[SPARK-53784] Additional Source APIs needed to support RTM execution #52501
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viirya
reviewed
Oct 4, 2025
| * Merge partitioned offsets coming from {@link SupportsRealTimeMode} instances | ||
| * for each partition to a single global offset. | ||
| */ | ||
| Offset mergeOffsets(PartitionOffset[] offsets); |
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Is this used to compute the start offsets of the next batch?
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yes essentially. It is the function used to merge offsets returned by each partition at the end of batch which is the starting offset of the batch.
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Merged to master. Thanks @jerrypeng |
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thanks @viirya ! |
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What changes were proposed in this pull request?
Described in the jira ticket: https://issues.apache.org/jira/browse/SPARK-53784
Here is an example for reference of how the API is used to craft a in-memory source that supports RTM:
sql/core/src/main/scala/org/apache/spark/sql/execution/streaming/sources/LowLatencyMemoryStream.scala
Why are the changes needed?
Needed to support Real-time Mode time based batch execution in sources.
Does this PR introduce any user-facing change?
Yes, adds additional APIs needed for sources to be able integrate with Real-time mode.
How was this patch tested?
Not applicable since only interfaces are introduced
Was this patch authored or co-authored using generative AI tooling?
no