   KEY idx1 (id,contig),
   PRIMARY KEY (id),
   KEY id_contig (id,contig),
-  KEY idx2 (id,contig),
-  KEY idx3 (id,contig)
+  KEY idx2 (id,contig)
 );
 
 #
 # Table structure for table 'exon_feature'
 #
-DROP TABLE IF EXISTS exon_feature;
 CREATE TABLE exon_feature (
   feature varchar(40),
   exon varchar(40)

#
# Table structure for table 'transcript'
#
DROP TABLE IF EXISTS transcript;
CREATE TABLE transcript (
  id varchar(40) DEFAULT '' NOT NULL,
  gene varchar(40),

#
# Table structure for table 'dna'
#
CREATE TABLE dna (
  contig varchar(40) DEFAULT '' NOT NULL,
  sequence mediumtext NOT NULL,
  created date DEFAULT '0000-00-00' NOT NULL,
  id int(10) unsigned DEFAULT '0' NOT NULL auto_increment,
  PRIMARY KEY (contig),
  KEY id (id),
  KEY idx1 (id,contig)
);

#
# Table structure for table 'exon'
#
CREATE TABLE exon (
  id varchar(40) DEFAULT '' NOT NULL,
  contig varchar(40) DEFAULT '' NOT NULL,
