use List::Util 'first';
use Scalar::Util 'blessed';
use Sub::Name 'subname';
+use Data::Query::ExprHelpers;
use namespace::clean;
#
my $aliastypes = $self->_resolve_aliastypes_from_select_args(@_);
- # don't care
- delete $aliastypes->{joining};
+ my $orig_joins = delete $aliastypes->{joining};
+ my $orig_multiplying = $aliastypes->{multiplying};
# a grouped set will not be affected by amount of rows. Thus any
# {multiplying} joins can go
for my $j (@{$from}[1..$#$from]) {
push @newfrom, $j if (
- (! $j->[0]{-alias}) # legacy crap
+ (! defined $j->[0]{-alias}) # legacy crap
||
$need_joins{$j->[0]{-alias}}
);
}
- return \@newfrom;
+ return ( \@newfrom, {
+ multiplying => { map { $need_joins{$_} ? ($_ => $orig_multiplying->{$_}) : () } keys %$orig_multiplying },
+ %$aliastypes,
+ joining => { map { $_ => $orig_joins->{$_} } keys %need_joins },
+ } );
}
#
# generate inner/outer attribute lists, remove stuff that doesn't apply
my $outer_attrs = { %$attrs };
- delete $outer_attrs->{$_} for qw/where bind rows offset group_by _grouped_by_distinct having/;
+ delete @{$outer_attrs}{qw(where bind rows offset group_by _grouped_by_distinct having)};
my $inner_attrs = { %$attrs };
- delete $inner_attrs->{$_} for qw/from for collapse select as _related_results_construction/;
+ delete @{$inner_attrs}{qw(from for collapse select as _related_results_construction)};
# there is no point of ordering the insides if there is no limit
delete $inner_attrs->{order_by} if (
# We can not just fetch everything because a potential has_many restricting
# join collapse *will not work* on heavy data types.
my $connecting_aliastypes = $self->_resolve_aliastypes_from_select_args(
- [grep { ref($_) eq 'ARRAY' or ref($_) eq 'HASH' } @{$from}[$root_node_offset .. $#$from]],
+ $from,
[],
$where,
$inner_attrs
local $self->{_use_join_optimizer} = 1;
# throw away multijoins since we def. do not care about those inside the subquery
- my $inner_from = $self->_prune_unused_joins ($from, $inner_select, $where, {
+ my ($inner_from, $inner_aliastypes) = $self->_prune_unused_joins ($from, $inner_select, $where, {
%$inner_attrs, _force_prune_multiplying_joins => 1
});
- my $inner_aliastypes =
- $self->_resolve_aliastypes_from_select_args( $inner_from, $inner_select, $where, $inner_attrs );
-
# uh-oh a multiplier (which is not us) left in, this is a problem
if (
$inner_aliastypes->{multiplying}
and
- !$inner_aliastypes->{grouping} # if there are groups - assume user knows wtf they are up to
+ # if there are user-supplied groups - assume user knows wtf they are up to
+ ( ! $inner_aliastypes->{grouping} or $inner_attrs->{_grouped_by_distinct} )
and
my @multipliers = grep { $_ ne $root_alias } keys %{$inner_aliastypes->{multiplying}}
) {
# if none of the multipliers came from an order_by (guaranteed to have been combined
- # with a limit) - easy - just slap a group_by to simulate a collape and be on our way
+ # with a limit) - easy - just slap a group_by to simulate a collapse and be on our way
if (
! $inner_aliastypes->{ordering}
or
) {
my $unprocessed_order_chunks;
- ($inner_attrs->{group_by}, $unprocessed_order_chunks) = $self->_group_over_selection (
- $inner_from, $inner_select, $inner_attrs->{order_by}
- );
+ ($inner_attrs->{group_by}, $unprocessed_order_chunks) = $self->_group_over_selection ({
+ %$inner_attrs,
+ from => $inner_from,
+ select => $inner_select,
+ });
$self->throw_exception (
'A required group_by clause could not be constructed automatically due to a complex '
# for DESC, and group_by the root columns. The end result should be
# exactly what we expect
- # FIXME REMOVE LATER - (just a sanity check)
- if (defined ( my $impostor = first
- { $_ ne $root_alias }
- keys %{ $inner_aliastypes->{selecting} }
- ) ) {
