[Bast-commits] r6430 - in DBIx-Class/0.08/trunk: . lib/DBIx/Class
lib/DBIx/Class/Storage t
ribasushi at dev.catalyst.perl.org
ribasushi at dev.catalyst.perl.org
Tue May 26 14:29:55 GMT 2009
Author: ribasushi
Date: 2009-05-26 14:29:55 +0000 (Tue, 26 May 2009)
New Revision: 6430
Modified:
DBIx-Class/0.08/trunk/
DBIx-Class/0.08/trunk/lib/DBIx/Class/ResultSet.pm
DBIx-Class/0.08/trunk/lib/DBIx/Class/SQLAHacks.pm
DBIx-Class/0.08/trunk/lib/DBIx/Class/Storage/DBI.pm
DBIx-Class/0.08/trunk/t/42toplimit.t
Log:
r6415 at Thesaurus (orig r6414): ribasushi | 2009-05-25 11:18:05 +0200
Yet another branch to attempt a top fix
r6416 at Thesaurus (orig r6415): ribasushi | 2009-05-25 11:24:32 +0200
The Top limit emulation bundled with SQLA::Limit assumes that the limited resultset will be _always_ sorted. In order to fix this, I reimplemented _Top in SQLAHacks with a slight modification. Now the original order_by is passed to the outside of the nested select block, while order_up/down are calculated either based on the original order_by, or if one is not present an order by all PKs is attempted.
Since I do not have access to $rsrc in SQLA, I pass the list of PKs as an extra group_by hash entry. This appears to be rather safe, and besides we already pollute order_by with group_by and having (which seems to work rather well).
The only thing I am unsure about is the need for _gen_virtual_order(). Initially I was going to generate the pk list, only if we use the Top limit. Then it turned out there is no limit dialect before we connect, so I commented it out. Now all it does is check for a limit condition and returns the PK list. Is this necessary at all?
r6417 at Thesaurus (orig r6416): ribasushi | 2009-05-25 16:08:40 +0200
Shoot another Top problem, move test from top_limit_tweaks branch and delete
r6420 at Thesaurus (orig r6419): ribasushi | 2009-05-25 17:45:33 +0200
Too much logic for no benefit - always populate _virtual_order_by
Property changes on: DBIx-Class/0.08/trunk
___________________________________________________________________
Name: svk:merge
- 168d5346-440b-0410-b799-f706be625ff1:/DBIx-Class-current:2207
462d4d0c-b505-0410-bf8e-ce8f877b3390:/local/bast/DBIx-Class:3159
4d5fae46-8e6a-4e08-abee-817e9fb894a2:/local/bast/DBIx-Class/0.08/branches/resultsetcolumn_custom_columns:5160
4d5fae46-8e6a-4e08-abee-817e9fb894a2:/local/bast/DBIx-Class/0.08/branches/sqla_1.50_compat:5414
4d5fae46-8e6a-4e08-abee-817e9fb894a2:/local/bast/DBIx-Class/0.08/trunk:5969
9c88509d-e914-0410-b01c-b9530614cbfe:/local/DBIx-Class:32260
9c88509d-e914-0410-b01c-b9530614cbfe:/local/DBIx-Class-CDBICompat:54993
9c88509d-e914-0410-b01c-b9530614cbfe:/vendor/DBIx-Class:31122
ab17426e-7cd3-4704-a2a2-80b7c0a611bb:/local/dbic_column_attr:10946
ab17426e-7cd3-4704-a2a2-80b7c0a611bb:/local/dbic_trunk:11142
bd5ac9a7-f185-4d95-9186-dbb8b392a572:/local/os/bast/DBIx-Class/0.08/trunk:2798
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/DBIx-Class/0.08/branches/belongs_to_null_col_fix:5244
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/DBIx-Class/0.08/branches/cdbicompat_integration:4160
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/DBIx-Class/0.08/branches/column_attr:5074
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/DBIx-Class/0.08/branches/complex_join_rels:4589
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bd8105ee-0ff8-0310-8827-fb3f25b6796d:/DBIx-Class/0.08/branches/file_column:3920
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/DBIx-Class/0.08/branches/fix-update-and-delete-as_query:6162
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/DBIx-Class/0.08/branches/joined_count:6323
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/DBIx-Class/0.08/branches/multi_stuff:5565
