X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FDBIx%2FClass%2FStorage%2FDBI.pm;h=1448bc396b51941e92be91f24c4840009035684f;hb=3b80fa31b60050d4c8df91457ba6fd51b579a7a6;hp=ed2ab1b63869b4a8fd92c1982c17ad7a7ce4f3dc;hpb=a85b7ebe9762ca64a08468f6c8f27a0ae583d38c;p=dbsrgits%2FDBIx-Class.git diff --git a/lib/DBIx/Class/Storage/DBI.pm b/lib/DBIx/Class/Storage/DBI.pm index ed2ab1b..1448bc3 100644 --- a/lib/DBIx/Class/Storage/DBI.pm +++ b/lib/DBIx/Class/Storage/DBI.pm @@ -10,24 +10,28 @@ use mro 'c3'; use Carp::Clan qw/^DBIx::Class|^Try::Tiny/; use DBI; use DBIx::Class::Storage::DBI::Cursor; -use DBIx::Class::Storage::Statistics; use Scalar::Util qw/refaddr weaken reftype blessed/; -use Data::Dumper::Concise 'Dumper'; +use List::Util qw/first/; use Sub::Name 'subname'; use Try::Tiny; -use File::Path 'make_path'; +use overload (); use namespace::clean; # default cursor class, overridable in connect_info attributes __PACKAGE__->cursor_class('DBIx::Class::Storage::DBI::Cursor'); -__PACKAGE__->mk_group_accessors('inherited' => qw/sql_maker_class sql_limit_dialect/); +__PACKAGE__->mk_group_accessors('inherited' => qw/ + sql_maker_class sql_limit_dialect sql_quote_char sql_name_sep +/); + +__PACKAGE__->sql_name_sep('.'); + __PACKAGE__->sql_maker_class('DBIx::Class::SQLMaker'); __PACKAGE__->mk_group_accessors('simple' => qw/ _connect_info _dbi_connect_info _dbic_connect_attributes _driver_determined - _dbh _dbh_details _conn_pid _conn_tid _sql_maker _sql_maker_opts + _dbh _dbh_details _conn_pid _sql_maker _sql_maker_opts transaction_depth _dbh_autocommit savepoints /); @@ -54,7 +58,13 @@ __PACKAGE__->mk_group_accessors('simple' => @storage_options); # will get the same rdbms version). _determine_supports_X does not need to # exist on a driver, as we ->can for it before calling. -my @capabilities = (qw/insert_returning placeholders typeless_placeholders join_optimizer/); +my @capabilities = (qw/ + insert_returning + insert_returning_bound + placeholders + typeless_placeholders + join_optimizer +/); __PACKAGE__->mk_group_accessors( dbms_capability => map { "_supports_$_" } @capabilities ); __PACKAGE__->mk_group_accessors( use_dbms_capability => map { "_use_$_" } (@capabilities ) ); @@ -166,25 +176,38 @@ sub new { # of a fork()ed child to kill the parent's shared DBI handle, # *before perl reaches the DESTROY in this package* # Yes, it is ugly and effective. +# Additionally this registry is used by the CLONE method to +# make sure no handles are shared between threads { my %seek_and_destroy; sub _arm_global_destructor { my $self = shift; - my $key = Scalar::Util::refaddr ($self); + my $key = refaddr ($self); $seek_and_destroy{$key} = $self; - Scalar::Util::weaken ($seek_and_destroy{$key}); + weaken ($seek_and_destroy{$key}); } END { local $?; # just in case the DBI destructor changes it somehow # destroy just the object if not native to this process/thread - $_->_preserve_foreign_dbh for (grep + $_->_verify_pid for (grep { defined $_ } values %seek_and_destroy ); } + + sub CLONE { + # As per DBI's recommendation, DBIC disconnects all handles as + # soon as possible (DBIC will reconnect only on demand from within + # the thread) + for (values %seek_and_destroy) { + next unless $_; + $_->{_dbh_gen}++; # so that existing cursors will drop as well + $_->_dbh(undef); + } + } } sub DESTROY { @@ -193,53 +216,28 @@ sub DESTROY { # some databases spew warnings