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mysql.pm
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#!/usr/bin/perl
use strict;
use warnings;
require 5.008_001; # just as DBI
package DBD::mysql;
use DBI;
use DynaLoader();
use Carp;
our @ISA = qw(DynaLoader);
# please make sure the sub-version does not increase above '099'
# SQL_DRIVER_VER is formatted as dd.dd.dddd
# for version 5.x please switch to 5.00(_00) version numbering
# keep $VERSION in Bundle/DBD/mysql.pm in sync
our $VERSION = '4.050';
bootstrap DBD::mysql $VERSION;
our $err = 0; # holds error code for DBI::err
our $errstr = ""; # holds error string for DBI::errstr
our $drh = undef; # holds driver handle once initialised
my $methods_are_installed = 0;
sub driver{
return $drh if $drh;
my($class, $attr) = @_;
$class .= "::dr";
# not a 'my' since we use it above to prevent multiple drivers
$drh = DBI::_new_drh($class, { 'Name' => 'mysql',
'Version' => $VERSION,
'Err' => \$DBD::mysql::err,
'Errstr' => \$DBD::mysql::errstr,
'Attribution' => 'DBD::mysql by Patrick Galbraith'
});
if (!$methods_are_installed) {
DBD::mysql::db->install_method('mysql_fd');
DBD::mysql::db->install_method('mysql_async_result');
DBD::mysql::db->install_method('mysql_async_ready');
DBD::mysql::st->install_method('mysql_async_result');
DBD::mysql::st->install_method('mysql_async_ready');
$methods_are_installed++;
}
$drh;
}
sub CLONE {
undef $drh;
}
sub _OdbcParse($$$) {
my($class, $dsn, $hash, $args) = @_;
if (!defined($dsn)) {
return;
}
for my $keyval (split/[:;]/, $dsn) {
$keyval =~ s/\[|]//g; # Remove [] if present, the rest of the code prefers plain IPv6 addresses
my ($var, $val) = map {s/^\s*([^\s]*)\s*$/$1/r} split /=/, $keyval;
if (defined $val) {
if ($var eq 'hostname' || $var eq 'host') {
$hash->{'host'} = $val;
} elsif ($var eq 'db' || $var eq 'dbname') {
$hash->{'database'} = $val;
} else {
$hash->{$var} = $val;
}
} else {
foreach $var (@$args) {
if (!defined($hash->{$var})) {
$hash->{$var} = $val;
last;
}
}
}
}
}
sub _OdbcParseHost ($$) {
my($class, $dsn) = @_;
my($hash) = {};
$class->_OdbcParse($dsn, $hash, ['host', 'port']);
($hash->{'host'}, $hash->{'port'});
}
sub AUTOLOAD {
my ($meth) = $DBD::mysql::AUTOLOAD;
my ($smeth) = $meth;
$smeth =~ s/(.*)\:\://;
my $val = constant($smeth, @_ ? $_[0] : 0);
if ($! == 0) { eval "sub $meth { $val }"; return $val; }
Carp::croak "$meth: Not defined";
}
1;
package DBD::mysql::dr; # ====== DRIVER ======
use strict;
use DBI qw(:sql_types);
use DBI::Const::GetInfoType;
sub connect {
my($drh, $dsn, $username, $password, $attrhash) = @_;
my($port);
my($cWarn);
my $connect_ref= { 'Name' => $dsn };
my $dbi_imp_data;
# Avoid warnings for undefined values
$username ||= '';
$password ||= '';
$attrhash ||= {};
$attrhash->{mysql_conn_attrs} ||= {};
$attrhash->{mysql_conn_attrs}->{'program_name'} ||= $0;
# create a 'blank' dbh
my($this, $privateAttrHash) = (undef, $attrhash);
$privateAttrHash = { %$privateAttrHash,
'Name' => $dsn,
'user' => $username,
'password' => $password
};
DBD::mysql->_OdbcParse($dsn, $privateAttrHash,
['database', 'host', 'port']);
$dbi_imp_data = delete $attrhash->{dbi_imp_data};
$connect_ref->{'dbi_imp_data'} = $dbi_imp_data;
if (!defined($this = DBI::_new_dbh($drh,
$connect_ref,
$privateAttrHash)))
{
return undef;
}
DBD::mysql::db::_login($this, $dsn, $username, $password)
or $this = undef;
if ($this && ($ENV{MOD_PERL} || $ENV{GATEWAY_INTERFACE})) {
$this->{mysql_auto_reconnect} = 1;
}
$this;
}
sub data_sources {
my($self) = shift;
my($attributes) = shift;
my($host, $port, $user, $password) = ('', '', '', '');
if ($attributes) {
$host = $attributes->{host} || '';
$port = $attributes->{port} || '';
$user = $attributes->{user} || '';
$password = $attributes->{password} || '';
}
my(@dsn) = $self->func($host, $port, $user, $password, '_ListDBs');
my($i);
for ($i = 0; $i < @dsn; $i++) {
$dsn[$i] = "DBI:mysql:$dsn[$i]";
}
@dsn;
}
sub admin {
my($drh) = shift;
my($command) = shift;
my($dbname) = ($command eq 'createdb' || $command eq 'dropdb') ?
