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[fix](split)Fixed the bug that batch mode split could not query data in multiple be scenarios. #46218

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Merged
morningman merged 1 commit into from
Dec 31, 2024
Merged

[fix](split)Fixed the bug that batch mode split could not query data in multiple be scenarios. #46218

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5 changes: 4 additions & 1 deletion fe/fe-core/src/main/java/org/apache/doris/datasource/FileQueryScanNode.java
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Original file line number Diff line number Diff line change
Expand Up @@ -340,7 +340,10 @@ public void createScanRangeLocations() throws UserException {
totalFileSize = fileSplit.getLength() * selectedSplitNum;
long maxWaitTime = ConnectContext.get().getSessionVariable().getFetchSplitsMaxWaitTime();
// Not accurate, only used to estimate concurrency.
int numSplitsPerBE = numApproximateSplits() / backendPolicy.numBackends();
// Here, we must take the max of 1, because
// in the case of multiple BEs, `numApproximateSplits() / backendPolicy.numBackends()` may be 0,
// and finally numSplitsPerBE is 0, resulting in no data being queried.
int numSplitsPerBE = Math.max(numApproximateSplits() / backendPolicy.numBackends(), 1);
for (Backend backend : backendPolicy.getBackends()) {
SplitSource splitSource = new SplitSource(backend, splitAssignment, maxWaitTime);
splitSources.add(splitSource);
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