on implicit disconnect local $SIG{__WARN__} = sub {}; $self->_dbh(undef); -} - -sub _preserve_foreign_dbh { - my $self = shift; - - return unless $self->_dbh; - - $self->_verify_tid; - - return unless $self->_dbh; - - $self->_verify_pid; + # this op is necessary, since the very last perl runtime statement + # triggers a global destruction shootout, and the $SIG localization + # may very well be destroyed before perl actually gets to do the + # $dbh undef + 1; } # handle pid changes correctly - do not destroy parent's connection sub _verify_pid { my $self = shift; - return if ( defined $self->_conn_pid and $self->_conn_pid == $$ ); - - $self->_dbh->{InactiveDestroy} = 1; - $self->_dbh(undef); - $self->{_dbh_gen}++; - - return; -} - -# very similar to above, but seems to FAIL if I set InactiveDestroy -sub _verify_tid { - my $self = shift; - - if ( ! defined $self->_conn_tid ) { - return; # no threads - } - elsif ( $self->_conn_tid == threads->tid ) { - return; # same thread + my $pid = $self->_conn_pid; + if( defined $pid and $pid != $$ and my $dbh = $self->_dbh ) { + $dbh->{InactiveDestroy} = 1; + $self->{_dbh_gen}++; + $self->_dbh(undef); } - #$self->_dbh->{InactiveDestroy} = 1; # why does t/51threads.t fail...? - $self->_dbh(undef); - $self->{_dbh_gen}++; - return; } - =head2 connect_info This method is normally called by L, which @@ -454,6 +452,12 @@ Sets a specific SQL::Abstract::Limit-style limit dialect, overriding the default L setting of the storage (if any). For a list of available limit dialects see L. +=item quote_names + +When true automatically sets L and L to the characters +appropriate for your particular RDBMS. This option is preferred over specifying +L directly. + =item quote_char Specifies what characters to use to quote table and column names. @@ -600,8 +604,18 @@ sub connect_info { my @args = @{ $info->{arguments} }; - $self->_dbi_connect_info([@args, - %attrs && !(ref $args[0] eq 'CODE') ? \%attrs : ()]); + if (keys %attrs and ref $args[0] ne 'CODE') { + carp + 'You provided explicit AutoCommit => 0 in your connection_info. ' + . 'This is almost universally a bad idea (see the footnotes of ' + . 'DBIx::Class::Storage::DBI for more info). If you still want to ' + . 'do this you can set $ENV{DBIC_UNSAFE_AUTOCOMMIT_OK} to disable ' + . 'this warning.' + if ! $attrs{AutoCommit} and ! $ENV{DBIC_UNSAFE_AUTOCOMMIT_OK}; + + push @args, \%attrs if keys %attrs; + } + $self->_dbi_connect_info(\@args); # FIXME - dirty: # save attributes them in a separate accessor so they are always @@ -661,7 +675,7 @@ sub _normalize_connect_info { delete @attrs{@storage_opts} if @storage_opts; my @sql_maker_opts = grep exists $attrs{$_}, - qw/limit_dialect quote_char name_sep/; + qw/limit_dialect quote_char name_sep quote_names/; @{ $info{sql_maker_options} }{@sql_maker_opts} = delete @attrs{@sql_maker_opts} if @sql_maker_opts; @@ -671,11 +685,12 @@ sub _normalize_connect_info { return \%info; } -sub _default_dbi_connect_attributes { - return { +sub _default_dbi_connect_attributes () { + +{ AutoCommit => 1, - RaiseError => 1, PrintError => 0, + RaiseError => 1, + ShowErrorStatement => 1, }; } @@ -784,7 +799,7 @@ sub txn_do { local $self->{_in_dbh_do} = 1; my @result; - my $want_array = wantarray; + my $want = wantarray; my $tried = 0; while(1) { @@ -796,10 +811,10 @@ sub txn_do { try { $self->txn_begin; my $txn_start_depth = $self->transaction_depth; - if($want_array) { + if($want) { @result = $coderef->(@$args); } - elsif(defined $want_array) { + elsif(defined $want) { $result[0] = $coderef->(@$args); } else { @@ -818,7 +833,7 @@ sub txn_do { $exception = $_; }; - if(! defined $exception) { return $want_array ? @result : $result[0] } + if(! defined $exception) { return wantarray ? @result : $result[0] } if($self->transaction_depth > 1 || $tried++ || $self->connected) { my $rollback_exception; @@ -921,7 +936,7 @@ sub connected { sub _seems_connected { my $self = shift; - $self->_preserve_foreign_dbh; + $self->_verify_pid; my $dbh = $self->_dbh or return 0; @@ -969,7 +984,7 @@ sub dbh { # this is the internal "get dbh or connect (don't check)" method sub _get_dbh { my $self = shift; - $self->_preserve_foreign_dbh; + $self->_verify_pid; $self->_populate_dbh unless $self->_dbh; return $self->_dbh; } @@ -992,18 +1007,39 @@ sub sql_maker { "Your storage class ($s_class) does not set sql_limit_dialect and you " . 'have not supplied an explicit limit_dialect in your connection_info. ' . 'DBIC will attempt to use the GenericSubQ dialect, which works on most ' - . 'databases but can be (and often is) painfully slow.' + . 'databases but can be (and often is) painfully slow. ' + . "Please file an RT ticket against '$s_class' ." ); 'GenericSubQ'; } ; + my ($quote_char, $name_sep); + + if ($opts{quote_names}) { + $quote_char = (delete $opts{quote_char}) || $self->sql_quote_char || do { + my $s_class = (ref $self) || $self; + carp ( + "You requested 'quote_names' but your storage class ($s_class) does " + . 'not explicitly define a default sql_quote_char and you have not ' + . 'supplied a quote_char as part of your connection_info. DBIC will ' + .q{default to the ANSI SQL standard quote '"', which works most of } + . "the time. Please file an RT ticket against '$s_class'." + ); + + '"'; # RV + }; + + $name_sep = (delete $opts{name_sep}) || $self->sql_name_sep; + } + $self->_sql_maker($sql_maker_class->new( bindtype=>'columns', array_datatypes => 1, limit_dialect => $dialect, - name_sep => '.', + ($quote_char ? (quote_char => $quote_char) : ()), + name_sep => ($name_sep || '.'), %opts, )); } @@ -1023,8 +1059,7 @@ sub _populate_dbh { $self->_dbh($self->_connect(@info)); - $self->_conn_pid($$); - $self->_conn_tid(threads->tid) if $INC{'threads.pm'}; + $self->_conn_pid($$) if $^O ne 'MSWin32'; # on win32 these are in fact threads $self->_determine_driver; @@ -1124,7 +1159,13 @@ sub _server_info { } sub _get_server_version { - shift->_get_dbh->get_info(18); + shift->_dbh_get_info(18); +} + +sub _dbh_get_info { + my ($self, $info) = @_; + + return try { $self->_get_dbh->get_info($info) } || undef; } sub _determine_driver { @@ -1168,6 +1209,8 @@ sub _determine_driver { $self->_driver_determined(1); + Class::C3->reinitialize() if DBIx::Class::_ENV_::OLD_MRO; + $self->_init; # run driver-specific initializations $self->_run_connection_actions @@ -1263,6 +1306,27 @@ sub _connect { unless ($self->unsafe) { + $self->throw_exception( + 'Refusing clobbering of {HandleError} installed on externally supplied ' + ."DBI handle $dbh. Either remove the handler or use the 'unsafe' attribute." + ) if $dbh->{HandleError} and ref $dbh->{HandleError} ne '__DBIC__DBH__ERROR__HANDLER__'; + + # Default via _default_dbi_connect_attributes is 1, hence it was an explicit + # request, or an external handle. Complain