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branch-4.1: [fix](mtmv) Add null-safety to getBaseViewsOneLevel for backward compatibility #64412 #64500

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Merged
yiguolei merged 1 commit into from
Jun 16, 2026
Merged

branch-4.1: [fix](mtmv) Add null-safety to getBaseViewsOneLevel for backward compatibility #64412 #64500

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13 changes: 12 additions & 1 deletion fe/fe-core/src/main/java/org/apache/doris/mtmv/MTMVRelation.java
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Original file line number Diff line number Diff line change
Expand Up @@ -18,13 +18,16 @@
package org.apache.doris.mtmv;

import org.apache.doris.datasource.CatalogMgr;
import org.apache.doris.persist.gson.GsonPostProcessable;

import com.google.gson.annotations.SerializedName;
import org.apache.commons.collections4.CollectionUtils;

import java.io.IOException;
import java.util.HashSet;
import java.util.Set;

public class MTMVRelation {
public class MTMVRelation implements GsonPostProcessable {
// t1 => v1 => v2
// t2 => mv1
// mv1 join v2 => mv2
Expand Down Expand Up @@ -80,6 +83,14 @@ public Set<BaseTableInfo> getBaseViews() {
return baseViews;
}

@Override
public void gsonPostProcess() throws IOException {
// For backward compatibility: previously created MTMV may not have baseViewsOneLevel
if (baseViewsOneLevel == null) {
baseViewsOneLevel = baseViews == null ? new HashSet<>() : new HashSet<>(baseViews);
}
}

// toString() is not easy to find where to call the method
public String toInfoString() {
return "MTMVRelation{"
Expand Down
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