astropy/astropy — pull request #903 by taldcroft (2013-03-24 15:26:04+00:00)
Title: Provide table join method

This PR provides a full-featured join method for the Table class. It includes support for inner, left, right, and outer joins. Metadata are merged as well (see below).

This PR also includes a new module astropy/utils/meta.py which provides functions for merging metadata. This includes a simple recursive merge algorithm which is tested. Some hooks are available for adjusting the merge rules, but this is preliminary and not well tested.

Still to do:

- Raise exception if there are missing data in key columns