shift : '';
my($host, $port) = DBD::mysql->_OdbcParseHost(shift(@_) || '');
my($user) = shift || '';
my($password) = shift || '';
$drh->func(undef, $command,
$dbname || '',
$host || '',
$port || '',
$user, $password, '_admin_internal');
}
package DBD::mysql::db; # ====== DATABASE ======
use strict;
use DBI qw(:sql_types);
%DBD::mysql::db::db2ANSI = (
"INT" => "INTEGER",
"CHAR" => "CHAR",
"REAL" => "REAL",
"IDENT" => "DECIMAL"
);
### ANSI datatype mapping to MySQL datatypes
%DBD::mysql::db::ANSI2db = (
"CHAR" => "CHAR",
"VARCHAR" => "CHAR",
"LONGVARCHAR" => "CHAR",
"NUMERIC" => "INTEGER",
"DECIMAL" => "INTEGER",
"BIT" => "INTEGER",
"TINYINT" => "INTEGER",
"SMALLINT" => "INTEGER",
"INTEGER" => "INTEGER",
"BIGINT" => "INTEGER",
"REAL" => "REAL",
"FLOAT" => "REAL",
"DOUBLE" => "REAL",
"BINARY" => "CHAR",
"VARBINARY" => "CHAR",
"LONGVARBINARY" => "CHAR",
"DATE" => "CHAR",
"TIME" => "CHAR",
"TIMESTAMP" => "CHAR"
);
sub prepare {
my($dbh, $statement, $attribs)= @_;
return unless $dbh->func('_async_check');
# create a 'blank' dbh
my $sth = DBI::_new_sth($dbh, {'Statement' => $statement});
# Populate internal handle data.
if (!DBD::mysql::st::_prepare($sth, $statement, $attribs)) {
$sth = undef;
}
$sth;
}
sub db2ANSI {
my $self = shift;
my $type = shift;
return $DBD::mysql::db::db2ANSI{"$type"};
}
sub ANSI2db {
my $self = shift;
my $type = shift;
return $DBD::mysql::db::ANSI2db{"$type"};
}
sub admin {
my($dbh) = shift;
my($command) = shift;
my($dbname) = ($command eq 'createdb' || $command eq 'dropdb') ?
