ch6

migrations/000001_create_movies_table.down.sql

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+DROP TABLE IF EXISTS movies;

migrations/000001_create_movies_table.up.sql

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+CREATE TABLE IF NOT EXISTS movies (
+    id bigserial PRIMARY KEY,
+    created_at timestamp(0) with time zone NOT NULL DEFAULT NOW(),
+    title text NOT NULL,
+    year integer NOT NULL,
+    runtime integer NOT NULL,
+    genres text[] NOT NULL,
+    version integer NOT NULL DEFAULT 1
+);

migrations/000002_add_movies_check_constraints.down.sql

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+ALTER TABLE movies DROP CONSTRAINT IF EXISTS movies_runtime_check;
+
+ALTER TABLE movies DROP CONSTRAINT IF EXISTS movies_year_check;
+
+ALTER TABLE movies DROP CONSTRAINT IF EXISTS genres_length_check;

migrations/000002_add_movies_check_constraints.up.sql

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+ALTER TABLE movies ADD CONSTRAINT movies_runtime_check CHECK (runtime >= 0);
+
+ALTER TABLE movies ADD CONSTRAINT movies_year_check CHECK (year BETWEEN 1888 AND date_part('year', now()));
+
+ALTER TABLE movies ADD CONSTRAINT genres_length_check CHECK (array_length(genres, 1) BETWEEN 1 AND 5);