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/DBIx-Class/0.08/branches/on_disconnect_do:3694
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bd8105ee-0ff8-0310-8827-fb3f25b6796d:/DBIx-Class/0.08/branches/parser_fk_index:4485
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/DBIx-Class/0.08/branches/prefetch:5699
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/DBIx-Class/0.08/branches/replication_dedux:4600
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/DBIx-Class/0.08/branches/rt_bug_41083:5437
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/DBIx-Class/0.08/branches/savepoints:4223
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/DBIx-Class/0.08/branches/sqla_1.50_compat:5321
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/DBIx-Class/0.08/branches/storage-ms-access:4142
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/DBIx-Class/0.08/branches/storage-tweaks:6262
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/DBIx-Class/0.08/branches/subclassed_rsset:5930
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/DBIx-Class/0.08/branches/subquery:5617
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bd8105ee-0ff8-0310-8827-fb3f25b6796d:/DBIx-Class/0.08/branches/sybase_mssql:6125
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/DBIx-Class/0.08/branches/versioned_enhancements:4125
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/DBIx-Class/0.08/branches/versioning:4578
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/DBIx-Class/0.08/branches/views:5585
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/branches/DBIx-Class-C3:318
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/branches/DBIx-Class-current:2222
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/branches/DBIx-Class-joins:173
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/branches/DBIx-Class-resultset:570
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/branches/DBIx-Class/datetime:1716
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/branches/DBIx-Class/find_compat:1855
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/branches/DBIx-Class/find_unique_query_fixes:2142
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/branches/DBIx-Class/inflate:1988
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/branches/DBIx-Class/many_to_many:2025
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/branches/DBIx-Class/re_refactor_bugfix:1944
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/branches/DBIx-Class/reorganize_tests:1827
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/branches/DBIx-Class/resultset-new-refactor:1766
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/branches/DBIx-Class/resultset_2_electric_boogaloo:2175
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/branches/DBIx-Class/resultset_cleanup:2102
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/branches/DBIx-Class/sqlt_tests_refactor:2043
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/trunk/DBIx-Class:3606
fe160bb6-dc1c-0410-9f2b-d64a711b54a5:/local/DBIC-trunk-0.08:10510
+ 168d5346-440b-0410-b799-f706be625ff1:/DBIx-Class-current:2207
462d4d0c-b505-0410-bf8e-ce8f877b3390:/local/bast/DBIx-Class:3159
4d5fae46-8e6a-4e08-abee-817e9fb894a2:/local/bast/DBIx-Class/0.08/branches/resultsetcolumn_custom_columns:5160
4d5fae46-8e6a-4e08-abee-817e9fb894a2:/local/bast/DBIx-Class/0.08/branches/sqla_1.50_compat:5414
4d5fae46-8e6a-4e08-abee-817e9fb894a2:/local/bast/DBIx-Class/0.08/trunk:5969
9c88509d-e914-0410-b01c-b9530614cbfe:/local/DBIx-Class:32260
9c88509d-e914-0410-b01c-b9530614cbfe:/local/DBIx-Class-CDBICompat:54993
9c88509d-e914-0410-b01c-b9530614cbfe:/vendor/DBIx-Class:31122
