Can't fetch attributes of custom_conversion_goal and campaign when querying the conversion_goal_campaign_config resource.

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Hi 

I was trying to fetch attributes of custom_conversion_goal and campaign when querying the conversion_goal_campaign_config resource with the below query, but can't see the goal the attributes of conversion_goal_campaign_config and custom_conversion_goal, but I can see the attributes of campaign, id and name. 

Query I tried, 

"SELECT conversion_goal_campaign_config.campaign, conversion_goal_campaign_config.custom_conversion_goal, conversion_goal_campaign_config.goal_config_level, campaign.id, campaign.name, custom_conversion_goal.name, custom_conversion_goal.status, custom_conversion_goal.conversion_actions FROM conversion_goal_campaign_config"