Maciej 'mac' Grzybek

``` Bug Fixes ———— * Fix explain plan for tables partitioned on timestamp column * Fix execution of several window functions on array and map types Some window functions taking...

Seems like there are some code style failures. Can you reformat the code using code style defined in https://github.com/airlift/codestyle ?

_from optimizer_ is not necessary in commit msg. What about _Add remove identity casts rewriter_? Commit msgs guidelines: http://chris.beams.io/posts/git-commit/

Back to you, @zachyee.

How many tables you have in your Hive setup? Do you have any non-ascii chars in table names maybe? Can you provide a Hive setup to reproduce the problem? E.g....

What's your caching policy (`hive.metastore-cache-ttl` in `catalog/hive.properties`)? This could help with reducing the load on subsequent queries, however with your setup of 200k tables and 1k schemas query like `......

Default value for `metastore-cache-ttl` is 1 hour which should be sufficiently long for you. The general idea behind this property is to avoid subsequent queries to the metastore. Instead, the...