/usr/share/perl5/DBIx/Class/SQLMaker/Oracle.pm is in libdbix-class-perl 0.08196-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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DBIx::Class::SQLMaker::Oracle;
use warnings;
use strict;
use base qw( DBIx::Class::SQLMaker );
BEGIN {
use DBIx::Class::Optional::Dependencies;
die('The following extra modules are required for Oracle-based Storages ' . DBIx::Class::Optional::Dependencies->req_missing_for ('id_shortener') . "\n" )
unless DBIx::Class::Optional::Dependencies->req_ok_for ('id_shortener');
}
sub new {
my $self = shift;
my %opts = (ref $_[0] eq 'HASH') ? %{$_[0]} : @_;
push @{$opts{special_ops}}, {
regex => qr/^prior$/i,
handler => '_where_field_PRIOR',
};
$self->next::method(\%opts);
}
sub _assemble_binds {
my $self = shift;
return map { @{ (delete $self->{"${_}_bind"}) || [] } } (qw/select from where oracle_connect_by group having order limit/);
}
sub _parse_rs_attrs {
my $self = shift;
my ($rs_attrs) = @_;
my ($cb_sql, @cb_bind) = $self->_connect_by($rs_attrs);
push @{$self->{oracle_connect_by_bind}}, @cb_bind;
my $sql = $self->next::method(@_);
return "$cb_sql $sql";
}
sub _connect_by {
my ($self, $attrs) = @_;
my $sql = '';
my @bind;
if ( ref($attrs) eq 'HASH' ) {
if ( $attrs->{'start_with'} ) {
my ($ws, @wb) = $self->_recurse_where( $attrs->{'start_with'} );
$sql .= $self->_sqlcase(' start with ') . $ws;
push @bind, @wb;
}
if ( my $connect_by = $attrs->{'connect_by'} || $attrs->{'connect_by_nocycle'} ) {
my ($connect_by_sql, @connect_by_sql_bind) = $self->_recurse_where( $connect_by );
$sql .= sprintf(" %s %s",
( $attrs->{'connect_by_nocycle'} ) ? $self->_sqlcase('connect by nocycle')
: $self->_sqlcase('connect by'),
$connect_by_sql,
);
push @bind, @connect_by_sql_bind;
}
if ( $attrs->{'order_siblings_by'} ) {
$sql .= $self->_order_siblings_by( $attrs->{'order_siblings_by'} );
}
}
return wantarray ? ($sql, @bind) : $sql;
}
sub _order_siblings_by {
my ( $self, $arg ) = @_;
my ( @sql, @bind );
for my $c ( $self->_order_by_chunks($arg) ) {
if (ref $c) {
push @sql, shift @$c;
push @bind, @$c;
}
else {
push @sql, $c;
}
}
my $sql =
@sql
? sprintf( '%s %s', $self->_sqlcase(' order siblings by'), join( ', ', @sql ) )
: '';
return wantarray ? ( $sql, @bind ) : $sql;
}
# we need to add a '=' only when PRIOR is used against a column diretly
# i.e. when it is invoked by a special_op callback
sub _where_field_PRIOR {
my ($self, $lhs, $op, $rhs) = @_;
my ($sql, @bind) = $self->_recurse_where ($rhs);
$sql = sprintf ('%s = %s %s ',
$self->_convert($self->_quote($lhs)),
$self->_sqlcase ($op),
$sql
);
return ($sql, @bind);
}
# use this codepath to hook all identifiers and mangle them if necessary
# this is invoked regardless of quoting being on or off
sub _quote {
my ($self, $label) = @_;
return '' unless defined $label;
return ${$label} if ref($label) eq 'SCALAR';
$label =~ s/ ( [^\.]{31,} ) /$self->_shorten_identifier($1)/gxe;
$self->next::method($label);
}
# this takes an identifier and shortens it if necessary
# optionally keywords can be passed as an arrayref to generate useful
# identifiers
sub _shorten_identifier {
my ($self, $to_shorten, $keywords) = @_;
# 30 characters is the identifier limit for Oracle
my $max_len = 30;
# we want at least 10 characters of the base36 md5
my $min_entropy = 10;
my $max_trunc = $max_len - $min_entropy - 1;
return $to_shorten
if length($to_shorten) <= $max_len;
$self->throw_exception("'keywords' needs to be an arrayref")
if defined $keywords && ref $keywords ne 'ARRAY';
# if no keywords are passed use the identifier as one
my @keywords = @{$keywords || []};
@keywords = $to_shorten unless @keywords;
# get a base36 md5 of the identifier
require Digest::MD5;
require Math::BigInt;
require Math::Base36;
my $b36sum = Math::Base36::encode_base36(
Math::BigInt->from_hex (
'0x' . Digest::MD5::md5_hex ($to_shorten)
)
);
# switch from perl to java
# get run-length
my ($concat_len, @lengths);
for (@keywords) {
$_ = ucfirst (lc ($_));
$_ =~ s/\_+(\w)/uc ($1)/eg;
push @lengths, length ($_);
$concat_len += $lengths[-1];
}
# if we are still too long - try to disemvowel non-capitals (not keyword starts)
if ($concat_len > $max_trunc) {
$concat_len = 0;
@lengths = ();
for (@keywords) {
$_ =~ s/[aeiou]//g;
push @lengths, length ($_);
$concat_len += $lengths[-1];
}
}
# still too long - just start cuting proportionally
if ($concat_len > $max_trunc) {
my $trim_ratio = $max_trunc / $concat_len;
for my $i (0 .. $#keywords) {
$keywords[$i] = substr ($keywords[$i], 0, int ($trim_ratio * $lengths[$i] ) );
}
}
my $fin = join ('', @keywords);
my $fin_len = length $fin;
return sprintf ('%s_%s',
$fin,
substr ($b36sum, 0, $max_len - $fin_len - 1),
);
}
sub _unqualify_colname {
my ($self, $fqcn) = @_;
return $self->_shorten_identifier($self->next::method($fqcn));
}
#
# Oracle has a different INSERT...RETURNING syntax
#
sub _insert_returning {
my ($self, $options) = @_;
my $f = $options->{returning};
my ($f_list, @f_names) = do {
if (! ref $f) {
(
$self->_quote($f),
$f,
)
}
elsif (ref $f eq 'ARRAY') {
(
(join ', ', map { $self->_quote($_) } @$f),
@$f,
)
}
elsif (ref $f eq 'SCALAR') {
(
$$f,
$$f,
)
}
else {
$self->throw_exception("Unsupported INSERT RETURNING option $f");
}
};
my $rc_ref = $options->{returning_container}
or $self->throw_exception('No returning container supplied for IR values');
@$rc_ref = (undef) x @f_names;
return (
( join (' ',
$self->_sqlcase(' returning'),
$f_list,
$self->_sqlcase('into'),
join (', ', ('?') x @f_names ),
)),
map {
$self->{bindtype} eq 'columns'
? [ $f_names[$_] => \$rc_ref->[$_] ]
: \$rc_ref->[$_]
} (0 .. $#f_names),
);
}
1;
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