Github user aertoria commented on a diff in the pull request:
https://github.com/apache/phoenix/pull/262#discussion_r126779607
--- Diff:
phoenix-core/src/it/java/org/apache/phoenix/end2end/QueryWithTableSampleIT.java
---
@@ -0,0 +1,261 @@
+/*
+ * 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.end2end;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.util.Properties;
+
+import org.apache.phoenix.exception.PhoenixParserException;
+import org.apache.phoenix.util.PropertiesUtil;
+import org.apache.phoenix.util.TestUtil;
+import org.junit.Before;
+import org.junit.Test;
+
+
+public class QueryWithTableSampleIT extends ParallelStatsEnabledIT {
+ private String tableName;
+ private String joinedTableName;
+
+ @Before
+ public void generateTableNames() {
+ tableName = "T_" + generateUniqueName();
+ joinedTableName = "T_" + generateUniqueName();
+ }
+
+ @Test(expected=PhoenixParserException.class)
+ public void testSingleQueryWrongSyntax() throws Exception {
+ Properties props =
PropertiesUtil.deepCopy(TestUtil.TEST_PROPERTIES);
+ Connection conn = DriverManager.getConnection(getUrl(), props);
+ try {
+ prepareTableWithValues(conn, 100);
+ String query = "SELECT i1, i2 FROM " + tableName +"
tablesample 15 ";
+
+ ResultSet rs = conn.createStatement().executeQuery(query);
+ inspect(rs);
+ } finally {
+ conn.close();
+ }
+ }
+
+ @Test(expected=PhoenixParserException.class)
+ public void testSingleQueryWrongSamplingRate() throws Exception {
+ Properties props =
PropertiesUtil.deepCopy(TestUtil.TEST_PROPERTIES);
+ Connection conn = DriverManager.getConnection(getUrl(), props);
+ try {
+ prepareTableWithValues(conn, 100);
+ String query = "SELECT i1, i2 FROM " + tableName +"
tablesample (175) ";
+
+ ResultSet rs = conn.createStatement().executeQuery(query);
+ inspect(rs);
+ } finally {
+ conn.close();
+ }
+ }
+
+ @Test
+ public void testSingleQueryZeroSamplingRate() throws Exception {
+ Properties props =
PropertiesUtil.deepCopy(TestUtil.TEST_PROPERTIES);
+ Connection conn = DriverManager.getConnection(getUrl(), props);
+ try {
+ prepareTableWithValues(conn, 100);
+ String query = "SELECT i1, i2 FROM " + tableName +"
tablesample (0) ";
+ ResultSet rs = conn.createStatement().executeQuery(query);
+ assertFalse(rs.next());
+ } finally {
+ conn.close();
+ }
+ }
+
+ @Test
+ public void testSingleQuery() throws Exception {
+ Properties props =
PropertiesUtil.deepCopy(TestUtil.TEST_PROPERTIES);
+ Connection conn = DriverManager.getConnection(getUrl(), props);
+ try {
+ prepareTableWithValues(conn, 100);
+ String query = "SELECT i1, i2 FROM " + tableName +"
tablesample (45) ";
+ ResultSet rs = conn.createStatement().executeQuery(query);
+
+ assertTrue(rs.next());
+ assertEquals(2, rs.getInt(1));
+ assertEquals(200, rs.getInt(2));
+
+ assertTrue(rs.next());
+ assertEquals(6, rs.getInt(1));
+ assertEquals(600, rs.getInt(2));
+
+ } finally {
+ conn.close();
+ }
+ }
+
+ @Test
+ public void testSingleQueryWithWhereClause() throws Exception {
+ Properties props =
PropertiesUtil.deepCopy(TestUtil.TEST_PROPERTIES);
+ Connection conn = DriverManager.getConnection(getUrl(), props);
+ try {
+ prepareTableWithValues(conn, 100);
+ String query = "SELECT i1, i2 FROM " + tableName +"
tablesample (22) where i2>=300 and i1<14 LIMIT 4 ";
+ ResultSet rs = conn.createStatement().executeQuery(query);
+
+ assertTrue(rs.next());
+ assertEquals(8, rs.getInt(1));
+
+ assertTrue(rs.next());
+ assertEquals(10, rs.getInt(1));
+
+ assertTrue(rs.next());
+ assertEquals(12, rs.getInt(1));
+
+
+ } finally {
+ conn.close();
+ }
+ }
+
+ @Test
+ public void testSingleQueryWithAggregator() throws Exception {
+ Properties props =
PropertiesUtil.deepCopy(TestUtil.TEST_PROPERTIES);
+ Connection conn = DriverManager.getConnection(getUrl(), props);
+ try {
+ prepareTableWithValues(conn, 100);
+ String query = "SELECT count(i1) FROM " + tableName +"
tablesample (22) where i2>=3000 or i1<2 ";
+ ResultSet rs = conn.createStatement().executeQuery(query);
+
+ assertTrue(rs.next());
+ assertEquals(14, rs.getInt(1));
+ } finally {
+ conn.close();
+ }
+ }
+
+ @Test
+ public void testSingleQueryWithUnion() throws Exception {
+ Properties props =
PropertiesUtil.deepCopy(TestUtil.TEST_PROPERTIES);
+ Connection conn = DriverManager.getConnection(getUrl(), props);
+ try {
+ prepareTableWithValues(conn, 100);
+ String query = "SELECT * FROM " + tableName +" tablesample
(100) where i1<2 union all SELECT * FROM " + tableName +" tablesample (2) where
i2<6000";
+ ResultSet rs = conn.createStatement().executeQuery(query);
+
+ assertTrue(rs.next());
+ assertEquals(0, rs.getInt(1));
+ assertTrue(rs.next());
+ assertEquals(1, rs.getInt(1));
+ assertTrue(rs.next());
+ assertEquals(30, rs.getInt(1));
+ assertTrue(rs.next());
+ assertEquals(44, rs.getInt(1));
+ } finally {
+ conn.close();
+ }
+ }
+
+ @Test
+ public void testSingleQueryWithSubQuery() throws Exception {
+ Properties props =
PropertiesUtil.deepCopy(TestUtil.TEST_PROPERTIES);
+ Connection conn = DriverManager.getConnection(getUrl(), props);
+ try {
+ prepareTableWithValues(conn, 100);
+ String query = "SELECT count(*) FROM (SELECT * FROM " +
tableName +" tablesample (50))";
+ ResultSet rs = conn.createStatement().executeQuery(query);
+
+ assertTrue(rs.next());
+ assertEquals(50, rs.getInt(1));
+ } finally {
+ conn.close();
+ }
+ }
+
+ @Test
+ public void testSingleQueryWithJoins() throws Exception {
+ Properties props =
PropertiesUtil.deepCopy(TestUtil.TEST_PROPERTIES);
+ Connection conn = DriverManager.getConnection(getUrl(), props);
+ try {
+ prepareTableWithValues(conn, 100);
+ String query = "SELECT count(*) FROM " + tableName +" as A
tablesample (45), "+joinedTableName+" as B tablesample (75) where A.i1=B.i1";
+ System.out.println(query);
+ ResultSet rs = conn.createStatement().executeQuery(query);
+
+ assertTrue(rs.next());
+ assertEquals(31, rs.getInt(1));
+ } finally {
+ conn.close();
+ }
+ }
+
+ final private static void inspect(final ResultSet rs) throws
SQLException{
+ while(rs.next()){
+ System.out.println(rs.getInt(1)+","+rs.getInt(2));
--- End diff --
Correct. I forgot to remove it.
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