ab17426e-7cd3-4704-a2a2-80b7c0a611bb:/local/dbic_column_attr:10946
ab17426e-7cd3-4704-a2a2-80b7c0a611bb:/local/dbic_trunk:11142
bd5ac9a7-f185-4d95-9186-dbb8b392a572:/local/os/bast/DBIx-Class/0.08/trunk:2798
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/DBIx-Class/0.08/branches/belongs_to_null_col_fix:5244
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/DBIx-Class/0.08/branches/cdbicompat_integration:4160
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/DBIx-Class/0.08/branches/column_attr:5074
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/DBIx-Class/0.08/branches/complex_join_rels:4589
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/DBIx-Class/0.08/branches/count_distinct:6218
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/DBIx-Class/0.08/branches/diamond_relationships:6310
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/DBIx-Class/0.08/branches/file_column:3920
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/DBIx-Class/0.08/branches/fix-update-and-delete-as_query:6162
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/DBIx-Class/0.08/branches/joined_count:6323
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/DBIx-Class/0.08/branches/multi_stuff:5565
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/DBIx-Class/0.08/branches/on_disconnect_do:3694
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/DBIx-Class/0.08/branches/oracle-tweaks:6222
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/DBIx-Class/0.08/branches/oracle_sequence:4173
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/DBIx-Class/0.08/branches/parser_fk_index:4485
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/DBIx-Class/0.08/branches/prefetch:5699
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/DBIx-Class/0.08/branches/replication_dedux:4600
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/DBIx-Class/0.08/branches/rt_bug_41083:5437
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/DBIx-Class/0.08/branches/savepoints:4223
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/DBIx-Class/0.08/branches/sqla_1.50_compat:5321
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/DBIx-Class/0.08/branches/storage-ms-access:4142
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/DBIx-Class/0.08/branches/storage-tweaks:6262
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/DBIx-Class/0.08/branches/subclassed_rsset:5930
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/DBIx-Class/0.08/branches/subquery:5617
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/DBIx-Class/0.08/branches/sybase:5651
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/DBIx-Class/0.08/branches/sybase_mssql:6125
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/DBIx-Class/0.08/branches/top_limit_altfix:6429
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/DBIx-Class/0.08/branches/versioned_enhancements:4125
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/DBIx-Class/0.08/branches/versioning:4578
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/DBIx-Class/0.08/branches/views:5585
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/branches/DBIx-Class-C3:318
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/branches/DBIx-Class-current:2222
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/branches/DBIx-Class-joins:173
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/branches/DBIx-Class-resultset:570
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/branches/DBIx-Class/datetime:1716
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/branches/DBIx-Class/find_compat:1855
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/branches/DBIx-Class/find_unique_query_fixes:2142
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/branches/DBIx-Class/inflate:1988
