text: -- Copyright [1999-2015] Wellcome Trust Sanger Institute and the EMBL-European Bioinformatics Institute
  -- Copyright [2016-2019] 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_50_51_i.sql
  #
  # title: Meta value binary
  #
  # description:
  # Add BINARY flag to meta.meta_value to make it case sensitive when doing UNIQUE comparisions (especially for Gallus/gallus)
  
  # Drop UNIQUE index first
  ALTER TABLE meta DROP INDEX species_key_value_idx;
  
  ALTER TABLE meta CHANGE COLUMN meta_value meta_value VARCHAR(255) BINARY NOT NULL;
  
  # Redo index
  ALTER TABLE meta ADD UNIQUE INDEX species_key_value_idx (species_id, meta_key, meta_value);
  
  # patch identifier
  INSERT INTO meta (species_id, meta_key, meta_value) VALUES (NULL, 'patch', 'patch_50_51_i.sql|meta_value_binary');
  
  
  