# data of individual to-be-row-objects. See t/resultset/rowparser_internals.t
# for extensive RV examples
sub _resolve_collapse {
- my ($self, $as, $as_fq_idx, $rel_chain, $parent_info, $node_idx_ref) = @_;
+ my ($self, $args, $common_args) = @_;
# for comprehensible error messages put ourselves at the head of the relationship chain
- $rel_chain ||= [ $self->source_name ];
+ $args->{_rel_chain} ||= [ $self->source_name ];
- # record top-level fully-qualified column index
- $as_fq_idx ||= { %$as };
+ # record top-level fully-qualified column index, start nodecount
+ $common_args ||= {
+ _as_fq_idx => { %{$args->{as}} },
+ _node_idx => 1, # this is *deliberately* not 0-based
+ };
my ($my_cols, $rel_cols);
- for (keys %$as) {
+ for (keys %{$args->{as}}) {
if ($_ =~ /^ ([^\.]+) \. (.+) /x) {
$rel_cols->{$1}{$2} = 1;
}
# throw everything assumed-from-parent away and replace with the collapser of
# the parent (whatever it may be)
my $assumed_from_parent;
- unless ($parent_info->{underdefined}) {
+ unless ($args->{_parent_info}{underdefined}) {
$assumed_from_parent->{columns} = { map
# only add to the list if we do not already select said columns
{ ! exists $my_cols->{$_} ? ( $_ => 1 ) : () }
- values %{$parent_info->{rel_condition} || {}}
+ values %{$args->{_parent_info}{rel_condition} || {}}
};
- $my_cols->{$_} = { via_collapse => $parent_info->{collapse_on} }
+ $my_cols->{$_} = { via_collapse => $args->{_parent_info}{collapse_on_idcols} }
for keys %{$assumed_from_parent->{columns}};
}
my $collapse_map;
- # try to resolve based on our columns (plus already inserted FK bridges)
+ # first try to reuse the parent's collapser (i.e. reuse collapser over 1:1)
+ # (makes for a leaner coderef later)
+ unless ($collapse_map->{-idcols_current_node}) {
+ $collapse_map->{-idcols_current_node} = $args->{_parent_info}{collapse_on_idcols}
+ if $args->{_parent_info}{collapser_reusable};
+ }
+
+
+ # Still dont know how to collapse - try to resolve based on our columns (plus already inserted FK bridges)
if (
+ ! $collapse_map->{-idcols_current_node}
+ and
$my_cols
and
my $idset = $self->_identifying_column_set ({map { $_ => $my_cols->{$_}{colinfo} } keys %$my_cols})
# and fix stuff up if this is the case
my @reduced_set = grep { ! $assumed_from_parent->{columns}{$_} } @$idset;
- $collapse_map->{-node_id} = __unique_numlist(
- (@reduced_set != @$idset) ? @{$parent_info->{collapse_on}} : (),
+ $collapse_map->{-idcols_current_node} = [ __unique_numlist(
+ @{ $args->{_parent_info}{collapse_on_idcols}||[] },
+
(map
{
my $fqc = join ('.',
- @{$rel_chain}[1 .. $#$rel_chain],
+ @{$args->{_rel_chain}}[1 .. $#{$args->{_rel_chain}}],
( $my_cols->{$_}{via_fk} || $_ ),
);
- $as_fq_idx->{$fqc};
+ $common_args->{_as_fq_idx}->{$fqc};
}
@reduced_set
),
- );
+ )];
}
# Stil don't know how to collapse - keep descending down 1:1 chains - if
# a related non-LEFT 1:1 is resolvable - its condition will collapse us
# too
- unless ($collapse_map->{-node_id}) {
+ unless ($collapse_map->{-idcols_current_node}) {
my @candidates;
for my $rel (keys %$relinfo) {
next unless ($relinfo->{$rel}{is_single} && $relinfo->{$rel}{is_inner});
- if ( my $rel_collapse = $relinfo->{$rel}{rsrc}->_resolve_collapse (
- $rel_cols->{$rel},
- $as_fq_idx,
- [ @$rel_chain, $rel ],
- { underdefined => 1 }
- )) {
- push @candidates, $rel_collapse->{-node_id};
+ if ( my $rel_collapse = $relinfo->{$rel}{rsrc}->_resolve_collapse ({
+ as => $rel_cols->{$rel},
+ _rel_chain => [ @{$args->{_rel_chain}}, $rel ],
