# select aa.is_reference, count(1) from gene_direct_xref gdx, gene_stable_id gsi, alt_allele aa where gdx.ensembl_stable_id = gsi.stable_id and gsi.internal_id = aa.gene_id group by aa.is_reference;
my $get_data_sth = $self->xref->dbc->prepare($get_data_sql) || die "Could not prepare $get_data_sql";
# select aa.is_reference, count(1) from transcript_direct_xref tdx, transcript_stable_id tsi, alt_allele aa, gene_transcript_translation gtt where tdx.ensembl_stable_id = tsi.stable_id and tsi.internal_id = gtt.transcript_id and gtt.gene_id = aa.gene_id group by aa.is_reference;
my $insert_object_xref_sql =(<<INO);
INSERT INTO object_xref (object_xref_id, ensembl_id, ensembl_object_type, xref_id, linkage_annotation,