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c0024355 |
1 | package # Hide from PAUSE |
2 | DBIx::Class::SQLAHacks::Oracle; |
3 | |
4 | use base qw( DBIx::Class::SQLAHacks ); |
5 | use Carp::Clan qw/^DBIx::Class|^SQL::Abstract/; |
6 | |
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7 | # |
8 | # TODO: |
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9 | # - Review by experienced DBIC/SQL:A developers :-) |
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10 | # - Problem with count and connect_by look the TODO in t/73oracle.t |
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11 | # |
12 | |
c0024355 |
13 | sub select { |
14 | my ($self, $table, $fields, $where, $order, @rest) = @_; |
15 | |
16 | $self->{_db_specific_attrs} = pop @rest; |
17 | |
18 | my ($sql, @bind) = $self->SUPER::select($table, $fields, $where, $order, @rest); |
19 | push @bind, @{$self->{_oracle_connect_by_binds}}; |
20 | |
21 | return wantarray ? ($sql, @bind) : $sql; |
22 | } |
23 | |
24 | sub _emulate_limit { |
25 | my ( $self, $syntax, $sql, $order, $rows, $offset ) = @_; |
26 | |
27 | my ($cb_sql, @cb_bind) = $self->_connect_by(); |
28 | $sql .= $cb_sql; |
29 | $self->{_oracle_connect_by_binds} = \@cb_bind; |
30 | |
31 | return $self->SUPER::_emulate_limit($syntax, $sql, $order, $rows, $offset); |
32 | } |
33 | |
34 | sub _connect_by { |
35 | my ($self) = @_; |
36 | my $attrs = $self->{_db_specific_attrs}; |
37 | my $sql = ''; |
38 | my @bind; |
39 | |
40 | if ( ref($attrs) eq 'HASH' ) { |
41 | if ( $attrs->{'start_with'} ) { |
42 | my ($ws, @wb) = $self->_recurse_where( $attrs->{'start_with'} ); |
43 | $sql .= $self->_sqlcase(' start with ') . $ws; |
44 | push @bind, @wb; |
45 | } |
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46 | if ( my $connect_by = $attrs->{'connect_by'} ) { |
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47 | my ($connect_by_sql, @connect_by_sql_bind) = $self->_recurse_where( $attrs->{'connect_by'} ); |
48 | $sql .= sprintf(" %s %s", |
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49 | ( $attrs->{'nocycle'} ) ? $self->_sqlcase('connect by nocycle') |
50 | : $self->_sqlcase('connect by'), |
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51 | $connect_by_sql, |
52 | ); |
53 | push @bind, @connect_by_sql_bind; |
54 | # $sql .= $self->_sqlcase(' connect by'); |
55 | # foreach my $key ( keys %$connect_by ) { |
56 | # $sql .= " $key = " . $connect_by->{$key}; |
57 | # } |
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58 | } |
59 | if ( $attrs->{'order_siblings_by'} ) { |
60 | $sql .= $self->_order_siblings_by( $attrs->{'order_siblings_by'} ); |
61 | } |
62 | } |
63 | |
64 | return wantarray ? ($sql, @bind) : $sql; |
65 | } |
66 | |
67 | sub _order_siblings_by { |
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68 | my ( $self, $arg ) = @_; |
69 | |
70 | my ( @sql, @bind ); |
71 | for my $c ( $self->_order_by_chunks($arg) ) { |
72 | $self->_SWITCH_refkind( |
73 | $c, |
74 | { |
75 | SCALAR => sub { push @sql, $c }, |
76 | ARRAYREF => sub { push @sql, shift @$c; push @bind, @$c }, |
77 | } |
78 | ); |
79 | } |
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80 | |
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81 | my $sql = |
82 | @sql |
83 | ? sprintf( '%s %s', $self->_sqlcase(' order siblings by'), join( ', ', @sql ) ) |
84 | : ''; |
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85 | |
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86 | return wantarray ? ( $sql, @bind ) : $sql; |
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87 | } |
88 | |
89 | 1; |
90 | |
91 | __END__ |
92 | |
93 | =pod |
94 | |
95 | =head1 NAME |
96 | |
97 | DBIx::Class::SQLAHacks::Oracle - adds hierarchical query support for Oracle to SQL::Abstract |
98 | |
99 | =head1 DESCRIPTION |
100 | |
101 | See L<DBIx::Class::Storage::DBI::Oracle::Generic> for more informations about |
102 | how to use hierarchical queries with DBIx::Class. |
103 | |
104 | =cut |