| /* |
| * 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 org.apache.phoenix.schema.ColumnNotFoundException; |
| import org.apache.phoenix.util.PropertiesUtil; |
| import org.apache.phoenix.util.QueryUtil; |
| import org.junit.Before; |
| import org.junit.Test; |
| |
| import java.sql.*; |
| import java.util.Properties; |
| |
| import static org.apache.phoenix.util.TestUtil.TEST_PROPERTIES; |
| import static org.junit.Assert.*; |
| |
| public class CountDistinctApproximateHyperLogLogIT extends ParallelStatsDisabledIT { |
| private String tableName; |
| |
| @Before |
| public void generateTableNames() { |
| tableName = "T_" + generateUniqueName(); |
| } |
| |
| @Test(expected = ColumnNotFoundException.class) |
| public void testDistinctCountException() throws Exception { |
| String query = "SELECT APPROX_COUNT_DISTINCT(x) FROM " + tableName; |
| Properties props = PropertiesUtil.deepCopy(TEST_PROPERTIES); |
| |
| try (Connection conn = DriverManager.getConnection(getUrl(), props); |
| PreparedStatement statement = conn.prepareStatement(query);) { |
| prepareTableWithValues(conn, 100); |
| ResultSet rs = statement.executeQuery(); |
| } |
| } |
| |
| @Test |
| public void testDistinctCountOnConstant() throws Exception { |
| String query = "SELECT APPROX_COUNT_DISTINCT(20) FROM " + tableName; |
| Properties props = PropertiesUtil.deepCopy(TEST_PROPERTIES); |
| |
| try (Connection conn = DriverManager.getConnection(getUrl(), props); |
| PreparedStatement statement = conn.prepareStatement(query);) { |
| prepareTableWithValues(conn, 100); |
| ResultSet rs = statement.executeQuery(); |
| |
| assertTrue(rs.next()); |
| assertEquals(1, rs.getLong(1)); |
| assertFalse(rs.next()); |
| } |
| } |
| |
| @Test |
| public void testDistinctCountOnSingleColumn() throws Exception { |
| String query = "SELECT APPROX_COUNT_DISTINCT(i2) FROM " + tableName; |
| Properties props = PropertiesUtil.deepCopy(TEST_PROPERTIES); |
| |
| try (Connection conn = DriverManager.getConnection(getUrl(), props); |
| PreparedStatement statement = conn.prepareStatement(query);) { |
| prepareTableWithValues(conn, 100); |
| ResultSet rs = statement.executeQuery(); |
| |
| assertTrue(rs.next()); |
| assertEquals(10, rs.getLong(1)); |
| assertFalse(rs.next()); |
| } |
| } |
| |
| @Test |
| public void testDistinctCountOnMutlipleColumns() throws Exception { |
| String query = "SELECT APPROX_COUNT_DISTINCT(i1||i2) FROM " + tableName; |
| Properties props = PropertiesUtil.deepCopy(TEST_PROPERTIES); |
| |
| try (Connection conn = DriverManager.getConnection(getUrl(), props); |
| PreparedStatement statement = conn.prepareStatement(query);) { |
| prepareTableWithValues(conn, 100); |
| |
| ResultSet rs = statement.executeQuery(); |
| |
| assertTrue(rs.next()); |
| assertEquals(100, rs.getLong(1)); |
| assertFalse(rs.next()); |
| } |
| } |
| |
| @Test |
| public void testDistinctCountOnjoining() throws Exception { |
| String query = "SELECT APPROX_COUNT_DISTINCT(a.i1||a.i2||b.i2) FROM " + tableName + " a, " + tableName |
| + " b where a.i1=b.i1 and a.i2 = b.i2"; |
| Properties props = PropertiesUtil.deepCopy(TEST_PROPERTIES); |
| |
| try(Connection conn = DriverManager.getConnection(getUrl(), props); |
| PreparedStatement statement = conn.prepareStatement(query);) { |
| prepareTableWithValues(conn, 100); |
| ResultSet rs = statement.executeQuery(); |
| |
| assertTrue(rs.next()); |
| assertEquals(100, rs.getLong(1)); |
| assertFalse(rs.next()); |
| } |
| } |
| |
| @Test |
| public void testDistinctCountPlanExlain() throws Exception { |
| Properties props = PropertiesUtil.deepCopy(TEST_PROPERTIES); |
| String query = "explain SELECT APPROX_COUNT_DISTINCT(i1||i2) FROM " + tableName; |
| |
| try(Connection conn = DriverManager.getConnection(getUrl(), props); |
| PreparedStatement statement = conn.prepareStatement(query);) { |
| prepareTableWithValues(conn, 100); |
| ResultSet rs = statement.executeQuery(); |
| |
| assertEquals("CLIENT PARALLEL 1-WAY FULL SCAN OVER " + tableName + "\n" |
| + " SERVER FILTER BY FIRST KEY ONLY\n" + " SERVER AGGREGATE INTO SINGLE ROW", |
| QueryUtil.getExplainPlan(rs)); |
| } |
| } |
| |
| /** |
| * Prepare tables with stats updated. format of first table such as i1, i2 |
| * 1, 10 2, 20 3, 30 ... |
| * |
| * @param conn |
| * @param nRows |
| * @throws Exception |
| */ |
| final private void prepareTableWithValues(final Connection conn, final int nRows) throws Exception { |
| conn.createStatement().execute("create table " + tableName + "\n" |
| + " (i1 integer not null, i2 integer not null\n" + " CONSTRAINT pk PRIMARY KEY (i1,i2))"); |
| |
| final PreparedStatement stmt = conn.prepareStatement("upsert into " + tableName + " VALUES (?, ?)"); |
| for (int i = 0; i < nRows; i++) { |
| stmt.setInt(1, i); |
| stmt.setInt(2, (i * 10) % 100); |
| stmt.execute(); |
| } |
| conn.commit(); |
| } |
| } |