Github user jinfengni commented on a diff in the pull request:
https://github.com/apache/drill/pull/397#discussion_r56458540
--- 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 --
why do you extend RexBuilder and override ensureType() here? Most of the
code is identical in RexBuilder.ensureType, except for line 422 - 427. Are they
Drill-specific logic? If the answer is no, then we should put this logic in
Calcite, not in Drill.
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