[GitHub] [spark] cloud-fan commented on a change in pull request #35494: [SPARK-38196][SQL] Refactor framework so as JDBC dialect could compile expression by self way

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cloud-fan commented on a change in pull request #35494:
URL: https://github.com/apache/spark/pull/35494#discussion_r814530759



##########
File path: sql/catalyst/src/main/java/org/apache/spark/sql/connector/expressions/GeneralScalarExpression.java
##########
@@ -0,0 +1,86 @@
+/*
+ * 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
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.spark.sql.connector.expressions;
+
+import java.io.Serializable;
+import java.util.Arrays;
+
+import org.apache.spark.annotation.Evolving;
+import org.apache.spark.sql.connector.util.V2ExpressionSQLBuilder;
+
+// scalastyle:off line.size.limit
+/**
+ * The general representation of SQL scalar expressions, which contains the upper-cased
+ * expression name and all the children expressions.
+ * <p>
+ * The currently supported SQL aggregate functions:

Review comment:
       ```suggestion
    * The currently supported SQL scalar expressions:
   ```




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