and set anyway + unless ($dbh->{RaiseError}) { + carp( ref $info[0] eq 'CODE' + + ? "The 'RaiseError' of the externally supplied DBI handle is set to false. " + ."DBIx::Class will toggle it back to true, unless the 'unsafe' connect " + .'attribute has been supplied' + + : 'RaiseError => 0 supplied in your connection_info, without an explicit ' + .'unsafe => 1. Toggling RaiseError back to true' + ); + + $dbh->{RaiseError} = 1; + } + # this odd anonymous coderef dereference is in fact really # necessary to avoid the unwanted effect described in perl5 # RT#75792 @@ -1270,7 +1334,9 @@ sub _connect { my $weak_self = $_[0]; weaken $weak_self; - $_[1]->{HandleError} = sub { + # the coderef is blessed so we can distinguish it from externally + # supplied handles (which must be preserved) + $_[1]->{HandleError} = bless sub { if ($weak_self) { $weak_self->throw_exception("DBI Exception: $_[0]"); } @@ -1279,12 +1345,8 @@ sub _connect { # the scope of DBIC croak ("DBI Exception (unhandled by DBIC, ::Schema GCed): $_[0]"); } - }; + }, '__DBIC__DBH__ERROR__HANDLER__'; }->($self, $dbh); - - $dbh->{ShowErrorStatement} = 1; - $dbh->{RaiseError} = 1; - $dbh->{PrintError} = 0; } } catch { @@ -1426,7 +1488,10 @@ sub _dbh_begin_work { sub txn_commit { my $self = shift; - if ($self->{transaction_depth} == 1) { + if (! $self->_dbh) { + $self->throw_exception('cannot COMMIT on a disconnected handle'); + } + elsif ($self->{transaction_depth} == 1) { $self->debugobj->txn_commit() if ($self->debug); $self->_dbh_commit; @@ -1438,6 +1503,17 @@ sub txn_commit { $self->svp_release if $self->auto_savepoint; } + elsif (! $self->_dbh->FETCH('AutoCommit') ) { + + carp "Storage transaction_depth $self->{transaction_depth} does not match " + ."false AutoCommit of $self->{_dbh}, attempting COMMIT anyway"; + + $self->debugobj->txn_commit() + if ($self->debug); + $self->_dbh_commit; + $self->{transaction_depth} = 0 + if $self->_dbh_autocommit; + } else { $self->throw_exception( 'Refusing to commit without a started transaction' ); } @@ -1567,10 +1643,21 @@ sub _dbh_execute { foreach my $data (@data) { my $ref = ref $data; - $data = $ref && $ref ne 'ARRAY' ? ''.$data : $data; # stringify args (except arrayrefs) - $sth->bind_param($placeholder_index, $data, $attributes); - $placeholder_index++; + if ($ref and overload::Method($data, '""') ) { + $data = "$data"; + } + elsif ($ref eq 'SCALAR') { # any scalarrefs are assumed to be bind_inouts + $sth->bind_param_inout( + $placeholder_index++, + $data, + $self->_max_column_bytesize($ident, $column_name), + $attributes + ); + next; + } + + $sth->bind_param($placeholder_index++, $data, $attributes); } } @@ -1590,14 +1677,12 @@ sub _execute { $self->dbh_do('_dbh_execute', @_); # retry over disconnects } -sub insert { +sub _prefetch_autovalues { my ($self, $source, $to_insert) = @_; my $colinfo = $source->columns_info; - # mix with auto-nextval marked values (a bit of a speed hit, but - # no saner way to handle this yet) - my $auto_nextvals = {} ; + my %values; for my $col (keys %$colinfo) { if ( $colinfo->{$col}{auto_nextval} @@ -1608,8 +1693,8 @@ sub insert { ref $to_insert->{$col} eq 'SCALAR' ) ) { - $auto_nextvals->{$col} = $self->_sequence_fetch( - 'nextval', + $values{$col} = $self->_sequence_fetch( + 'NEXTVAL', ( $colinfo->{$col}{sequence} ||= $self->_dbh_get_autoinc_seq($self->_get_dbh, $source, $col) ), @@ -1617,25 +1702,33 @@ sub insert { } } + \%values; +} + +sub insert { + my ($self, $source, $to_insert) = @_; + + my $prefetched_values = $self->_prefetch_autovalues($source, $to_insert); + # fuse the values - $to_insert = { %$to_insert, %$auto_nextvals }; + $to_insert = { %$to_insert, %$prefetched_values }; # list of primary keys we try to fetch from the database # both not-exsists and scalarrefs are considered my %fetch_pks; - %fetch_pks = ( map - { $_ => scalar keys %fetch_pks } # so we can preserve order for prettyness - grep - { ! exists $to_insert->{$_} or ref $to_insert->{$_} eq 'SCALAR' } - $source->primary_columns - ); + for ($source->primary_columns) { + $fetch_pks{$_} = scalar keys %fetch_pks # so we can preserve order for prettyness + if ! exists $to_insert->{$_} or ref $to_insert->{$_} eq 'SCALAR'; + } - my $sqla_opts; + my ($sqla_opts, @ir_container); if ($self->_use_insert_returning) { # retain order as declared in the resultsource for (sort { $fetch_pks{$a} <=> $fetch_pks{$b} } keys %fetch_pks ) { push @{$sqla_opts->{returning}}, $_; + $sqla_opts->{returning_container} = \@ir_container + if $self->_use_insert_returning_bound; } } @@ -1643,20 +1736,20 @@ sub insert { my ($rv, $sth) = $self->_execute('insert' => [], $source, $bind_attributes, $to_insert, $sqla_opts); - my %returned_cols = %$auto_nextvals; + my %returned_cols; if (my $retlist = $sqla_opts->{returning}) { - my @ret_vals = try { + @ir_container = try { local $SIG{__WARN__} = sub {}; my @r = $sth->fetchrow_array; $sth->finish; @r; - }; + } unless @ir_container; - @returned_cols{@$retlist} = @ret_vals if @ret_vals; + @returned_cols{@$retlist} = @ir_container if @ir_container; } - return \%returned_cols; + return { %$prefetched_values, %returned_cols }; } @@ -1683,10 +1776,11 @@ sub insert_bulk { $msg, $cols->[$col_idx], do { + require Data::Dumper::Concise; local $Data::Dumper::Maxdepth = 1; # don't dump objects, if any - Dumper { + Data::Dumper::Concise::Dumper ({ map { $cols->[$_] => $data->[$slice_idx][$_] } (0 .. $#$cols) - }, + }), } ); }; @@ -1728,15 +1822,15 @@ sub insert_bulk { my ($sql, $bind) = $self->_prep_for_execute ( 'insert', undef, $source, [\%colvalues] ); - my @bind = @$bind; - my $empty_bind = 1 if (not @bind) && - (grep { ref $_ eq 'SCALAR' } values %colvalues) == @$cols; + if (! @$bind) { + # if the bindlist is empty - make sure all "values" are in fact + # literal scalarrefs. If not the case this means the storage ate + # them away (e.g. the NoBindVars component) and interpolated them + # directly into the SQL. This obviosly can't be good for multi-inserts - if ((not @bind) && (not $empty_bind)) { - $self->throw_exception( - 'Cannot insert_bulk without support for placeholders' - ); + $self->throw_exception('Cannot insert_bulk without support for placeholders') + if first { ref $_ ne 'SCALAR' } values %colvalues; } # neither _execute_array, nor _execute_inserts_with_no_binds are @@ -1744,24 +1838,24 @@ sub insert_bulk { # scope guard my $guard = $self->txn_scope_guard; - $self->_query_start( $sql, [ dummy => '__BULK_INSERT__' ] ); + $self->_query_start( $sql, @$bind ? [ dummy => '__BULK_INSERT__' ] : () ); my $sth = $self->sth($sql); my $rv = do { - if ($empty_bind) { - # bind_param_array doesn't work if there are no binds - $self->_dbh_execute_inserts_with_no_binds( $sth, scalar @$data ); + if (@$bind) { + #@bind = map { ref $_ ? ''.