Hi, Yun: Take a look at HBASE-5416 (Improve performance of scans with some kind of filters) which is in 0.94.5 release.
In your case, you can use a filter which specifies column C as the essential family. Here I interpret column C as column family. Cheers On Sat, Mar 9, 2013 at 11:11 AM, yun peng <[email protected]> wrote: > Hi, All, > I want to find all existing values for a given column in a HBase, and would > that result in a full-table scan in HBase? For example, given a column C, > the table is of very large number of rows, from which few rows (say only 1 > row) have non-empty values for column C. Would HBase still ues a full table > scan to find this row? Or HBase has any optimization work for this kind of > query? > Thanks... > Regards > Yun >
