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Top Forums Shell Programming and Scripting return number of rows selected Post 302102073 by cbkihong on Monday 8th of January 2007 08:12:13 AM
Old 01-08-2007
Quote:
Originally Posted by apoorvasharma80
Dear Anbu!
Thanks for the quick reply. The statment I am using is a Select one. can I use the do method on select statement also?
No. This is because no resultset is prepared with the do() method. Please refer to the manual page for DBI (http://search.cpan.org/~timb/DBI-1.53/DBI.pm#do)

Quote:
Prepare and execute a single statement. Returns the number of rows affected or undef on error. A return value of -1 means the number of rows is not known, not applicable, or not available.

This method is typically most useful for non-SELECT statements that either cannot be prepared in advance (due to a limitation of the driver) or do not need to be executed repeatedly. It should not be used for SELECT statements because it does not return a statement handle (so you can't fetch any data).
 

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Data::Stream::Bulk::DBI(3pm)				User Contributed Perl Documentation			      Data::Stream::Bulk::DBI(3pm)

NAME
Data::Stream::Bulk::DBI - N-at-a-time iteration of DBI statement results. VERSION
version 0.11 SYNOPSIS
use Data::Stream::Bulk::DBI; my $sth = $dbh->prepare("SELECT hate FROM sql"); # very big resultset $sth->execute; return Data::Stream::Bulk::DBI->new( sth => $sth, max_rows => $n, # how many at a time slice => [ ... ], # if you want to pass the first param to fetchall_arrayref ); DESCRIPTION
This implementation of Data::Stream::Bulk api works with DBI statement handles, using "fetchall_arrayref" in DBI. It fetches "max_rows" at a time (defaults to 500). ATTRIBUTES
sth The statement handle to call "fetchall_arrayref" on. slice Passed verbatim as the first param to "fetchall_arrayref". Should usually be "undef", provided for completetness. max_rows The second param to "fetchall_arrayref". Controls the size of each buffer. Defaults to 500. METHODS
get_more See Data::Stream::Bulk::DoneFlag. Calls "fetchall_arrayref" to get the next chunk of rows. all Calls "fetchall_arrayref" to get the raminder of the data (without specifying "max_rows"). AUTHOR
Yuval Kogman <nothingmuch@woobling.org> COPYRIGHT AND LICENSE
This software is copyright (c) 2012 by Yuval Kogman. This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself. perl v5.14.2 2012-02-14 Data::Stream::Bulk::DBI(3pm)
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