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| Current File : //usr/local/lib/perl5/site_perl/5.8.9/mach/DBD/ExampleP.pm |
{
package DBD::ExampleP;
use Symbol;
use DBI qw(:sql_types);
@EXPORT = qw(); # Do NOT @EXPORT anything.
$VERSION = sprintf("12.%06d", q$Revision: 10007 $ =~ /(\d+)/o);
# $Id: ExampleP.pm 10007 2007-09-27 20:53:04Z timbo $
#
# Copyright (c) 1994,1997,1998 Tim Bunce
#
# You may distribute under the terms of either the GNU General Public
# License or the Artistic License, as specified in the Perl README file.
@statnames = qw(dev ino mode nlink
uid gid rdev size
atime mtime ctime
blksize blocks name);
@statnames{@statnames} = (0 .. @statnames-1);
@stattypes = (SQL_INTEGER, SQL_INTEGER, SQL_INTEGER, SQL_INTEGER,
SQL_INTEGER, SQL_INTEGER, SQL_INTEGER, SQL_INTEGER,
SQL_INTEGER, SQL_INTEGER, SQL_INTEGER,
SQL_INTEGER, SQL_INTEGER, SQL_VARCHAR);
@stattypes{@statnames} = @stattypes;
@statprec = ((10) x (@statnames-1), 1024);
@statprec{@statnames} = @statprec;
die unless @statnames == @stattypes;
die unless @statprec == @stattypes;
$drh = undef; # holds driver handle once initialised
#$gensym = "SYM000"; # used by st::execute() for filehandles
sub driver{
return $drh if $drh;
my($class, $attr) = @_;
$class .= "::dr";
($drh) = DBI::_new_drh($class, {
'Name' => 'ExampleP',
'Version' => $VERSION,
'Attribution' => 'DBD Example Perl stub by Tim Bunce',
}, ['example implementors private data '.__PACKAGE__]);
$drh;
}
sub CLONE {
undef $drh;
}
}
{ package DBD::ExampleP::dr; # ====== DRIVER ======
$imp_data_size = 0;
use strict;
sub connect { # normally overridden, but a handy default
my($drh, $dbname, $user, $auth)= @_;
my ($outer, $dbh) = DBI::_new_dbh($drh, {
Name => $dbname,
examplep_private_dbh_attrib => 42, # an example, for testing
});
$dbh->{examplep_get_info} = {
29 => '"', # SQL_IDENTIFIER_QUOTE_CHAR
41 => '.', # SQL_CATALOG_NAME_SEPARATOR
114 => 1, # SQL_CATALOG_LOCATION
};
#$dbh->{Name} = $dbname;
$dbh->STORE('Active', 1);
return $outer;
}
sub data_sources {
return ("dbi:ExampleP:dir=."); # possibly usefully meaningless
}
}
{ package DBD::ExampleP::db; # ====== DATABASE ======
$imp_data_size = 0;
use strict;
sub prepare {
my($dbh, $statement)= @_;
my @fields;
my($fields, $dir) = $statement =~ m/^\s*select\s+(.*?)\s+from\s+(\S*)/i;
if (defined $fields and defined $dir) {
@fields = ($fields eq '*')
? keys %DBD::ExampleP::statnames
: split(/\s*,\s*/, $fields);
}
else {
return $dbh->set_err($DBI::stderr, "Syntax error in select statement (\"$statement\")")
unless $statement =~ m/^\s*set\s+/;
# the SET syntax is just a hack so the ExampleP driver can
# be used to test non-select statements.
# Now we have DBI::DBM etc., ExampleP should be deprecated
}
my ($outer, $sth) = DBI::_new_sth($dbh, {
'Statement' => $statement,
examplep_private_sth_attrib => 24, # an example, for testing
}, ['example implementors private data '.__PACKAGE__]);
my @bad = map {
defined $DBD::ExampleP::statnames{$_} ? () : $_
} @fields;
return $dbh->set_err($DBI::stderr, "Unknown field names: @bad")
if @bad;
$outer->STORE('NUM_OF_FIELDS' => scalar(@fields));
$sth->{examplep_ex_dir} = $dir if defined($dir) && $dir !~ /\?/;
$outer->STORE('NUM_OF_PARAMS' => ($dir) ? $dir =~ tr/?/?/ : 0);
if (@fields) {
$outer->STORE('NAME' => \@fields);
$outer->STORE('NULLABLE' => [ (0) x @fields ]);
$outer->STORE('SCALE' => [ (0) x @fields ]);
}
$outer;
}
sub table_info {
my $dbh = shift;
my ($catalog, $schema, $table, $type) = @_;
my @types = split(/["']*,["']/, $type || 'TABLE');
my %types = map { $_=>$_ } @types;
# Return a list of all subdirectories
my $dh = Symbol::gensym(); # "DBD::ExampleP::".++$DBD::ExampleP::gensym;
my $haveFileSpec = eval { require File::Spec };
my $dir = $catalog || ($haveFileSpec ? File::Spec->curdir() : ".");
my @list;
if ($types{VIEW}) { # for use by test harness
push @list, [ undef, "schema", "table", 'VIEW', undef ];
push @list, [ undef, "sch-ema", "table", 'VIEW', undef ];
push @list, [ undef, "schema", "ta-ble", 'VIEW', undef ];
push @list, [ undef, "sch ema", "table", 'VIEW', undef ];
push @list, [ undef, "schema", "ta ble", 'VIEW', undef ];
}
if ($types{TABLE}) {
no strict 'refs';
opendir($dh, $dir)
or return $dbh->set_err(int($!), "Failed to open directory $dir: $!");
while (defined(my $item = readdir($dh))) {
if ($^O eq 'VMS') {
# if on VMS then avoid warnings from catdir if you use a file
# (not a dir) as the item below
next if $item !~ /\.dir$/oi;
}
my $file = ($haveFileSpec) ? File::Spec->catdir($dir,$item) : $item;
next unless -d $file;
my($dev, $ino, $mode, $nlink, $uid) = lstat($file);
my $pwnam = undef; # eval { scalar(getpwnam($uid)) } || $uid;
push @list, [ $dir, $pwnam, $item, 'TABLE', undef ];
}
close($dh);
