package # Hide from PAUSE
DBIx::Class::SQLAHacks::Oracle;
-use base qw( DBIx::Class::SQLAHacks );
-use Carp::Clan qw/^DBIx::Class|^SQL::Abstract/;
+use warnings;
+use strict;
-#
-# TODO:
-# - Problems with such statements: parentid != PRIOR artistid
-# - Check the parameter syntax of connect_by
-# - Review review by experienced DBIC/SQL:A developers :-)
-#
-
-sub new {
- my $self = shift->SUPER::new(@_);
-
- push @{ $self->{unary_ops} },{
- regex => qr/^prior$/,
- handler => '_prior_as_unary_op',
- };
-
- push @{ $self->{special_ops} },{
- regex => qr/^prior$/,
- handler => '_prior_as_special_op',
- };
-
- return $self;
-}
-
-
-sub select {
- my ($self, $table, $fields, $where, $order, @rest) = @_;
-
- $self->{_db_specific_attrs} = pop @rest;
-
- my ($sql, @bind) = $self->SUPER::select($table, $fields, $where, $order, @rest);
- push @bind, @{$self->{_oracle_connect_by_binds}};
-
- return wantarray ? ($sql, @bind) : $sql;
-}
-
-sub _emulate_limit {
- my ( $self, $syntax, $sql, $order, $rows, $offset ) = @_;
-
- my ($cb_sql, @cb_bind) = $self->_connect_by();
- $sql .= $cb_sql;
- $self->{_oracle_connect_by_binds} = \@cb_bind;
-
- return $self->SUPER::_emulate_limit($syntax, $sql, $order, $rows, $offset);
-}
-
-sub _connect_by {
- my ($self) = @_;
- my $attrs = $self->{_db_specific_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 = $attrs->{'connect_by'}) {
- my ($connect_by_sql, @connect_by_sql_bind) = $self->_recurse_where( $attrs->{'connect_by'} );
- $sql .= sprintf(" %s %s",
- $self->_sqlcase('connect by'),
- $connect_by_sql,
- );
- push @bind, @connect_by_sql_bind;
- # $sql .= $self->_sqlcase(' connect by');
- # foreach my $key ( keys %$connect_by ) {
- # $sql .= " $key = " . $connect_by->{$key};
- # }
- }
- 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 = shift;
- my $ref = ref $_[0];
-
- my @vals = $ref eq 'ARRAY' ? @{$_[0]} :
- $ref eq 'SCALAR' ? ${$_[0]} :
- $ref eq '' ? $_[0] :
- puke( "Unsupported data struct $ref for ORDER SIBILINGS BY" );
-
- my $val = join ', ', map { $self->_quote($_) } @vals;
- return $val ? $self->_sqlcase(' order siblings by')." $val" : '';
-}
-
-sub _prior_as_special_op {
- my ( $self, $field, $op, $arg ) = @_;
-
- my ( $label, $and, $placeholder );
- $label = $self->_convert( $self->_quote($field) );
- $and = ' ' . $self->_sqlcase('and') . ' ';
- $placeholder = $self->_convert('?');
-
- # TODO: $op is prior, and not the operator
- $op = $self->_sqlcase('=');
-
- my ( $sql, @bind ) = $self->_SWITCH_refkind(
- $arg,
- {
- SCALARREF => sub {
- my $sql = sprintf( "%s %s PRIOR %s", $label, $op, $$arg );
- return $sql;
- },
- SCALAR => sub {
- my $sql = sprintf( "%s %s PRIOR %s", $label, $op, $placeholder );
- return ( $sql, $arg );
- },
- HASHREF => sub { # case { '-prior' => { '=<' => 'nwiger'} }
- # no _convert and _quote from SCALARREF
- my ( $sql, @bind ) = $self->_where_hashpair_HASHREF( $field, $arg, $op );
- $sql = sprintf( " PRIOR %s", $sql );
- return ( $sql, @bind );
- },
- FALLBACK => sub {
- # TODO
- $self->puke(" wrong way... :/");
- },
- }
- );
- return ( $sql, @bind );
-}
-
-sub _prior_as_unary_op {
- my ( $self, $op, $arg ) = @_;
-
- my $placeholder = $self->_convert('?');
- my $and = ' ' . $self->_sqlcase('and') . ' ';
-
- my ( $sql, @bind ) = $self->_SWITCH_refkind(
- $arg,
- {
- ARRAYREF => sub {
- $self->puke("special op 'prior' accepts an arrayref with exactly two values")
- if @$arg != 2;
-
- my ( @all_sql, @all_bind );
-
- foreach my $val ( @{$arg} ) {
- my ( $sql, @bind ) = $self->_SWITCH_refkind($val,
- {
- SCALAR => sub {
- return ( $placeholder, ($val) );
- },
- SCALARREF => sub {
- return ( $$val, () );
- },
- }
- );
- push @all_sql, $sql;
- push @all_bind, @bind;
- }
- my $sql = sprintf("PRIOR %s ",join $self->_sqlcase('='), @all_sql);
- return ($sql,@all_bind);
- },
- FALLBACK => sub {
-
- # TODO
- $self->puke(" wrong way... :/ ");
- },
- }
- );
- return ( $sql, @bind );
-};
+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