text: -- Copyright [1999-2015] Wellcome Trust Sanger Institute and the EMBL-European Bioinformatics Institute
  -- Copyright [2016-2021] EMBL-European Bioinformatics Institute
  -- 
  -- Licensed under the Apache License, Version 2.0 (the "License");
  -- you may not use this file except in compliance with the License.
  -- You may obtain a copy of the License at
  -- 
  --      http://www.apache.org/licenses/LICENSE-2.0
  -- 
  -- Unless required by applicable law or agreed to in writing, software
  -- distributed under the License is distributed on an "AS IS" BASIS,
  -- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  -- See the License for the specific language governing permissions and
  -- limitations under the License.
  
  # patch_74_75_e.sql
  #
  # title: Add unique constraint on attrib tables
  #
  # description:
  # For all attrib related tables, attrib_type_id and value should be unique for a given object
  
  ALTER TABLE seq_region_attrib ADD UNIQUE KEY region_attribx (seq_region_id, attrib_type_id, value(500));
  ALTER TABLE gene_attrib ADD UNIQUE KEY gene_attribx (gene_id, attrib_type_id, value(500));
  ALTER TABLE transcript_attrib ADD UNIQUE KEY transcript_attribx (transcript_id, attrib_type_id, value(500));
  ALTER TABLE translation_attrib ADD UNIQUE KEY translation_attribx (translation_id, attrib_type_id, value(500));
  ALTER TABLE misc_attrib ADD UNIQUE KEY misc_attribx (misc_feature_id, attrib_type_id, value(500));
  
  
  # patch identifier
  INSERT INTO meta (species_id, meta_key, meta_value) VALUES (NULL, 'patch', 'patch_74_75_e.sql|unique_attrib_key');
  
   
  