shift : '';
$dbh->{'Driver'}->func($dbh, $command, $dbname, '', '', '',
'_admin_internal');
}
sub _SelectDB ($$) {
die "_SelectDB is removed from this module; use DBI->connect instead.";
}
sub table_info ($) {
my ($dbh, $catalog, $schema, $table, $type, $attr) = @_;
$dbh->{mysql_server_prepare}||= 0;
my $mysql_server_prepare_save= $dbh->{mysql_server_prepare};
$dbh->{mysql_server_prepare}= 0;
my @names = qw(TABLE_CAT TABLE_SCHEM TABLE_NAME TABLE_TYPE REMARKS);
my @rows;
my $sponge = DBI->connect("DBI:Sponge:", '','')
or return $dbh->DBI::set_err($DBI::err, "DBI::Sponge: $DBI::errstr");
# Return the list of catalogs
if (defined $catalog && $catalog eq "%" &&
(!defined($schema) || $schema eq "") &&
(!defined($table) || $table eq ""))
{
@rows = (); # Empty, because MySQL doesn't support catalogs (yet)
}
# Return the list of schemas
elsif (defined $schema && $schema eq "%" &&
(!defined($catalog) || $catalog eq "") &&
(!defined($table) || $table eq ""))
{
my $sth = $dbh->prepare("SHOW DATABASES")
or ($dbh->{mysql_server_prepare}= $mysql_server_prepare_save &&
return undef);
$sth->execute()
or ($dbh->{mysql_server_prepare}= $mysql_server_prepare_save &&
return DBI::set_err($dbh, $sth->err(), $sth->errstr()));
while (my $ref = $sth->fetchrow_arrayref())
{
push(@rows, [ undef, $ref->[0], undef, undef, undef ]);
}
}
# Return the list of table types
elsif (defined $type && $type eq "%" &&
(!defined($catalog) || $catalog eq "") &&
(!defined($schema) || $schema eq "") &&
(!defined($table) || $table eq ""))
{
@rows = (
[ undef, undef, undef, "TABLE", undef ],
[ undef, undef, undef, "VIEW", undef ],
);
}
# Special case: a catalog other than undef, "", or "%"
elsif (defined $catalog && $catalog ne "" && $catalog ne "%")
{
@rows = (); # Nothing, because MySQL doesn't support catalogs yet.
}
# Uh oh, we actually have a meaty table_info call. Work is required!
else
{
my @schemas;
# If no table was specified, we want them all
$table ||= "%";
# If something was given for the schema, we need to expand it to
# a list of schemas, since it may be a wildcard.
if (defined $schema && $schema ne "")
{
my $sth = $dbh->prepare("SHOW DATABASES LIKE " .
$dbh->quote($schema))
or ($dbh->{mysql_server_prepare}= $mysql_server_prepare_save &&
return undef);
$sth->execute()
or ($dbh->{mysql_server_prepare}= $mysql_server_prepare_save &&
return DBI::set_err($dbh, $sth->err(), $sth->errstr()));
while (my $ref = $sth->fetchrow_arrayref())
{
push @schemas, $ref->[0];
}
}
# Otherwise we want the current database
else
{
push @schemas, $dbh->selectrow_array("SELECT DATABASE()");
}
# Figure out which table types are desired
my ($want_tables, $want_views);
if (defined $type && $type ne "")
{
$want_tables = ($type =~ m/table/i);
$want_views = ($type =~ m/view/i);
}
else
{
$want_tables = $want_views = 1;
}
for my $database (@schemas)
{
my $sth = $dbh->prepare("SHOW /*!50002 FULL*/ TABLES FROM " .
$dbh->quote_identifier($database) .
" LIKE " . $dbh->quote($table))
or ($dbh->{mysql_server_prepare}= $mysql_server_prepare_save &&
return undef);
$sth->execute() or
($dbh->{mysql_server_prepare}= $mysql_server_prepare_save &&
return DBI::set_err($dbh, $sth->err(), $sth->errstr()));
while (my $ref = $sth->fetchrow_arrayref())
{
my $type = (defined $ref->[1] &&
$ref->[1] =~ /view/i) ? 'VIEW' : 'TABLE';
next if $type eq 'TABLE' && not $want_tables;
next if $type eq 'VIEW' && not $want_views;
push @rows, [ undef, $database, $ref->[0], $type, undef ];
}
}
}
my $sth = $sponge->prepare("table_info",
{
rows => \@rows,
NUM_OF_FIELDS => scalar @names,
NAME => \@names,