+ _parent_info => { underdefined => 1 },
+ }, $common_args)) {
+ push @candidates, $rel_collapse->{-idcols_current_node};
}
}
# FIXME - maybe need to implement a data type order as well (i.e. prefer several ints
# to a single varchar)
if (@candidates) {
- ($collapse_map->{-node_id}) = sort { scalar @$a <=> scalar @$b } (@candidates);
+ ($collapse_map->{-idcols_current_node}) = sort { scalar @$a <=> scalar @$b } (@candidates);
}
}
- # Still dont know how to collapse - see if the parent passed us anything
- # (i.e. reuse collapser over 1:1)
- unless ($collapse_map->{-node_id}) {
- $collapse_map->{-node_id} = $parent_info->{collapse_on}
- if $parent_info->{collapser_reusable};
- }
-
# stop descending into children if we were called by a parent for first-pass
# and don't despair if nothing was found (there may be other parallel branches
# to dive into)
- if ($parent_info->{underdefined}) {
- return $collapse_map->{-node_id} ? $collapse_map : undef
+ if ($args->{_parent_info}{underdefined}) {
+ return $collapse_map->{-idcols_current_node} ? $collapse_map : undef
}
# nothing down the chain resolved - can't calculate a collapse-map
- elsif (! $collapse_map->{-node_id}) {
+ elsif (! $collapse_map->{-idcols_current_node}) {
$self->throw_exception ( sprintf
"Unable to calculate a definitive collapse column set for %s%s: fetch more unique non-nullable columns",
$self->source_name,
- @$rel_chain > 1
- ? sprintf (' (last member of the %s chain)', join ' -> ', @$rel_chain )
+ @{$args->{_rel_chain}} > 1
+ ? sprintf (' (last member of the %s chain)', join ' -> ', @{$args->{_rel_chain}} )
: ''
,
);
# If we got that far - we are collapsable - GREAT! Now go down all children
# a second time, and fill in the rest
- $collapse_map->{-is_optional} = 1 if $parent_info->{is_optional};
- $collapse_map->{-node_index} = ${ $node_idx_ref ||= \do { my $x = 1 } }++; # this is *deliberately* not 0-based
-
- my (@id_sets, $multis_in_chain);
- for my $rel (sort keys %$relinfo) {
-
- $collapse_map->{$rel} = $relinfo->{$rel}{rsrc}->_resolve_collapse (
- { map { $_ => 1 } ( keys %{$rel_cols->{$rel}} ) },
+ $collapse_map->{-is_optional} = 1 if $args->{_parent_info}{is_optional};
+ $collapse_map->{-node_index} = $common_args->{_node_idx}++;
- $as_fq_idx,
- [ @$rel_chain, $rel],
+ my @id_sets;
+ for my $rel (sort keys %$relinfo) {
- {
- collapse_on => [ @{$collapse_map->{-node_id}} ],
+ $collapse_map->{$rel} = $relinfo->{$rel}{rsrc}->_resolve_collapse ({
+ as => { map { $_ => 1 } ( keys %{$rel_cols->{$rel}} ) },
+ _rel_chain => [ @{$args->{_rel_chain}}, $rel],
+ _parent_info => {
+ # shallow copy
+ collapse_on_idcols => [ @{$collapse_map->{-idcols_current_node}} ],
rel_condition => $relinfo->{$rel}{fk_map},
# (regardless of left or not)
collapser_reusable => $relinfo->{$rel}{is_single},
},
-
- $node_idx_ref,
- );
+ }, $common_args );
$collapse_map->{$rel}{-is_single} = 1 if $relinfo->{$rel}{is_single};
$collapse_map->{$rel}{-is_optional} ||= 1 unless $relinfo->{$rel}{is_inner};
- push @id_sets, @{ $collapse_map->{$rel}{-branch_id} };
+ push @id_sets, ( map { @$_ } (
+ $collapse_map->{$rel}{-idcols_current_node},
+ $collapse_map->{$rel}{-idcols_extra_from_children} || (),
+ ));
}
- $collapse_map->{-branch_id} = __unique_numlist( @id_sets, @{$collapse_map->{-node_id}} );
+ if (@id_sets) {
+ my $cur_nodeid_hash = { map { $_ => 1 } @{$collapse_map->{-idcols_current_node}} };
+ $collapse_map->{-idcols_extra_from_children} = [ grep
+ { ! $cur_nodeid_hash->{$_} }
