package Bio::DB::GFF::Adaptor::dbi::mysql;
=head1 NAME
Bio::DB::GFF::Adaptor::dbi::mysql -- Database adaptor for a specific mysql schema
=head1 SYNOPSIS
See L<Bio::DB::GFF>
=cut
# a simple mysql adaptor
use strict;
use Bio::DB::GFF::Util::Rearrange; # for rearrange()
use Bio::DB::GFF::Util::Binning;
use base qw(Bio::DB::GFF::Adaptor::dbi);
use constant MAX_SEGMENT => 100_000_000; # the largest a segment can get
use constant GETSEQCOORDS =><<END;
SELECT fref,
IF(ISNULL(gclass),'Sequence',gclass),
min(fstart),
max(fstop),
fstrand,
gname
FROM fdata,fgroup
WHERE fgroup.gname=?
AND fgroup.gclass=?
AND fgroup.gid=fdata.gid
GROUP BY fref,fstrand,gname
END
;
use constant GETALIASCOORDS =><<END;
SELECT fref,
IF(ISNULL(gclass),'Sequence',gclass),
min(fstart),
max(fstop),
fstrand,
gname
FROM fdata,fgroup,fattribute,fattribute_to_feature
WHERE fattribute_to_feature.fattribute_value=?
AND fgroup.gclass=?
AND fgroup.gid=fdata.gid
AND fattribute.fattribute_name='Alias'
AND fattribute_to_feature.fattribute_id=fattribute.fattribute_id
AND fattribute_to_feature.fid=fdata.fid
GROUP BY fref,fstrand,gname
END
;
use constant GETALIASLIKE =><<END;
SELECT fref,
IF(ISNULL(gclass),'Sequence',gclass),
min(fstart),
max(fstop),
fstrand,
gname
FROM fdata,fgroup,fattribute,fattribute_to_feature
WHERE fattribute_to_feature.fattribute_value LIKE ?
AND fgroup.gclass=?
AND fgroup.gid=fdata.gid
AND fattribute.fattribute_name='Alias'
AND fattribute_to_feature.fattribute_id=fattribute.fattribute_id
AND fattribute_to_feature.fid=fdata.fid
GROUP BY fref,fstrand,gname
END
;
use constant GETFORCEDSEQCOORDS =><<END;
SELECT fref,
IF(ISNULL(gclass),'Sequence',gclass),
min(fstart),
max(fstop),
fstrand
FROM fdata,fgroup
WHERE fgroup.gname=?
AND fgroup.gclass=?
AND fdata.fref=?
AND fgroup.gid=fdata.gid
GROUP BY fref,fstrand
END
;
use constant FULLTEXTSEARCH => <<END;
SELECT distinct gclass,gname,fattribute_value,MATCH(fattribute_value) AGAINST (?) as score,fmethod,fsource
FROM fgroup,fattribute_to_feature,fdata,ftype
WHERE fgroup.gid=fdata.gid
AND fdata.fid=fattribute_to_feature.fid
AND fdata.ftypeid=ftype.ftypeid
AND MATCH(fattribute_value) AGAINST (?)
END
;
=head1 DESCRIPTION
This adaptor implements a specific mysql database schema that is
compatible with Bio::DB::GFF. It inherits from
Bio::DB::GFF::Adaptor::dbi, which itself inherits from Bio::DB::GFF.
The schema uses several tables:
=over 4
=item fdata
This is the feature data table. Its columns are:
-
fid feature ID (integer)
fref reference sequence name (string)
fstart start position relative to reference (integer)
fstop stop position relative to reference (integer)
ftypeid feature type ID (integer)
fscore feature score (float); may be null
fstrand strand; one of "+" or "-"; may be null
fphase phase; one of 0, 1 or 2; may be null
gid group ID (integer)
ftarget_start for similarity features, the target start position (integer)
ftarget_stop for similarity features, the target stop position (integer)
Note that it would be desirable to normalize the reference sequence
name, since there are usually many features that share the same
reference feature. However, in the current schema, query performance
suffers dramatically when this additional join is added.
=item fgroup
This is the group table. There is one row for each group. Columns:
gid the group ID (integer)
gclass the class of the group (string)
gname the name of the group (string)
The group table serves multiple purposes. As you might expect, it is
used to cluster features that logically belong together, such as the
multiple exons of the same transcript. It is also used to assign a
name and class to a singleton feature. Finally, the group table is
used to identify the target of a similarity hit. This is consistent
with the way in which the group field is used in the GFF version 2
format.
