CREATE TABLE IF NOT EXISTS sharedchannels (
    channelid character varying(26) NOT NULL,
    teamid character varying(26),
    home boolean,
    readonly boolean,
    sharename character varying(64),
    sharedisplayname character varying(64),
    sharepurpose character varying(250),
    shareheader character varying(1024),
    creatorid character varying(26),
    createat bigint,
    updateat bigint,
    remoteid character varying(26),
    PRIMARY KEY (channelid),
    UNIQUE (sharename, teamid)
);