Github user jinfengni commented on a diff in the pull request:
https://github.com/apache/drill/pull/397#discussion_r56524249
--- Diff:
exec/java-exec/src/main/java/org/apache/drill/exec/planner/sql/SqlConverter.java
---
@@ -364,4 +401,35 @@ private static SchemaPlus rootSchema(SchemaPlus
schema) {
}
}
+ private static class DrillRexBuilder extends RexBuilder {
+ private DrillRexBuilder(RelDataTypeFactory typeFactory) {
+ super(typeFactory);
+ }
+
+ @Override
+ public RexNode ensureType(
+ RelDataType type,
+ RexNode node,
+ boolean matchNullability) {
+ RelDataType targetType = type;
+ if (matchNullability) {
+ targetType = matchNullability(type, node);
+ }
+ if (targetType.getSqlTypeName() == SqlTypeName.ANY) {
+ return node;
+ }
+ if (!node.getType().equals(targetType)) {
+ if(!targetType.isStruct()) {
+ final RelDataType anyType =
TypeInferenceUtils.createCalciteTypeWithNullability(
--- End diff --
Cast an expression to "any" type? why do we have to add this? On line 418,
in Calcite, the code's intention is to skip CAST to "any", since it does not
make sense to cast to "any". Why do you want to explicitly add this here?
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