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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Work logged] (BEAM-5050) [SQL] NULLs are aggregated incorrectly
Date Wed, 01 Aug 2018 09:00:05 GMT

     [ https://issues.apache.org/jira/browse/BEAM-5050?focusedWorklogId=129625&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-129625
]

ASF GitHub Bot logged work on BEAM-5050:
----------------------------------------

                Author: ASF GitHub Bot
            Created on: 01/Aug/18 09:00
            Start Date: 01/Aug/18 09:00
    Worklog Time Spent: 10m 
      Work Description: kanterov commented on a change in pull request #6108: [BEAM-5050]
[SQL] Fix aggregation of nulls
URL: https://github.com/apache/beam/pull/6108#discussion_r206803788
 
 

 ##########
 File path: sdks/java/extensions/sql/src/test/java/org/apache/beam/sdk/extensions/sql/BeamSqlDslAggregationNullableTest.java
 ##########
 @@ -0,0 +1,156 @@
+/*
+ * 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.beam.sdk.extensions.sql;
+
+import static org.apache.beam.sdk.extensions.sql.utils.RowAsserts.matchesScalar;
+
+import java.util.List;
+import org.apache.beam.sdk.schemas.Schema;
+import org.apache.beam.sdk.testing.PAssert;
+import org.apache.beam.sdk.testing.TestPipeline;
+import org.apache.beam.sdk.transforms.Create;
+import org.apache.beam.sdk.values.PBegin;
+import org.apache.beam.sdk.values.PCollection;
+import org.apache.beam.sdk.values.Row;
+import org.junit.Before;
+import org.junit.Ignore;
+import org.junit.Rule;
+import org.junit.Test;
+
+/** Integration tests for aggregation nullable columns. */
+public class BeamSqlDslAggregationNullableTest {
+
+  @Rule public TestPipeline pipeline = TestPipeline.create();
+
+  private PCollection<Row> boundedInput;
+
+  @Before
+  public void setUp() {
+    Schema schema =
+        Schema.builder()
+            .addNullableField("f_int1", Schema.FieldType.INT32)
+            .addNullableField("f_int2", Schema.FieldType.INT32)
+            .addInt32Field("f_int3")
+            .build();
+
+    List<Row> rows =
+        TestUtils.RowsBuilder.of(schema)
+            .addRows(1, 5, 1)
+            .addRows(null, 1, 1)
+            .addRows(2, 1, 1)
+            .addRows(null, 1, 1)
+            .addRows(null, null, 1)
+            .addRows(null, null, 1)
+            .addRows(3, 2, 1)
+            .getRows();
+
+    boundedInput = PBegin.in(pipeline).apply(Create.of(rows).withCoder(schema.getRowCoder()));
+  }
+
+  @Test
+  public void testCount() {
+    String sql = "SELECT COUNT(f_int1) FROM PCOLLECTION GROUP BY f_int3";
+
+    PAssert.that(boundedInput.apply(SqlTransform.query(sql))).satisfies(matchesScalar(3L));
+
+    pipeline.run();
+  }
+
+  @Test
+  public void testCountStar() {
+    String sql = "SELECT COUNT(*) FROM PCOLLECTION GROUP BY f_int3";
+
+    PAssert.that(boundedInput.apply(SqlTransform.query(sql))).satisfies(matchesScalar(7L));
+
+    pipeline.run();
+  }
+
+  @Test
+  public void testCountThroughSum() {
+    String sql =
+        "SELECT SUM(CASE f_int1 IS NOT NULL WHEN TRUE THEN 1 ELSE 0 END) "
+            + "FROM PCOLLECTION GROUP BY f_int3";
+
+    PAssert.that(boundedInput.apply(SqlTransform.query(sql))).satisfies(matchesScalar(3));
+
+    pipeline.run();
+  }
+
+  @Test
+  public void testCountNulls() {
+    String sql =
+        "SELECT SUM(CASE f_int1 IS NULL WHEN TRUE THEN 1 ELSE 0 END) "
+            + "FROM PCOLLECTION GROUP BY f_int3";
+
+    PAssert.that(boundedInput.apply(SqlTransform.query(sql))).satisfies(matchesScalar(4));
+
+    pipeline.run();
+  }
+
+  @Test
+  public void testSum() {
+    String sql = "SELECT SUM(f_int1) FROM PCOLLECTION GROUP BY f_int3";
+
+    PAssert.that(boundedInput.apply(SqlTransform.query(sql))).satisfies(matchesScalar(6));
+
+    pipeline.run();
+  }
+
+  @Test
+  public void testAvg() {
+    String sql = "SELECT AVG(f_int1) FROM PCOLLECTION GROUP BY f_int3";
+
+    PAssert.that(boundedInput.apply(SqlTransform.query(sql))).satisfies(matchesScalar(2));
+
+    pipeline.run();
+  }
+
+  @Ignore
+  // FIXME java.lang.IllegalArgumentException: Field EXPR$0 is not nullable
 
 Review comment:
   Created a ticket: https://issues.apache.org/jira/browse/BEAM-5056

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Issue Time Tracking
-------------------

            Worklog Id:     (was: 129625)
            Time Spent: 10m
    Remaining Estimate: 0h

> [SQL] NULLs are aggregated incorrectly
> --------------------------------------
>
>                 Key: BEAM-5050
>                 URL: https://issues.apache.org/jira/browse/BEAM-5050
>             Project: Beam
>          Issue Type: Bug
>          Components: dsl-sql
>            Reporter: Anton Kedin
>            Priority: Major
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> For example, COUNT(field) should not count records with NULL field. We also should handle
and test on other aggregation functions (like AVG, SUM, MIN, MAX, VAR_POP, VAR_SAMP, etc.)



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