Github user hsuanyi commented on a diff in the pull request:
https://github.com/apache/drill/pull/397#discussion_r56434976
--- Diff:
exec/java-exec/src/main/java/org/apache/drill/exec/planner/sql/DrillSqlAggOperatorNotInfer.java
---
@@ -0,0 +1,43 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ * <p/>
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * <p/>
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.drill.exec.planner.sql;
+
+import org.apache.calcite.rel.type.RelDataType;
+import org.apache.calcite.rel.type.RelDataTypeFactory;
+import org.apache.calcite.sql.SqlCall;
+import org.apache.calcite.sql.type.SqlTypeName;
+import org.apache.calcite.sql.validate.SqlValidator;
+import org.apache.calcite.sql.validate.SqlValidatorScope;
+import org.apache.drill.exec.expr.fn.DrillFuncHolder;
+
+import java.util.ArrayList;
+
+public class DrillSqlAggOperatorNotInfer extends DrillSqlAggOperator {
+ public DrillSqlAggOperatorNotInfer(String name, int argCount) {
+ super(name, new ArrayList<DrillFuncHolder>(), argCount, argCount,
DynamicReturnType.INSTANCE);
+ }
+
+ @Override
+ public RelDataType deriveType(SqlValidator validator, SqlValidatorScope
scope, SqlCall call) {
+ return getAny(validator.getTypeFactory());
+ }
+
+ private RelDataType getAny(RelDataTypeFactory factory){
+ return factory.createSqlType(SqlTypeName.ANY);
--- End diff --
DrillSqlAggOperatorNotInfer.java corresponds to the DrillSqlAggOperator in
the old code[1]. When the inference option is being turned off, we want to fall
back to the original behavior as close as possible. With that in mind, I was
trying to not change the logic too much.
[1]https://github.com/apache/drill/blob/d7eebec41a1636055be1b2c79b693d76c52d8932/exec/java-exec/src/main/java/org/apache/drill/exec/planner/sql/DrillSqlAggOperator.java#L50
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