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From fhueske <...@git.apache.org>
Subject [GitHub] flink pull request #3033: [FLINK-5256] Extend DataSetSingleRowJoin to suppor...
Date Tue, 17 Jan 2017 14:39:03 GMT
Github user fhueske commented on a diff in the pull request:

    https://github.com/apache/flink/pull/3033#discussion_r96420458
  
    --- Diff: flink-libraries/flink-table/src/test/scala/org/apache/flink/table/api/scala/batch/sql/DataSetSingleRowJoinTest.scala
---
    @@ -192,4 +192,145 @@ class SingleRowJoinTest extends TableTestBase {
     
         util.verifySql(query, expected)
       }
    +
    +  @Test
    +  def testSingleRowJoinLeftOuterJoin(): Unit = {
    +    val util = batchTestUtil()
    +    util.addTable[(Int, Int)]("A", 'a1, 'a2)
    +    util.addTable[(Int, Int)]("B", 'b1, 'b2)
    +
    +    val queryLeftJoin =
    +      "SELECT a2 FROM A " +
    +        "LEFT JOIN " +
    +        "(SELECT COUNT(*) AS cnt FROM B) " +
    +        "AS x " +
    +        "ON a1 < cnt"
    +
    +    val expected =
    +      unaryNode(
    +        "DataSetCalc",
    +        unaryNode(
    +          "DataSetSingleRowJoin",
    +          batchTableNode(0),
    +          term("where", "<(a1, cnt)"),
    +          term("join", "a1", "a2", "cnt"),
    +          term("joinType", "NestedLoopJoin")
    +        ),
    +        term("select", "a2")
    +      ) + "\n" +
    +        unaryNode(
    +          "DataSetAggregate",
    +          unaryNode(
    +            "DataSetUnion",
    +            unaryNode(
    +              "DataSetValues",
    +              unaryNode(
    +                "DataSetCalc",
    +                batchTableNode(1),
    +                term("select", "0 AS $f0")),
    +              tuples(List(null)), term("values", "$f0")
    +            ),
    +            term("union", "$f0")
    +          ),
    +          term("select", "COUNT(*) AS cnt")
    +        )
    +
    +    util.verifySql(queryLeftJoin, expected)
    +  }
    +
    +  @Test
    +  def testSingleRowJoinRightOuterJoin(): Unit = {
    +    val util = batchTestUtil()
    +    util.addTable[(Int, Int)]("A", 'a1, 'a2)
    +    util.addTable[(Int, Int)]("B", 'b1, 'b2)
    +
    +    val queryRightJoin =
    +      "SELECT a2 FROM A " +
    +        "RIGHT JOIN " +
    +        "(SELECT COUNT(*) AS cnt FROM B) " +
    +        "AS x " +
    +        "ON a1 < cnt"
    +
    +    val expected =
    +      unaryNode(
    +        "DataSetCalc",
    +        unaryNode(
    +          "DataSetSingleRowJoin",
    +          batchTableNode(0),
    +          term("where", "<(a1, cnt)"),
    +          term("join", "a1", "a2", "cnt"),
    +          term("joinType", "NestedLoopJoin")
    +        ),
    +        term("select", "a2")
    +      ) + "\n" +
    +        unaryNode(
    +          "DataSetAggregate",
    +          unaryNode(
    +            "DataSetUnion",
    +            unaryNode(
    +              "DataSetValues",
    +              unaryNode(
    +                "DataSetCalc",
    +                batchTableNode(1),
    +                term("select", "0 AS $f0")),
    +              tuples(List(null)), term("values", "$f0")
    +            ),
    +            term("union", "$f0")
    +          ),
    +          term("select", "COUNT(*) AS cnt")
    +        )
    +
    +    util.verifySql(queryRightJoin, expected)
    +  }
    +
    +  @Test
    +  def testSingleRowJoinInnerJoin(): Unit = {
    +    val util = batchTestUtil()
    +    util.addTable[(Int, Int)]("A", 'a1, 'a2)
    +    val query =
    +      "SELECT a2, sum(a1) " +
    +        "FROM A GROUP BY a2 " +
    --- End diff --
    
    Please add a break line after `A` to make the query easier to parse.


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