-- 为统一审计跨视角查询补充受控 B-tree 索引，不增加 JSONB 搜索、缓存或分区。
CREATE INDEX idx_audit_event_action_occurred
    ON tb_audit_event (action_code, occurred_at DESC, id DESC);

CREATE INDEX idx_audit_event_result_occurred
    ON tb_audit_event (result, occurred_at DESC, id DESC);

CREATE INDEX idx_audit_event_risk_occurred
    ON tb_audit_event (risk_level, occurred_at DESC, id DESC);

CREATE INDEX idx_audit_event_category_occurred
    ON tb_audit_event (category, occurred_at DESC, id DESC);

CREATE INDEX idx_audit_event_source_occurred
    ON tb_audit_event (source, occurred_at DESC, id DESC);

DROP INDEX idx_audit_event_request;
CREATE INDEX idx_audit_event_request
    ON tb_audit_event (request_id, occurred_at DESC, id DESC)
    WHERE request_id <> '';

DROP INDEX idx_audit_event_parent;
CREATE INDEX idx_audit_event_parent
    ON tb_audit_event (parent_event_id, occurred_at DESC, id DESC)
    WHERE parent_event_id <> '';

CREATE INDEX idx_audit_resource_id_event
    ON tb_audit_event_resource (resource_type, resource_id, audit_event_id)
    WHERE resource_id IS NOT NULL;

CREATE INDEX idx_audit_resource_key_event
    ON tb_audit_event_resource (resource_type, resource_key, audit_event_id);