Hi all,
I want to do a scan on a number of rows, each row having multiple columns, and
I want to filter out some of this columns based on their values per example, if
I have the following rows:
plainRow:col:value1 column=T:19, timestamp=19,
value=
plainRow:col:value1 column=T:2, timestamp=2,
value=U
plainRow:col:value1 column=T:3, timestamp=3,
value=U
plainRow:col:value1 column=T:4, timestamp=4, value=
and
secondRow:col:value1 column=T:1, timestamp=1,
value=
secondRow:col:value1 column=T:2, timestamp=2,
value=
secondRow:col:value1 column=T:3, timestamp=3,
value=U
secondRow:col:value1 column=T:4, timestamp=4, value=
and I want to select all the rows but just with the columns that don't have the
value "U", something like:
plainRow:col:value1 column=T:19, timestamp=19,
value=
plainRow:col:value1 column=T:4, timestamp=4, value=
secondRow:col:value1 column=T:1, timestamp=1,
value=
secondRow:col:value1 column=T:2, timestamp=2,
value=
secondRow:col:value1 column=T:4, timestamp=4, value=
and to achieve this, i try the following:
Scan scan = new Scan();
scan.setStartRow(stringToBytes(rowIdentifier));
scan.setStopRow(stringToBytes(rowIdentifier + Constants.MAX_CHAR));
scan.addFamily(Constants.TERM_VECT_COLUMN_FAMILY);
if(includeFilter) {
Filter filter = new ValueFilter(CompareOp.EQUAL,
new BinaryComparator(stringToBytes("U")));
scan.setFilter(filter);
}
and if i execute this scan I get the rows with the columns having the value
"U", which is correct, but when i set CompareOp.NOT_EQUAL and i expect to get
the other columns it doesnt work the way i want, it give me back all the rows,
including the one which have the value "U", the same happens when i use:
Filter filter = new ValueFilter(CompareOp.EQUAL, new
BinaryComparator(stringToBytes("")));
I mention that the columns have the values "U" and "" (empty string), and that
i also saw the same behaivior with the RegexComparator and SubstringComparator.
Any idea would be very much appreciated, sorry for the long mail, thank you.
Stefan Comanita
