};
}
+sub register {
+ my ($self, @pairs) = @_;
+ my $sqla = $self->sqla;
+ while (my ($method, $cases) = splice(@pairs, 0, 2)) {
+ my @cases = @$cases;
+ while (my ($name, $case) = splice(@cases, 0, 2)) {
+ $sqla->$method($name, $self->cb($case));
+ }
+ }
+ return $self;
+}
+
sub apply_to {
my ($self, $sqla) = @_;
$self = $self->new unless ref($self);
+ local $self->{sqla} = $sqla;
+ $self->register_extensions($sqla);
+}
+
+sub register_extensions {
+ my ($self, $sqla) = @_;
my @clauses = $sqla->clauses_of('select');
my @before_setop;
CLAUSE: foreach my $idx (0..$#clauses) {
}
}
die "Huh?" unless @before_setop;
- $sqla->clauses_of(select => 'with', @clauses);
- $sqla->clause_expanders(
- 'select.group_by', $self->cb(sub {
- $_[0]->expand_maybe_list_expr($_[2], -ident)
- }),
- 'select.having', $self->cb(sub { $_[0]->expand_expr($_[2]) }),
+ $sqla->clauses_of(select => @clauses);
+ $self->register(
+ clause_expanders => [
+ 'select.group_by'
+ => sub { $_[0]->expand_maybe_list_expr($_[2], -ident) },
+ 'select.having'
+ => sub { $_[0]->expand_expr($_[2]) },
+ ],
+ (map +(
+ "${_}er" => [
+ do {
+ my $x = $_;
+ (map +($_ => "_${x}_${_}"), qw(join from_list alias))
+ }
+ ]
+ ), qw(expand render)),
+ binop_expander => [ as => '_expand_op_as' ],
+ renderer => [ as => '_render_as' ],
+ expander => [ cast => '_expand_cast' ],
);
- foreach my $thing (qw(join from_list)) {
- $sqla->expander($thing => $self->cb("_expand_${thing}"))
- ->renderer($thing => $self->cb("_render_${thing}"))
- }
- $sqla->binop_expander(as => $self->cb('_expand_op_as'));
- $sqla->renderer(as => $self->cb('_render_as'));
- $sqla->expander(alias => $self->cb('_expand_alias'));
- $sqla->renderer(alias => $self->cb('_render_alias'));
$sqla->clauses_of(update => sub {
my ($self, @clauses) = @_;
@clauses;
});
- $sqla->clause_expanders(
- 'update.from' => $self->cb('_expand_from_list'),
- 'delete.using' => $self->cb('_expand_from_list'),
- 'insert.rowvalues' => $self->cb(sub {
- +(from => $_[0]->expand_expr({ -values => $_[2] }));
- }),
- 'insert.select' => $self->cb(sub {
- +(from => $_[0]->expand_expr({ -select => $_[2] }));
- }),
+ $self->register(
+ clause_expanders => [
+ 'update.from' => '_expand_from_list',
+ 'delete.using' => '_expand_from_list',
+ 'insert.rowvalues' => sub {
+ +(from => $_[0]->expand_expr({ -values => $_[2] }));
+ },
+ 'insert.select' => sub {
+ +(from => $_[0]->expand_expr({ -select => $_[2] }));
+ },
+ ],
);
# set ops
$self->cb('_expand_select', $_[0], \@before_setop);
});
- $sqla->clause_renderer(
- 'select.setop' => $self->cb(sub { $_[0]->render_aqt($_[2]); })
+ $self->register(
+ clause_renderer => [
+ 'select.setop' => sub { $_[0]->render_aqt($_[2]) }
+ ],
+ expander => [ map +($_ => '_expand_setop'), qw(union intersect except) ],
+ renderer => [ map +($_ => '_render_setop'), qw(union intersect except) ],
);
- foreach my $setop (qw(union intersect except)) {
- $sqla->expander($setop => $self->cb('_expand_setop'));
- $sqla->renderer($setop => $self->cb('_render_setop'));
- }
-