}
# We would like to simply do a DBI->connect() here. However,
# this is wrong if we are in a subclass like DBI::ProxyServer.
$dbh->{'dbd_sponge_dbh'} ||= DBI->connect("DBI:Sponge:", '','')
or return $dbh->set_err($DBI::err,
"Failed to connect to DBI::Sponge: $DBI::errstr");
my $attr = {
'rows' => \@list,
'NUM_OF_FIELDS' => 5,
'NAME' => ['TABLE_CAT', 'TABLE_SCHEM', 'TABLE_NAME',
'TABLE_TYPE', 'REMARKS'],
'TYPE' => [DBI::SQL_VARCHAR(), DBI::SQL_VARCHAR(),
DBI::SQL_VARCHAR(), DBI::SQL_VARCHAR(), DBI::SQL_VARCHAR() ],
'NULLABLE' => [1, 1, 1, 1, 1]
};
my $sdbh = $dbh->{'dbd_sponge_dbh'};
my $sth = $sdbh->prepare("SHOW TABLES FROM $dir", $attr)
or return $dbh->set_err($sdbh->err(), $sdbh->errstr());
$sth;
}
sub type_info_all {
my ($dbh) = @_;
my $ti = [
{ TYPE_NAME => 0,
DATA_TYPE => 1,
COLUMN_SIZE => 2,
LITERAL_PREFIX => 3,
LITERAL_SUFFIX => 4,
CREATE_PARAMS => 5,
NULLABLE => 6,
CASE_SENSITIVE => 7,
SEARCHABLE => 8,
UNSIGNED_ATTRIBUTE=> 9,
FIXED_PREC_SCALE=> 10,
AUTO_UNIQUE_VALUE => 11,
LOCAL_TYPE_NAME => 12,
MINIMUM_SCALE => 13,
MAXIMUM_SCALE => 14,
},
[ 'VARCHAR', DBI::SQL_VARCHAR, 1024, "'","'", undef, 0, 1, 1, 0, 0,0,undef,0,0 ],
[ 'INTEGER', DBI::SQL_INTEGER, 10, "","", undef, 0, 0, 1, 0, 0,0,undef,0,0 ],
];
return $ti;
}
sub ping {
(shift->FETCH('Active')) ? 2 : 0; # the value 2 is checked for by t/80proxy.t
}
sub disconnect {
shift->STORE(Active => 0);
return 1;
}
sub get_info {
my ($dbh, $info_type) = @_;
return $dbh->{examplep_get_info}->{$info_type};
}
sub FETCH {
my ($dbh, $attrib) = @_;
# In reality this would interrogate the database engine to
# either return dynamic values that cannot be precomputed
# or fetch and cache attribute values too expensive to prefetch.
# else pass up to DBI to handle
return $INC{"DBD/ExampleP.pm"} if $attrib eq 'example_driver_path';
return $dbh->SUPER::FETCH($attrib);
}
sub STORE {
my ($dbh, $attrib, $value) = @_;
# would normally validate and only store known attributes
# else pass up to DBI to handle
if ($attrib eq 'AutoCommit') {
# convert AutoCommit values to magic ones to let DBI
# know that the driver has 'handled' the AutoCommit attribute
$value = ($value) ? -901 : -900;
}
return $dbh->{$attrib} = $value if $attrib =~ /^examplep_/;
return $dbh->SUPER::STORE($attrib, $value);
}
sub DESTROY {
my $dbh = shift;
$dbh->disconnect if $dbh->FETCH('Active');