$_ : $_ } @bind; # stringify args + $self->_execute_array( $source, $sth, $bind, $cols, $data ); } else { -# @bind = map { ref $_ ? ''.$_ : $_ } @bind; # stringify args - $self->_execute_array( $source, $sth, \@bind, $cols, $data ); + # bind_param_array doesn't work if there are no binds + $self->_dbh_execute_inserts_with_no_binds( $sth, scalar @$data ); } }; - $self->_query_end( $sql, [ dummy => '__BULK_INSERT__' ] ); + $self->_query_end( $sql, @$bind ? [ dummy => '__BULK_INSERT__' ] : () ); $guard->commit; - return (wantarray ? ($rv, $sth, @bind) : $rv); + return (wantarray ? ($rv, $sth, @$bind) : $rv); } sub _execute_array { @@ -1804,6 +1898,14 @@ sub _execute_array { $err = shift; }; + # Not all DBDs are create equal. Some throw on error, some return + # an undef $rv, and some set $sth->err - try whatever we can + $err = ($sth->errstr || 'UNKNOWN ERROR ($sth->errstr is unset)') if ( + ! defined $err + and + ( !defined $rv or $sth->err ) + ); + # Statement must finish even if there was an exception. try { $sth->finish @@ -1812,9 +1914,6 @@ sub _execute_array { $err = shift unless defined $err }; - $err = $sth->errstr - if (! defined $err and $sth->err); - if (defined $err) { my $i = 0; ++$i while $i <= $#$tuple_status && !ref $tuple_status->[$i]; @@ -1822,9 +1921,10 @@ sub _execute_array { $self->throw_exception("Unexpected populate error: $err") if ($i > $#$tuple_status); + require Data::Dumper::Concise; $self->throw_exception(sprintf "%s for populate slice:\n%s", ($tuple_status->[$i][1] || $err), - Dumper { map { $cols->[$_] => $data->[$i][$_] } (0 .. $#$cols) }, + Data::Dumper::Concise::Dumper( { map { $cols->[$_] => $data->[$i][$_] } (0 .. $#$cols) } ), ); } @@ -1850,15 +1950,14 @@ sub _dbh_execute_inserts_with_no_binds { } catch { $err = shift; + }; + + # Make sure statement is finished even if there was an exception. + try { + $sth->finish } - finally { - # Make sure statement is finished even if there was an exception. - try { - $sth->finish - } - catch { - $err = shift unless defined $err; - }; + catch { + $err = shift unless defined $err; }; $self->throw_exception($err) if defined $err; @@ -2015,7 +2114,7 @@ sub _select_args { from => $ident, where => $where, $rs_alias && $alias2source->{$rs_alias} - ? ( _rsroot_source_handle => $alias2source->{$rs_alias}->handle ) + ? ( _rsroot_rsrc => $alias2source->{$rs_alias} ) : () , }; @@ -2077,9 +2176,7 @@ sub _select_args { && @{$attrs->{group_by}} && - $attrs->{_prefetch_select} - && - @{$attrs->{_prefetch_select}} + $attrs->{_prefetch_selector_range} ) ) { ($ident, $select, $where, $attrs) @@ -2191,7 +2288,18 @@ sub _dbh_sth { # XXX You would think RaiseError would make this impossible, # but apparently that's not true :( - $self->throw_exception($dbh->errstr) if !$sth; + $self->throw_exception( + $dbh->errstr + || + sprintf( "\$dbh->prepare() of '%s' through %s failed *silently* without " + .'an exception and/or setting $dbh->errstr', + length ($sql) > 20 + ? substr($sql, 0, 20) . '...' + : $sql + , + 'DBD::' . $dbh->{Driver}{Name}, + ) + ) if !