})
or ($dbh->{mysql_server_prepare}= $mysql_server_prepare_save &&
return $dbh->DBI::set_err($sponge->err(), $sponge->errstr()));
$dbh->{mysql_server_prepare}= $mysql_server_prepare_save;
return $sth;
}
sub _ListTables {
my $dbh = shift;
if (!$DBD::mysql::QUIET) {
warn "_ListTables is deprecated, use \$dbh->tables()";
}
return map { $_ =~ s/.*\.//; $_ } $dbh->tables();
}
sub column_info {
my ($dbh, $catalog, $schema, $table, $column) = @_;
return unless $dbh->func('_async_check');
$dbh->{mysql_server_prepare}||= 0;
my $mysql_server_prepare_save= $dbh->{mysql_server_prepare};
$dbh->{mysql_server_prepare}= 0;
# ODBC allows a NULL to mean all columns, so we'll accept undef
$column = '%' unless defined $column;
my $ER_NO_SUCH_TABLE= 1146;
my $table_id = $dbh->quote_identifier($catalog, $schema, $table);
my @names = qw(
TABLE_CAT TABLE_SCHEM TABLE_NAME COLUMN_NAME
DATA_TYPE TYPE_NAME COLUMN_SIZE BUFFER_LENGTH DECIMAL_DIGITS
NUM_PREC_RADIX NULLABLE REMARKS COLUMN_DEF
SQL_DATA_TYPE SQL_DATETIME_SUB CHAR_OCTET_LENGTH
ORDINAL_POSITION IS_NULLABLE CHAR_SET_CAT
CHAR_SET_SCHEM CHAR_SET_NAME COLLATION_CAT COLLATION_SCHEM COLLATION_NAME
UDT_CAT UDT_SCHEM UDT_NAME DOMAIN_CAT DOMAIN_SCHEM DOMAIN_NAME
SCOPE_CAT SCOPE_SCHEM SCOPE_NAME MAX_CARDINALITY
DTD_IDENTIFIER IS_SELF_REF
mysql_is_pri_key mysql_type_name mysql_values
mysql_is_auto_increment
);
my %col_info;
local $dbh->{FetchHashKeyName} = 'NAME_lc';
# only ignore ER_NO_SUCH_TABLE in internal_execute if issued from here
my $desc_sth = $dbh->prepare("DESCRIBE $table_id " . $dbh->quote($column));
my $desc = $dbh->selectall_arrayref($desc_sth, { Columns=>{} });
#return $desc_sth if $desc_sth->err();
if (my $err = $desc_sth->err())
{
# return the error, unless it is due to the table not
# existing per DBI spec
if ($err != $ER_NO_SUCH_TABLE)
{
$dbh->{mysql_server_prepare}= $mysql_server_prepare_save;
return undef;
}
$dbh->set_err(undef,undef);
$desc = [];
}
my $ordinal_pos = 0;
my @fields;
for my $row (@$desc)
{
my $type = $row->{type};
$type =~ m/^(\w+)(\((.+)\))?\s?(.*)?$/;
my $basetype = lc($1);
my $typemod = $3;
my $attr = $4;
push @fields, $row->{field};
my $info = $col_info{ $row->{field} }= {
TABLE_CAT => $catalog,
TABLE_SCHEM => $schema,
TABLE_NAME => $table,
COLUMN_NAME => $row->{field},
NULLABLE => ($row->{null} eq 'YES') ? 1 : 0,
IS_NULLABLE => ($row->{null} eq 'YES') ? "YES" : "NO",
TYPE_NAME => uc($basetype),
COLUMN_DEF => $row->{default},
ORDINAL_POSITION => ++$ordinal_pos,
mysql_is_pri_key => ($row->{key} eq 'PRI'),
mysql_type_name => $row->{type},
mysql_is_auto_increment => ($row->{extra} =~ /auto_increment/i ? 1 : 0),
};
#
# This code won't deal with a pathological case where a value
# contains a single quote followed by a comma, and doesn't unescape
# any escaped values. But who would use those in an enum or set?
#
my @type_params= ($typemod && index($typemod,"'")>=0) ?
("$typemod," =~ /'(.*?)',/g) # assume all are quoted
: split /,/, $typemod||''; # no quotes, plain list
s/''/'/g for @type_params; # undo doubling of quotes
my @type_attr= split / /, $attr||'';
$info->{DATA_TYPE}= SQL_VARCHAR();
if ($basetype =~ /^(char|varchar|\w*text|\w*blob)/)
{
$info->{DATA_TYPE}= SQL_CHAR() if $basetype eq 'char';
if ($type_params[0])
{
$info->{COLUMN_SIZE} = $type_params[0];
}
else
{
$info->{COLUMN_SIZE} = 65535;
$info->{COLUMN_SIZE} = 255 if $basetype =~ /^tiny/;
$info->{COLUMN_SIZE} = 16777215 if $basetype =~ /^medium/;
$info->{COLUMN_SIZE} = 4294967295 if $basetype =~ /^long/;
}
}
elsif ($basetype =~ /^(binary|varbinary)/)
{
$info->{COLUMN_SIZE} = $type_params[0];
