Reset state on SkipScanFilter at start of intersect
Optimize ROUND and TRUNC key range
Presplit a salted table if split points are not specified.
Fix bugs in pre-spliting.
Disable group by row key optimization if table is salted
Test for select pk column with group by on a salted table.
Merge pull request #196 from tonyhuang/presplit

Presplit a salted table if split points are not specified.