Github user jackylk commented on a diff in the pull request:
https://github.com/apache/carbondata/pull/2440#discussion_r200029615
--- Diff:
store/core/src/main/java/org/apache/carbondata/store/rest/service/ServiceUtil.java
---
@@ -0,0 +1,107 @@
+/*
+ * 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.carbondata.store.rest.service;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+import org.apache.carbondata.core.constants.CarbonCommonConstants;
+import org.apache.carbondata.core.metadata.datatype.DataTypes;
+import org.apache.carbondata.core.scan.expression.Expression;
+import org.apache.carbondata.core.util.CarbonUtil;
+import org.apache.carbondata.sdk.file.Field;
+import org.apache.carbondata.store.exception.StoreException;
+
+import org.apache.commons.lang.StringUtils;
+
+public class ServiceUtil {
+
+ public static Expression parseFilter(String filter) {
+ if (filter == null) {
+ return null;
+ }
+
+ // TODO parse filter sql to Expression object
+
+ return null;
+ }
+
+ public static List<String> prepareSortColumns(
--- End diff --
please move this into `TableSchemaBuilder` which validate the sort columns
---
