 	ancestral_allele text,
 
 	primary key( variation_id ),
-	unique ( name )
+	unique ( name ),
+	key source_idx (source_id)
 );
 
 

INSERT INTO failed_description (failed_description_id,description) VALUES (2,'Reference allele not present in the alleles of the variation');
INSERT INTO failed_description (failed_description_id,description) VALUES (3,'Variation containing more than 3 alleles');
INSERT INTO failed_description (failed_description_id,description) VALUES (4,'Variation with \'NoVariation\' alleles');


  primary key(variation_synonym_id),
  key variation_idx (variation_id),
  unique (name, source_id),
  key source_idx (source_id)
);


