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
use base 'DBIx::Class::Core';
__PACKAGE__->add_columns({ id => { sequence => 'mysequence', auto_nextval => 1 } });
__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
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 ||= {};
- my $quote_char = $self->schema->storage->{'_sql_maker_opts'}->{'quote_char'};
- $sqltargs->{quote_table_names} = 0 unless $quote_char;
- $sqltargs->{quote_field_names} = 0 unless $quote_char;
-
- my $oracle_version = eval { $self->_get_dbh->get_info(18) };
-
- $sqltargs->{producer_args}{oracle_version} = $oracle_version;
+ my $quote_char = $self->schema->storage->sql_maker->quote_char;
+ $sqltargs->{quote_table_names} = $quote_char ? 1 : 0;
+ $sqltargs->{quote_field_names} = $quote_char ? 1 : 0;
+
+ 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 @ids = ();
foreach my $col (@columns) {
my $seq = ($source->column_info($col)->{sequence} ||= $self->get_autoinc_seq($source,$col));
- my $id = $self->_sequence_fetch( 'currval', $seq );
+ my $id = $self->_sequence_fetch( 'CURRVAL', $seq );
push @ids, $id;
}
return @ids;
sub _dbh_get_autoinc_seq {
my ($self, $dbh, $source, $col) = @_;
- # look up the correct sequence automatically
- my $sql = q{
- SELECT trigger_body FROM ALL_TRIGGERS t
- WHERE t.table_name = ?
- AND t.triggering_event = 'INSERT'
- AND t.status = 'ENABLED'
- };
-
- # trigger_body is a LONG
- local $dbh->{LongReadLen} = 64 * 1024 if ($dbh->{LongReadLen} < 64 * 1024);
-
- my $sth;
+ my $sql_maker = $self->sql_maker;
+ my ($ql, $qr) = map { $_ ? (quotemeta $_) : '' } $sql_maker->_quote_chars;
my $source_name;
- if ( ref $source->name ne 'SCALAR' ) {
- $source_name = $source->name;
+ if ( ref $source->name eq 'SCALAR' ) {
+ $source_name = ${$source->name};
+
+ # the ALL_TRIGGERS match further on is case sensitive - thus uppercase
+ # stuff unless it is already quoted
+ $source_name = uc ($source_name) if $source_name !~ /\"/;
}
else {
- $source_name = ${$source->name};
+ $source_name = $source->name;
+ $source_name = uc($source_name) unless $ql;
}
- unless ($self->schema->storage->{'_sql_maker_opts'}->{'quote_char'}) {
- $source_name = uc($source_name);
+ # trigger_body is a LONG
+ local $dbh->{LongReadLen} = 64 * 1024 if ($dbh->{LongReadLen} < 64 * 1024);
+
+ # disable default bindtype
+ local $sql_maker->{bindtype} = 'normal';
+
+
+ # look up the correct sequence automatically
+ my ( $schema, $table ) = $source_name =~ /( (?:${ql})? \w+ (?:${qr})? ) \. ( (?:${ql})? \w+ (?:${qr})? )/x;
+ my ($sql, @bind) = $sql_maker->select (
+ 'ALL_TRIGGERS',
+ [qw/TRIGGER_BODY TABLE_OWNER TRIGGER_NAME/],
+ {
+ $schema ? (OWNER => $schema) : (),
+ TABLE_NAME => $table || $source_name,
+ TRIGGERING_EVENT => { -like => '%INSERT%' }, # this will also catch insert_or_update
+ TRIGGER_TYPE => { -like => '%BEFORE%' }, # we care only about 'before' triggers
+ STATUS => 'ENABLED',
+ },
+ );
+
+ # to find all the triggers that mention the column in question a simple
+ # regex grep since the trigger_body above is a LONG and hence not searchable
+ my @triggers = ( map
+ { my %inf; @inf{qw/body schema name/} = @$_; \%inf }
+ ( grep
+ { $_->[0] =~ /\:new\.${ql}${col}${qr} | \:new\.$col/xi }
+ @{ $dbh->selectall_arrayref( $sql, {}, @bind ) }
+ )
+ );
+
+ # extract all sequence names mentioned in each trigger
+ for (@triggers) {
+ $_->{sequences} = [ $_->{body} =~ / ( "? [\.\w\"\-]+ "? ) \. nextval /xig ];
}
- # check for fully-qualified name (eg. SCHEMA.TABLENAME)
- if ( my ( $schema, $table ) = $source_name =~ /(\w+)\.(\w+)/ ) {
- $sql = q{
- SELECT trigger_body FROM ALL_TRIGGERS t
- WHERE t.owner = ? AND t.table_name = ?
