Feng Honghua created HBASE-10252: ------------------------------------ Summary: Don't write back to WAL/memstore when Increment amount is zero (mostly for query rather than update intention) Key: HBASE-10252 URL: https://issues.apache.org/jira/browse/HBASE-10252 Project: HBase Issue Type: Improvement Components: regionserver Reporter: Feng Honghua Assignee: Feng Honghua
When user calls Increment by providing amount=0, we don't write the original value to WAL or memstore : adding 0 yields a 'new' value just with the same value as the original one. 1. user provides 0 amount for query rather than for update, this fix is ok; this intention is the most possible case; 2. user provides 0 amount for an update, this fix is also ok : no need to touch back-end value if that value isn't changed; 3. either case we both return correct value, and keep subsequent query results correct : if the 0 amount Increment is the first update, the query is the same for retrieving a 0 value or retrieving nothing; -- This message was sent by Atlassian JIRA (v6.1.5#6160)