use warnings;
use strict;
-use base qw( DBIx::Class::SQLAHacks );
-use Carp::Clan qw/^DBIx::Class|^SQL::Abstract/;
-
-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->SUPER::new (\%opts);
-}
-
-sub _assemble_binds {
- my $self = shift;
- return map { @{ (delete $self->{"${_}_bind"}) || [] } } (qw/from where oracle_connect_by having order/);
-}
-
-
-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 = $self->SUPER::_parse_rs_attrs(@_);
-
- return "$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) ) {
- $self->_SWITCH_refkind(
- $c,
- {
- SCALAR => sub { push @sql, $c },
- ARRAYREF => sub { push @sql, shift @$c; push @bind, @$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);
-}
-
-# 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;
-
- croak '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));
-}
+use base qw( DBIx::Class::SQLMaker::Oracle );
1;
-
-__END__
-
-=pod
-
-=head1 NAME
-
-DBIx::Class::SQLAHacks::Oracle - adds hierarchical query support for Oracle to SQL::Abstract
-
-=head1 DESCRIPTION
-
-See L<DBIx::Class::Storage::DBI::Oracle::Generic> for more informations about
-how to use hierarchical queries with DBIx::Class.
-
-=cut
projects / dbsrgits/DBIx-Class.git / blobdiff