The fgroup.gid field joins with the fdata.gid field.
Examples:
mysql> select * from fgroup where gname='sjj_2L52.1';
+-------+-------------+------------+
| gid | gclass | gname |
+-------+-------------+------------+
| 69736 | PCR_product | sjj_2L52.1 |
+-------+-------------+------------+
1 row in set (0.70 sec)
mysql> select fref,fstart,fstop from fdata,fgroup
where gclass='PCR_product' and gname = 'sjj_2L52.1'
and fdata.gid=fgroup.gid;
+---------------+--------+-------+
| fref | fstart | fstop |
+---------------+--------+-------+
| CHROMOSOME_II | 1586 | 2355 |
+---------------+--------+-------+
1 row in set (0.03 sec)
=item ftype
This table contains the feature types, one per row. Columns are:
ftypeid the feature type ID (integer)
fmethod the feature type method name (string)
fsource the feature type source name (string)
The ftype.ftypeid field joins with the fdata.ftypeid field. Example:
mysql> select fref,fstart,fstop,fmethod,fsource from fdata,fgroup,ftype
where gclass='PCR_product'
and gname = 'sjj_2L52.1'
and fdata.gid=fgroup.gid
and fdata.ftypeid=ftype.ftypeid;
+---------------+--------+-------+-------------+-----------+
| fref | fstart | fstop | fmethod | fsource |
+---------------+--------+-------+-------------+-----------+
| CHROMOSOME_II | 1586 | 2355 | PCR_product | GenePairs |
+---------------+--------+-------+-------------+-----------+
1 row in set (0.08 sec)
=item fdna
This table holds the raw DNA of the reference sequences. It has three
columns:
fref reference sequence name (string)
foffset offset of this sequence
fdna the DNA sequence (longblob)
To overcome problems loading large blobs, DNA is automatically
fragmented into multiple segments when loading, and the position of
each segment is stored in foffset. The fragment size is controlled by
the -clump_size argument during initialization.
=item fattribute_to_feature
This table holds "attributes", which are tag/value pairs stuffed into
the GFF line. The first tag/value pair is treated as the group, and
anything else is treated as an attribute (weird, huh?).
CHR_I assembly_tag Finished 2032 2036 . + . Note "Right: cTel33B"
CHR_I assembly_tag Polymorphism 668 668 . + . Note "A->C in cTel33B"
The columns of this table are:
fid feature ID (integer)
fattribute_id ID of the attribute (integer)
fattribute_value text of the attribute (text)
The fdata.fid column joins with fattribute_to_feature.fid.
=item fattribute
This table holds the normalized names of the attributes. Fields are:
fattribute_id ID of the attribute (integer)
fattribute_name Name of the attribute (varchar)
=back
=head2 Data Loading Methods
In addition to implementing the abstract SQL-generating methods of
Bio::DB::GFF::Adaptor::dbi, this module also implements the data
loading functionality of Bio::DB::GFF.
=cut
=head2 new
Title : new
Usage : $db = Bio::DB::GFF->new(@args)
Function: create a new adaptor
Returns : a Bio::DB::GFF object
Args : see below
Status : Public
The new constructor is identical to the "dbi" adaptor's new() method,
except that the prefix "dbi:mysql" is added to the database DSN identifier
automatically if it is not there already.
Argument Description
-------- -----------
-dsn the DBI data source, e.g. 'dbi:mysql:ens0040' or "ens0040"
-user username for authentication
-pass the password for authentication
=cut
#'
sub new {
my $class = shift;
my ($dsn,$other) = rearrange([
[qw(FEATUREDB DB DSN)],
],@_);
$dsn = "dbi:mysql:$dsn" if !ref($dsn) && $dsn !~ /^(?:dbi|DBI):/;
my $self = $class->SUPER::new(-dsn=>$dsn,%$other);
$self;
}
=head2 get_dna
Title : get_dna
Usage : $string = $db->get_dna($name,$start,$stop,$class)
Function: get DNA string
Returns : a string
Args : name, class, start and stop of desired segment
Status : Public
This method performs the low-level fetch of a DNA substring given its
name, class and the desired range. This should probably be moved to
the parent class.
