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Subject [GitHub] [drill] paul-rogers commented on a change in pull request #1888: DRILL-5956: Add Storage Plugin for Apache Druid
Date Sat, 14 Mar 2020 07:09:22 GMT
paul-rogers commented on a change in pull request #1888: DRILL-5956: Add Storage Plugin for
Apache Druid
URL: https://github.com/apache/drill/pull/1888#discussion_r392562925
 
 

 ##########
 File path: contrib/storage-druid/src/main/java/org/apache/drill/exec/store/druid/DruidScanSpecBuilder.java
 ##########
 @@ -0,0 +1,139 @@
+/*
+ * 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.drill.exec.store.druid;
+
+import org.apache.drill.common.expression.SchemaPath;
+import org.apache.drill.exec.store.druid.common.DruidBoundFilter;
+import org.apache.drill.exec.store.druid.common.DruidIntervalFilter;
+import org.apache.drill.exec.store.druid.common.DruidNotFilter;
+import org.apache.drill.exec.store.druid.common.DruidRegexFilter;
+import org.apache.drill.exec.store.druid.common.DruidSearchFilter;
+import org.apache.drill.exec.store.druid.common.DruidSelectorFilter;
+import org.apache.drill.exec.store.druid.druid.SelectQuery;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.IOException;
+
+class DruidScanSpecBuilder {
+
+  private static final Logger logger = LoggerFactory.getLogger(DruidScanSpecBuilder.class);
+
+  private static final String REGEX_KEYWORD_HINT = "$regex$_";
+
+  DruidScanSpec build(String dataSourceName,
+                      String functionName,
+                      SchemaPath field,
+                      Object fieldValue) throws IOException {
+    // extract the field name
+
+    String fieldName = field.getAsNamePart().getName(); //.getAsUnescapedPath();
+    String filter;
+
+    logger.debug("createDruidScanSpec called. FunctionName - "
+      + functionName + ", field - " + fieldName + ", fieldValue - " + fieldValue);
+
+    switch (functionName) {
+      case "equal":
+      {
 
 Review comment:
   If these are Drill functions, another place to use the `FunctionName` constants.
   
   Nit: in Drill style:
   
   ```
   case "equal": {
   ```

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