englefly commented on code in PR #35074:
URL: https://github.com/apache/doris/pull/35074#discussion_r1611330036
##########
fe/fe-core/src/main/java/org/apache/doris/nereids/rules/rewrite/AdjustNullable.java:
##########
@@ -165,45 +165,52 @@ public Plan visitLogicalRepeat(LogicalRepeat<? extends
Plan> repeat, Map<ExprId,
@Override
public Plan visitLogicalSetOperation(LogicalSetOperation setOperation,
Map<ExprId, Slot> replaceMap) {
setOperation = (LogicalSetOperation) super.visit(setOperation,
replaceMap);
- if (setOperation.children().isEmpty()) {
- return setOperation;
- }
- List<Boolean> inputNullable =
setOperation.child(0).getOutput().stream()
- .map(ExpressionTrait::nullable).collect(Collectors.toList());
ImmutableList.Builder<List<SlotReference>> newChildrenOutputs =
ImmutableList.builder();
- for (int i = 0; i < setOperation.arity(); i++) {
- List<Slot> childOutput = setOperation.child(i).getOutput();
- List<SlotReference> setChildOutput =
setOperation.getRegularChildOutput(i);
- ImmutableList.Builder<SlotReference> newChildOutputs =
ImmutableList.builder();
- for (int j = 0; j < setChildOutput.size(); j++) {
- for (Slot slot : childOutput) {
- if
(slot.getExprId().equals(setChildOutput.get(j).getExprId())) {
- inputNullable.set(j, slot.nullable() ||
inputNullable.get(j));
- newChildOutputs.add((SlotReference) slot);
- break;
+ List<Boolean> inputNullable = null;
+ if (!setOperation.children().isEmpty()) {
+ inputNullable = setOperation.child(0).getOutput().stream()
+
.map(ExpressionTrait::nullable).collect(Collectors.toList());
+ for (int i = 0; i < setOperation.arity(); i++) {
+ List<Slot> childOutput = setOperation.child(i).getOutput();
+ List<SlotReference> setChildOutput =
setOperation.getRegularChildOutput(i);
+ ImmutableList.Builder<SlotReference> newChildOutputs =
ImmutableList.builder();
+ for (int j = 0; j < setChildOutput.size(); j++) {
+ for (Slot slot : childOutput) {
+ if
(slot.getExprId().equals(setChildOutput.get(j).getExprId())) {
+ inputNullable.set(j, slot.nullable() ||
inputNullable.get(j));
+ newChildOutputs.add((SlotReference) slot);
+ break;
+ }
}
}
+ newChildrenOutputs.add(newChildOutputs.build());
}
- newChildrenOutputs.add(newChildOutputs.build());
}
if (setOperation instanceof LogicalUnion) {
LogicalUnion logicalUnion = (LogicalUnion) setOperation;
+ int consExprListSize = logicalUnion.getConstantExprsList().size();
+ if (consExprListSize > 0 && inputNullable == null) {
Review Comment:
!logicalUnion.getConstantExprsList().isEmpty() &&
!setOperation.children().isEmpty()
##########
fe/fe-core/src/main/java/org/apache/doris/nereids/rules/rewrite/AdjustNullable.java:
##########
@@ -165,45 +165,52 @@ public Plan visitLogicalRepeat(LogicalRepeat<? extends
Plan> repeat, Map<ExprId,
@Override
public Plan visitLogicalSetOperation(LogicalSetOperation setOperation,
Map<ExprId, Slot> replaceMap) {
setOperation = (LogicalSetOperation) super.visit(setOperation,
replaceMap);
- if (setOperation.children().isEmpty()) {
- return setOperation;
- }
- List<Boolean> inputNullable =
setOperation.child(0).getOutput().stream()
- .map(ExpressionTrait::nullable).collect(Collectors.toList());
ImmutableList.Builder<List<SlotReference>> newChildrenOutputs =
ImmutableList.builder();
- for (int i = 0; i < setOperation.arity(); i++) {
- List<Slot> childOutput = setOperation.child(i).getOutput();
- List<SlotReference> setChildOutput =
setOperation.getRegularChildOutput(i);
- ImmutableList.Builder<SlotReference> newChildOutputs =
ImmutableList.builder();
- for (int j = 0; j < setChildOutput.size(); j++) {
- for (Slot slot : childOutput) {
- if
(slot.getExprId().equals(setChildOutput.get(j).getExprId())) {
- inputNullable.set(j, slot.nullable() ||
inputNullable.get(j));
- newChildOutputs.add((SlotReference) slot);
- break;
+ List<Boolean> inputNullable = null;
+ if (!setOperation.children().isEmpty()) {
+ inputNullable = setOperation.child(0).getOutput().stream()
+
.map(ExpressionTrait::nullable).collect(Collectors.toList());
+ for (int i = 0; i < setOperation.arity(); i++) {
+ List<Slot> childOutput = setOperation.child(i).getOutput();
+ List<SlotReference> setChildOutput =
setOperation.getRegularChildOutput(i);
+ ImmutableList.Builder<SlotReference> newChildOutputs =
ImmutableList.builder();
+ for (int j = 0; j < setChildOutput.size(); j++) {
+ for (Slot slot : childOutput) {
+ if
(slot.getExprId().equals(setChildOutput.get(j).getExprId())) {
+ inputNullable.set(j, slot.nullable() ||
inputNullable.get(j));
+ newChildOutputs.add((SlotReference) slot);
+ break;
+ }
}
}
+ newChildrenOutputs.add(newChildOutputs.build());
}
- newChildrenOutputs.add(newChildOutputs.build());
}
if (setOperation instanceof LogicalUnion) {
LogicalUnion logicalUnion = (LogicalUnion) setOperation;
+ int consExprListSize = logicalUnion.getConstantExprsList().size();
+ if (consExprListSize > 0 && inputNullable == null) {
+ int outputSize =
logicalUnion.getConstantExprsList().get(0).size();
+ inputNullable = Lists.newArrayListWithCapacity(outputSize);
+ for (int i = 0; i < outputSize; i++) {
+ inputNullable.add(false);
+ }
+ }
for (List<NamedExpression> constantExprs :
logicalUnion.getConstantExprsList()) {
for (int j = 0; j < constantExprs.size(); j++) {
- if (constantExprs.get(j).nullable()) {
- inputNullable.set(j, true);
- }
+ inputNullable.set(j, inputNullable.get(j) ||
constantExprs.get(j).nullable());
}
}
}
+ if (inputNullable == null) {
Review Comment:
logicalUnion.getConstantExprsList().isEmpty() &&
setOperation.children().isEmpty()
=> inputNullable == null
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