=cut
sub getseqcoords_query {
my $self = shift;
return GETSEQCOORDS ;
}
sub getaliascoords_query{
my $self = shift;
return GETALIASCOORDS ;
}
sub getforcedseqcoords_query{
my $self = shift;
return GETFORCEDSEQCOORDS ;
}
sub getaliaslike_query{
my $self = shift;
return GETALIASLIKE ;
}
# override parent
sub get_abscoords_bkup {
my $self = shift;
my ($name,$class,$refseq) = @_;
my $result = $self->SUPER::get_abscoords(@_);
return $result if $result;
my $sth;
if ($name =~ s/\*/%/g) {
$sth = $self->dbh->do_query(GETALIASLIKE,$name,$class);
} else {
$sth = $self->dbh->do_query(GETALIASCOORDS,$name,$class);
}
my @result;
while (my @row = $sth->fetchrow_array) { push @result,\@row }
$sth->finish;
if (@result == 0) {
$self->error("$name not found in database");
return;
} else {
return \@result;
}
}
sub make_features_select_part {
my $self = shift;
my $options = shift || {};
my $s;
if (my $b = $options->{bin_width}) {
$s = <<END;
fref,
1+$b*floor(fstart/$b) as fstart,
$b*(1+floor(fstart/$b)) as fstop,
IF(ISNULL(fsource),fmethod,concat(fmethod,':',fsource)),'bin',
count(*) as fscore,
'.','.','bin',
IF(ISNULL(fsource),concat(fref,':',fmethod),concat(fref,':',fmethod,':',fsource)),
NULL,NULL,NULL,NULL
END
;
} else {
$s = <<END;
fref,fstart,fstop,fsource,fmethod,fscore,fstrand,fphase,gclass,gname,ftarget_start,ftarget_stop,fdata.fid,fdata.gid
END
;
}
$s .= ",count(fdata.fid)" if $options->{attributes} && keys %{$options->{attributes}}>1;
$s;
}
# IMPORTANT NOTE:
# WHETHER OR NOT THIS WORKS IS CRITICALLY DEPENDENT ON THE RELATIVE MAGNITUDE OF THE
sub make_features_from_part {
my $self = shift;
my $sparse_types = shift;
my $options = shift || {};
my $sparse_groups = $options->{sparse_groups};
my $index = $sparse_groups ? ' USE INDEX(gid)'
: $sparse_types ? ' USE INDEX(ftypeid)'
: '';
return $options->{attributes} ? "fdata${index},ftype,fgroup,fattribute,fattribute_to_feature\n"
: "fdata${index},ftype,fgroup\n";
}
=head2 search_notes
Title : search_notes
Usage : @search_results = $db->search_notes("full text search string",$limit)
Function: Search the notes for a text string, using mysql full-text search
Returns : array of results
Args : full text search string, and an optional row limit
Status : public
This is a mysql-specific method. Given a search string, it performs a
full-text search of the notes table and returns an array of results.
Each row of the returned array is a arrayref containing the following fields:
column 1 A Bio::DB::GFF::Featname object, suitable for passing to segment()
column 2 The text of the note
column 3 A relevance score.
=cut
sub search_notes {
my $self = shift;
my ($search_string,$limit) = @_;
$search_string =~ tr/*?//d;
my $query = FULLTEXTSEARCH;
$query .= " limit $limit" if defined $limit;
my $sth = $self->dbh->do_query($query,$search_string,$search_string);
my @results;
while (my ($class,$name,$note,$relevance,$method,$source) = $sth->fetchrow_array) {
next unless $class && $name; # sorry, ignore NULL objects
$relevance = sprintf("%.2f",$relevance); # trim long floats
my $featname = Bio::DB::GFF::Featname->new($class=>$name);
my $type = Bio::DB::GFF::Typename->new($method,$source);
push @results,[$featname,$note,$relevance,$type];
}
#added result filtering so that this method returns the expected results
#this section of code used to be in GBrowse's do_keyword_search method
my $match_sub = 'sub {';
foreach (split /\s+/,$search_string) {
$match_sub .= "return unless \$_[0] =~ /\Q$_\E/i; ";
}
$match_sub .= "};";
my $match = eval $match_sub;
my @matches = grep { $match->($_->[1]) } @results;
return @matches;
}
################################ loading and initialization ##################################
=head2 schema
Title : schema
Usage : $schema = $db->schema
Function: return the CREATE script for the schema
Returns : a list of CREATE statemetns
Args : none
Status : protected
This method returns a list containing the various CREATE statements
needed to initialize the database tables.
