Hi, Bailu, There is a function called build_index that works with one column at a time which allows you to specific indexing options.
By the way, the column type category only supports one type of index - this index type can not be changed. Indexing option to this column type is ignored. John On 5/29/13 1:34 PM, Bailu Ding wrote: > Thanks John! When I change the type of the text columns to category, add the > indexing type for each column in the -part.txt, and then run > FastBit.build_indexes(), it works. > > Aside from setting indexing types in the -part.txt and leaving the index > option blank in FastBit.build_indexes(), can I specify the indexing type for > each column with the JNI? > > Cheers, > Bailu > > > ________________________________________ > From: K. John Wu [[email protected]] > Sent: Wednesday, May 29, 2013 1:13 PM > To: FastBit Users > Cc: Bailu Ding > Subject: Re: [FastBit-users] Bug in build indexes with FastBit JNI? > > Hi, Bailu, > > by default FastBit does not index TEXT columns. Furthermore, a TEXT > column can only support index type 'keywords' and you have to > explicitly specify the index option in order for FastBit to build a > keyword index on the column. > > If you intent to treat each row as an atomic unit, then it is better > for you to use the function addCategories instead of addText. > > John > > > On 5/29/13 12:59 PM, Bailu Ding wrote: >> Hi, >> >> I am using FastBit JNI to build indexes. I have a problem when I try >> to build indexes of both integer and text columns. Here is the process >> to reproduce the problem: >> >> = Load an integral column with FastBit.add_longs() and >> FastBit.write_buffer(). >> = Load a text column with FastBitStringWriter.addText() and >> FastBitStringWriter.addStringColumnToMetadata() >> = At this time, the -part.txt is correctly constructed for the two >> columns. >> = Then I run FastBit.build_indexes(). Only the intergral column has an >> index. The -part.txt file now only contains the metadata for the >> intergral column. >> >> Is this the right way to build indexes on a mix of integral and text >> columns? >> >> I paste the code here: >> >> import gov.lbl.fastbit.FastBit; >> import gov.lbl.fastbit.FastBitStringWriter; >> import gov.lbl.fastbit.FastBitStringWriterException; >> >> public class FastBitTest { >> >> public static void main(String args[]) throws >> FastBitStringWriterException >> { >> String[] strArr = {"0", "1", "2", "3"}; >> long[] intArr = {4, 5, 6, 7}; >> String partName = "/path/to/the/data/folder"; >> FastBit fb = new FastBit(null); >> FastBitStringWriter writer = new FastBitStringWriter(); >> >> fb.add_longs("long", intArr); >> fb.write_buffer(partName); >> >> writer.addText(partName, "str", strArr, "UTF-8"); >> writer.addStringColumnToMetadata(partName, "str", "text"); >> >> fb.build_indexes(partName, "basic"); >> } >> } >> >> >> Cheers, >> Bailu >> >> >> >> _______________________________________________ >> FastBit-users mailing list >> [email protected] >> https://hpcrdm.lbl.gov/cgi-bin/mailman/listinfo/fastbit-users >> _______________________________________________ FastBit-users mailing list [email protected] https://hpcrdm.lbl.gov/cgi-bin/mailman/listinfo/fastbit-users
