-- Copyright [1999-2015] Wellcome Trust Sanger Institute and the EMBL-European Bioinformatics Institute
-- Copyright [2016-2019] EMBL-European Bioinformatics Institute
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# patch_65_66_c.sql
#
# Title: Reorder an index in unmapped_object.
#
# Description:
# The unique_unmapped_obj_idx index in the unmapped_object table is
# ineffective when querying the table.  Its first part, for example,
# partly overlaps with the id_idx index.  A reordering was suggested by
# the Ensembl Regulation team.

ALTER TABLE unmapped_object
  DROP INDEX unique_unmapped_obj_idx,
  ADD UNIQUE INDEX unique_unmapped_obj_idx
    (ensembl_id, ensembl_object_type, identifier, unmapped_reason_id,
    parent, external_db_id);

# Patch identifier:
INSERT INTO meta (species_id, meta_key, meta_value)
  VALUES (NULL, 'patch', 'patch_65_66_c.sql|reorder_unmapped_obj_index');
