write smart_{etl} helper functions

beanumber / etl

R package to facilitate ETL operations

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Open beanumber opened 8 years ago

beanumber commented 7 years ago

write etl_filenames() that takes a params list and generates the corresponding filenames for each phase
1-1 mapping between remote and local files for etl_extract()
no rules for etl_transform()
1-1 mapping between CSV files and DB tables in etl_load()