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From "Alex Newman (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-6912) Filters are not properly applied in certain cases
Date Mon, 01 Oct 2012 23:41:12 GMT
Alex Newman created HBASE-6912:
----------------------------------

             Summary: Filters are not properly applied in certain cases
                 Key: HBASE-6912
                 URL: https://issues.apache.org/jira/browse/HBASE-6912
             Project: HBase
          Issue Type: Bug
            Reporter: Alex Newman


Steps to reproduce:

Create a table, load data into it. Flush the table.

Do a scan with
1. Some filter which should not match the first entry in the scan
2. Where one specifies a family and column.
You will notice that the first entry is returned even though it doesn't match the filter.

It looks like the when the first KeyValue of a scan in the column from the point of view of
the code

HRegion.java
} else if (kv != null && !kv.isInternal() && filterRowKey(currentRow)) {
Is generated by

public static KeyValue createLastOnRow(final byte [] row,
final int roffset, final int rlength, final byte [] family,
final int foffset, final int flength, final byte [] qualifier,
final int qoffset, final int qlength) { return new KeyValue(row, roffset, rlength, family,
foffset, flength, qualifier, qoffset, qlength, HConstants.OLDEST_TIMESTAMP, Type.Minimum,
null, 0, 0); }
So it is always internal from that point of the code.

Only later from within
StoreScanner.java
public synchronized boolean next(List<KeyValue> outResult, int limit, String metric)
throws IOException {
....
LOOP: while((kv = this.heap.peek()) != null) {
( The second time through)

Do we get the actual kv, with a proper type and timestamp. This seems to mess with filtering.


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