Re^3: Counting number of rows while working with Oracle

Oh, I missed that bit about returning at most one row! He can simply use

my $row = $dbh->selectrow_arrayref($stmt_or_sth);
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my $row = $sth->fetch_arrayref();
$sth->finish();
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defined($row) will tell him if a row was returned. If the row only contains one field and it can't be NULL, then he could even use

my ($value) = $sth->fetch_array();
$sth->finish();
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defined($value) will tell him if a value was returned (again, assuming the value can't be NULL).

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Re^4: Counting number of rows while working with Oracle by denzil_cactus (Sexton) on Mar 18, 2008 at 12:12 UTC
Please tell me what happens if the query return more than one row. would `$sth->fetchall_arrayref();` work?	[reply] [d/l]
Re^5: Counting number of rows while working with Oracle by andreas1234567 (Vicar) on Mar 18, 2008 at 12:24 UTC
Please read the manual and tell us which part you don't understand. -- Andreas	[reply]
Re^6: Counting number of rows while working with Oracle by denzil_cactus (Sexton) on Mar 20, 2008 at 07:12 UTC
Andreas I have gone through the code and then only I started the things. Please follow the first thread I have posted Counting number of rows while working with Oracle the problem is I have to count the number of rows when I execute the query(Oracle) as we can do in perl with mysql `$num = mysql_num_rows($result);` after counting the rows I have to write the main logic and then I have to fetch all the rows. Hope you can understand my issue Thanks	[reply] [d/l]
Re^4: Counting number of rows while working with Oracle by denzil_cactus (Sexton) on Mar 18, 2008 at 11:02 UTC
Thanks for the replies I have tried the following code `my $rows = $sthBoo->fetchall_arrayref(); my $num_rows = @$rows;` [download] it worked I could see the number of rows but now if I use `while (my $row = $sth->fetchrow_hashref) {` [download] after the above code its giving the warning `DBD::Oracle::st fetchrow_hashref failed: no statement executing (perha +ps you need to call execute first) [for Statement "` [download] Is there any problem withthe code? Thanks	[reply] [d/l] [select]
Re^5: Counting number of rows while working with Oracle by ikegami (Patriarch) on Mar 18, 2008 at 12:52 UTC
That's why I followed those two lines with `foreach my $row (@$rows)` instead of `while (my $row = $sth->fetchrow_hashref)`.	[reply] [d/l] [select]
Re^5: Counting number of rows while working with Oracle by andreas1234567 (Vicar) on Mar 18, 2008 at 11:42 UTC
You did not post a complete, working code sample, so we can't say. Inspect your `$sth` vs. `$sthBoo` though. -- Andreas	[reply] [d/l] [select]
Re^6: Counting number of rows while working with Oracle by denzil_cactus (Sexton) on Mar 20, 2008 at 08:44 UTC
Here my code `my $req = <STDIN>; my $sth = $dbh->prepare( qq{ SELECT tr_code,j_trs from t_ghos } ) or die "Can't prepare statement: $DBI::errstr"; $sth->execute or die "Can't execute statement: $DBI::errstr"; my $rows = $sth->fetchall_arrayref(); my $num_rows = @$rows; if($num_rows > 0) { process($sth,$req); } sub process { my $sth = shift; my $type = shift; while (my $row = $sth->fetchrow_hashref) { next unless defined($row); } }` [download] Now please tell me any solution to count the number of rows	[reply] [d/l]