > >
> > > > > > if (! rs.next())
> > > > > > {
> > > > > > %>
> > > > > > <table><tr><td>empty result
> > > > set</td></tr></table>
> > > > > > <%
> > > > > > }
> > > > > > else
> > > > > > {
> > > > > > String employee =
> > > > rs.getString("EMPLOYEE_NAME"));
> > > > > > %>
> > > > > > <table><tr><td><%= employee
> > > > %></td></tr></table>
> > > > > > <%
> > > > > > }
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > > ----- Original Message -----
> > > > > > From: "sunil_s23" <[EMAIL PROTECTED]>
> > > > > > To: <[EMAIL PROTECTED]>
> > > > > > Sent: Monday, June 18, 2001 11:44 AM
> > > > > > Subject: Re: Checking for Empty Result Set
> > > > > >
> > > > > >
> > > > > > > See the code below, it does not work if
> > there
> > > > is a
> > > > > > > single row in the result set; in other
> > words
> > > > the
> > > > > > > statement if(!rs.next()) causes a row of
> > > > result
> > > > > > set to
> > > > > > > be skipped.
> > > > > > > Any suggestions ?,
> > > > > > > Sunil.
> > > > > > >
> > > > > > > ResultSet rs = ps.executeQuery();
> > > > > > > if(!rs.next())
> > > > > > > System.out.println("empty
> > result
> > > > > > set");
> > > > > > > while(rs.next())
> > > > > > > {
> > > > > > >
> > System.out.println(rs.getString
> > > > > > > ("EMPLOYEE_NAME"));
> > > > > > > }
> > > > > > >
> > > > > > > --- Satyanarayan Divakar
> > > > > > > <[EMAIL PROTECTED]> wrote:
> > > > > > > > if(!resultSet.next())
> > > > > > > > display"No Records Retreived";
> > > > > > > >
> > > > > > > > -----Original Message-----
> > > > > > > > From: sunil_s23
> > [mailto:[EMAIL PROTECTED]]
> > > > > > > > Sent: Monday, June 18, 2001 10:27 AM
> > > > > > > > To: [EMAIL PROTECTED]
> > > > > > > > Subject: Re: Checking for Empty Result
> > Set
> > > > > > > >
> > > > > > > >
> > > > > > > > Hi All,
> > > > > > > > A ResultSet is never null once we
> > execute a
> > > > > > > > PreparedStatement and assign the result
> > to
> > > > the
> > > > > > > > Result
> > > > > > > > Set.
> > > > > > > > Is there any other way of checking
> > whether a
> > > > > > > > ResultSet
> > > > > > > > is empty ?
> > > > > > > > Thanks,
> > > > > > > > Sunil.
> > > > > > > > --- King Maurice
> > <[EMAIL PROTECTED]>
> > > > > > wrote:
> > > > > > > > > IF RESULTSET IS EQUAL TO NULL
> > > > > > > > > DO SOMETHING,
> > > > > > > > > SUGGESTION:: NO RECORDS FOUND PLEASE
> > TRY
> > > > AGAIN
> > > > > > > > >
> > > > > > > > >
> > > > > > > > > ----- Original Message -----
> > > > > > > > > From: "sunil_s23"
> > <[EMAIL PROTECTED]>
> > > > > > > > > To: <[EMAIL PROTECTED]>
> > > > > > > > > Sent: Monday, June 18, 2001 11:00 AM
> > > > > > > > > Subject: Checking for Empty Result Set
> > > > > > > > >
> > > > > > > > >
> > > > > > > > > > Hello,
> > > > > > > > > > Which is the best method for
> > checking
> > > > > > whether a
> > > > > > > > > Result
> > > > > > > > > > Set is empty ?
> > > > > > > > > >
> > > > > > > > > > ResultSet rs =
> > prestmt.exeucteUpdate();
> > > > > > > > > > Checking for rs.isBeforeFirst()
> > > > returning
> > > > > > false
> > > > > > > > > does
> > > > > > > > > > not seem to work always....
> > > > > > > > > > Thanks in advance,
> > > > > > > > > > Sunil.
> > > > > > > > > >
> > > > > > > > > >
> > > > > > > > > >
> >
> === message truncated ===
>
>
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