instanceof Slice is always false. removed superfluous code snippet
removed unnecessary unboxing
Added documentation for color functions.
Adding missing functions to documentation
Adding logical and comparison operators to the documentation
Use catalog and use schema
Implement distinct limit operator
Ignore hidden files/directories in AsyncRecursiveWalker
Add Node and NodeManager to SPI
Do not distribute create table plan when in single node mode
TPCH plugin
Convert benchmarks to use CREATE TABLE for data loading
Add support for tables with sampled data
Optimizations for sampled data

* Run aggregates directly on sampled data
* Pull materialization up through JOINs and UNIONs
Add more optimizations for sampled tables

Pull materialization up through:
* filter
* project
* top N
* sort
* limit
* semi join
* mark distinct
Move table creation into DistributedLogicalPlanner
Add support for writing sampled tables

* Add method to connector SPI to indicate if the connector supports storing sampled data
* Implement storing sampled data in the native store
* Add benchmarks for queries over sampled data

Benchmarks show that the materialization optimizer makes queries on sampled data (with a weight of 2) 118% to 682% faster

Benchmarks without optimizer:
sampled_sql_groupby_agg_with_arithmetic  :: 3739.602 cpu ms :: in    6M,   189MB,    1.6M/s,  50.5MB/s :: out     2,     30B,       0/s,      8B/s
sampled_sql_count_agg                    ::   28.461 cpu ms :: in  1.5M,  12.9MB,   52.7M/s,   452MB/s :: out     1,      9B,      35/s,    316B/s
sampled_sql_join_with_predicate          :: 2371.573 cpu ms :: in  7.5M,   180MB,   3.16M/s,    76MB/s :: out     1,      9B,       0/s,      3B/s
sampled_sql_double_sum_agg               ::  180.579 cpu ms :: in  1.5M,  25.7MB,   8.31M/s,   143MB/s :: out     1,      9B,       5/s,     49B/s

Benchmarks with optimizer:
sampled_sql_groupby_agg_with_arithmetic  :: 1008.255 cpu ms :: in    6M,   189MB,   5.95M/s,   187MB/s :: out     2,     30B,       1/s,     29B/s
sampled_sql_count_agg                    ::   12.934 cpu ms :: in  1.5M,  12.9MB,    116M/s,   995MB/s :: out     1,      9B,      77/s,    695B/s
sampled_sql_join_with_predicate          :: 1005.354 cpu ms :: in  7.5M,   180MB,   7.46M/s,   179MB/s :: out     1,      9B,       0/s,      8B/s
sampled_sql_double_sum_agg               ::   22.906 cpu ms :: in  1.5M,  25.7MB,   65.5M/s,   1.1GB/s :: out     1,      9B,      43/s,    392B/s