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read metadata in SimpleQueryableIndex if available to compute segment ordering #17181

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Sep 28, 2024
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read metadata in SimpleQueryableIndex if available to compute segment ordering #17181

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17 changes: 10 additions & 7 deletions processing/src/main/java/org/apache/druid/segment/SimpleQueryableIndex.java
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Original file line number Diff line number Diff line change
Expand Up @@ -49,6 +49,7 @@ public abstract class SimpleQueryableIndex implements QueryableIndex
private final Map<String, Supplier<ColumnHolder>> columns;
private final SmooshedFileMapper fileMapper;
private final Supplier<Map<String, DimensionHandler>> dimensionHandlers;
private final List<OrderBy> ordering;

public SimpleQueryableIndex(
Interval dataInterval,
Expand Down Expand Up @@ -83,6 +84,14 @@ public SimpleQueryableIndex(
} else {
this.dimensionHandlers = () -> initDimensionHandlers(availableDimensions);
}

final Metadata metadata = getMetadata();
if (metadata != null && metadata.getOrdering() != null) {
this.ordering = metadata.getOrdering();
} else {
// When sort order isn't set in metadata.drd, assume the segment is sorted by __time.
this.ordering = Cursors.ascendingTimeOrder();
}
}

@Override
Expand Down Expand Up @@ -112,13 +121,7 @@ public Indexed<String> getAvailableDimensions()
@Override
public List<OrderBy> getOrdering()
{
final Metadata metadata = getMetadata();
if (metadata != null && metadata.getOrdering() != null) {
return metadata.getOrdering();
} else {
// When sort order isn't set in metadata.drd, assume the segment is sorted by __time.
return Cursors.ascendingTimeOrder();
}
return ordering;
}

@Override
Expand Down
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