X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FDBIx%2FClass%2FStorage%2FDBI%2FOracle%2FGeneric.pm;h=448c203fde1a4e06b07f017544f45c8e095f1a18;hb=b7b18f328d214290d4ae84dd94125d72db88db38;hp=2e999f4712244303056dc06d3112c37b963e8e8b;hpb=ef131d82b1a6cad5ef079a341912b0c6d8b7b990;p=dbsrgits%2FDBIx-Class.git diff --git a/lib/DBIx/Class/Storage/DBI/Oracle/Generic.pm b/lib/DBIx/Class/Storage/DBI/Oracle/Generic.pm index 2e999f4..448c203 100644 --- a/lib/DBIx/Class/Storage/DBI/Oracle/Generic.pm +++ b/lib/DBIx/Class/Storage/DBI/Oracle/Generic.pm @@ -2,22 +2,26 @@ package DBIx::Class::Storage::DBI::Oracle::Generic; use strict; use warnings; +use Scope::Guard (); +use Context::Preserve (); =head1 NAME -DBIx::Class::Storage::DBI::Oracle::Generic - Automatic primary key class for Oracle +DBIx::Class::Storage::DBI::Oracle::Generic - Oracle Support for DBIx::Class =head1 SYNOPSIS - # In your table classes - __PACKAGE__->load_components(qw/PK::Auto Core/); + # In your result (table) classes + use base 'DBIx::Class::Core'; __PACKAGE__->add_columns({ id => { sequence => 'mysequence', auto_nextval => 1 } }); __PACKAGE__->set_primary_key('id'); __PACKAGE__->sequence('mysequence'); =head1 DESCRIPTION -This class implements autoincrements for Oracle. +This class implements base Oracle support. The subclass +L is for C<(+)> joins in Oracle +versions before 9. =head1 METHODS @@ -26,9 +30,6 @@ This class implements autoincrements for Oracle. use base qw/DBIx::Class::Storage::DBI/; use mro 'c3'; -# For ORA_BLOB => 113, ORA_CLOB => 112 -use DBD::Oracle qw( :ora_types ); - sub _dbh_last_insert_id { my ($self, $dbh, $source, @columns) = @_; my @ids = (); @@ -52,12 +53,20 @@ sub _dbh_get_autoinc_seq { }; # trigger_body is a LONG - $dbh->{LongReadLen} = 64 * 1024 if ($dbh->{LongReadLen} < 64 * 1024); + local $dbh->{LongReadLen} = 64 * 1024 if ($dbh->{LongReadLen} < 64 * 1024); my $sth; + my $source_name; + if ( ref $source->name ne 'SCALAR' ) { + $source_name = $source->name; + } + else { + $source_name = ${$source->name}; + } + # check for fully-qualified name (eg. SCHEMA.TABLENAME) - if ( my ( $schema, $table ) = $source->name =~ /(\w+)\.(\w+)/ ) { + if ( my ( $schema, $table ) = $source_name =~ /(\w+)\.(\w+)/ ) { $sql = q{ SELECT trigger_body FROM ALL_TRIGGERS t WHERE t.owner = ? AND t.table_name = ? @@ -69,7 +78,7 @@ sub _dbh_get_autoinc_seq { } else { $sth = $dbh->prepare($sql); - $sth->execute( uc( $source->name ) ); + $sth->execute( uc( $source_name ) ); } while (my ($insert_trigger) = $sth->fetchrow_array) { return uc($1) if $insert_trigger =~ m!(\w+)\.nextval!i; # col name goes here??? @@ -139,7 +148,7 @@ Returns the sequence name for an autoincrement column sub get_autoinc_seq { my ($self, $source, $col) = @_; - + $self->dbh_do('_dbh_get_autoinc_seq', $source, $col); } @@ -195,7 +204,6 @@ for your timestamps, use something like this: sub connect_call_datetime_setup { my $self = shift; - my $dbh = $self->_get_dbh; my $date_format = $ENV{NLS_DATE_FORMAT} ||= 'YYYY-MM-DD HH24:MI:SS'; my $timestamp_format = $ENV{NLS_TIMESTAMP_FORMAT} ||= @@ -203,15 +211,15 @@ sub connect_call_datetime_setup { my $timestamp_tz_format = $ENV{NLS_TIMESTAMP_TZ_FORMAT} ||= 'YYYY-MM-DD HH24:MI:SS.FF TZHTZM'; - $dbh->do("alter session set nls_date_format = '$date_format'"); - $dbh->do("alter