- $self->throw_exception(sprintf
- 'Unexpected inner selection during complex prefetch (%s)...',
- join ', ', keys %{ $inner_aliastypes->{joining}{$impostor}{-seen_columns} || {} }
- );
- }
-
# supplement the main selection with pks if not already there,
- # as they will have to be a part of the group_by to colapse
+ # as they will have to be a part of the group_by to collapse
# things properly
my $cur_sel = { map { $_ => 1 } @$inner_select };
# do not care about leftovers here - it will be all the functions
# we just created
- ($inner_attrs->{group_by}) = $self->_group_over_selection (
- $inner_from, $inner_select, $inner_attrs->{order_by}
- );
+ ($inner_attrs->{group_by}) = $self->_group_over_selection ({
+ %$inner_attrs,
+ from => $inner_from,
+ select => $inner_select,
+ });
}
}
# we may not be the head
if ($root_node_offset) {
- # first generate the outer_from, up to the substitution point
+ # first generate the outer_from, up and including the substitution point
@outer_from = splice @$from, 0, $root_node_offset;
push @outer_from, [
};
}
- shift @$from; # it's replaced in @outer_from already
+ shift @$from; # what we just replaced above
# scan the *remaining* from spec against different attributes, and see which joins are needed
# in what role
- my $outer_aliastypes =
+ my $outer_aliastypes = $outer_attrs->{_aliastypes} =
$self->_resolve_aliastypes_from_select_args( $from, $outer_select, $where, $outer_attrs );
# unroll parents
if ( $need_outer_group_by and $attrs->{_grouped_by_distinct} ) {
my $unprocessed_order_chunks;
- ($outer_attrs->{group_by}, $unprocessed_order_chunks) = $self->_group_over_selection (
- \@outer_from, $outer_select, $outer_attrs->{order_by}
- );
+ ($outer_attrs->{group_by}, $unprocessed_order_chunks) = $self->_group_over_selection ({
+ %$outer_attrs,
+ from => \@outer_from,
+ select => $outer_select,
+ });
$self->throw_exception (
'A required group_by clause could not be constructed automatically due to a complex '
# Unfortunately not much can be done until SQLA2 introspection arrives, and even
# then if where conditions apply to the *right* side of the prefetch, you may have
# to both filter the inner select (e.g. to apply a limit) and then have to re-filter
- # the outer select to exclude joins you didin't want in the first place
+ # the outer select to exclude joins you didn't want in the first place
#
# OTOH it can be seen as a plus: <ash> (notes that this query would make a DBA cry ;)
return (\@outer_from, $outer_select, $where, $outer_attrs);
#
# Due to a lack of SQLA2 we fall back to crude scans of all the
# select/where/order/group attributes, in order to determine what
-# aliases are neded to fulfill the query. This information is used
+# aliases are needed to fulfill the query. This information is used
# throughout the code to prune unnecessary JOINs from the queries
# in an attempt to reduce the execution time.
# Although the method is pretty horrific, the worst thing that can
# generate sql chunks
my $to_scan = {
restricting => [
- $sql_maker->_recurse_where ($where),
- $sql_maker->_parse_rs_attrs ({ having => $attrs->{having} }),
+ ($where
+ ? ($sql_maker->_recurse_where($where))[0]
+ : ()
+ ),
+ ($attrs->{having}
+ ? ($sql_maker->_recurse_where($attrs->{having}))[0]
+ : ()
+ ),
],
grouping => [
- $sql_maker->_parse_rs_attrs ({ group_by => $attrs->{group_by} }),
+ ($attrs->{group_by}
+ ? ($sql_maker->_render_sqla(group_by => $attrs->{group_by}))[0]
+ : (),
+ )
],
joining => [
$sql_maker->_recurse_from (
),
],
selecting => [
- $sql_maker->_recurse_fields ($select),
+ scalar $sql_maker->_render_sqla(select_select => $select),
],
ordering => [
map { $_->[0] } $self->_extract_order_criteria ($attrs->{order_by}, $sql_maker),
],
};
