(1) I have uploaded the genome fasta and GFF annotation in the mysql data using following command of `Bio::DB::SeqFeature::Store` database

    ./bp_seqfeature_load.pl -c -d WS240 -u xxx -p xxx c_elegans.PRJNA13758.WS240.genomic.fa c_elegans.PRJNA13758.WS240.annotations.gff3

(2) Following tables are inserted into my database WS240

```
+-----------------+
| Tables_in_WS240 |
+-----------------+
| attribute       |
| attributelist   |
| feature         |
| locationlist    |
| meta            |
| name            |
| parent2child    |
| sequence        |
| typelist        |
+-----------------+
```

(3) Now I want to make query in the mysql to extract the sequence and its feature using following commands:

```
#!/usr/bin/perl
use strict;

use Bio::DB::GFF;
my $db  = Bio::DB::GFF->new(-dsn   => 'dbi:mysql:database=WS240',
                             -user => 'XXX',
                             -pass => 'XXX',
                             -aggregators => 'gene_model{coding_exon,5_UTR,3_UTR/CDS}');

my $gene_stream = $db->get_seq_stream('gene_model:curated');

while (my $gene = $gene_stream->next_seq) {
        print $gene->name,"\n";
        for my $part ($gene->get_SeqFeatures) {
            print "\t",join("\t",$part->method,$part->start,$part->end),"\n";
        }
        print "\n";
}
```

(4) I am getting following error:

```
------------- EXCEPTION: Bio::Root::Exception -------------
MSG: Couldn't execute query SELECT  fref,fstart,fstop,fsource,fmethod,fscore,fstrand,fphase,gclass,gname,ftarget_start,ftarget_stop,fdata.fid,fdata.gid
 FROM fdata,ftype,fgroup
 WHERE   fgroup.gid = fdata.gid
  AND ftype.ftypeid = fdata.ftypeid
 AND  ((fmethod = ? AND fsource = ?) OR (fmethod = ? AND fsource = ?) OR (fmethod = ? AND fsource = ?) OR (fmethod = ? AND fsource = ?))
 ORDER BY fgroup.gname:
 Table 'WS240.fdata' doesn't exist

STACK: Error::throw
STACK: Bio::Root::Root::throw /usr/local/share/perl/5.10.0/Bio/Root/Root.pm:368
STACK: Bio::DB::GFF::Adaptor::dbi::caching_handle::do_query /usr/local/share/perl/5.10.0/Bio/DB/GFF/Adaptor/dbi/caching_handle.pm:123
STACK: Bio::DB::GFF::Adaptor::dbi::range_query /usr/local/share/perl/5.10.0/Bio/DB/GFF/Adaptor/dbi.pm:627
STACK: Bio::DB::GFF::Adaptor::dbi::get_features_iterator /usr/local/share/perl/5.10.0/Bio/DB/GFF/Adaptor/dbi.pm:1008
STACK: Bio::DB::GFF::_features /usr/local/share/perl/5.10.0/Bio/DB/GFF.pm:3476
STACK: Bio::DB::GFF::features /usr/local/share/perl/5.10.0/Bio/DB/GFF.pm:1091
STACK: Bio::DB::GFF::get_seq_stream /usr/local/share/perl/5.10.0/Bio/DB/GFF.pm:1132
STACK: ./aa.pl:12
```

(5) Could you kindly suggest me what is wrong with the script (3), what is the best approach to make query with mysql. I also used the `bp_bulk_load_gff.pl` ([Bio::DB::GFF][1])</a>) to upload the GFF file into mysql but not working well.

Thanks  
Firoz

 [1]: http://wiki.wormbase.org/index.php/Mining_WormBase_with_Bio::DB::GFF
See this thread and the answer by Timothy Parnell: http://generic-model-organism-system-database.450254.n5.nabble.com/Getting-gbrowse-syn-to-work-with-MySQL-td5519255.html

You should use `bp_bulk_load_gff.pl` with `Bio::DB::GFF` and `bp_seqfeature_load.pl` with `Bio::DB::SeqFeature::Store`. However your script uses `Bio::DB::GFF` with `bp_seqfeature_load.pl`. You need to change one of them to conform.