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Anoop Sam John commented on HBASE-5664: --------------------------------------- Previously seeking was not possible on the RegionScanner. Now with HBASE-5520 CP can do a fast forward with reseek() on RegionScanner. Use case of this new hook > CP hooks in Scan flow for fast forward when filter filters out a row > -------------------------------------------------------------------- > > Key: HBASE-5664 > URL: https://issues.apache.org/jira/browse/HBASE-5664 > Project: HBase > Issue Type: Improvement > Components: coprocessors > Affects Versions: 0.92.1 > Reporter: Anoop Sam John > Assignee: Anoop Sam John > Fix For: 0.96.0 > > > In HRegion.nextInternal(int limit, String metric) > We have while(true) loop so as to fetch a next result which satisfies > filter condition. When Filter filters out the current fetched row we call > nextRow(byte [] currentRow) before going with the next row. > {code} > if (results.isEmpty() || filterRow()) { > // this seems like a redundant step - we already consumed the row > // there're no left overs. > // the reasons for calling this method are: > // 1. reset the filters. > // 2. provide a hook to fast forward the row (used by subclasses) > nextRow(currentRow); > {code} > // 2. provide a hook to fast forward the row (used by subclasses) > We can provide same feature of fast forward support for the CP also. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa For more information on JIRA, see: http://www.atlassian.com/software/jira