X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FDBIx%2FClass%2FStorage%2FDBI%2FOracle%2FGeneric.pm;h=3e74d427e67a5151c5cab32ce1c4e262054eb43c;hb=ed7ab0f4ce1a9118ea6285ee562ef003085a6b64;hp=a9da2c77b7632165249148adabf8b2a3e2ec11cd;hpb=0d1207e89fdfd78830e1ac236a4ac5d1fd72cda2;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 a9da2c7..3e74d42 100644 --- a/lib/DBIx/Class/Storage/DBI/Oracle/Generic.pm +++ b/lib/DBIx/Class/Storage/DBI/Oracle/Generic.pm @@ -2,6 +2,9 @@ package DBIx::Class::Storage::DBI::Oracle::Generic; use strict; use warnings; +use Scope::Guard (); +use Context::Preserve (); +use Try::Tiny; =head1 NAME @@ -9,15 +12,17 @@ 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 @@ -26,6 +31,22 @@ This class implements autoincrements for Oracle. use base qw/DBIx::Class::Storage::DBI/; use mro 'c3'; +sub deployment_statements { + my $self = shift;; + my ($schema, $type, $version, $dir, $sqltargs, @rest) = @_; + + $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, $source, @columns) = @_; my @ids = (); @@ -40,43 +61,47 @@ sub _dbh_last_insert_id { sub _dbh_get_autoinc_seq { my ($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 - local $dbh->{LongReadLen} = 64 * 1024 if ($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; } @@ -86,12 +111,16 @@ sub _ping { my $dbh = $self->_dbh or return 0; local $dbh->{RaiseError} = 1; + local $dbh->{PrintError} = 0; - eval { - $dbh->do("select 1 from dual"); + my $rc = 1; + try { + $dbh->do('select 1 from dual'); + } catch { + $rc = 0; }; - return $@ ? 0 : 1; + return $rc; } sub _dbh_execute { @@ -104,14 +133,16 @@ sub _dbh_execute { RETRY: { do { - eval { + my $exception; + try { if ($wantarray) { @res = $self->next::method(@_); } else { $res[0] = $self->next::method(@_); } + } catch { + $exception = shift; }; - $exception = $@; if ($exception =~ /ORA-01003/) { # ORA-01003: no statement parsed (someone changed the table somehow, # invalidating your cursor.) @@ -125,7 +156,7 @@ sub _dbh_execute { $self->throw_exception($exception) if $exception; - wantarray ? @res : $res[0] + $wantarray ? @res : $res[0] } =head2 get_autoinc_seq @@ -150,7 +181,7 @@ names to uppercase sub columns_info_for { my ($self, $table) = @_; - $self->next::method(uc($table)); + $self->next::method($table); } =head2 datetime_parser_type @@ -168,10 +199,10 @@ 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. +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. @@ -199,17 +230,15 @@ sub connect_call_datetime_setup { 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'"); + "alter session set nls_date_format = '$date_format'" + ); $self->_do_query( -"alter session set nls_timestamp_tz_format='$timestamp_tz_format'"); -} - -sub _svp_begin { - my ($self, $name) = @_; - - $self->dbh->do("SAVEPOINT $name"); + "alter session set nls_timestamp_format = '$timestamp_format'" + ); + $self->_do_query( + "alter session set nls_timestamp_tz_format='$timestamp_tz_format'" + ); } =head2 source_bind_attributes @@ -229,30 +258,44 @@ 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' ? - DBD::Oracle::ORA_CLOB() : - DBD::Oracle::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 $name"); } # Oracle automatically releases a savepoint when you start another one with the @@ -260,9 +303,77 @@ sub source_bind_attributes sub _svp_release { 1 } sub _svp_rollback { - my ($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. + +=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 $new_alias; +} + +=head2 with_deferred_fk_checks + +Runs a coderef between: + + alter session set constraints = deferred + ... + alter session set constraints = immediate + +to defer foreign key checks. + +Constraints must be declared C for this to work. + +=cut + +sub with_deferred_fk_checks { + my ($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'); + }); - $self->dbh->do("ROLLBACK TO SAVEPOINT $name") + return Context::Preserve::preserve_context(sub { $sub->() }, + after => sub { $txn_scope_guard->commit }); } =head1 AUTHOR