DESCRIPTION: Add UDF's to maintain cstore table options
This PR adds two UDF's and a view to interact and maintain the cstore table options.
- ``alter_cstore_table_set(relid REGCLASS, [ options ... ])``
- ``alter_cstore_table_reset(relid REGCLASS, [ options ... ])``
- ``cstore.cstore_options``
The `set` function takes options and their specific types. When specified it will change the option associated with the table to the provided value. When omitted no action is taken.
The `reset` function takes options as booleans. When set to `true` the value of the option associated with the table will be reset to the current default as specified by the associated GUC's.
The options view containes a record for every cstore table with its associated settings as columns.
Nils Dijk