Cassandra query returns no rows from apprepo.apiproxy_revisions

(Apigee Edge version 4.18.05)

Using cqslh to

select * from apprepo.apiproxy_revisions;

returns

 key | column1 | value
-----+---------+------- 
(0 rows)

However, several deployed api proxy revisions exist, so I did expect to see some rows returned?

select count(*) from apprepo.apiproxies;

returns:

 count
-------
     5

(1 rows)

So the query is indeed retrieving some data from Cassandra?

Is there any documentation/hints on which Cassandra tables are used for what purpose; in the Apigee doc on JMX monitoring, it is suggested that exactly apprepo.apiproxy_revisions could be monitored (see Apigee JMX monitoring)?

Also, querying Zookeeper confirms that api proxies indeed exist in several revisions, and also has been deployed.

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