# SQL_BINARY & SQL_VARBINARY are tempting here but don't match the
# semantics for mysql (not hex). SQL_CHAR & SQL_VARCHAR are correct here.
$info->{DATA_TYPE} = ($basetype eq 'binary') ? SQL_CHAR() : SQL_VARCHAR();
}
elsif ($basetype =~ /^(enum|set)/)
{
if ($basetype eq 'set')
{
$info->{COLUMN_SIZE} = length(join ",", @type_params);
}
else
{
my $max_len = 0;
length($_) > $max_len and $max_len = length($_) for @type_params;
$info->{COLUMN_SIZE} = $max_len;
}
$info->{"mysql_values"} = \@type_params;
}
elsif ($basetype =~ /int/ || $basetype eq 'bit' )
{
# big/medium/small/tiny etc + unsigned?
$info->{DATA_TYPE} = SQL_INTEGER();
$info->{NUM_PREC_RADIX} = 10;
$info->{COLUMN_SIZE} = $type_params[0];
}
elsif ($basetype =~ /^decimal/)
{
$info->{DATA_TYPE} = SQL_DECIMAL();
$info->{NUM_PREC_RADIX} = 10;
$info->{COLUMN_SIZE} = $type_params[0];
$info->{DECIMAL_DIGITS} = $type_params[1];
}
elsif ($basetype =~ /^(float|double)/)
{
$info->{DATA_TYPE} = ($basetype eq 'float') ? SQL_FLOAT() : SQL_DOUBLE();
$info->{NUM_PREC_RADIX} = 2;
$info->{COLUMN_SIZE} = ($basetype eq 'float') ? 32 : 64;
}
elsif ($basetype =~ /date|time/)
{
# date/datetime/time/timestamp
if ($basetype eq 'time' or $basetype eq 'date')
{
#$info->{DATA_TYPE} = ($basetype eq 'time') ? SQL_TYPE_TIME() : SQL_TYPE_DATE();
$info->{DATA_TYPE} = ($basetype eq 'time') ? SQL_TIME() : SQL_DATE();
$info->{COLUMN_SIZE} = ($basetype eq 'time') ? 8 : 10;
}
else
{
# datetime/timestamp
#$info->{DATA_TYPE} = SQL_TYPE_TIMESTAMP();
$info->{DATA_TYPE} = SQL_TIMESTAMP();
$info->{SQL_DATA_TYPE} = SQL_DATETIME();
$info->{SQL_DATETIME_SUB} = $info->{DATA_TYPE} - ($info->{SQL_DATA_TYPE} * 10);
$info->{COLUMN_SIZE} = ($basetype eq 'datetime') ? 19 : $type_params[0] || 14;
}
$info->{DECIMAL_DIGITS}= 0; # no fractional seconds
}
elsif ($basetype eq 'year')
{
# no close standard so treat as int
$info->{DATA_TYPE} = SQL_INTEGER();
$info->{NUM_PREC_RADIX} = 10;
$info->{COLUMN_SIZE} = 4;
}
else
{
Carp::carp("column_info: unrecognized column type '$basetype' of $table_id.$row->{field} treated as varchar");
}
$info->{SQL_DATA_TYPE} ||= $info->{DATA_TYPE};
#warn Dumper($info);
}
my $sponge = DBI->connect("DBI:Sponge:", '','')
or ( $dbh->{mysql_server_prepare}= $mysql_server_prepare_save &&
return $dbh->DBI::set_err($DBI::err, "DBI::Sponge: $DBI::errstr"));
my $sth = $sponge->prepare("column_info $table", {
rows => [ map { [ @{$_}{@names} ] } map { $col_info{$_} } @fields ],
NUM_OF_FIELDS => scalar @names,
NAME => \@names,
}) or
return ($dbh->{mysql_server_prepare}= $mysql_server_prepare_save &&
$dbh->DBI::set_err($sponge->err(), $sponge->errstr()));
$dbh->{mysql_server_prepare}= $mysql_server_prepare_save;
return $sth;
}
sub primary_key_info {
my ($dbh, $catalog, $schema, $table) = @_;
return unless $dbh->func('_async_check');
$dbh->{mysql_server_prepare}||= 0;
my $mysql_server_prepare_save= $dbh->{mysql_server_prepare};
my $table_id = $dbh->quote_identifier($catalog, $schema, $table);
my @names = qw(
TABLE_CAT TABLE_SCHEM TABLE_NAME COLUMN_NAME KEY_SEQ PK_NAME