=cut
sub schema {
my $self = shift;
my $dbh = $self->dbh;
my ($version) = $dbh->selectrow_array('select version()');
my ($major, $minor) = split /\./, $version;
$version = "$major.$minor";
my $engine = $version >= 4.1 ? 'ENGINE' : 'TYPE';
my %schema = (
fdata =>{
table=> qq{
create table fdata (
fid int not null auto_increment,
fref varchar(100) not null,
fstart int not null,
fstop int not null,
fbin double precision,
ftypeid int not null,
fscore float,
fstrand enum('+','-'),
fphase enum('0','1','2'),
gid int not null,
ftarget_start int,
ftarget_stop int,
primary key(fid),
unique index(fref,fbin,fstart,fstop,ftypeid,gid),
index(ftypeid),
index(gid)
) $engine=MyISAM
} # fdata table
}, # fdata
fgroup =>{
table=> qq{
create table fgroup (
gid int not null auto_increment,
gclass varchar(100),
gname varchar(100),
primary key(gid),
unique(gclass,gname)
) $engine=MyISAM
}
},
ftype => {
table=> qq{
create table ftype (
ftypeid int not null auto_increment,
fmethod varchar(100) not null,
fsource varchar(100),
primary key(ftypeid),
index(fmethod),
index(fsource),
unique ftype (fmethod,fsource)
) $engine=MyISAM
} #ftype table
}, #ftype
fdna => {
table=> qq{
create table fdna (
fref varchar(100) not null,
foffset int(10) unsigned not null,
fdna longblob,
primary key(fref,foffset)
) $engine=MyISAM
} # fdna table
},#fdna
fmeta => {
table=> qq{
create table fmeta (
fname varchar(255) not null,
fvalue varchar(255) not null,
primary key(fname)
) $engine=MyISAM
} # fmeta table
},#fmeta
fattribute => {
table=> qq{
create table fattribute (
fattribute_id int(10) unsigned not null auto_increment,
fattribute_name varchar(255) not null,
primary key(fattribute_id)
) $engine=MyISAM
} #fattribute table
},#fattribute
fattribute_to_feature => {
table=> qq{
create table fattribute_to_feature (
fid int(10) not null,
fattribute_id int(10) not null,
fattribute_value text,
key(fid,fattribute_id),
key(fattribute_value(48)),
fulltext(fattribute_value)
) $engine=MyISAM
} # fattribute_to_feature table
},# fattribute_to_feature
finterval_stats => {
table=> qq{
create table finterval_stats (
ftypeid integer not null,
fref varchar(100) not null,
fbin integer not null,
fcum_count integer not null,
primary key(ftypeid,fref,fbin)
) $engine=MyISAM
} # finterval_stats table
},# finterval_stats
);
return \%schema;
}
=head2 make_classes_query
Title : make_classes_query
Usage : ($query,@args) = $db->make_classes_query
Function: return query fragment for generating list of reference classes
Returns : a query and args
Args : none
Status : public
=cut
sub make_classes_query {
my $self = shift;
return 'SELECT DISTINCT gclass FROM fgroup WHERE NOT ISNULL(gclass)';
}
=head2 make_meta_set_query
Title : make_meta_set_query
Usage : $sql = $db->make_meta_set_query
Function: return SQL fragment for setting a meta parameter
Returns : SQL fragment
Args : none
Status : public
By default this does nothing; meta parameters are not stored or
retrieved.
=cut
sub make_meta_set_query {
return 'REPLACE INTO fmeta VALUES (?,?)';
}
=head2 setup_load
Title : setup_load
Usage : $db->setup_load
Function: called before load_gff_line()
Returns : void
Args : none
Status : protected
This method performs schema-specific initialization prior to loading a
set of GFF records. It prepares a set of DBI statement handlers to be
used in loading the data.
=cut
sub setup_load {
my $self = shift;
my $dbh = $self->features_db;
if ($self->lock_on_load) {
my @tables = map { "$_ WRITE"} $self->tables;
my $tables = join ', ',@tables;
$dbh->do("LOCK TABLES $tables");
}
# for my $table (qw(fdata)) {
# $dbh->do("alter table $table disable keys");
# }
my $lookup_type = $dbh->prepare_delayed('SELECT ftypeid FROM ftype WHERE fmethod=? AND fsource=?');
my $insert_type = $dbh->prepare_delayed('INSERT INTO ftype (fmethod,fsource) VALUES (?,?)');
my $lookup_group = $dbh->prepare_delayed('SELECT gid FROM fgroup WHERE gname=? AND gclass=?');
my $insert_group = $dbh->prepare_delayed('INSERT INTO fgroup (gname,gclass) VALUES (?,?)');
my $lookup_attribute = $dbh->prepare_delayed('SELECT fattribute_id FROM fattribute WHERE fattribute_name=?');
my $insert_attribute = $dbh->prepare_delayed('INSERT INTO fattribute (fattribute_name) VALUES (?)');
my $insert_attribute_value = $dbh->prepare_delayed('INSERT INTO fattribute_to_feature (fid,fattribute_id,fattribute_value) VALUES (?,?,?)');
my $insert_data = $dbh->prepare_delayed(<<END);
INSERT INTO fdata (fref,fstart,fstop,fbin,ftypeid,fscore,
fstrand,fphase,gid,ftarget_start,ftarget_stop)
VALUES(?,?,?,?,?,?,?,?,?,?,?)
