Great. Thanks much On Thursday, July 2, 2015, Ted Dunning <ted.dunn...@gmail.com> wrote:
> Hey Larry, > > Drill transforms your CSV data into an internal memory-resident format for > processing, but does not change the structure of your original data. > > If you want to convert your file to parquet, you can do this: > > create table `foo.parquet` as select * from `foo.csv` > > > This will, however, not leave you with interesting column names. You can > add names inside the select or by putting a parenthesized list of fields > after the word 'table'. Often you will want to add casts in the select to > indicate what type of data you want to use. > > > > > On Thu, Jul 2, 2015 at 12:48 PM, Larry White <ljw1...@gmail.com > <javascript:;>> wrote: > > > hi, > > > > i'm using drill to provide a query-able wrapper around some csv files. > when > > i load a csv datasource, is the data transformed in someway (beyond what > > Calcite does) to improve performance? Specifically, is it transformed > into > > column format? re-written as parquet, or otherwise optimized? > > > > thanks. > > > > larry > > >
