naming of functions

[nicholasjhorton]

If I'm understanding things correctly there are:

etl()
etl_create()
etl_update()
etl_extract(), and
etl_cleanup()

functions in the etl framework. Might it make sense to change etl() to etl_init() and etl_create() to etl_populate()? The others feel more self explanatory (but "etl()" by itself doesn't make sense).

[beanumber]

There is also etl_transform and etl_load.

etl is the constructor. @hadley likes constructors, so I am inclined to keep that.

The four main functions in the pipeline are:

etl_extract()
etl_transform()
etl_load()
etl_cleanup()

The two functions etl_create and etl_update are just wrappers to that pipeline. @cpsievert also favors junking the wrapping functions. I'm happy to consider re-naming either, but etl_populate sounds more like a replacement for etl_load than etl_create.