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From "jingzhang (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (FLINK-6067) ProjectNode and FilterNode cannot merge in Batch TableAPI/SQL
Date Fri, 17 Mar 2017 07:13:41 GMT

     [ https://issues.apache.org/jira/browse/FLINK-6067?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

jingzhang updated FLINK-6067:
-----------------------------
    Description: 
{code}
    val table1 = tEnv.scan( "tb1")
    val table2 = tEnv.scan("tb2")
    val result = table2
        .where("d < 3")
        .select('d *2, 'e, 'g.upperCase())
        .unionAll(table1.select('a *2, 'b, 'c.upperCase()))
{code}
we run the above code in the Batch TableAPI/SQL, we would get the following optimizedPlan
{code}
DataSetUnion(union=[_c0, e, _c2])
DataSetCalc(select=[*(d, 2) AS _c0, e, UPPER(g) AS _c2])
DataSetCalc(select=[d, e, g], where=[<(d, 3)])
BatchTableSourceScan(table=[[tb2]], fields=[d, e, g])
DataSetCalc(select=[*(a, 2) AS _c0, b, UPPER(c) AS _c2])
BatchTableSourceScan(table=[[tb1]], fields=[a, b, c])
{code}
However, we run the above code in the Stream TableAPI/SQL, we would get the following optimizedPlan
{code}
DataStreamUnion(union=[_c0, e, _c2])
DataStreamCalc(select=[*(d, 2) AS _c0, e, UPPER(g) AS _c2], where=[<(d, 3)])
StreamTableSourceScan(table=[[tb2]], fields=[d, e, g])
DataStreamCalc(select=[*(a, 2) AS _c0, b, UPPER(c) AS _c2])
StreamTableSourceScan(table=[[tb1]], fields=[a, b, c])
{code}

we can find that in the batch tableAPI, the project and filterNode don't merge into a single
node. However, in the Stream tableAPI, these two nodes could merge into one.

  was:
{code}
    val table1 = tEnv.scan( "tb1")
    val table2 = tEnv.scan("tb2")
    val result = table2
        .where("d < 3")
        .select('d *2, 'e, 'g.upperCase())
        .unionAll(table1.select('a *2, 'b, 'c.upperCase()))
{code}
we run the above code in the BatchTableAPI, we would get the following optimizedPlan
{code}
DataSetUnion(union=[_c0, e, _c2])
DataSetCalc(select=[*(d, 2) AS _c0, e, UPPER(g) AS _c2])
DataSetCalc(select=[d, e, g], where=[<(d, 3)])
BatchTableSourceScan(table=[[tb2]], fields=[d, e, g])
DataSetCalc(select=[*(a, 2) AS _c0, b, UPPER(c) AS _c2])
BatchTableSourceScan(table=[[tb1]], fields=[a, b, c])
{code}
However, we run the above code in the Stream TableAPI, we would get the following optimizedPlan
{code}
DataStreamUnion(union=[_c0, e, _c2])
DataStreamCalc(select=[*(d, 2) AS _c0, e, UPPER(g) AS _c2], where=[<(d, 3)])
StreamTableSourceScan(table=[[tb2]], fields=[d, e, g])
DataStreamCalc(select=[*(a, 2) AS _c0, b, UPPER(c) AS _c2])
StreamTableSourceScan(table=[[tb1]], fields=[a, b, c])
{code}

we can find that in the batch tableAPI, the project and filterNode don't merge into a single
node. However, in the Stream tableAPI, these two nodes could merge into one.


> ProjectNode and FilterNode cannot merge in Batch TableAPI/SQL
> -------------------------------------------------------------
>
>                 Key: FLINK-6067
>                 URL: https://issues.apache.org/jira/browse/FLINK-6067
>             Project: Flink
>          Issue Type: Bug
>          Components: Table API & SQL
>            Reporter: jingzhang
>            Assignee: jingzhang
>
> {code}
>     val table1 = tEnv.scan( "tb1")
>     val table2 = tEnv.scan("tb2")
>     val result = table2
>         .where("d < 3")
>         .select('d *2, 'e, 'g.upperCase())
>         .unionAll(table1.select('a *2, 'b, 'c.upperCase()))
> {code}
> we run the above code in the Batch TableAPI/SQL, we would get the following optimizedPlan
> {code}
> DataSetUnion(union=[_c0, e, _c2])
> DataSetCalc(select=[*(d, 2) AS _c0, e, UPPER(g) AS _c2])
> DataSetCalc(select=[d, e, g], where=[<(d, 3)])
> BatchTableSourceScan(table=[[tb2]], fields=[d, e, g])
> DataSetCalc(select=[*(a, 2) AS _c0, b, UPPER(c) AS _c2])
> BatchTableSourceScan(table=[[tb1]], fields=[a, b, c])
> {code}
> However, we run the above code in the Stream TableAPI/SQL, we would get the following
optimizedPlan
> {code}
> DataStreamUnion(union=[_c0, e, _c2])
> DataStreamCalc(select=[*(d, 2) AS _c0, e, UPPER(g) AS _c2], where=[<(d, 3)])
> StreamTableSourceScan(table=[[tb2]], fields=[d, e, g])
> DataStreamCalc(select=[*(a, 2) AS _c0, b, UPPER(c) AS _c2])
> StreamTableSourceScan(table=[[tb1]], fields=[a, b, c])
> {code}
> we can find that in the batch tableAPI, the project and filterNode don't merge into a
single node. However, in the Stream tableAPI, these two nodes could merge into one.



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