undef
}
# This is an example to demonstrate the use of driver-specific
# methods via $dbh->func().
# Use it as follows:
# my @tables = $dbh->func($re, 'examplep_tables');
#
# Returns all the tables that match the regular expression $re.
sub examplep_tables {
my $dbh = shift; my $re = shift;
grep { $_ =~ /$re/ } $dbh->tables();
}
sub parse_trace_flag {
my ($h, $name) = @_;
return 0x01000000 if $name eq 'foo';
return 0x02000000 if $name eq 'bar';
return 0x04000000 if $name eq 'baz';
return 0x08000000 if $name eq 'boo';
return 0x10000000 if $name eq 'bop';
return $h->SUPER::parse_trace_flag($name);
}
sub private_attribute_info {
return { example_driver_path => undef };
}
}
{ package DBD::ExampleP::st; # ====== STATEMENT ======
$imp_data_size = 0;
use strict; no strict 'refs'; # cause problems with filehandles
my $haveFileSpec = eval { require File::Spec };
sub bind_param {
my($sth, $param, $value, $attribs) = @_;
$sth->{'dbd_param'}->[$param-1] = $value;
return 1;
}
sub execute {
my($sth, @dir) = @_;
my $dir;
if (@dir) {
$sth->bind_param($_, $dir[$_-1]) or return
foreach (1..@dir);
}
my $dbd_param = $sth->{'dbd_param'} || [];
return $sth->set_err(2, @$dbd_param." values bound when $sth->{NUM_OF_PARAMS} expected")
unless @$dbd_param == $sth->{NUM_OF_PARAMS};
return 0 unless $sth->{NUM_OF_FIELDS}; # not a select
$dir = $dbd_param->[0] || $sth->{examplep_ex_dir};
return $sth->set_err(2, "No bind parameter supplied")
unless defined $dir;
$sth->finish;
#
# If the users asks for directory "long_list_4532", then we fake a
# directory with files "file4351", "file4350", ..., "file0".
# This is a special case used for testing, especially DBD::Proxy.
#
if ($dir =~ /^long_list_(\d+)$/) {
$sth->{dbd_dir} = [ $1 ]; # array ref indicates special mode
$sth->{dbd_datahandle} = undef;
}
else {
$sth->{dbd_dir} = $dir;
my $sym = Symbol::gensym(); # "DBD::ExampleP::".++$DBD::ExampleP::gensym;
opendir($sym, $dir)
or return $sth->set_err(2, "opendir($dir): $!");
$sth->{dbd_datahandle} = $sym;
}
$sth->STORE(Active => 1);
return 1;
}
sub fetch {
my $sth = shift;
my $dir = $sth->{dbd_dir};
my %s;
if (ref $dir) { # special fake-data test mode
my $num = $dir->[0]--;
unless ($num > 0) {
$sth->finish();
return;
}
my $time = time;
@s{@DBD::ExampleP::statnames} =
( 2051, 1000+$num, 0644, 2, $>, $), 0, 1024,
$time, $time, $time, 512, 2, "file$num")
}
else { # normal mode
my $dh = $sth->{dbd_datahandle}
or return $sth->set_err($DBI::stderr, "fetch without successful execute");
my $f = readdir($dh);
unless ($f) {
$sth->finish;
return;
}
# untaint $f so that we can use this for DBI taint tests
($f) = ($f =~ m/^(.*)$/);
my $file = $haveFileSpec
? File::Spec->catfile($dir, $f) : "$dir/$f";
# put in all the data fields
@s{ @DBD::ExampleP::statnames } = (lstat($file), $f);
}
# return just what fields the query asks for
my @new = @s{ @{$sth->{NAME}} };
return $sth->_set_fbav(\@new);
}
*fetchrow_arrayref = \&fetch;
sub finish {
my $sth = shift;
closedir($sth->{dbd_datahandle}) if $sth->{dbd_datahandle};
$sth->{dbd_datahandle} = undef;
$sth->{dbd_dir} = undef;
$sth->SUPER::finish();
return 1;
}
sub FETCH {
my ($sth, $attrib) = @_;
# In reality this would interrogate the database engine to
# either return dynamic values that cannot be precomputed
# or fetch and cache attribute values too expensive to prefetch.
if ($attrib eq 'TYPE'){
return [ @DBD::ExampleP::stattypes{ @{ $sth->FETCH(q{NAME_lc}) } } ];
}
elsif ($attrib eq 'PRECISION'){
return [ @DBD::ExampleP::statprec{ @{ $sth->FETCH(q{NAME_lc}) } } ];
}
elsif ($attrib eq 'ParamValues') {
my $dbd_param = $sth->{dbd_param} || [];
my %pv = map { $_ => $dbd_param->[$_-1] } 1..@$dbd_param;
return \%pv;
}
# else pass up to DBI to handle
return $sth->SUPER::FETCH($attrib);
}
sub STORE {
my ($sth, $attrib, $value) = @_;
# would normally validate and only store known attributes
# else pass up to DBI to handle
return $sth->{$attrib} = $value
if $attrib eq 'NAME' or $attrib eq 'NULLABLE' or $attrib eq 'SCALE' or $attrib eq 'PRECISION';
return $sth->SUPER::STORE($attrib, $value);
}
*parse_trace_flag = \&DBD::ExampleP::db::parse_trace_flag;
}
1;
# vim: sw=4:ts=8