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- {
- package DBD::ExampleP;
-
- use Symbol;
-
- use DBI qw(:sql_types);
-
- @EXPORT = qw(); # Do NOT @EXPORT anything.
- $VERSION = sprintf("%d.%02d", q$Revision: 11.12 $ =~ /(\d+)\.(\d+)/o);
-
- # $Id: ExampleP.pm,v 11.12 2004/01/07 17:38:51 timbo Exp $
- #
- # 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
- $err = 0; # The $DBI::err value
- #$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, $auth)= @_;
- my($this) = DBI::_new_dbh($drh, {
- 'Name' => $dbname,
- 'User' => $user,
- examplep_get_info => {},
- });
- $this->STORE(Active => 1);
- $this;
- }
-
- sub data_sources {
- return ("dbi:ExampleP:dir=."); # possibly usefully meaningless
- }
-
- sub DESTROY { undef }
- }
-
-
- { 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 $dbh->set_err(1, "Syntax error in select statement (\"$statement\")")
- unless $statement =~ m/^\s*set\s+/;
- # the SET syntax is just a hack so the ExampleP driver can
- # be used to test non-select statements.
- # No we have DBI::DBM etc ExampleP should be deprecated
- }
-
- my ($outer, $inner) = DBI::_new_sth($dbh, {
- 'Statement' => $statement,
- }, ['example implementors private data '.__PACKAGE__]);
-
- my @bad = map {
- defined $DBD::ExampleP::statnames{$_} ? () : $_
- } @fields;
- return $dbh->set_err(1, "Unknown field names: @bad")
- if @bad;
-
- $outer->STORE('NUM_OF_FIELDS' => scalar(@fields));
-
- $inner->{'dbd_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 = $haveFileSpec ? File::Spec->curdir() : ".";
- my @list;
- if ($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 $file = readdir($dh))) {
- next unless -d $file;
- my($dev, $ino, $mode, $nlink, $uid) = lstat($file);
- my $pwnam = undef; # eval { scalar(getpwnam($uid)) } || $uid;
- push @list, [ $dir, $pwnam, $file, 'TABLE', undef ];
- }
- close($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 $ti;
- }
-
-
- sub disconnect {
- shift->STORE(Active => 0);
- return 1;
- }
-
-
- sub get_info {
- my ($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);
- }
-
- }
-
-
- { 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->{dbd_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;
- $sth->{dbd_datahandle} = Symbol::gensym(); # "DBD::ExampleP::".++$DBD::ExampleP::gensym;
- opendir($sth->{dbd_datahandle}, $dir)
- or return $sth->set_err(2, "opendir($dir): $!");
- }
- $sth->STORE(Active => 1);
- return 1;
- }
-
-
- sub fetch {
- my $sth = shift;
- my $dh = $sth->{dbd_datahandle};
- 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 $f = readdir($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);
- }
-
- sub DESTROY { undef }
-
- *parse_trace_flag = \&DBD::ExampleP::db::parse_trace_flag;
- }
-
- 1;
- # vim: sw=4:ts=8
-