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Lars Hofhansl commented on HBASE-6757: -------------------------------------- Interesting. I just looked at the code and I agree this is wrong. > Very inefficient behaviour of scan using FilterList > --------------------------------------------------- > > Key: HBASE-6757 > URL: https://issues.apache.org/jira/browse/HBASE-6757 > Project: HBase > Issue Type: Improvement > Components: filters > Affects Versions: 0.90.6 > Reporter: Jerry Lam > > The behaviour of scan is very inefficient when using with FilterList. > The FilterList rewrites the return code from NEXT_ROW to SKIP from a filter > if Operator.MUST_PASS_ALL is used. > This happens when using ColumnPrefixFilter. Even though the > ColumnPrefixFilter indicates to jump to NEXT_ROW because no further match can > be found, the scan continues to scan all versions of a column in that row and > all columns of that row because the ReturnCode from ColumnPrefixFilter has > been rewritten by the FilterList from NEXT_ROW to SKIP. > This is particularly inefficient when there are many versions in a column > because the check is performed on all versions of the column instead of just > by checking the qualifier of the column name. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira