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https://issues.apache.org/jira/browse/PHOENIX-6711?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17537278#comment-17537278
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ASF GitHub Bot commented on PHOENIX-6711:
-----------------------------------------
chrajeshbabu commented on code in PR #1437:
URL: https://github.com/apache/phoenix/pull/1437#discussion_r873245760
##########
phoenix-core/src/it/java/org/apache/phoenix/query/SkipSystemTablesExistenceCheckIT.java:
##########
@@ -0,0 +1,78 @@
+/*
+ * 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.phoenix.query;
+
+import org.apache.phoenix.end2end.ParallelStatsDisabledIT;
+import org.apache.phoenix.end2end.ParallelStatsDisabledTest;
+import org.apache.phoenix.jdbc.PhoenixConnection;
+import org.apache.phoenix.jdbc.PhoenixStatement;
+import org.junit.Test;
+import org.junit.experimental.categories.Category;
+
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.util.Properties;
+
+import static org.apache.phoenix.util.TestUtil.PHOENIX_JDBC_URL;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+
+
+@Category(ParallelStatsDisabledTest.class)
+@SuppressWarnings("deprecated")
+public class SkipSystemTablesExistenceCheckIT extends ParallelStatsDisabledIT {
+
+ @Test
+ public void testTableResultIterator() throws Exception {
+ Connection conn = DriverManager.getConnection(PHOENIX_JDBC_URL);
+ PhoenixConnection phoenixConnection =
conn.unwrap(PhoenixConnection.class);
+ String tableName = generateUniqueName();
+
+ conn.createStatement().execute("CREATE TABLE " + tableName
+ + " (A UNSIGNED_LONG NOT NULL PRIMARY KEY, B VARCHAR(10))");
+ conn.createStatement().execute("UPSERT INTO " + tableName + " VALUES
(1, 'A')");
+ conn.createStatement().execute("UPSERT INTO " + tableName + " VALUES
(2, 'B')");
+ conn.createStatement().execute("UPSERT INTO " + tableName + " VALUES
(3, 'C')");
+ conn.createStatement().execute("UPSERT INTO " + tableName + " VALUES
(4, 'D')");
+ conn.commit();
+
+ scanTable(conn, tableName);
+ Properties props = new Properties();
+ props.setProperty(QueryServices.SKIP_SYSTEM_TABLES_EXISTENCE_CHECK,
"true");
+ ConnectionQueryServicesImpl queryServices =
((ConnectionQueryServicesImpl)phoenixConnection.getQueryServices());
+ queryServices.setInitialized(false);
+ queryServices.init(PHOENIX_JDBC_URL, props);
Review Comment:
Added this test to check any cache of system tables is missing or any impact
on scans. Initializing the CQSI once per JVM. but batch oriented jobs like
spark or hive might run the jobs in different JVMs so each time checking for
the system tables during connection creation in workers might create
unnecessary calls to RS holding the system catalog tables. Currently in tests
it's become difficult to simulate the same because tests run under a JVM so
just reinitializing the CQSI by skipping the existence of the system tables.
> Add support of skipping the system tables existence check during connection
> initialisation and create new table result iterator which doesn't require
> fetch meta data of table
> ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: PHOENIX-6711
> URL: https://issues.apache.org/jira/browse/PHOENIX-6711
> Project: Phoenix
> Issue Type: Sub-task
> Reporter: Rajeshbabu Chintaguntla
> Assignee: Rajeshbabu Chintaguntla
> Priority: Major
> Fix For: 5.1.2
>
>
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