On 3/27/12 2:20 AM, Alvaro Tejero Cantero wrote: >>> (but how to grow it in columns without deleting& recreating?) >> You can't (at least on cheap way). Maybe you may want to create >> additional tables and grouping them in terms of the columns you are >> going to need for your queries. > Sorry, it is not clear to me: create new tables and (grouping = > grouping in HDF5 Groups) them in terms of the columns? > As far as I understood, only columns in the same table (regardless the > group of the table) can be queried together with the in-kernel engine?
Yes, but the idea is to get rid of this limitation for querying columns in the same table (which is somewhat artificial). In fact, now that I think about this, you can actually implement queries on different unidimensional arrays (think of them as independent columns) by using the `tables.Expr` class. More on this later. -- Francesc Alted ------------------------------------------------------------------------------ This SF email is sponsosred by: Try Windows Azure free for 90 days Click Here http://p.sf.net/sfu/sfd2d-msazure _______________________________________________ Pytables-users mailing list Pytables-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/pytables-users
