Hi, (first of all thank you for creating such a useful tool!!)
I am an absolute beginner to FastBit; I am playing with fastbit to get an initial understanding. I am noticing something weird which I cannot seem to understand: When I use ardea to load a csv file into fastbit's columnar format, I sometimes see a .msk file being created for the last column. I cannot understand why is this file being created only for last column. Reading the help pages, it appears that this file will be created for columns having 'null' values but the file I'm trying to load definitely does not have 'null' values. The file has just 5 rows and 3 columns. Here is the console output of what I'm doing- (any insight will be greatly appreciated) -------------------------------------------- Gauravs-MacBook-Pro:tests gaurav$ cat test.csv 1,a,p 2,b,q 3,c,r 4,d,s 5,e,t Gauravs-MacBook-Pro:tests gaurav$ ardea -d tmp -m "a:int, b:text, c:text" -t test.csv ardea: verbose level 0 Will attempt to parse 1 CSV file test.csv with the following column names and types a:int, b:text, c:text ardea to read CSV file test.csv ... ardea read 5 rows from test.csv Gauravs-MacBook-Pro:tests gaurav$ ls tmp/ -part.txt a b c c.msk Gauravs-MacBook-Pro:tests gaurav$ cat tmp/-part.txt # meta data for data partition tmp written by ibis::tafel::write on Mon Jul 2 23:07:16 2012 BEGIN HEADER Name = tmp Description = ardea -d tmp -m a:int, b:text, c:text -t test.csv Number_of_rows = 5 Number_of_columns = 3 Timestamp = 1341250636 END HEADER Begin Column name = a data_type = INT End Column Begin Column name = b data_type = TEXT index=none End Column Begin Column name = c data_type = TEXT index=none End Column cheers, gaurav
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