mihaibudiu commented on code in PR #4803:
URL: https://github.com/apache/calcite/pull/4803#discussion_r2955433875
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core/src/main/java/org/apache/calcite/plan/hep/HepPlanner.java:
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@@ -470,7 +541,13 @@ private void applyRules(HepProgram.State programState,
// To the extent possible, pick up where we left
// off; have to create a new iterator because old
// one was invalidated by transformation.
- iter = getGraphIterator(programState, newVertex);
+ if (!useHepVertexIterator) {
+ iter = getGraphIterator(programState, newVertex);
+ } else {
+ // Continue from newVertex and keep previous iterator status.
+ // It prevents revisiting the large plan's stable subgraph from
root.
Review Comment:
You should add this information to a comment, it seems useful
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