[jira] [Created] (FLINK-30977) flink tumbling window stream converting to pandas dataframe not work

["Joekwal (Jira)" <ji...@apache.org>]

Joekwal created FLINK-30977:
-------------------------------

             Summary: flink tumbling window stream converting to pandas dataframe not work
                 Key: FLINK-30977
                 URL: https://issues.apache.org/jira/browse/FLINK-30977
             Project: Flink
          Issue Type: Bug
         Environment: pyflink1.15.2
            Reporter: Joekwal


I want to know if tumbling window supported to convert to pandas?
```
code... #create env

kafka_src = """
CREATE TABLE if not exists `kafka_src` (
...
`event_time` as CAST(`end_time` as TIMESTAMP(3)),
WATERMARK FOR event_time as event_time - INTERVAL '5' SECOND
)
with (
'connector' = 'kafka',
'topic' = 'topic',
'properties.bootstrap.servers' = '***',
'properties.group.id' = '***',
'scan.startup.mode' = 'earliest-offset',
'value.format' = 'debezium-json'
);
"""    
t_env.execute_sql(kafka_src)

table = st_env.sql_query("SELECT columns,`event_time`  \
    FROM TABLE(TUMBLE(TABLE table_name, DESCRIPTOR(event_time), INTERVAL '1' MINUTES))")

# table.execute().print()  #could print the result
df = table.to_pandas()

#schema is correct!
schema = DataTypes.ROW([DataTypes.FIELD("column1", DataTypes.STRING()),
                        .......
                            ])

table = st_env.from_pandas(df,schema=schema)

st_env.create_temporary_view("view_table",table)

st_env.sql_query("select * from view_table").execute().print() # Not work!Can't print the result

```
Tumbling window stream from kafka source convert to pandas dataframe and it can't print the result.The schema is right.I have tested in another job with using batch stream from jdbc source.It can print the result.The only different thing is the input stream.As doc mentioned, the bounded stream is supported to convert to pandas.So what could have gone wrong?



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