END
;
$self->{load_stuff}{sth}{lookup_ftype} = $lookup_type;
$self->{load_stuff}{sth}{insert_ftype} = $insert_type;
$self->{load_stuff}{sth}{lookup_fgroup} = $lookup_group;
$self->{load_stuff}{sth}{insert_fgroup} = $insert_group;
$self->{load_stuff}{sth}{insert_fdata} = $insert_data;
$self->{load_stuff}{sth}{lookup_fattribute} = $lookup_attribute;
$self->{load_stuff}{sth}{insert_fattribute} = $insert_attribute;
$self->{load_stuff}{sth}{insert_fattribute_value} = $insert_attribute_value;
$self->{load_stuff}{types} = {};
$self->{load_stuff}{groups} = {};
$self->{load_stuff}{counter} = 0;
}
=head2 load_gff_line
Title : load_gff_line
Usage : $db->load_gff_line($fields)
Function: called to load one parsed line of GFF
Returns : true if successfully inserted
Args : hashref containing GFF fields
Status : protected
This method is called once per line of the GFF and passed a series of
parsed data items that are stored into the hashref $fields. The keys are:
ref reference sequence
source annotation source
method annotation method
start annotation start
stop annotation stop
score annotation score (may be undef)
strand annotation strand (may be undef)
phase annotation phase (may be undef)
group_class class of annotation's group (may be undef)
group_name ID of annotation's group (may be undef)
target_start start of target of a similarity hit
target_stop stop of target of a similarity hit
attributes array reference of attributes, each of which is a [tag=>value] array ref
=cut
sub load_gff_line {
my $self = shift;
my $gff = shift;
my $s = $self->{load_stuff};
my $dbh = $self->features_db;
local $dbh->{PrintError} = 0;
defined(my $typeid = $self->get_table_id('ftype', $gff->{method} => $gff->{source})) or return;
defined(my $groupid = $self->get_table_id('fgroup',$gff->{gname} => $gff->{gclass})) or return;
if ($gff->{stop}-$gff->{start}+1 > $self->max_bin) {
warn "$gff->{gclass}:$gff->{gname} is ",$gff->{stop}-$gff->{start}+1,
" bp long, but the maximum indexable feature is set to ",$self->max_bin," bp.\n";
warn "Please set the maxbin value to a length at least as large as the largest feature you wish to store.\n";
warn "\n* You will need to reinitialize the database from scratch.\n";
warn "* With the Perl API you do this using the -max_bin argument to \$db->initialize().\n";
warn "* With the command-line tools you do with this with --maxfeature option.\n";
}
my $bin = bin($gff->{start},$gff->{stop},$self->min_bin);
my $result = $s->{sth}{insert_fdata}->execute($gff->{ref},
$gff->{start},$gff->{stop},$bin,
$typeid,
$gff->{score},$gff->{strand},$gff->{phase},
$groupid,
$gff->{tstart},$gff->{tstop});
warn $dbh->errstr,"\n" && return unless $result;
my $fid = $dbh->{mysql_insertid}
|| $self->get_feature_id($gff->{ref},$gff->{start},$gff->{stop},$typeid,$groupid);
# insert attributes
foreach (@{$gff->{attributes}}) {
defined(my $attribute_id = $self->get_table_id('fattribute',$_->[0])) or return;
$s->{sth}{insert_fattribute_value}->execute($fid,$attribute_id,$_->[1]);
}
if ( (++$s->{counter} % 1000) == 0) {
print STDERR "$s->{counter} records loaded...";
print STDERR -t STDOUT && !$ENV{EMACS} ? "\r" : "\n";
}
$fid;
}
sub finish_load {
my $self = shift;
my $dbh = $self->features_db;
local $dbh->{PrintError} = 0;
# for my $table (qw(fdata)) {
# $dbh->do("alter table $table enable keys");
# }
$self->SUPER::finish_load;
}
sub insert_sequence {
my $self = shift;
my($id,$offset,$seq) = @_;
my $sth = $self->{_insert_sequence}
||= $self->dbh->prepare_delayed('replace into fdna values (?,?,?)');
$sth->execute($id,$offset,$seq) or $self->throw($sth->errstr);
}
=head2 get_table_id
Title : get_table_id
Usage : $integer = $db->get_table_id($table,@ids)
Function: get the ID of a group or type
Returns : an integer ID or undef
Args : none
Status : private
This internal method is called by load_gff_line to look up the integer
ID of an existing feature type or group. The arguments are the name
of the table, and two string identifiers. For feature types, the
identifiers are the method and source. For groups, the identifiers
are group name and class.
