Thank you. Using perl code to process the result sets is a solution, but I really want to know what is the reason for the failure and what parameter in DBI or MySQL control the result string length.

I like to let Database engine to do all the work if possible, esp. for any type of 'set' calculation, so that I don't need to process row by row. Your code can be simplified a bit with 'ROLLUP' in the query':

my $stmt = "SELECT prod, count(*) from prod GROUP BY prod WITH ROLLUP;
+";

$sth = $dbh->prepare( $stmt );
$sth->execute();

my %pivot;
while ( my ( $k, $v ) = $sth->fetchrow_array() ) {
   $k = 'Total' unless defined $k; 
   $k = 'Unknown' if $k eq '';
   $pivot{$k} = $v;
}

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In reply to Re^3: return string from query (DBI, MySQL) got truncated when trying to generating statement dynamically for MySQL by khandielas
in thread return string from query (DBI, MySQL) got truncated when trying to generating statement dynamically for MySQL by khandielas

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