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SQL: Add ON DELETE clause to foreign keys

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This makes it easier to remove a complete package or system when
debugging.
This commit is contained in:
Yorhel 2016-10-06 09:52:18 +02:00
parent 488b88c3cf
commit d2d48920f4
2 changed files with 6 additions and 3 deletions
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6
sql/schema.sql
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@ -13,7 +13,7 @@ CREATE TABLE contents (
CREATE TABLE packages (
id SERIAL PRIMARY KEY,
system integer NOT NULL REFERENCES systems(id),
system integer NOT NULL REFERENCES systems(id) ON DELETE CASCADE,
category varchar,
name varchar NOT NULL,
UNIQUE(system, name, category) -- Note the order, lookups on (system,name) are common
@ -21,14 +21,14 @@ CREATE TABLE packages (
CREATE TABLE package_versions (
id SERIAL PRIMARY KEY,
package integer NOT NULL REFERENCES packages(id),
package integer NOT NULL REFERENCES packages(id) ON DELETE CASCADE,
version varchar NOT NULL,
released date NOT NULL,
UNIQUE(package, version)
);
CREATE TABLE man (
package integer NOT NULL REFERENCES package_versions(id),
package integer NOT NULL REFERENCES package_versions(id) ON DELETE CASCADE,
name varchar NOT NULL,
section varchar NOT NULL,
filename varchar NOT NULL,

3
sql/update-2016-10-06.sql Normal file
View file

@ -0,0 +1,3 @@
ALTER TABLE packages DROP CONSTRAINT packages_system_fkey, ADD CONSTRAINT packages_system_fkey FOREIGN KEY(system) REFERENCES systems(id) ON DELETE CASCADE;
ALTER TABLE package_versions DROP CONSTRAINT package_versions_package_fkey, ADD CONSTRAINT package_versions_package_fkey FOREIGN KEY(package) REFERENCES packages(id) ON DELETE CASCADE;
ALTER TABLE man DROP CONSTRAINT man_package_fkey, ADD CONSTRAINT man_package_fkey FOREIGN KEY(package) REFERENCES package_versions(id) ON DELETE CASCADE;