);
my %col_info;
local $dbh->{FetchHashKeyName} = 'NAME_lc';
my $desc_sth = $dbh->prepare("SHOW KEYS FROM $table_id");
my $desc= $dbh->selectall_arrayref($desc_sth, { Columns=>{} });
my $ordinal_pos = 0;
for my $row (grep { $_->{key_name} eq 'PRIMARY'} @$desc)
{
$col_info{ $row->{column_name} }= {
TABLE_CAT => $catalog,
TABLE_SCHEM => $schema,
TABLE_NAME => $table,
COLUMN_NAME => $row->{column_name},
KEY_SEQ => $row->{seq_in_index},
PK_NAME => $row->{key_name},
};
}
my $sponge = DBI->connect("DBI:Sponge:", '','')
or
($dbh->{mysql_server_prepare}= $mysql_server_prepare_save &&
return $dbh->DBI::set_err($DBI::err, "DBI::Sponge: $DBI::errstr"));
my $sth= $sponge->prepare("primary_key_info $table", {
rows => [
map { [ @{$_}{@names} ] }
sort { $a->{KEY_SEQ} <=> $b->{KEY_SEQ} }
values %col_info
],
NUM_OF_FIELDS => scalar @names,
NAME => \@names,
}) or
($dbh->{mysql_server_prepare}= $mysql_server_prepare_save &&
return $dbh->DBI::set_err($sponge->err(), $sponge->errstr()));
$dbh->{mysql_server_prepare}= $mysql_server_prepare_save;
return $sth;
}
sub foreign_key_info {
my ($dbh,
$pk_catalog, $pk_schema, $pk_table,
$fk_catalog, $fk_schema, $fk_table,
) = @_;
return unless $dbh->func('_async_check');
# INFORMATION_SCHEMA.KEY_COLUMN_USAGE was added in 5.0.6
# no one is going to be running 5.0.6, taking out the check for $point > .6
my ($maj, $min, $point) = _version($dbh);
return if $maj < 5 ;
my $sql = <<'EOF';
SELECT NULL AS PKTABLE_CAT,
A.REFERENCED_TABLE_SCHEMA AS PKTABLE_SCHEM,
A.REFERENCED_TABLE_NAME AS PKTABLE_NAME,
A.REFERENCED_COLUMN_NAME AS PKCOLUMN_NAME,
A.TABLE_CATALOG AS FKTABLE_CAT,
A.TABLE_SCHEMA AS FKTABLE_SCHEM,
A.TABLE_NAME AS FKTABLE_NAME,
A.COLUMN_NAME AS FKCOLUMN_NAME,
A.ORDINAL_POSITION AS KEY_SEQ,
NULL AS UPDATE_RULE,
NULL AS DELETE_RULE,
A.CONSTRAINT_NAME AS FK_NAME,
NULL AS PK_NAME,
NULL AS DEFERABILITY,
NULL AS UNIQUE_OR_PRIMARY
FROM INFORMATION_SCHEMA.KEY_COLUMN_USAGE A,
INFORMATION_SCHEMA.TABLE_CONSTRAINTS B
WHERE A.TABLE_SCHEMA = B.TABLE_SCHEMA AND A.TABLE_NAME = B.TABLE_NAME
AND A.CONSTRAINT_NAME = B.CONSTRAINT_NAME AND B.CONSTRAINT_TYPE IS NOT NULL
EOF
my @where;
my @bind;
# catalogs are not yet supported by MySQL
# if (defined $pk_catalog) {
# push @where, 'A.REFERENCED_TABLE_CATALOG = ?';
# push @bind, $pk_catalog;
# }
if (defined $pk_schema) {
push @where, 'A.REFERENCED_TABLE_SCHEMA = ?';
push @bind, $pk_schema;
}
if (defined $pk_table) {
push @where, 'A.REFERENCED_TABLE_NAME = ?';
push @bind, $pk_table;
}
# if (defined $fk_catalog) {
# push @where, 'A.TABLE_CATALOG = ?';
# push @bind, $fk_schema;
# }
if (defined $fk_schema) {
push @where, 'A.TABLE_SCHEMA = ?';
push @bind, $fk_schema;
}
if (defined $fk_table) {
push @where, 'A.TABLE_NAME = ?';
push @bind, $fk_table;
}
if (@where) {
$sql .= ' AND ';
$sql .= join ' AND ', @where;
}
$sql .= " ORDER BY A.TABLE_SCHEMA, A.TABLE_NAME, A.ORDINAL_POSITION";
local $dbh->{FetchHashKeyName} = 'NAME_uc';
my $sth = $dbh->prepare($sql);
$sth->execute(@bind);
return $sth;
}