$sth; $sth; } @@ -2466,10 +2574,10 @@ sub create_ddl_dir { } else { -d $dir or - make_path ("$dir") # make_path does not like objects (i.e. Path::Class::Dir) + (require File::Path and File::Path::make_path ("$dir")) # make_path does not like objects (i.e. Path::Class::Dir) or $self->throw_exception( - "Failed to create '$dir': " . ($! || $@ || 'error unknow') + "Failed to create '$dir': " . ($! || $@ || 'error unknown') ); } @@ -2624,6 +2732,7 @@ sub deployment_statements { my $filename = $schema->ddl_filename($type, $version, $dir); if(-f $filename) { + # FIXME replace this block when a proper sane sql parser is available my $file; open($file, "<$filename") or $self->throw_exception("Can't open $filename ($!)"); @@ -2649,8 +2758,7 @@ sub deployment_statements { ); my @ret; - my $wa = wantarray; - if ($wa) { + if (wantarray) { @ret = $tr->translate; } else { @@ -2660,15 +2768,17 @@ sub deployment_statements { $self->throw_exception( 'Unable to produce deployment statements: ' . $tr->error) unless (@ret && defined $ret[0]); - return $wa ? @ret : $ret[0]; + return wantarray ? @ret : $ret[0]; } +# FIXME deploy() currently does not accurately report sql errors +# Will always return true while errors are warned sub deploy { my ($self, $schema, $type, $sqltargs, $dir) = @_; my $deploy = sub { my $line = shift; - return if($line =~ /^--/); return if(!$line); + return if($line =~ /^--/); # next if($line =~ /^DROP/m); return if($line =~ /^BEGIN TRANSACTION/m); return if($line =~ /^COMMIT/m); @@ -2690,7 +2800,8 @@ sub deploy { } } elsif (@statements == 1) { - foreach my $line ( split(";\n", $statements[0])) { + # split on single line comments and end of statements + foreach my $line ( split(/\s*--.*\n|;\n/, $statements[0])) { $deploy->( $line ); } } @@ -2785,6 +2896,70 @@ sub relname_to_table_alias { return $alias; } +# The size in bytes to use for DBI's ->bind_param_inout, this is the generic +# version and it may be necessary to amend or override it for a specific storage +# if such binds are necessary. +sub _max_column_bytesize { + my ($self, $source, $col) = @_; + + my $inf = $source->column_info($col); + return $inf->{_max_bytesize} ||= do { + + my $max_size; + + if (my $data_type = $inf->{data_type}) { + $data_type = lc($data_type); + + # String/sized-binary types + if ($data_type =~ /^(?:l?(?:var)?char(?:acter)?(?:\s*varying)? + |(?:var)?binary(?:\s*varying)?|raw)\b/x + ) { + $max_size = $inf->{size}; + } + # Other charset/unicode types, assume scale of 4 + elsif ($data_type =~ /^(?:national\s*character(?:\s*varying)?|nchar + |univarchar + |nvarchar)\b/x + ) { + $max_size = $inf->{size} * 4 if $inf->{size}; + } + # Blob types + elsif ($self->_is_lob_type($data_type)) { + # default to longreadlen + } + else { + $max_size = 100; # for all other (numeric?) datatypes + } + } + + $max_size ||= $self->_get_dbh->{LongReadLen} || 8000; + }; +} + +# Determine if a data_type is some type of BLOB +# FIXME: these regexes are expensive, result of these checks should be cached in +# the column_info . +sub _is_lob_type { + my ($self, $data_type) = @_; + $data_type && ($data_type =~ /lob|bfile|text|image|bytea|memo/i + || $data_type =~ /^long(?:\s+(?:raw|bit\s*varying|varbit|binary + |varchar|character\s*varying|nvarchar + |national\s*character\s*varying))?\z/xi); +} + +sub _is_binary_lob_type { + my ($self, $data_type) = @_; + $data_type && ($data_type =~ /blob|bfile|image|bytea/i + || $data_type =~ /^long(?:\s+(?:raw|bit\s*varying|varbit|binary))?\z/xi); +} + +sub _is_text_lob_type { + my ($self, $data_type) = @_; + $data_type && ($data_type =~ /^(?:clob|memo)\z/i + || $data_type =~ /^long(?:\s+(?:varchar|character\s*varying|nvarchar + |national\s*character\s*varying))\z/xi); +} + 1; =head1 USAGE NOTES