Minor fixes: typos, variable names, add comments
Simplify block and cursor implementations by adding some helper methods
Only materialize type in RunLengthEncoder when value changes
Change VARCHAR field type to VarcharType
Fix isFull calculations in BlockBuilders and BlockBuilderStatus
Remove unnecessary types field from SqlStageExecution
Only allow getLong in GroupByIdBlock
Switch to Slice murmur3 for hashes

Minor cleanups in hashes
Simplify size delta calculation in TopNOperator
Remove references to FIXED_INT_64 and VARIABLE_BINARY in messages
Move all coersion logic to FunctionRegistry
Remove unused hashSupplierClass field from JoinOperatorCacheKey
Fix timestamp type in hive connector