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/branches/DBIx-Class/many_to_many:2025
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bd8105ee-0ff8-0310-8827-fb3f25b6796d:/branches/DBIx-Class/reorganize_tests:1827
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/branches/DBIx-Class/resultset-new-refactor:1766
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/branches/DBIx-Class/resultset_2_electric_boogaloo:2175
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/branches/DBIx-Class/resultset_cleanup:2102
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/branches/DBIx-Class/sqlt_tests_refactor:2043
bd8105ee-0ff8-0310-8827-fb3f25b6796d:/trunk/DBIx-Class:3606
fe160bb6-dc1c-0410-9f2b-d64a711b54a5:/local/DBIC-trunk-0.08:10510
Modified: DBIx-Class/0.08/trunk/lib/DBIx/Class/ResultSet.pm
===================================================================
--- DBIx-Class/0.08/trunk/lib/DBIx/Class/ResultSet.pm 2009-05-26 14:29:28 UTC (rev 6429)
+++ DBIx-Class/0.08/trunk/lib/DBIx/Class/ResultSet.pm 2009-05-26 14:29:55 UTC (rev 6430)
@@ -661,6 +661,8 @@
my ($self) = @_;
my $attrs = $self->_resolved_attrs_copy;
+ $attrs->{_virtual_order_by} = $self->_gen_virtual_order;
+
return $self->{cursor}
||= $self->result_source->storage->select($attrs->{from}, $attrs->{select},
$attrs->{where},$attrs);
@@ -712,6 +714,8 @@
}
my $attrs = $self->_resolved_attrs_copy;
+ $attrs->{_virtual_order_by} = $self->_gen_virtual_order;
+
if ($where) {
if (defined $attrs->{where}) {
$attrs->{where} = {
@@ -738,6 +742,16 @@
return (@data ? ($self->_construct_object(@data))[0] : undef);
}
+# _gen_virtual_order
+#
+# This is a horrble hack, but seems like the best we can do at this point
+# Some limit emulations (Top) require an ordered resultset in order to
+# function at all. So supply a PK order to be used if necessary
+
+sub _gen_virtual_order {
+ return [ shift->result_source->primary_columns ];
+}
+
# _is_unique_query
#
# Try to determine if the specified query is guaranteed to be unique, based on
Modified: DBIx-Class/0.08/trunk/lib/DBIx/Class/SQLAHacks.pm
===================================================================
--- DBIx-Class/0.08/trunk/lib/DBIx/Class/SQLAHacks.pm 2009-05-26 14:29:28 UTC (rev 6429)
+++ DBIx-Class/0.08/trunk/lib/DBIx/Class/SQLAHacks.pm 2009-05-26 14:29:55 UTC (rev 6430)
@@ -67,11 +67,7 @@
return $self->SUPER::_where_field_BETWEEN ($lhs, $op, $rhs);
}
-
-
-# DB2 is the only remaining DB using this. Even though we are not sure if
-# RowNumberOver is still needed here (should be part of SQLA) leave the
-# code in place
+# Slow but ANSI standard Limit/Offset support. DB2 uses this
sub _RowNumberOver {
my ($self, $sql, $order, $rows, $offset ) = @_;
@@ -94,7 +90,45 @@
return $sql;
}
+# Crappy Top based Limit/Offset support. MSSQL uses this currently,
+# but may have to switch to RowNumberOver one day
+sub _Top {
+ my ( $self, $sql, $order, $rows, $offset ) = @_;
+ croak '$order supplied to SQLAHacks limit emulators must be a hash'
+ if (ref $order ne 'HASH');
+
+ $order = { %$order }; #copy
+
+ my $last = $rows + $offset;
+
+ my $req_order = $self->_order_by ($order->{order_by});
+ my $limit_order = $req_order ? $order->{order_by} : $order->{_virtual_order_by};
+
+ delete $order->{$_} for qw/order_by _virtual_order_by/;
+ my $grpby_having = $self->_order_by ($order);
+
+ my ( $order_by_inner, $order_by_outer ) = $self->_order_directions($limit_order);
+
+ $sql =~ s/^\s*(SELECT|select)//;
+
+ $sql = <<"SQL";
+ SELECT * FROM
+ (
+ SELECT TOP $rows * FROM
+ (
+ SELECT TOP $last $sql $grpby_having $order_by_inner
+ ) AS foo
+ $order_by_outer
+ ) AS bar
+ $req_order
+
+SQL
+ return $sql;
+}
+
+
+
