X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FDBIx%2FClass%2FStorage%2FDBI%2FOracle%2FGeneric.pm;h=a993977fe7756c20063149c99d36445f45314497;hb=f1693c0d25bc7b9f3efa50199a13c8b42cd7a056;hp=87715ed1611e1f730c1517bd0a0be1ddd5ba14e4;hpb=c2481821ea4d4e988a3586a126a103aa676bec47;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 87715ed..a993977 100644 --- a/lib/DBIx/Class/Storage/DBI/Oracle/Generic.pm +++ b/lib/DBIx/Class/Storage/DBI/Oracle/Generic.pm @@ -1,35 +1,50 @@ package DBIx::Class::Storage::DBI::Oracle::Generic; -# -*- mode: cperl; cperl-indent-level: 2 -*- 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 =cut -use Carp::Clan qw/^DBIx::Class/; -use Scalar::Util (); +use base qw/DBIx::Class::Storage::DBI/; +use mro 'c3'; -use base qw/DBIx::Class::Storage::DBI::MultiDistinctEmulation/; +sub deployment_statements { + my $self = shift;; + my ($schema, $type, $version, $dir, $sqltargs, @rest) = @_; -# __PACKAGE__->load_components(qw/PK::Auto/); + $sqltargs ||= {}; + 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; + + my $oracle_version = eval { $self->_get_dbh->get_info(18) }; + + $sqltargs->{producer_args}{oracle_version} = $oracle_version; + + $self->next::method($schema, $type, $version, $dir, $sqltargs, @rest); +} sub _dbh_last_insert_id { my ($self, $dbh, $source, @columns) = @_; @@ -45,68 +60,62 @@ sub _dbh_last_insert_id { sub _dbh_get_autoinc_seq { my ($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' - }; + my $sql_maker = $self->sql_maker; - # trigger_body is a LONG - $dbh->{LongReadLen} = 64 * 1024 if ($dbh->{LongReadLen} < 64 * 1024); - - my $sth; - - # 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); - $sth->execute( uc($schema), uc($table) ); + my $source_name; + if ( ref $source->name eq 'SCALAR' ) { + $source_name = ${$source->name}; } else { - $sth = $dbh->prepare($sql); - $sth->execute( uc( $source->name ) ); + $source_name = $source->name; } + $source_name = uc($source_name) unless $sql_maker->quote_char; + + # 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 ) = $source_name =~ /(\w+)\.(\w+)/; + my ($sql, @bind) = $sql_maker->select ( + 'ALL_TRIGGERS', + ['trigger_body'], + { + $schema ? (owner => $schema) : (), + table_name => $table || $source_name, + triggering_event => 'INSERT', + status => 'ENABLED', + }, + ); + my $sth = $dbh->prepare($sql); + $sth->execute (@bind); + while (my ($insert_trigger) = $sth->fetchrow_array) { - return uc($1) if $insert_trigger =~ m!(\w+)\.nextval!i; # col name goes here??? + return $1 if $insert_trigger =~ m!("?\w+"?)\.nextval!i; # col name goes here??? } - $self->throw_exception("Unable to find a sequence INSERT trigger on table '" . $source->name . "'."); + $self->throw_exception("Unable to find a sequence INSERT trigger on table '$source_name'."); } sub _sequence_fetch { my ( $self, $type, $seq ) = @_; - my ($id) = $self->dbh->selectrow_array("SELECT ${seq}.${type} FROM DUAL"); + my ($id) = $self->_get_dbh->selectrow_array("SELECT ${seq}.${type} FROM DUAL"); return $id; } -sub connected { +sub _ping { my $self = shift; - - if ($self->SUPER::connected(@_)) { - my $dbh = $self->_dbh; - - my $ping_sth = $dbh->prepare_cached("select 1 from dual"); - - local $dbh->{RaiseError} = 1; - eval { - $ping_sth->execute; - $ping_sth->finish; - }; - - if ($@) { - return 0; - } else { - return 1; - } - } - - return 0; + + my $dbh = $self->_dbh or return 0; + + local $dbh->{RaiseError} = 1; + + eval { + $dbh->do("select 1 from dual"); + }; + + return $@ ? 