clintropolis commented on a change in pull request #8822: optimize numeric
column null value checking for low filter selectivity (more rows)
URL: https://github.com/apache/incubator-druid/pull/8822#discussion_r343338943
##########
File path:
processing/src/main/java/org/apache/druid/segment/data/ColumnarDoubles.java
##########
@@ -94,10 +95,20 @@ public void inspectRuntimeShape(RuntimeShapeInspector
inspector)
} else {
class HistoricalDoubleColumnSelectorWithNulls implements
DoubleColumnSelector, HistoricalColumnSelector<Double>
{
+ private final PeekableIntIterator nullIterator =
nullValueBitmap.peekableIterator();
+ private int nullMark = -1;
+
@Override
public boolean isNull()
{
- return nullValueBitmap.get(offset.getOffset());
+ final int i = offset.getOffset();
+ if (nullMark < i) {
Review comment:
This is a good point, I forgot about reset, will fix (hopefully without
adding too many extra instructions since this is called in a hot loop :cry:)
----------------------------------------------------------------
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
For queries about this service, please contact Infrastructure at:
us...@infra.apache.org
With regards,
Apache Git Services
---------------------------------------------------------------------
To unsubscribe, e-mail: commits-unsubscr...@druid.apache.org
For additional commands, e-mail: commits-h...@druid.apache.org
