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https://issues.apache.org/jira/browse/FLINK-16343?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17057569#comment-17057569
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Jark Wu commented on FLINK-16343:
---------------------------------

After some discussion with Kurt, this happens when querying on an unbounded 
source in batch mode. The exception is as following:

{code:java}
org.apache.flink.table.api.TableException: Cannot generate a valid execution 
plan for the given query: 

FlinkLogicalCalc(select=[ts, a, b], where=[>(a, 1)])
+- FlinkLogicalTableSourceScan(table=[[default_catalog, default_database, src, 
source: [CollectionTableSource(ts, a, b)]]], fields=[ts, a, b])
{code}


> Failed to read a table with watermark in batch mode
> ---------------------------------------------------
>
>                 Key: FLINK-16343
>                 URL: https://issues.apache.org/jira/browse/FLINK-16343
>             Project: Flink
>          Issue Type: Bug
>          Components: Table SQL / Planner
>    Affects Versions: 1.10.0
>            Reporter: Kurt Young
>            Assignee: Jark Wu
>            Priority: Major
>             Fix For: 1.10.1, 1.11.0
>
>
> We can just ignore watermark in batch mode. 
> cc [~jark]



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