Add condition pushdowns to the information_schema tables to give a
performance improvement when a relevant WHERE condition is provided. In
addition there is a new table_usage() stored procedure designed to use
the pushdowns.
This does the following:
* Switch resource manager to a singleton which reduces the amount of
times the XML data is scanned and objects allocated.
* Make the I_S tables use the FE implementation of the system catalog
* Make the I_S.columnstore_columns table use the RID list cache
* Make the extentmap pre-allocate a vector instead of many small allocs
Fixes the following:
* Compression ratio calculation was incorrect
* Possible issues due to system catalog thread ID usage
* Compressed file size data count was leaking many FDs when the table
wasn't compressed
* Compressed file size data count was allocating random large amounts
of RAM and then leaking it when the table wasn't compressed
This patch does the following:
* Fix a year storage issue in the datestamp for the columnstore tables
metadata table (note that any previous tables will still have the
incorrect year stored).
* Expose the table creation date in CalpontSystemCatalog::getTables()
* Add an INFORMATION_SCHEMA table listing the tables in ColumnStore
(similar to systable)
* Add an INFORMATION_SCHEMA table listing the columns in ColumnStore
(similar to syscolumn)
* Add an INFORMATION_SCHEMA table listing the extents in ColumnStore
(similar to the editem tool but with additional file information)
* Modifies the build system and scripts to support the new tables
