{
    "email_template": {
        "column": {
            "store_id": true,
            "is_mt_email": true,
            "direction": true,
            "locale": true,
            "template_plain_text": true
        }
    },
    "mt_email_var": {
        "column": {
            "entity_id": true,
            "hash": true,
            "template_id": true,
            "store_id": true,
            "block_id": true,
            "block_name": true,
            "var_key": true,
            "var_value": true,
            "global": true,
            "is_system_config": true,
            "is_default": true,
            "template_code": true,
            "tmp": true
        },
        "index": {
            "MT_EMAIL_VAR_HASH": true,
            "MT_EMAIL_VAR_TEMPLATE_ID": true,
            "MT_EMAIL_VAR_STORE_ID": true
        },
        "constraint": {
            "PRIMARY": true,
            "MT_EMAIL_VAR_TEMPLATE_ID_BLOCK_ID_VAR_KEY_STORE_ID": true
        }
    }
}