0 : 1; } sub _dbh_execute { @@ -114,28 +123,28 @@ sub _dbh_execute { my ($dbh, $op, $extra_bind, $ident, $bind_attributes, @args) = @_; my $wantarray = wantarray; - my @res; - my $exception; - my $try = 2; - - while ($try--) { - eval { - if ($wantarray) { - @res = $self->SUPER::_dbh_execute(@_); + my (@res, $exception, $retried); + + RETRY: { + do { + eval { + if ($wantarray) { + @res = $self->next::method(@_); + } else { + $res[0] = $self->next::method(@_); + } + }; + $exception = $@; + if ($exception =~ /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 { - $res[0] = $self->SUPER::_dbh_execute(@_); + last RETRY; } - }; - $exception = $@; - if ($exception =~ /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; - } + } while (not $retried++); } $self->throw_exception($exception) if $exception; @@ -151,7 +160,7 @@ Returns the sequence name for an autoincrement column sub get_autoinc_seq { my ($self, $source, $col) = @_; - + $self->dbh_do('_dbh_get_autoinc_seq', $source, $col); } @@ -165,7 +174,7 @@ names to uppercase sub columns_info_for { my ($self, $table) = @_; - $self->next::method(uc($table)); + $self->next::method($table); } =head2 datetime_parser_type @@ -177,10 +186,109 @@ L. sub datetime_parser_type { return "DateTime::Format::Oracle"; } +=head2 connect_call_datetime_setup + +Used as: + + on_connect_call => 'datetime_setup' + +In L to set the session nls date, and +timestamp values for use with L and the +necessary environment variables for L, which is used +by it. + +Maximum allowable precision is used, unless the environment variables have +already been set. + +These are the defaults used: + + $ENV{NLS_DATE_FORMAT} ||= 'YYYY-MM-DD HH24:MI:SS'; + $ENV{NLS_TIMESTAMP_FORMAT} ||= 'YYYY-MM-DD HH24:MI:SS.FF'; + $ENV{NLS_TIMESTAMP_TZ_FORMAT} ||= 'YYYY-MM-DD HH24:MI:SS.FF TZHTZM'; + +To get more than second precision with L +for your timestamps, use something like this: + + use Time::HiRes 'time'; + my $ts = DateTime->from_epoch(epoch => time); + +=cut + +sub connect_call_datetime_setup { + my $self = shift; + + my $date_format = $ENV{NLS_DATE_FORMAT} ||= 'YYYY-MM-DD HH24:MI:SS'; + my $timestamp_format = $ENV{NLS_TIMESTAMP_FORMAT} ||= + 'YYYY-MM-DD HH24:MI:SS.FF'; + my $timestamp_tz_format = $ENV{NLS_TIMESTAMP_TZ_FORMAT} ||= + 'YYYY-MM-DD HH24:MI:SS.FF TZHTZM'; + + $self->_do_query( + "alter session set nls_date_format = '$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 + +Handle LOB types in Oracle. Under a certain size (4k?), you can get away +with the driver assuming your input is the deprecated LONG type if you +encode it as a hex string. That ain't gonna fly at larger values, where +you'll discover you have to do what this does. + +This method had to be overridden because we need to set ora_field to the +actual column, and that isn't passed to the call (provided by Storage) to +bind_attribute_by_data_type. + +According to L, the ora_field isn't always necessary, but +adding it doesn't hurt, and will save your bacon if you're modifying a +table with more than one LOB column. + +=cut + +sub source_bind_attributes +{ + require DBD::Oracle; + my $self = shift; + my($source) = @_; + + my %bind_attributes; + + 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); + + 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" + ); + } + + $column_bind_attrs{'ora_type'} = uc($data_type) eq 'CLOB' + ? DBD::Oracle::ORA_CLOB() + : DBD::Oracle::ORA_BLOB() + ; + $column_bind_attrs{'ora_field'} = $column; + } + + $bind_attributes{$column} = \%column_bind_attrs; + } + + return \%bind_attributes; +} + sub _svp_begin { - my ($self, $name) = @_; - - $self->dbh->do("SAVEPOINT $name"); + my ($self, $name) = @_; + $self->_get_dbh->do("SAVEPOINT $name"); } # Oracle automatically releases a savepoint when you start another one with the @@ -188,16 +296,82 @@ sub _svp_begin { sub _svp_release { 1 } sub _svp_rollback { - my ($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. - $self->dbh->do("ROLLBACK TO SAVEPOINT $name") +See L. + +=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