Feature/header

[ameier38]

Change Summary

• add header option

UNLOAD ('select-statement')
TO 's3://object-path/name-prefix'
authorization
[ option [ ... ] ]

where option is

{ MANIFEST [ VERBOSE ] 
| HEADER                                                      <<<<<
| DELIMITER [ AS ] 'delimiter-char' 
| FIXEDWIDTH [ AS ] 'fixedwidth-spec' }  
| ENCRYPTED
| BZIP2  
| GZIP     
| ADDQUOTES 
| NULL [ AS ] 'null-string'
| ESCAPE
| ALLOWOVERWRITE
| PARALLEL [ { ON | TRUE } | { OFF | FALSE } ]
| MAXFILESIZE [AS] max-size [ MB | GB ] ]
| REGION [AS] 'aws-region'

• fix unload_location parameter

Todos

• MIT compatible
• Tests
• Documentation
• Updated CHANGES.rst

[jklukas]

The structure here looks good. Left a few comments on things to fix up.

If you address those fixes and add an entry to the CHANGES file, this looks good to me.

cc @graingert

[ameier38]

@jklukas thanks for the quick review 👍

Updated the PR based on your comments. Let me know if you would like any other changes.

[jklukas]

If you accept the CHANGES change, I'll go ahead and merge this.

[jklukas]

Released in https://pypi.org/project/sqlalchemy-redshift/0.7.2/