schema initialisation

migrations/20240727123308_initial.sql

@@ -0,0 +1,69 @@
+-- +goose Up
+-- +goose StatementBegin
+CREATE TABLE IF NOT EXISTS tests
+(
+    id          serial               NOT NULL,
+    problem_id  INT                  NOT NULL,
+
+    PRIMARY KEY (id),
+);
+
+CREATE INDEX ON users USING B-TREE (id);
+CREATE INDEX ON users USING B-TREE (problem_id);
+
+
+
+
+CREATE TABLE IF NOT EXISTS languages
+(
+    id                 serial               NOT NULL,
+    name               VARCHAR(60)          NOT NULL,
+    build_file_hash    CHAR(128)            NOT NULL,
+    execute_file_hash  CHAR(128)            NOT NULL,
+    created_at         TIMESTAMPTZ          NOT NULL DEFAULT NOW(),
+    updated_at         TIMESTAMPTZ          NOT NULL DEFAULT NOW(),
+
+    PRIMARY KEY (id),
+);
+
+
+CREATE FUNCTION lng_upd_trg_fn() RETURNS TRIGGER
+    LANGUAGE plpgsql AS
+$$
+BEGIN
+    NEW.updated_at = NOW();
+    RETURN NEW;
+END;
+$$;
+
+CREATE TRIGGER lng_upd_trg
+    BEFORE UPDATE
+    ON languages
+    FOR EACH ROW
+EXECUTE PROCEDURE lng_upd_trg_fn();
+
+
+
+CREATE TABLE IF NOT EXISTS solutions
+(
+    id            serial               NOT NULL,
+    user_id       INT                  REFERENCES users ON DELETE CASCADE,
+    problem_id    INT                  REFERENCES problems ON DELETE CASCADE,
+    language_id   INT                  REFERENCES languages ON DELETE CASCADE,
+    contest_id    INT                  NOT NULL,
+    solution_hash CHAR(128)            NOT NULL,
+    created_at    TIMESTAMPTZ          NOT NULL DEFAULT NOW(),
+
+    PRIMARY KEY (id),
+    CHECK (length(name) != 0),
+    CHECK (length(description) != 0)
+);
+
+CREATE INDEX ON users USING B-TREE (id);
+CREATE INDEX ON users USING B-TREE (id,user_id,problem_id,language_id);
+
+-- +goose StatementEnd
+
+-- +goose Down
+DROP TABLE IF EXISTS tests;
+DROP TABLE IF EXISTS solutions;