# #86030: PATCH: adding statistics_info support
# Thank you to David Dick http://search.cpan.org/~ddick/
sub statistics_info {
my ($dbh,
$catalog, $schema, $table,
$unique_only, $quick,
) = @_;
return unless $dbh->func('_async_check');
# INFORMATION_SCHEMA.KEY_COLUMN_USAGE was added in 5.0.6
# no one is going to be running 5.0.6, taking out the check for $point > .6
my ($maj, $min, $point) = _version($dbh);
return if $maj < 5 ;
my $sql = <<'EOF';
SELECT TABLE_CATALOG AS TABLE_CAT,
TABLE_SCHEMA AS TABLE_SCHEM,
TABLE_NAME AS TABLE_NAME,
NON_UNIQUE AS NON_UNIQUE,
NULL AS INDEX_QUALIFIER,
INDEX_NAME AS INDEX_NAME,
LCASE(INDEX_TYPE) AS TYPE,
SEQ_IN_INDEX AS ORDINAL_POSITION,
COLUMN_NAME AS COLUMN_NAME,
COLLATION AS ASC_OR_DESC,
CARDINALITY AS CARDINALITY,
NULL AS PAGES,
NULL AS FILTER_CONDITION
FROM INFORMATION_SCHEMA.STATISTICS
EOF
my @where;
my @bind;
# catalogs are not yet supported by MySQL
# if (defined $catalog) {
# push @where, 'TABLE_CATALOG = ?';
# push @bind, $catalog;
# }
if (defined $schema) {
push @where, 'TABLE_SCHEMA = ?';
push @bind, $schema;
}
if (defined $table) {
push @where, 'TABLE_NAME = ?';
push @bind, $table;
}
if (@where) {
$sql .= ' WHERE ';
$sql .= join ' AND ', @where;
}
$sql .= " ORDER BY TABLE_SCHEMA, TABLE_NAME, ORDINAL_POSITION";
local $dbh->{FetchHashKeyName} = 'NAME_uc';
my $sth = $dbh->prepare($sql);
$sth->execute(@bind);
return $sth;
}
sub _version {
my $dbh = shift;
return
$dbh->get_info($DBI::Const::GetInfoType::GetInfoType{SQL_DBMS_VER})
=~ /(\d+)\.(\d+)\.(\d+)/;
}
####################
# get_info()
# Generated by DBI::DBD::Metadata
sub get_info {
my($dbh, $info_type) = @_;
return unless $dbh->func('_async_check');
require DBD::mysql::GetInfo;
my $v = $DBD::mysql::GetInfo::info{int($info_type)};
$v = $v->($dbh) if ref $v eq 'CODE';
return $v;
}
BEGIN {
my @needs_async_check = qw/data_sources quote_identifier begin_work/;
foreach my $method (@needs_async_check) {
no strict 'refs';
my $super = "SUPER::$method";
*$method = sub {
my $h = shift;
return unless $h->func('_async_check');
return $h->$super(@_);
};
}
}
package DBD::mysql::st; # ====== STATEMENT ======
use strict;
BEGIN {
my @needs_async_result = qw/fetchrow_hashref fetchall_hashref/;
my @needs_async_check = qw/bind_param_array bind_col bind_columns execute_for_fetch/;
foreach my $method (@needs_async_result) {
no strict 'refs';
my $super = "SUPER::$method";
*$method = sub {
my $sth = shift;
if(defined $sth->mysql_async_ready) {
return unless $sth->mysql_async_result;
}
return $sth->$super(@_);
};
}
foreach my $method (@needs_async_check) {
no strict 'refs';
my $super = "SUPER::$method";
*$method = sub {
my $h = shift;
return unless $h->func('_async_check');
return $h->$super(@_);
};
}
}
1;
__END__
=pod
=encoding utf8
=head1 NAME
DBD::mysql - MySQL driver for the Perl5 Database Interface (DBI)
=head1 SYNOPSIS
use DBI;
my $dsn = "DBI:mysql:database=$database;host=$hostname;port=$port";
my $dbh = DBI->connect($dsn, $user, $password);
my $sth = $dbh->prepare(
'SELECT id, first_name, last_name FROM authors WHERE last_name = ?')