- AND t.triggering_event = 'INSERT'
- AND t.status = 'ENABLED'
- };
- $sth = $dbh->prepare($sql);
- my $table_name = $self -> sql_maker -> _quote($table);
- my $schema_name = $self -> sql_maker -> _quote($schema);
+ my $chosen_trigger;
- $sth->execute( $schema_name, $table_name );
+ # if only one trigger matched things are easy
+ if (@triggers == 1) {
+
+ if ( @{$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,
+ ) );
+ }
}
- else {
- $sth = $dbh->prepare($sql);
- $sth->execute( $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 ),
+ $col,
+ ) );
+ }
}
- while (my ($insert_trigger) = $sth->fetchrow_array) {
- return $1 if $insert_trigger =~ m!("?\w+"?)\.nextval!i; # col name goes here???
+
+ if ($chosen_trigger) {
+ my $seq_name = $chosen_trigger->{sequences}[0];
+
+ $seq_name = "$chosen_trigger->{schema}.$seq_name"
+ unless $seq_name =~ /\./;
+
+ return \$seq_name if $seq_name =~ /\"/; # may already be quoted in-trigger
+ return $seq_name;
}
- $self->throw_exception("Unable to find a sequence INSERT trigger on table '" . $source->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, $type, $seq ) = @_;
- my ($id) = $self->_get_dbh->selectrow_array("SELECT ${seq}.${type} FROM DUAL");
+
+ # use the maker to leverage quoting settings
+ my $sql_maker = $self->sql_maker;
+ my ($id) = $self->_get_dbh->selectrow_array ($sql_maker->select('DUAL', [ ref $seq ? \"$$seq.$type" : "$seq.$type" ] ) );
return $id;
}
my $dbh = $self->_dbh or return 0;
local $dbh->{RaiseError} = 1;
+ local $dbh->{PrintError} = 0;
- eval {
- $dbh->do("select 1 from dual");
+ return try {
+ $dbh->do('select 1 from dual');
+ 1;
+ } catch {
+ 0;
};
-
- return $@ ? 0 : 1;
}
sub _dbh_execute {
my $self = shift;
my ($dbh, $op, $extra_bind, $ident, $bind_attributes, @args) = @_;
- my $wantarray = wantarray;
-
- my (@res, $exception, $retried);
-
- RETRY: {
- do {
- eval {
- if ($wantarray) {
- @res = $self->next::method(@_);
- } else {
- $res[0] = $self->next::method(@_);
- }
- };
- $exception = $@;
- if ($exception =~ /ORA-01003/) {
+ my (@res, $tried);
+ my $wantarray = wantarray();
+ my $next = $self->next::can;
+ do {
+ try {
+ 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 (! $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);
delete $dbh->{CachedKids}{$sql};
- } else {
- last RETRY;
}
- } while (not $retried++);
- }
-
- $self->throw_exception($exception) if $exception;
+ else {
+ $self->throw_exception($_);
+ }
+ };
+ } while (! $tried++);
- wantarray ? @res : $res[0]
+ 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
on_connect_call => 'datetime_setup'
-In L<DBIx::Class::Storage::DBI/connect_info> to set the session nls date, and
-timestamp values for use with L<DBIx::Class::InflateColumn::DateTime> and the
-necessary environment variables for L<DateTime::Format::Oracle>, which is used
-by it.
+In L<connect_info|DBIx::Class::Storage::DBI/connect_info> to set the session nls
+date, and timestamp values for use with L<DBIx::Class::InflateColumn::DateTime>
+and the necessary environment variables for L<DateTime::Format::Oracle>, which
+is used by it.
Maximum allowable precision is used, unless the environment variables have
already been set.
my %bind_attributes;
foreach my $column ($source->columns) {
- my $data_type = $source->column_info($column)->{data_type} || '';
- next unless $data_type;
+ my $data_type = $source->column_info($column)->{data_type}
+ or next;
my %column_bind_attrs = $self->bind_attribute_by_data_type($data_type);
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