session set nls_timestamp_format = '$timestamp_format'"); - $dbh->do("alter session set nls_timestamp_tz_format='$timestamp_tz_format'"); -} - -sub _svp_begin { - my ($self, $name) = @_; - - $self->_get_dbh->do("SAVEPOINT $name"); + $self->_do_query( + "alter session set nls_date_format = '$date_format'" + ); + $self->_do_query( + "alter session set nls_timestamp_format = '$timestamp_format'" + ); + $self->_do_query( + "alter session set nls_timestamp_tz_format='$timestamp_tz_format'" + ); } =head2 source_bind_attributes @@ -231,29 +239,44 @@ table with more than one LOB column. =cut -sub source_bind_attributes +sub source_bind_attributes { - my $self = shift; - my($source) = @_; + require DBD::Oracle; + my $self = shift; + my($source) = @_; - my %bind_attributes; + my %bind_attributes; - foreach my $column ($source->columns) { - my $data_type = $source->column_info($column)->{data_type} || ''; - next unless $data_type; + foreach my $column ($source->columns) { + my $data_type = $source->column_info($column)->{data_type} || ''; + next unless $data_type; - my %column_bind_attrs = $self->bind_attribute_by_data_type($data_type); + my %column_bind_attrs = $self->bind_attribute_by_data_type($data_type); - if ($data_type =~ /^[BC]LOB$/i) { - $column_bind_attrs{'ora_type'} - = uc($data_type) eq 'CLOB' ? ORA_CLOB : ORA_BLOB; - $column_bind_attrs{'ora_field'} = $column; - } + if ($data_type =~ /^[BC]LOB$/i) { + if ($DBD::Oracle::VERSION eq '1.23') { + $self->throw_exception( +"BLOB/CLOB support in DBD::Oracle == 1.23 is broken, use an earlier or later ". +"version.\n\nSee: https://rt.cpan.org/Public/Bug/Display.html?id=46016\n" + ); + } - $bind_attributes{$column} = \%column_bind_attrs; - } + $column_bind_attrs{'ora_type'} = uc($data_type) eq 'CLOB' + ? DBD::Oracle::ORA_CLOB() + : DBD::Oracle::ORA_BLOB() + ; + $column_bind_attrs{'ora_field'} = $column; + } - return \%bind_attributes; + $bind_attributes{$column} = \%column_bind_attrs; + } + + return \%bind_attributes; +} + +sub _svp_begin { + my ($self, $name) = @_; + $self->_get_dbh->do("SAVEPOINT $name"); } # Oracle automatically releases a savepoint when you start another one with the @@ -261,16 +284,82 @@ sub source_bind_attributes sub _svp_release { 1 } sub _svp_rollback { - my ($self, $name) = @_; + my ($self, $name) = @_; + $self->_get_dbh->do("ROLLBACK TO SAVEPOINT $name") +} + +=head2 relname_to_table_alias + +L uses L names as table aliases in +queries. + +Unfortunately, Oracle doesn't support identifiers over 30 chars in length, so +the L name is shortened and appended with half of an +MD5 hash. + +See L. - $self->_get_dbh->do("ROLLBACK TO SAVEPOINT $name") +=cut + +sub relname_to_table_alias { + my $self = shift; + my ($relname, $join_count) = @_; + + 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 $new_alias; } -=head1 AUTHORS +=head2 with_deferred_fk_checks + +Runs a coderef between: + + alter session set constraints = deferred + ... + alter session set constraints = immediate + +to defer foreign key checks. + +Constraints must be declared C for this to work. + +=cut + +sub with_deferred_fk_checks { + my ($self, $sub) = @_; + + 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 }); +} -Andy Grundman +=head1 AUTHOR -Scott Connelly +See L. =head1 LICENSE