lincoln lee created FLINK-29138:
-----------------------------------
Summary: Project pushdown not work for lookup source
Key: FLINK-29138
URL: https://issues.apache.org/jira/browse/FLINK-29138
Project: Flink
Issue Type: Bug
Reporter: lincoln lee
Current tests: LookupJoinTest#testJoinTemporalTableWithProjectionPushDown
{code}
@Test
def testJoinTemporalTableWithProjectionPushDown(): Unit = {
val sql =
"""
|SELECT T.*, D.id
|FROM MyTable AS T
|JOIN LookupTable FOR SYSTEM_TIME AS OF T.proctime AS D
|ON T.a = D.id
""".stripMargin
util.verifyExecPlan(sql)
}
{code}
the optimized plan doesn't print the selected columns from lookup source, but
actually it didn't push the project into lookup source (still select all
columns from source), this is not as expected
{code}
<Resource name="optimized exec plan">
<![CDATA[
Calc(select=[a, b, c, PROCTIME_MATERIALIZE(proctime) AS proctime, rowtime, id])
+- LookupJoin(table=[default_catalog.default_database.LookupTable],
joinType=[InnerJoin], lookup=[id=a], select=[a, b, c, proctime, rowtime, id])
+- DataStreamScan(table=[[default_catalog, default_database, MyTable]],
fields=[a, b, c, proctime, rowtime])
]]>
</Resource>
{code}
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