85 lines
3.6 KiB
PL/PgSQL
85 lines
3.6 KiB
PL/PgSQL
-- 元数据只保存结构模具与绑定，不保存任何业务实例值。
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CREATE SCHEMA metadata AUTHORIZATION muse_maint;
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GRANT USAGE ON SCHEMA metadata TO muse_app, muse_eval;
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CREATE TABLE metadata.type_registry (
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type_id text PRIMARY KEY,
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definition jsonb NOT NULL,
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content_hash text NOT NULL,
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state text NOT NULL DEFAULT 'candidate' CHECK (state IN ('candidate', 'published')),
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policy_revision bigint NOT NULL DEFAULT 0 CHECK (policy_revision >= 0)
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);
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CREATE TABLE metadata.schema_version (
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schema_id text NOT NULL,
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schema_version bigint NOT NULL CHECK (schema_version > 0),
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type_id text NOT NULL REFERENCES metadata.type_registry(type_id),
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definition jsonb NOT NULL,
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content_hash text NOT NULL,
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state text NOT NULL CHECK (state IN ('candidate', 'published')),
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PRIMARY KEY (schema_id, schema_version)
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);
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CREATE TABLE metadata.work_extension (
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work_id text NOT NULL,
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schema_id text NOT NULL,
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base_version bigint NOT NULL,
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extension_version bigint NOT NULL CHECK (extension_version > 0),
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definition jsonb NOT NULL,
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content_hash text NOT NULL,
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state text NOT NULL CHECK (state IN ('candidate', 'published')),
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PRIMARY KEY (work_id, schema_id, base_version, extension_version),
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FOREIGN KEY (schema_id, base_version)
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REFERENCES metadata.schema_version(schema_id, schema_version)
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);
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CREATE TABLE metadata.policy_version (
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type_id text NOT NULL REFERENCES metadata.type_registry(type_id),
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version bigint NOT NULL CHECK (version > 0),
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definition jsonb NOT NULL,
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content_hash text NOT NULL,
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PRIMARY KEY (type_id, version)
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);
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CREATE TABLE metadata.schema_binding (
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target_ref text PRIMARY KEY,
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work_id text NOT NULL,
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type_id text NOT NULL REFERENCES metadata.type_registry(type_id),
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schema_id text NOT NULL,
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base_version bigint NOT NULL,
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extension_version bigint,
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effective_schema_hash text NOT NULL,
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revision bigint NOT NULL CHECK (revision > 0),
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FOREIGN KEY (schema_id, base_version)
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REFERENCES metadata.schema_version(schema_id, schema_version),
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FOREIGN KEY (work_id, schema_id, base_version, extension_version)
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REFERENCES metadata.work_extension(work_id, schema_id, base_version, extension_version)
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);
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CREATE TABLE metadata.activation_receipt (
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command_id text PRIMARY KEY,
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request_hash text NOT NULL,
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result jsonb NOT NULL,
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reviewed_by text NOT NULL,
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change_scope text NOT NULL,
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created_at timestamptz NOT NULL DEFAULT current_timestamp
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);
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-- 候选修改也必须产生新版本；发布只允许改变状态，正文定义永远不可原地覆盖。
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CREATE FUNCTION metadata.immutable_definition() RETURNS trigger LANGUAGE plpgsql AS $$
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BEGIN
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IF TG_OP = 'DELETE' THEN
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RAISE EXCEPTION '元数据历史版本不可删除';
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END IF;
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IF NEW.definition IS DISTINCT FROM OLD.definition
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OR NEW.content_hash IS DISTINCT FROM OLD.content_hash THEN
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RAISE EXCEPTION '元数据定义不可修改，必须新增版本';
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END IF;
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RETURN NEW;
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END;
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$$;
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CREATE TRIGGER schema_immutable BEFORE UPDATE OR DELETE ON metadata.schema_version
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FOR EACH ROW EXECUTE FUNCTION metadata.immutable_definition();
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CREATE TRIGGER extension_immutable BEFORE UPDATE OR DELETE ON metadata.work_extension
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FOR EACH ROW EXECUTE FUNCTION metadata.immutable_definition();
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CREATE TRIGGER policy_immutable BEFORE UPDATE OR DELETE ON metadata.policy_version
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FOR EACH ROW EXECUTE FUNCTION metadata.immutable_definition();
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GRANT SELECT, INSERT, UPDATE ON ALL TABLES IN SCHEMA metadata TO muse_app;
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GRANT SELECT ON ALL TABLES IN SCHEMA metadata TO muse_eval;
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