jinxing64 commented on a change in pull request #1459: [CALCITE-3347]
IndexOutOfBoundsException in FixNullabilityShuttle when using FilterIntoJoinRule
URL: https://github.com/apache/calcite/pull/1459#discussion_r325671078
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File path: core/src/main/java/org/apache/calcite/rel/rules/FilterJoinRule.java
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@@ -329,7 +330,14 @@ protected void validateJoinFilters(List<RexNode>
aboveFilters,
final Iterator<RexNode> filterIter = joinFilters.iterator();
while (filterIter.hasNext()) {
RexNode exp = filterIter.next();
- if (!predicate.apply(join, joinType, exp)) {
+ int maxIndex = -1;
+ ImmutableList<RexInputRef> inputRefs = RexUtil.getAllInputRef(exp);
+ for (RexInputRef rexInputRef: inputRefs) {
+ if (rexInputRef.getIndex() > maxIndex) {
+ maxIndex = rexInputRef.getIndex();
+ }
+ }
Review comment:
Let's doc to explain the scenario here, e.g. semi-join, anti-join ...
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