my $setop_expander = $self->cb('_expand_clause_setop');
$sqla->clause_expanders(
qw(union intersect except)
);
- my $w_exp = $self->cb('_expand_with');
- my $w_rdr = $self->cb('_render_with');
- $sqla->clause_expander('select.with' => $w_exp);
- $sqla->clause_expander('select.with_recursive' => $w_exp);
- $sqla->clause_renderer('select.with' => $w_rdr);
-
- foreach my $stmt (qw(insert update delete)) {
+ foreach my $stmt (qw(select insert update delete)) {
$sqla->clauses_of($stmt => 'with', $sqla->clauses_of($stmt));
- $sqla->clause_expander("${stmt}.$_" => $w_exp)
- for qw(with with_recursive);
- $sqla->clause_renderer("${stmt}.with" => $w_rdr);
+ $self->register(
+ clause_expanders => [
+ "${stmt}.with" => '_expand_with',
+ "${stmt}.with_recursive" => '_expand_with',
+ ],
+ clause_renderer => [ "${stmt}.with" => '_render_with' ],
+ );
}
- $sqla->expander(cast => $self->cb('_expand_cast'));
-
- $sqla->clause_expanders(
- "select.from", $self->cb('_expand_from_list'),
- "update.target", $self->cb('_expand_update_clause_target'),
- "update.update", $self->cb('_expand_update_clause_target'),
+ $self->register(
+ clause_expanders => [
+ "select.from", '_expand_from_list',
+ "update.target", '_expand_update_clause_target',
+ "update.update", '_expand_update_clause_target',
+ ]
);
return $sqla;
}
1;
+
+__END__
+
+=head1 NAME
+
+SQL::Abstract::ExtraClauses - new/experimental additions to L<SQL::Abstract>
+
+=head1 SYNOPSIS
+
+ my $sqla = SQL::Abstract->new;
+ SQL::Abstract::ExtraClauses->apply_to($sqla);
+
+=head1 METHODS
+
+=head2 apply_to
+
+Applies the plugin to an L<SQL::Abstract> object.
+
+=head2 cb
+
+For plugin authors, creates a callback to call a method on the plugin.
+
+=head2 sqla
+
+Available only during plugin callback executions, contains the currently
+active L<SQL::Abstract> object.
+
+=head1 NODE TYPES
+
+=head2 alias
+
+Represents a table alias. Expands name and column names with ident as default.
+
+ # expr
+ { -alias => [ 't', 'x', 'y', 'z' ] }
+
+ # aqt
+ { -alias => [
+ { -ident => [ 't' ] }, { -ident => [ 'x' ] },
+ { -ident => [ 'y' ] }, { -ident => [ 'z' ] },
+ ] }
+
+ # query
+ t(x, y, z)
+ []
+
+=head2 as
+
+Represents an sql AS. LHS is expanded with ident as default, RHS is treated
+as a list of arguments for the alias node.
+
+ # expr
+ { foo => { -as => 'bar' } }
+
+ # aqt
+ { -as =>
+ [
+ { -ident => [ 'foo' ] },
+ { -alias => [ { -ident => [ 'bar' ] } ] },
+ ]
+ }
+
+ # query
+ foo AS bar
+ []
+
+ # expr
+ { -as => [ { -select => { _ => 'blah' } }, 't', 'blah' ] }
+
+ # aqt
+ { -as => [
+ { -select =>
+ { select => { -op => [ ',', { -ident => [ 'blah' ] } ] } }
+ },
+ { -alias => [ { -ident => [ 't' ] }, { -ident => [ 'blah' ] } ] },
+ ] }
+
+ # query
+ (SELECT blah) AS t(blah)
+ []
+
+=head2 cast
+
+ # expr
+ { -cast => [ { -ident => 'birthday' }, 'date' ] }
+
+ # aqt
+ { -func => [
+ 'cast', {
+ -as => [ { -ident => [ 'birthday' ] }, { -ident => [ 'date' ] } ]
+ },
+ ] }
+
+ # query
+ CAST(birthday AS date)
+ []
+
+=cut
projects / scpubgit/Q-Branch.git / blobdiff