use strict;
use warnings;
use Scope::Guard ();
-use Context::Preserve ();
+use Context::Preserve 'preserve_context';
use Try::Tiny;
+use namespace::clean;
+
+__PACKAGE__->sql_limit_dialect ('RowNum');
=head1 NAME
__PACKAGE__->set_primary_key('id');
__PACKAGE__->sequence('mysequence');
+ # Somewhere in your Code
+ # add some data to a table with a hierarchical relationship
+ $schema->resultset('Person')->create ({
+ firstname => 'foo',
+ lastname => 'bar',
+ children => [
+ {
+ firstname => 'child1',
+ lastname => 'bar',
+ children => [
+ {
+ firstname => 'grandchild',
+ lastname => 'bar',
+ }
+ ],
+ },
+ {
+ firstname => 'child2',
+ lastname => 'bar',
+ },
+ ],
+ });
+
+ # select from the hierarchical relationship
+ my $rs = $schema->resultset('Person')->search({},
+ {
+ 'start_with' => { 'firstname' => 'foo', 'lastname' => 'bar' },
+ 'connect_by' => { 'parentid' => { '-prior' => { -ident => 'personid' } },
+ 'order_siblings_by' => { -asc => 'name' },
+ };
+ );
+
+ # this will select the whole tree starting from person "foo bar", creating
+ # following query:
+ # SELECT
+ # me.persionid me.firstname, me.lastname, me.parentid
+ # FROM
+ # person me
+ # START WITH
+ # firstname = 'foo' and lastname = 'bar'
+ # CONNECT BY
+ # parentid = prior personid
+ # ORDER SIBLINGS BY
+ # firstname ASC
+
=head1 DESCRIPTION
This class implements base Oracle support. The subclass
use base qw/DBIx::Class::Storage::DBI/;
use mro 'c3';
+__PACKAGE__->sql_maker_class('DBIx::Class::SQLMaker::Oracle');
+
sub deployment_statements {
my $self = shift;;
my ($schema, $type, $version, $dir, $sqltargs, @rest) = @_;
$sqltargs->{quote_table_names} = $quote_char ? 1 : 0;
$sqltargs->{quote_field_names} = $quote_char ? 1 : 0;
- my $oracle_version = try { $self->_get_dbh->get_info(18) };
-
- $sqltargs->{producer_args}{oracle_version} = $oracle_version;
+ if (
+ ! exists $sqltargs->{producer_args}{oracle_version}
+ and
+ my $dver = $self->_server_info->{dbms_version}
+ ) {
+ $sqltargs->{producer_args}{oracle_version} = $dver;
+ }
$self->next::method($schema, $type, $version, $dir, $sqltargs, @rest);
}
my ( $schema, $table ) = $source_name =~ /(\w+)\.(\w+)/;
my ($sql, @bind) = $sql_maker->select (
'ALL_TRIGGERS',
- ['trigger_body'],
+ [qw/ trigger_body table_owner trigger_name /],
{
$schema ? (owner => $schema) : (),
table_name => $table || $source_name,
- triggering_event => { -like => '%INSERT%' },
+ triggering_event => { -like => '%INSERT%' }, # this will also catch insert_or_update
+ trigger_type => { -like => '%BEFORE%' }, # we care only about 'before' triggers
status => 'ENABLED',
},
);
- my $sth = $dbh->prepare($sql);
- $sth->execute (@bind);
- while (my ($insert_trigger) = $sth->fetchrow_array) {
- return $1 if $insert_trigger =~ m!("?\w+"?)\.nextval!i; # col name goes here???
+ # to find all the triggers that mention the column in question a simple
+ # regex grep since the trigger_body above is a LONG and hence not searchable
+ my @triggers = ( map
+ { my %inf; @inf{qw/body schema name/} = @$_; \%inf }
+ ( grep
+ { $_->[0] =~ /\:new\.$col/i }
+ @{ $dbh->selectall_arrayref( $sql, {}, @bind ) }
+ )
+ );
+
+ # extract all sequence names mentioned in each trigger
+ for (@triggers) {
+ $_->{sequences} = [ $_->{body} =~ / ( "? [\.\w\"\-]+ "? ) \. nextval /xig ];
+ }
+
+ my $chosen_trigger;
+
+ # if only one trigger matched things are easy
+ if (@triggers == 1) {
+
+ if ( @{$triggers[0]{sequences}} == 1 ) {
+ $chosen_trigger = $triggers[0];
+ }
+ else {
+ $self->throw_exception( sprintf (
+ "Unable to introspect trigger '%s' for column %s.%s (references multiple sequences). "
+ . "You need to specify the correct 'sequence' explicitly in '%s's column_info.",
+ $triggers[0]{name},
+ $source_name,
+ $col,
+ $col,
+ ) );
+ }
}
- $self->throw_exception("Unable to find a sequence INSERT trigger on table '$source_name'.");
+ # got more than one matching trigger - see if we can narrow it down
+ elsif (@triggers > 1) {
+
+ my @candidates = grep
+ { $_->{body} =~ / into \s+ \:new\.$col /xi }
+ @triggers
+ ;
+
+ if (@candidates == 1 && @{$candidates[0]{sequences}} == 1) {
+ $chosen_trigger = $candidates[0];
+ }
+ else {
+ $self->throw_exception( sprintf (
+ "Unable to reliably select a BEFORE INSERT trigger for column %s.%s (possibilities: %s). "
+ . "You need to specify the correct 'sequence' explicitly in '%s's column_info.",
+ $source_name,
+ $col,
+ ( join ', ', map { "'$_->{name}'" } @triggers ),
+ $col,
+ ) );
+ }
+ }
+
+ if ($chosen_trigger) {
+ my $seq_name = $chosen_trigger->{sequences}[0];
+
+ $seq_name = "$chosen_trigger->{schema}.$seq_name"
+ unless $seq_name =~ /\./;
+
+ return $seq_name;
+ }
+
+ $self->throw_exception( sprintf (
+ "No suitable BEFORE INSERT triggers found for column %s.%s. "
+ . "You need to specify the correct 'sequence' explicitly in '%s's column_info.",
+ $source_name,
+ $col,
+ $col,
+ ));
}
sub _sequence_fetch {
my $self = shift;
my ($dbh, $op, $extra_bind, $ident, $bind_attributes, @args) = @_;
- my $retried;
+ my (@res, $tried);
+ my $wantarray = wantarray();
+ my $next = $self->next::can;
do {
try {
- return $self->next::method($dbh, $op, $extra_bind, $ident, $bind_attributes, @args);
+ my $exec = sub { $self->$next($dbh, $op, $extra_bind, $ident, $bind_attributes, @args) };
+
+ if (!defined $wantarray) {
+ $exec->();
+ }
+ elsif (! $wantarray) {
+ $res[0] = $exec->();
+ }
+ else {
+ @res = $exec->();
+ }
+
+ $tried++;
