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https://issues.apache.org/jira/browse/DRILL-7458?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17019585#comment-17019585
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ASF GitHub Bot commented on DRILL-7458:
---------------------------------------
arina-ielchiieva commented on pull request #1914: DRILL-7458: Base framework
for storage plugins
URL: https://github.com/apache/drill/pull/1914#discussion_r368538674
##########
File path:
exec/java-exec/src/test/java/org/apache/drill/exec/store/base/TestFilterPushDown.java
##########
@@ -0,0 +1,339 @@
+/*
+ * 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.base;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.fail;
+
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.io.FileReader;
+import java.io.IOException;
+import java.io.PrintWriter;
+import java.io.Reader;
+import java.io.StringReader;
+import java.net.URL;
+
+import org.apache.drill.exec.store.StoragePluginRegistry;
+import org.apache.drill.test.ClusterFixtureBuilder;
+import org.apache.drill.test.ClusterTest;
+import org.junit.BeforeClass;
+import org.junit.Ignore;
+import org.junit.Test;
+
+/**
+ * Tests for the Filter push-down helper classes as part of the
+ * "Base" storage plugin to be used for add-on plugins. Uses a
+ * "test mule" ("Dummy") plug-in which goes through the paces of
+ * planning push down, but then glosses over the details at run time.
+ * The focus here are plans: the tests plan a query then compare the
+ * actual plan against and expected ("golden") plan.
+ * <p>
+ * If comparison fails, the tests print the actual plan to the console.
+ * Use this, when adding new tests, to create the initial "golden" file.
+ * Also, on failures, actual output is written to
+ * <code>/tmp/drill/store/base</code>. You can use your IDE to compare
+ * the actual and golden files to understand changes. If the changes
+ * are expected, use that same IDE to copy changes from the actual
+ * to the golden file.
+ * <p>
+ * The JSON properties of the serialized classes are all controlled
+ * to have a fixed order to ensure that files compare across test
+ * runs.
+ */
+public class TestFilterPushDown extends ClusterTest {
+
+ private static final String BASE_SQL = "SELECT a, b FROM dummy.myTable";
+ private static final String BASE_WHERE = BASE_SQL + " WHERE ";
+
+ @BeforeClass
+ public static void setup() throws Exception {
+ ClusterFixtureBuilder builder = new ClusterFixtureBuilder(dirTestWatcher);
+ startCluster(builder);
+
+ StoragePluginRegistry pluginRegistry =
cluster.drillbit().getContext().getStorage();
+ DummyStoragePluginConfig config =
+ new DummyStoragePluginConfig(true, true, false);
+ pluginRegistry.createOrUpdate("dummy", config, true);
Review comment:
Use handy cluster#defineStoragePlugin method.
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> Base storage plugin framework
> -----------------------------
>
> Key: DRILL-7458
> URL: https://issues.apache.org/jira/browse/DRILL-7458
> Project: Apache Drill
> Issue Type: Improvement
> Reporter: Paul Rogers
> Assignee: Paul Rogers
> Priority: Major
> Labels: doc-impacting
> Fix For: 1.18.0
>
>
> The "Easy" framework allows third-parties to add format plugins to Drill with
> moderate effort. (The process could be easier, but "Easy" makes it as simple
> as possible given the current structure.)
> At present, no such "starter" framework exists for storage plugins. Further,
> multiple storage plugins have implemented filter push down, seemingly by
> copying large blocks of code.
> This ticket offers a "base" framework for storage plugins and for filter
> push-downs. The framework builds on the EVF, allowing plugins to also support
> project push down.
> The framework has a "test mule" storage plugin to verify functionality, and
> was used as the basis of an REST-like plugin.
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