+ # local is not enough - need to ensure the inner objects get rebuilt
+ # with the original quoting setup (or lack thereof)
+ $sql_maker->clear_renderer;
+ $sql_maker->clear_converter;
+
# throw away empty chunks
$_ = [ map { $_ || () } @$_ ] for values %$to_scan;
# This is the engine behind { distinct => 1 }
sub _group_over_selection {
- my ($self, $from, $select, $order_by) = @_;
+ my ($self, $attrs) = @_;
- my $rs_column_list = $self->_resolve_column_info ($from);
+ my $colinfos = $self->_resolve_column_info ($attrs->{from});
my (@group_by, %group_index);
# the logic is: if it is a { func => val } we assume an aggregate,
# otherwise if \'...' or \[...] we assume the user knows what is
# going on thus group over it
- for (@$select) {
+ for (@{$attrs->{select}}) {
if (! ref($_) or ref ($_) ne 'HASH' ) {
push @group_by, $_;
$group_index{$_}++;
- if ($rs_column_list->{$_} and $_ !~ /\./ ) {
+ if ($colinfos->{$_} and $_ !~ /\./ ) {
# add a fully qualified version as well
- $group_index{"$rs_column_list->{$_}{-source_alias}.$_"}++;
+ $group_index{"$colinfos->{$_}{-source_alias}.$_"}++;
}
}
}
- # add any order_by parts that are not already present in the group_by
+ # add any order_by parts *from the main source* that are not already
+ # present in the group_by
# we need to be careful not to add any named functions/aggregates
# i.e. order_by => [ ... { count => 'foo' } ... ]
my @leftovers;
- for ($self->_extract_order_criteria($order_by)) {
+ for ($self->_extract_order_criteria($attrs->{order_by})) {
# only consider real columns (for functions the user got to do an explicit group_by)
if (@$_ != 1) {
push @leftovers, $_;
next;
}
my $chunk = $_->[0];
- my $colinfo = $rs_column_list->{$chunk} or do {
+
+ if (
+ !$colinfos->{$chunk}
+ or
+ $colinfos->{$chunk}{-source_alias} ne $attrs->{alias}
+ ) {
push @leftovers, $_;
next;
- };
+ }
- $chunk = "$colinfo->{-source_alias}.$chunk" if $chunk !~ /\./;
+ $chunk = $colinfos->{$chunk}{-fq_colname};
push @group_by, $chunk unless $group_index{$chunk}++;
}
my ($self, $ident) = @_;
my $alias2source = {};
- my $rs_alias;
# the reason this is so contrived is that $ident may be a {from}
# structure, specifying multiple tables to join
if ( blessed $ident && $ident->isa("DBIx::Class::ResultSource") ) {
# this is compat mode for insert/update/delete which do not deal with aliases
$alias2source->{me} = $ident;
- $rs_alias = 'me';
}
elsif (ref $ident eq 'ARRAY') {
my $tabinfo;
if (ref $_ eq 'HASH') {
$tabinfo = $_;
- $rs_alias = $tabinfo->{-alias};
}
if (ref $_ eq 'ARRAY' and ref $_->[0] eq 'HASH') {
$tabinfo = $_->[0];
}
}
- return ($alias2source, $rs_alias);
+ return $alias2source;
}
# Takes $ident, \@column_names
# for all sources
sub _resolve_column_info {
my ($self, $ident, $colnames) = @_;
- my ($alias2src, $root_alias) = $self->_resolve_ident_sources($ident);
+ my $alias2src = $self->_resolve_ident_sources($ident);
my (%seen_cols, @auto_colnames);
sub _extract_order_criteria {
my ($self, $order_by, $sql_maker) = @_;
+ $sql_maker ||= $self->sql_maker;
+
+ my $order_dq = $sql_maker->converter->_order_by_to_dq($order_by);
+
+ my @by;
+ while (is_Literal($order_dq)) {
+ push @by, $order_dq->{by};
+ $order_dq = $order_dq->{from};
+ }
+
+ return map { [ $sql_maker->_render_dq($_) ] } @by;
+
my $parser = sub {
my ($sql_maker, $order_by, $orig_quote_chars) = @_;
die 'How did we get here...';
}
-# returns an arrayref of column names which *definitely* have som
+# returns an arrayref of column names which *definitely* have some
# sort of non-nullable equality requested in the given condition
# specification. This is used to figure out if a resultset is
# constrained to a column which is part of a unique constraint,
projects / dbsrgits/DBIx-Class.git / blobdiff