hqx871 commented on a change in pull request #2363:
URL: https://github.com/apache/calcite/pull/2363#discussion_r591384463
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File path: core/src/main/java/org/apache/calcite/rel/core/Sort.java
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@@ -124,11 +126,20 @@ public abstract Sort copy(RelTraitSet traitSet, RelNode
newInput,
@Override public @Nullable RelOptCost computeSelfCost(RelOptPlanner planner,
RelMetadataQuery mq) {
+ double rowCount = mq.getRowCount(this);
+ if (collation.getFieldCollations().isEmpty()) {
+ return planner.getCostFactory().makeCost(rowCount, 0, 0);
+ }
+ int offsetValue = offset == null || offset instanceof RexDynamicParam ? 0
+ : RexLiteral.intValue(offset);
Review comment:
I agree. I have try to add a RexLiteral.longValue method, but found
there are too many place use RexLiteral.intValue, such as RelMdRowCount.
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