-- create tables

CREATE TABLE messages (
    id bigserial NOT NULL primary key,
    domain text,
    action text,
    class text,
    item text,
    sender text,
    payload jsonb,
    tstamp timestamptz default current_timestamp,
    tsread timestamptz -- to be updated upon reading/processing of message
);

CREATE TABLE responses (
    id bigserial NOT NULL primary key,
    domain text,
    action text,
    class text,
    item text,
    payload jsonb,
    tstamp timestamptz default current_timestamp
);

-- indexes

CREATE INDEX idx_msg ON messages USING btree (domain, action, class, item);
CREATE INDEX idx_msg_item ON messages USING btree (domain, class, item);
--CREATE INDEX idx_msg_action ON messages USING btree (action); -- obsolete

CREATE INDEX idx_resp_item ON responses USING btree (domain, class, item);