Good catch, Szehon Ho. Yes, the "Newly Created Tables" section of the StatsDev wikidoc needs to be updated, keeping in mind that releases 0.7 though 0.12 have "jdbc:derby" as the default for hive.stats.dbclass so we can't just swap in the new default value. Linking to/from hive.stats.dbclass in the Configuration Properties doc will help with future maintenance.
Also, the HiveConf.java description of hive.stats.dbclass omits the "fs" value. I can correct that in the next patch for
HIVE-6586, perhaps using the wiki description or a variant of it:
The storage that stores temporary Hive statistics. In FS based statistics collection, each task writes statistics it has collected in a file on the filesystem, which will be aggregated after the job has finished. Supported values are fs (filesystem), jdbc(:.*), hbase, counter and custom (
Suggested changes to that description: (1) change "FS" to "filesystem (fs)", (2) remove or move "(
HIVE-6500)" so it doesn't imply that HIVE-6500 added "custom", (3) change "jdbc(:.*)" to "jdbc:<database>" and explain that <database> can be derby, mysql, ... and what others – is there a complete list anywhere?
P.S. What do you mean by "It is actually not linked from the top"? Top of what? Maybe you mean it belongs on the Home page. Currently it's listed on the LanguageManual page, but that's easy to change – we can even list it both places.