+ __unique_numlist( @id_sets )
+ ];
+ }
return $collapse_map;
}
# the collapsing parser is more complicated - it needs to keep a lot of state
#
else {
-
- my $collapse_map = $self->_resolve_collapse (
+ my $collapse_map = $self->_resolve_collapse ({
# FIXME
# only consider real columns (not functions) during collapse resolution
# this check shouldn't really be here, as fucktards are not supposed to
# FIXME !!!! - this does not yet deal with unbalanced selectors correctly
# (it is now trivial as the attrs specify where things go out of sync
# needs MOAR tests)
- { map
+ as => { map
{ ref $args->{selection}[$inflate_index->{$_}] ? () : ( $_ => $inflate_index->{$_} ) }
keys %$inflate_index
}
- );
+ });
- my $top_branch_idx_list = join (', ', @{$collapse_map->{-branch_id}});
+ my $all_idcols_as_list = join ', ', sort map { @$_ } (
+ $collapse_map->{-idcols_current_node},
+ $collapse_map->{-idcols_extra_from_children} || (),
+ );
my $top_node_id_path = join ('', map
{ "{'\xFF__IDVALPOS__${_}__\xFF'}" }
- @{$collapse_map->{-node_id}}
+ @{$collapse_map->{-idcols_current_node}}
);
my $rel_assemblers = __visit_infmap_collapse (
$inflate_index, $collapse_map
);
- $parser_src = sprintf (<<'EOS', $top_branch_idx_list, $top_node_id_path, $rel_assemblers);
-### BEGIN STRING EVAL
+ $parser_src = sprintf (<<'EOS', $all_idcols_as_list, $top_node_id_path, $rel_assemblers);
+### BEGIN LITERAL STRING EVAL
my ($rows_pos, $result_pos, $cur_row, @cur_row_ids, @collapse_idx, $is_new_res) = (0,0);
($_[1] and $_[1]->())
) {
+ # due to left joins some of the ids may be NULL/undef, and
+ # won't play well when used as hash lookups
$cur_row_ids[$_] = defined $cur_row->[$_] ? $cur_row->[$_] : "\xFF\xFFN\xFFU\xFFL\xFFL\xFF\xFF"
- for (%1$s); # the top branch_id includes all id values
+ for (%1$s);
$is_new_res = ! $collapse_idx[1]%2$s and (
$_[1] and $result_pos and (unshift @{$_[2]}, $cur_row) and last
}
splice @{$_[0]}, $result_pos; # truncate the passed in array for cases of collapsing ->all()
-### END STRING EVAL
+### END LITERAL STRING EVAL
EOS
# !!! note - different var than the one above
my $sequenced_node_id = join ('', map
{ "{'\xFF__IDVALPOS__${_}__\xFF'}" }
- @{$collapse_map->{-node_id}}
+ @{$collapse_map->{-idcols_current_node}}
);
my $me_struct = keys %$my_cols
# DISABLEPRUNE
#my $known_defined = { %{ $parent_info->{known_defined} || {} } };
- #$known_defined->{$_}++ for @{$collapse_map->{-node_id}};
+ #$known_defined->{$_}++ for @{$collapse_map->{-idcols_current_node}};
for my $rel (sort keys %$rel_cols) {
- push @src, sprintf( '%s[1]{%s} ||= [];', $node_idx_ref, perlstring($rel) )
- unless $collapse_map->{$rel}{-is_single};
+# push @src, sprintf(
+# '%s[1]{%s} ||= [];', $node_idx_ref, perlstring($rel)
+# ) unless $collapse_map->{$rel}{-is_single};
push @src, __visit_infmap_collapse($rel_cols->{$rel}, $collapse_map->{$rel}, {
node_idx => $collapse_map->{-node_index},
# { "(! defined '\xFF__IDVALPOS__${_}__\xFF')" }
# sort { $a <=> $b } grep
# { ! $known_defined->{$_} }
- # @{$collapse_map->{$rel}{-node_id}}
+ # @{$collapse_map->{$rel}{-idcols_current_node}}
#) {
# $src[-1] = sprintf( '(%s) or %s',
# join (' || ', @null_checks ),
# adding a dep on MoreUtils *just* for this is retarded
sub __unique_numlist {
- [ sort { $a <=> $b } keys %{ {map { $_ => 1 } @_ }} ]
+ sort { $a <=> $b } keys %{ {map { $_ => 1 } @_ }}
}
# This error must be thrown from two distinct codepaths, joining them is
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