Jackie-Jiang commented on a change in pull request #6924:
URL: https://github.com/apache/incubator-pinot/pull/6924#discussion_r633945719
##########
File path:
pinot-segment-local/src/main/java/org/apache/pinot/segment/local/segment/readers/PinotSegmentRecordReader.java
##########
@@ -132,6 +133,15 @@ public void init(MutableSegment mutableSegment, @Nullable
int[] sortedDocIds) {
init(mutableSegment, false, null, sortedDocIds, null, false);
}
+ /**
+ * Initializes the record reader from a immutable segment.
Review comment:
Move this function in front of the mutable segment one
```suggestion
* Initializes the record reader from an immutable segment.
```
##########
File path:
pinot-segment-local/src/main/java/org/apache/pinot/segment/local/indexsegment/immutable/ImmutableSegmentImpl.java
##########
@@ -171,7 +172,15 @@ public ValidDocIndexReader getValidDocIndex() {
@Override
public GenericRow getRecord(int docId, GenericRow reuse) {
// NOTE: Use PinotSegmentRecordReader to read immutable segment
Review comment:
Remove this line
##########
File path:
pinot-segment-local/src/main/java/org/apache/pinot/segment/local/indexsegment/immutable/ImmutableSegmentImpl.java
##########
@@ -171,7 +172,15 @@ public ValidDocIndexReader getValidDocIndex() {
@Override
public GenericRow getRecord(int docId, GenericRow reuse) {
// NOTE: Use PinotSegmentRecordReader to read immutable segment
- throw new UnsupportedOperationException();
+ try {
+ PinotSegmentRecordReader pinotSegmentRecordReader = new
PinotSegmentRecordReader();
+ pinotSegmentRecordReader.init(this);
+ pinotSegmentRecordReader.getRecord(reuse, docId);
+ return reuse;
+ } catch (Exception e) {
+ LOGGER.error("Failed to use PinotSegmentRecordReader to read immutable
segment", e);
Review comment:
No need to log error here if we are throwing the exception
##########
File path:
pinot-segment-local/src/main/java/org/apache/pinot/segment/local/indexsegment/immutable/ImmutableSegmentImpl.java
##########
@@ -171,7 +172,15 @@ public ValidDocIndexReader getValidDocIndex() {
@Override
public GenericRow getRecord(int docId, GenericRow reuse) {
// NOTE: Use PinotSegmentRecordReader to read immutable segment
- throw new UnsupportedOperationException();
+ try {
+ PinotSegmentRecordReader pinotSegmentRecordReader = new
PinotSegmentRecordReader();
Review comment:
Please cache the record reader instead of creating one per `getRecord`
call
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