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Lars Hofhansl updated HBASE-6757: --------------------------------- Fix Version/s: 0.94.2 0.96.0 Let me target 0.94.2 for now. Simple fix, low risk (see discussion above), performance fix. Ted, if you feel strongly about this, I'll of course remove the 0.94 tag. > 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 > Fix For: 0.96.0, 0.94.2 > > Attachments: 6757.txt, CopyOfTestColumnPrefixFilter.java, > DisplayFilter.java > > > 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