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-- Copyright [2016-2019] EMBL-European Bioinformatics Institute
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# patch_09022018_f.sql
#
# Title: Adding delete cascade for genome_database_id in genome_alignment, genome_annotation and genome_feature
#
# Description: Adding delete cascade for genome_database_id in genome_alignment and genome_feature.
# This is to make sure that when we delete a database from genome_database, associated annotation get removed too

ALTER TABLE genome_alignment ADD CONSTRAINT genome_alignment_ibfk_2 FOREIGN KEY (genome_database_id) REFERENCES genome_database (genome_database_id) ON DELETE CASCADE;
ALTER TABLE genome_feature ADD CONSTRAINT genome_feature_ibfk_2 FOREIGN KEY (genome_database_id) REFERENCES genome_database (genome_database_id) ON DELETE CASCADE;
ALTER TABLE genome_annotation ADD CONSTRAINT genome_annotation_ibfk_2 FOREIGN KEY (genome_database_id) REFERENCES genome_database (genome_database_id) ON DELETE CASCADE;