This method requires that a statement handler named I<lookup_$table>,
have been created previously by setup_load(). It is here to overcome
deficiencies in mysql's INSERT syntax.
=cut
#'
# get the object ID from a named table
sub get_table_id {
my $self = shift;
my $table = shift;
my @ids = @_;
# irritating warning for null id
my $id_key;
{
local $^W=0;
$id_key = join ':',@ids;
}
my $s = $self->{load_stuff};
my $sth = $s->{sth};
my $dbh = $self->features_db;
unless (defined($s->{$table}{$id_key})) {
#########################################
# retrieval of the last inserted id is now located at the adaptor and not in caching_handle
#######################################
if ( (my $result = $sth->{"lookup_$table"}->execute(@ids)) > 0) {
$s->{$table}{$id_key} = ($sth->{"lookup_$table"}->fetchrow_array)[0];
} else {
$sth->{"insert_$table"}->execute(@ids)
&& ($s->{$table}{$id_key} = $self->insertid($sth->{"insert_$table"}));
#&& ($s->{$table}{$id_key} = $sth->{"insert_$table"}{sth}{mysql_insertid});
#&& ($s->{$table}{$id_key} = $sth->{"insert_$table"}->insertid);
}
}
my $id = $s->{$table}{$id_key};
unless (defined $id) {
warn "No $table id for $id_key ",$dbh->errstr," Record skipped.\n";
return;
}
$id;
}
sub insertid {
my $self = shift;
my $s = shift ;
$s->{mysql_insertid};
}
=head2 get_feature_id
Title : get_feature_id
Usage : $integer = $db->get_feature_id($ref,$start,$stop,$typeid,$groupid)
Function: get the ID of a feature
Returns : an integer ID or undef
Args : none
Status : private
This internal method is called by load_gff_line to look up the integer
ID of an existing feature. It is ony needed when replacing a feature
with new information.
=cut
# this method is called when needed to look up a feature's ID
sub get_feature_id {
my $self = shift;
my ($ref,$start,$stop,$typeid,$groupid) = @_;
my $s = $self->{load_stuff};
unless ($s->{get_feature_id}) {
my $dbh = $self->features_db;
$s->{get_feature_id} =
$dbh->prepare_delayed('SELECT fid FROM fdata WHERE fref=? AND fstart=? AND fstop=? AND ftypeid=? AND gid=?');
}
my $sth = $s->{get_feature_id} or return;
$sth->execute($ref,$start,$stop,$typeid,$groupid) or return;
my ($fid) = $sth->fetchrow_array;
return $fid;
}
sub _add_interval_stats_table {
my $self = shift;
my $schema = $self->schema;
my $create_table_stmt = $schema->{'finterval_stats'}{'table'};
$create_table_stmt =~ s/create table/create table if not exists/i;
my $dbh = $self->features_db;
$dbh->do($create_table_stmt) || warn $dbh->errstr;
}
sub disable_keys {
my $self = shift;
my $table = shift;
my $dbh = $self->dbh;
$dbh->do("alter table $table disable keys");
}
sub enable_keys {
my $self = shift;
my $table = shift;
my $dbh = $self->dbh;
$dbh->do("alter table $table enable keys");
}
1;
__END__
=head1 BUGS
none ;-)
=head1 SEE ALSO
L<Bio::DB::GFF>, L<bioperl>
=head1 AUTHOR
Lincoln Stein E<lt>lstein@cshl.orgE<gt>.
Copyright (c) 2002 Cold Spring Harbor Laboratory.
This library is free software; you can redistribute it and/or modify
it under the same terms as Perl itself.
=cut