}
catch {
- if (!$retried and $_ =~ /ORA-01003/) {
+ if (! $tried and $_ =~ /ORA-01003/) {
# ORA-01003: no statement parsed (someone changed the table somehow,
# invalidating your cursor.)
my ($sql, $bind) = $self->_prep_for_execute($op, $extra_bind, $ident, \@args);
$self->throw_exception($_);
}
};
- } while (not $retried++);
+ } while (! $tried++);
+
+ return $wantarray ? @res : $res[0];
}
=head2 get_autoinc_seq
$self->dbh_do('_dbh_get_autoinc_seq', $source, $col);
}
-=head2 columns_info_for
-
-This wraps the superclass version of this method to force table
-names to uppercase
-
-=cut
-
-sub columns_info_for {
- my ($self, $table) = @_;
-
- $self->next::method($table);
-}
-
=head2 datetime_parser_type
This sets the proper DateTime::Format module for use with
my $alias = $self->next::method(@_);
- return $alias if length($alias) <= 30;
-
- # get a base64 md5 of the alias with join_count
- require Digest::MD5;
- my $ctx = Digest::MD5->new;
- $ctx->add($alias);
- my $md5 = $ctx->b64digest;
-
- # remove alignment mark just in case
- $md5 =~ s/=*\z//;
-
- # truncate and prepend to truncated relname without vowels
- (my $devoweled = $relname) =~ s/[aeiou]//g;
- my $shortened = substr($devoweled, 0, 18);
-
- my $new_alias =
- $shortened . '_' . substr($md5, 0, 30 - length($shortened) - 1);
-
- return $new_alias;
+ return $self->sql_maker->_shorten_identifier($alias, [$relname]);
}
=head2 with_deferred_fk_checks
my $txn_scope_guard = $self->txn_scope_guard;
$self->_do_query('alter session set constraints = deferred');
-
+
my $sg = Scope::Guard->new(sub {
$self->_do_query('alter session set constraints = immediate');
});
- return Context::Preserve::preserve_context(sub { $sub->() },
- after => sub { $txn_scope_guard->commit });
+ return
+ preserve_context { $sub->() } after => sub { $txn_scope_guard->commit };
}
+=head1 ATTRIBUTES
+
+Following additional attributes can be used in resultsets.
+
+=head2 connect_by or connect_by_nocycle
+
+=over 4
+
+=item Value: \%connect_by
+
+=back
+
+A hashref of conditions used to specify the relationship between parent rows
+and child rows of the hierarchy.
+
+
+ connect_by => { parentid => 'prior personid' }
+
+ # adds a connect by statement to the query:
+ # SELECT
+ # me.persionid me.firstname, me.lastname, me.parentid
+ # FROM
+ # person me
+ # CONNECT BY
+ # parentid = prior persionid
+
+
+ connect_by_nocycle => { parentid => 'prior personid' }
+
+ # adds a connect by statement to the query:
+ # SELECT
+ # me.persionid me.firstname, me.lastname, me.parentid
+ # FROM
+ # person me
+ # CONNECT BY NOCYCLE
+ # parentid = prior persionid
+
+
+=head2 start_with
+
+=over 4
+
+=item Value: \%condition
+
+=back
+
+A hashref of conditions which specify the root row(s) of the hierarchy.
+
+It uses the same syntax as L<DBIx::Class::ResultSet/search>
+
+ start_with => { firstname => 'Foo', lastname => 'Bar' }
+
+ # SELECT
+ # me.persionid me.firstname, me.lastname, me.parentid
+ # FROM
+ # person me
+ # START WITH
+ # firstname = 'foo' and lastname = 'bar'
+ # CONNECT BY
+ # parentid = prior persionid
+
+=head2 order_siblings_by
+
+=over 4
+
+=item Value: ($order_siblings_by | \@order_siblings_by)
+
+=back
+
+Which column(s) to order the siblings by.
+
+It uses the same syntax as L<DBIx::Class::ResultSet/order_by>
+
+ 'order_siblings_by' => 'firstname ASC'
+
+ # SELECT
+ # me.persionid me.firstname, me.lastname, me.parentid
+ # FROM
+ # person me
+ # CONNECT BY
+ # parentid = prior persionid
+ # ORDER SIBLINGS BY
+ # firstname ASC
+
=head1 AUTHOR
See L<DBIx::Class/CONTRIBUTORS>.
projects / dbsrgits/DBIx-Class.git / blobdiff