[ut](stats) Added tests for JDBC analysis tasks (#28591)

fe/fe-core/src/test/java/org/apache/doris/statistics/JdbcAnalysisTaskTest.java

@@ -0,0 +1,157 @@
+// 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.doris.statistics;
+
+import org.apache.doris.catalog.Column;
+import org.apache.doris.catalog.DatabaseIf;
+import org.apache.doris.catalog.PrimitiveType;
+import org.apache.doris.catalog.TableIf;
+import org.apache.doris.catalog.external.JdbcExternalTable;
+import org.apache.doris.datasource.CatalogIf;
+import org.apache.doris.statistics.util.DBObjects;
+import org.apache.doris.statistics.util.StatisticsUtil;
+
+import com.google.common.collect.ImmutableList;
+import mockit.Expectations;
+import mockit.Mock;
+import mockit.MockUp;
+import mockit.Mocked;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+
+import java.util.List;
+
+public class JdbcAnalysisTaskTest {
+    @Test
+    public void testTableStats(@Mocked CatalogIf catalogIf, @Mocked DatabaseIf databaseIf, @Mocked JdbcExternalTable tableIf,
+            @Mocked AnalysisJob job)
+            throws Exception {
+        new Expectations() {
+            {
+                tableIf.getId();
+                result = 30001;
+                tableIf.getName();
+                result = "test";
+                catalogIf.getId();
+                result = 10001;
+                catalogIf.getName();
+                result = "jdbc";
+                databaseIf.getId();
+                result = 20001;
+                databaseIf.getFullName();
+                result = "mysql";
+            }
+        };
+
+        new MockUp<StatisticsUtil>() {
+            @Mock
+            public List<ResultRow> execStatisticQuery(String sql) {
+                Assertions.assertEquals("SELECT COUNT(1) as rowCount FROM `jdbc`.`mysql`.`test`", sql);
+                return ImmutableList.of(new ResultRow(ImmutableList.of("100")));
+            }
+
+            @Mock
+            public DBObjects convertIdToObjects(long catalogId, long dbId, long tblId) {
+                return new DBObjects(catalogIf, databaseIf, tableIf);
+            }
+        };
+
+        new MockUp<AnalysisManager>() {
+            @Mock
+            public void updateTableStatsStatus(TableStatsMeta tableStats) {
+                Assertions.assertEquals(100, tableStats.rowCount);
+            }
+        };
+
+        new MockUp<TableStatsMeta>() {
+            @Mock
+            public void update(AnalysisInfo analyzedJob, TableIf tableIf) {
+                //do nothing
+            }
+        };
+
+        AnalysisInfoBuilder analysisInfoBuilder = new AnalysisInfoBuilder();
+        analysisInfoBuilder.setColName("col1");
+        analysisInfoBuilder.setJobType(AnalysisInfo.JobType.MANUAL);
+        analysisInfoBuilder.setExternalTableLevelTask(true);
+
+        JdbcAnalysisTask task = new JdbcAnalysisTask(analysisInfoBuilder.build());
+        task.col = new Column("col1", PrimitiveType.INT);
+        task.tbl = tableIf;
+        task.catalog = catalogIf;
+        task.db = databaseIf;
+        task.setJob(job);
+
+        task.doExecute();
+    }
+
+    @Test
+    public void testGetColumnStats(@Mocked CatalogIf catalogIf, @Mocked DatabaseIf databaseIf, @Mocked JdbcExternalTable tableIf)
+            throws Exception {
+        new Expectations() {
+            {
+                tableIf.getId();
+                result = 30001;
+                tableIf.getName();
+                result = "test";
+                catalogIf.getId();
+                result = 10001;
+                catalogIf.getName();
+                result = "jdbc";
+                databaseIf.getId();
+                result = 20001;
+                databaseIf.getFullName();
+                result = "mysql";
+            }
+        };
+
+        new MockUp<StatisticsUtil>() {
+            @Mock
+            public DBObjects convertIdToObjects(long catalogId, long dbId, long tblId) {
+                return new DBObjects(catalogIf, databaseIf, tableIf);
+            }
+        };
+
+        new MockUp<JdbcAnalysisTask>() {
+            @Mock
+            public void runQuery(String sql) {
+                Assertions.assertEquals(" SELECT CONCAT(30001, '-', -1, '-', 'col1') AS id, "
+                        + "10001 AS catalog_id, 20001 AS db_id, 30001 AS tbl_id, -1 AS idx_id, 'col1' AS col_id, "
+                        + "NULL AS part_id, COUNT(1) AS row_count, NDV(`col1`) AS ndv, "
+                        + "SUM(CASE WHEN `col1` IS NULL THEN 1 ELSE 0 END) AS null_count, "
+                        + "SUBSTRING(CAST(MIN(`col1`) AS STRING), 1, 1024) AS min, "
+                        + "SUBSTRING(CAST(MAX(`col1`) AS STRING), 1, 1024) AS max, "
+                        + "COUNT(1) * 4 AS data_size, NOW() "
+                        + "FROM `jdbc`.`mysql`.`test`", sql);
+            }
+        };
+
+        AnalysisInfoBuilder analysisInfoBuilder = new AnalysisInfoBuilder();
+        analysisInfoBuilder.setColName("col1");
+        analysisInfoBuilder.setJobType(AnalysisInfo.JobType.MANUAL);
+        analysisInfoBuilder.setExternalTableLevelTask(false);
+
+        JdbcAnalysisTask task = new JdbcAnalysisTask(analysisInfoBuilder.build());
+        task.col = new Column("col1", PrimitiveType.INT);
+        task.tbl = tableIf;
+        task.catalog = catalogIf;
+        task.db = databaseIf;
+
+        task.doExecute();
+    }
+}