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Add foreign key with cascade delete constraints to history tables

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Earlier we did not have any foreign keys for history table. But when we delete a record from the parent
history table the corresponding records in their child tables must also be deleted. This is done with the
introduction of foreign key constraints with on cascade delete.
This commit is contained in:
Ravi Kumar Kempapura Srinivasa 2021-02-15 16:43:23 +01:00 committed by Julian Brost
parent 7c782e3eb8
commit bab2d80ada
2 changed files with 21 additions and 1 deletions
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11
schema/mysql/schema.sql
View file

@ -915,7 +915,9 @@ CREATE TABLE user_notification_history (
notification_history_id binary(16) NOT NULL COMMENT 'UUID notification_history.id',
user_id binary(20) NOT NULL COMMENT 'user.id',
PRIMARY KEY (id)
PRIMARY KEY (id),
CONSTRAINT fk_user_notification_history_notification_history FOREIGN KEY (notification_history_id) REFERENCES notification_history (id) ON DELETE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin ROW_FORMAT=DYNAMIC;
CREATE TABLE state_history (
@ -1049,6 +1051,13 @@ CREATE TABLE history (
PRIMARY KEY (id),
CONSTRAINT fk_history_acknowledgement_history FOREIGN KEY (acknowledgement_history_id) REFERENCES acknowledgement_history (id) ON DELETE CASCADE,
CONSTRAINT fk_history_comment_history FOREIGN KEY (comment_history_id) REFERENCES comment_history (comment_id) ON DELETE CASCADE,
CONSTRAINT fk_history_downtime_history FOREIGN KEY (downtime_history_id) REFERENCES downtime_history (downtime_id) ON DELETE CASCADE,
CONSTRAINT fk_history_flapping_history FOREIGN KEY (flapping_history_id) REFERENCES flapping_history (id) ON DELETE CASCADE,
CONSTRAINT fk_history_notification_history FOREIGN KEY (notification_history_id) REFERENCES notification_history (id) ON DELETE CASCADE,
CONSTRAINT fk_history_state_history FOREIGN KEY (state_history_id) REFERENCES state_history (id) ON DELETE CASCADE,
INDEX idx_history_event_time (event_time) COMMENT 'History filtered/ordered by event_time',
INDEX idx_history_acknowledgement (acknowledgement_history_id),
INDEX idx_history_comment (comment_history_id),

11
schema/mysql/upgrades/1.0.0-rc2.sql
View file

@ -147,3 +147,14 @@ ALTER TABLE service_state
ALTER TABLE user_notification_history
MODIFY id binary(20) NOT NULL COMMENT 'sha1(notification_history_id + user_id)';
ALTER TABLE history
ADD CONSTRAINT fk_history_acknowledgement_history FOREIGN KEY (acknowledgement_history_id) REFERENCES acknowledgement_history (id) ON DELETE CASCADE,
ADD CONSTRAINT fk_history_comment_history FOREIGN KEY (comment_history_id) REFERENCES comment_history (comment_id) ON DELETE CASCADE,
ADD CONSTRAINT fk_history_downtime_history FOREIGN KEY (downtime_history_id) REFERENCES downtime_history (downtime_id) ON DELETE CASCADE,
ADD CONSTRAINT fk_history_flapping_history FOREIGN KEY (flapping_history_id) REFERENCES flapping_history (id) ON DELETE CASCADE,
ADD CONSTRAINT fk_history_notification_history FOREIGN KEY (notification_history_id) REFERENCES notification_history (id) ON DELETE CASCADE,
ADD CONSTRAINT fk_history_state_history FOREIGN KEY (state_history_id) REFERENCES state_history (id) ON DELETE CASCADE;
ALTER TABLE user_notification_history
ADD CONSTRAINT fk_user_notification_history_notification_history FOREIGN KEY (notification_history_id) REFERENCES notification_history (id) ON DELETE CASCADE;