or die "prepare statement failed: $dbh->errstr()";
$sth->execute('Eggers') or die "execution failed: $dbh->errstr()";
print $sth->rows . " rows found.\n";
while (my $ref = $sth->fetchrow_hashref()) {
print "Found a row: id = $ref->{'id'}, fn = $ref->{'first_name'}\n";
}
$sth->finish;
=head1 EXAMPLE
#!/usr/bin/perl
use strict;
use warnings;
use DBI;
# Connect to the database.
my $dbh = DBI->connect("DBI:mysql:database=test;host=localhost",
"joe", "joe's password",
{'RaiseError' => 1});
# Drop table 'foo'. This may fail, if 'foo' doesn't exist
# Thus we put an eval around it.
eval { $dbh->do("DROP TABLE foo") };
print "Dropping foo failed: $@\n" if $@;
# Create a new table 'foo'. This must not fail, thus we don't
# catch errors.
$dbh->do("CREATE TABLE foo (id INTEGER, name VARCHAR(20))");
# INSERT some data into 'foo'. We are using $dbh->quote() for
# quoting the name.
$dbh->do("INSERT INTO foo VALUES (1, " . $dbh->quote("Tim") . ")");
# same thing, but using placeholders (recommended!)
$dbh->do("INSERT INTO foo VALUES (?, ?)", undef, 2, "Jochen");
# now retrieve data from the table.
my $sth = $dbh->prepare("SELECT * FROM foo");
$sth->execute();
while (my $ref = $sth->fetchrow_hashref()) {
print "Found a row: id = $ref->{'id'}, name = $ref->{'name'}\n";
}
$sth->finish();
# Disconnect from the database.
$dbh->disconnect();
=head1 DESCRIPTION
B<DBD::mysql> is the Perl5 Database Interface driver for the MySQL
database. In other words: DBD::mysql is an interface between the Perl
programming language and the MySQL programming API that comes with
the MySQL relational database management system. Most functions
provided by this programming API are supported. Some rarely used
functions are missing, mainly because no-one ever requested
them. :-)
In what follows we first discuss the use of DBD::mysql,
because this is what you will need the most. For installation, see the
separate document L<DBD::mysql::INSTALL>.
See L</"EXAMPLE"> for a simple example above.
From perl you activate the interface with the statement
use DBI;
After that you can connect to multiple MySQL database servers
and send multiple queries to any of them via a simple object oriented
interface. Two types of objects are available: database handles and
statement handles. Perl returns a database handle to the connect
method like so:
$dbh = DBI->connect("DBI:mysql:database=$db;host=$host",
$user, $password, {RaiseError => 1});
Once you have connected to a database, you can execute SQL
statements with:
my $query = sprintf("INSERT INTO foo VALUES (%d, %s)",
$number, $dbh->quote("name"));
$dbh->do($query);
See L<DBI> for details on the quote and do methods. An alternative
approach is
$dbh->do("INSERT INTO foo VALUES (?, ?)", undef,
$number, $name);
in which case the quote method is executed automatically. See also
the bind_param method in L<DBI>. See L</"DATABASE HANDLES"> below
for more details on database handles.
If you want to retrieve results, you need to create a so-called
statement handle with:
$sth = $dbh->prepare("SELECT * FROM $table");
$sth->execute();
This statement handle can be used for multiple things. First of all
you can retrieve a row of data:
my $row = $sth->fetchrow_hashref();