# While we're at it, this should make LIMIT queries more efficient,
# without digging into things too deeply
sub _find_syntax {
@@ -213,32 +247,38 @@
my $ret = '';
my @extra;
if (ref $_[0] eq 'HASH') {
+
if (defined $_[0]->{group_by}) {
$ret = $self->_sqlcase(' group by ')
.$self->_recurse_fields($_[0]->{group_by}, { no_rownum_hack => 1 });
}
+
if (defined $_[0]->{having}) {
my $frag;
($frag, @extra) = $self->_recurse_where($_[0]->{having});
push(@{$self->{having_bind}}, @extra);
$ret .= $self->_sqlcase(' having ').$frag;
}
+
if (defined $_[0]->{order_by}) {
$ret .= $self->_order_by($_[0]->{order_by});
}
+
if (grep { $_ =~ /^-(desc|asc)/i } keys %{$_[0]}) {
return $self->SUPER::_order_by($_[0]);
}
+
} elsif (ref $_[0] eq 'SCALAR') {
$ret = $self->_sqlcase(' order by ').${ $_[0] };
} elsif (ref $_[0] eq 'ARRAY' && @{$_[0]}) {
- my @order = @{+shift};
- $ret = $self->_sqlcase(' order by ')
- .join(', ', map {
- my $r = $self->_order_by($_, @_);
- $r =~ s/^ ?ORDER BY //i;
- $r;
- } @order);
+ my @order = map {
+ my $r = $self->_order_by($_, @_);
+ $r =~ s/^ ?ORDER BY //i;
+ $r || ();
+ } @{+shift};
+
+ $ret = $self->_sqlcase(' order by ') . join(', ', @order) if @order;
+
} else {
$ret = $self->SUPER::_order_by(@_);
}
@@ -252,7 +292,6 @@
sub _resolve_order {
my ($self, $order) = @_;
- $order = $order->{order_by} if (ref $order eq 'HASH' and $order->{order_by});
if (ref $order eq 'HASH') {
$order = [$self->_resolve_order_hash($order)];
@@ -292,6 +331,7 @@
croak "$key is not a valid direction, use -asc or -desc";
}
}
+
return @new_order;
}
Modified: DBIx-Class/0.08/trunk/lib/DBIx/Class/Storage/DBI.pm
===================================================================
--- DBIx-Class/0.08/trunk/lib/DBIx/Class/Storage/DBI.pm 2009-05-26 14:29:28 UTC (rev 6429)
+++ DBIx-Class/0.08/trunk/lib/DBIx/Class/Storage/DBI.pm 2009-05-26 14:29:55 UTC (rev 6430)
@@ -11,6 +11,7 @@
use DBIx::Class::Storage::DBI::Cursor;
use DBIx::Class::Storage::Statistics;
use Scalar::Util qw/blessed weaken/;
+use List::Util();
__PACKAGE__->mk_group_accessors('simple' =>
qw/_connect_info _dbi_connect_info _dbh _sql_maker _sql_maker_opts
@@ -1177,11 +1178,14 @@
my $sql_maker = $self->sql_maker;
$sql_maker->{for} = $for;
- if (exists $attrs->{group_by} || $attrs->{having}) {
+ my @in_order_attrs = qw/group_by having _virtual_order_by/;
+ if (List::Util::first { exists $attrs->{$_} } (@in_order_attrs) ) {
$order = {
- group_by => $attrs->{group_by},
- having => $attrs->{having},
- ($order ? (order_by => $order) : ())
+ ($order
+ ? (order_by => $order)
+ : ()
+ ),
+ ( map { $_ => $attrs->{$_} } (@in_order_attrs) )
};
}
my $bind_attrs = {}; ## Future support
Modified: DBIx-Class/0.08/trunk/t/42toplimit.t
===================================================================
--- DBIx-Class/0.08/trunk/t/42toplimit.t 2009-05-26 14:29:28 UTC (rev 6429)
+++ DBIx-Class/0.08/trunk/t/42toplimit.t 2009-05-26 14:29:55 UTC (rev 6430)
@@ -9,6 +9,8 @@
my $schema = DBICTest->init_schema;
# Trick the sqlite DB to use Top limit emulation
+# We could test all of this via $sq->$op directly,
+# but some conditions needs a $rsrc
delete $schema->storage->_sql_maker->{_cached_syntax};
$schema->storage->_sql_maker->limit_dialect ('Top');
@@ -115,5 +117,22 @@
},
);
-plan (tests => scalar @tests);
+plan (tests => scalar @tests + 1);
+
test_order ($_) for @tests;
+
+is_same_sql_bind (
+ $rs->search ({}, { group_by => 'bar', order_by => 'bar' })->as_query,
+ '(
+ SELECT * FROM
+ (
+ SELECT TOP 1 * FROM
+ (
+ SELECT TOP 4 me.foo, me.bar, me.hello, me.goodbye, me.sensors, me.read_count FROM fourkeys me GROUP BY bar ORDER BY bar ASC
+ ) AS foo
+ ORDER BY bar DESC
+ ) AS bar
+ ORDER BY bar
+ )',
+ [],
+);
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