From: Gaudenz S. <ga...@so...> - 2009-05-13 22:42:50
Attachments:
febrl_sql_dataset.patch
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SQL Dataset (febrl_sql_dataset.patch) ************************************* This adds two SQL dataset classes. The first one reads and writes from a single table. The second one which is read only and uses two SQL queries to construct the dataset. The first query retruns al list of keys and the second query is used to fetch the rows of the dataset based on this list of keys. The second class is mainly interesting because it can fetch several values for a single key and for a single column. E.g. the key is a person identifier and you want to have multiple mailadresses as a set in a single row and a single column. As febrl currently does not support lists or sets as data types this is only usefull together with the set comparison feature below. |