Server Audit Mystery 2: Filtering action_id gets Error Msg 25713

Server Audits allow filtering on certain fields. Two fields claim to be strings, yet don't accept strings for filters. Here's how I figured out filtering on action_id (i.e. the event) :-)

Server Audit Mystery 1: Filtering class_type gets Error Msg 25713

Server Audits allow filtering on certain fields. Two fields claim to be strings, yet don't accept strings for filters. Here's how I figured out filtering on class_type (i.e. object type) :-)