[HBASE-12296] Filters should work with ByteBufferedCell

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.0.0
• Component/s: regionserver, Scanners
• Hadoop Flags: Incompatible change, Reviewed

Release Note

Change to support offheaping.

Incompatible change for filters ColumnPrefixFilter and MultipleColumnPrefixFilter

Changes parameters to filterColumn so takes a Cell rather than a byte [].

hbase-client-1.2.7-SNAPSHOT.jar, ColumnPrefixFilter.class
package org.apache.hadoop.hbase.filter
ColumnPrefixFilter.filterColumn ( byte[ ] buffer, int qualifierOffset, int qualifierLength ) : Filter.ReturnCode
org/apache/hadoop/hbase/filter/ColumnPrefixFilter.filterColumn:([BII)Lorg/apache/hadoop/hbase/filter/Filter$ReturnCode;

Ditto for filterColumnValue in SingleColumnValueFilter. Takes a Cell instead of byte array.

• Assignee: Anoop Sam John
• Reporter: ramkrishna.s.vasudevan
• Created: 20/Oct/14 03:17
• Updated: 17/Jun/22 05:13
• Resolved: 16/Jul/15 04:06

Description

Now we have added an extension for Cell in server side, ByteBufferedCell, where Cells are backed by BB (on heap or off heap). When the Cell is backed by off heap buffer, the getXXXArray() APIs has to create temp byte[] and do data copy and return that. This will be bit costly. We have avoided this in areas like CellComparator/SQM etc. Filter area was not touched in that patch. This Jira aims at doing it in Filter area.
Eg : SCVF checking the cell value for the given value condition. It uses getValueArray() to get cell value bytes. When the cell is BB backed, it has to use getValueByteBuffer() API instead.