I'm trying to store binary data that contains NUL ("\x00") characters into
a BLOB column of a SQLite 3 database. SQLite documentation says that
BLOB's can contain NUL characters, but I get the data truncated at
first ocurrence of NUL. I'm missing something? Should I always encode the data before the insert? Or this is a bug of DBD::SQLite?
Thanks in advance,
José
The following code outputs just "ABC" (using DBD::SQLite 3.08):
use DBI;
my $dbh = DBI->connect('DBI:SQLite:dbname=test_blob.db', '', '');
$dbh->do('CREATE TABLE test_blob( Bindata BLOB )');
my $bindata = "ABC" . "\x00" . "DEF";
my $sth1 = $dbh->prepare('INSERT INTO test_blob VALUES(?)' );
$sth1->execute($bindata);
my $sth2 = $dbh->prepare('SELECT Bindata FROM test_blob');
$sth2->execute();
my $row = $sth2->fetch();
my $fetched_data = $row->[0];
$sth2->finish();
$dbh->disconnect;
print $fetched_data;
Update: A known workaround is to use bind_param() to force data type as
SQL_BLOB. For example:
use DBI qw(SQL_BLOB);
# ...
$sth = $dbh->prepare('INSERT INTO test_blob VALUES(?)' );
$sth->bind_param(1, $bindata, SQL_BLOB );
$sth->execute();
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