[jira] [Assigned] (FLINK-40735) OVER window ordered by a non-time attribute fails for LAG and ARRAY_AGG when a row arrives out of order

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

     [ https://issues.apache.org/jira/browse/FLINK-40735?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Martijn Visser reassigned FLINK-40735:
--------------------------------------

    Assignee: sepuri sai krishna

> OVER window ordered by a non-time attribute fails for LAG and ARRAY_AGG when a row arrives out of order
> -------------------------------------------------------------------------------------------------------
>
>                 Key: FLINK-40735
>                 URL: https://issues.apache.org/jira/browse/FLINK-40735
>             Project: Flink
>          Issue Type: Bug
>          Components: Table SQL / Runtime
>    Affects Versions: 2.3.0, 2.2.1, 2.1.3
>            Reporter: sepuri sai krishna
>            Assignee: sepuri sai krishna
>            Priority: Major
>         Attachments: NonTimeOverRangeRepro.java, pom.xml
>
>
> In streaming mode, an {{OVER}} window ordered by a non-time attribute fails at runtime for
> {{LAG}}, {{ARRAY_AGG}}, {{COLLECT}} and {{PERCENTILE}} as soon as a row arrives that does
> not sort to the end of its partition.
> {code:sql}
> SELECT ord, LAG(v,1) OVER (PARTITION BY k ORDER BY ord)
> FROM (VALUES ('a',30,'p'),('a',20,'q'),('a',10,'r')) AS t(k,ord,v);
> {code}
> {noformat}
> java.lang.UnsupportedOperationException: Unmaterialized BinaryRawValueData cannot be compared.
>   at org.apache.flink.table.data.binary.BinaryRawValueData.equals(BinaryRawValueData.java:85)
>   at org.apache.flink.table.data.GenericRowData.equals(GenericRowData.java:229)
>   ...
> {noformat}
> Two triggers, both ordinary in a stream:
> * a row arriving out of order on the ordering column
> * two rows sharing the same ordering value
> A single row, or rows arriving in ascending order, both work.
> Affected: {{LAG}}, {{ARRAY_AGG}}, {{COLLECT}}, {{PERCENTILE}}.
> Unaffected on the same data: {{COUNT}}, {{SUM}}, {{AVG}}, {{MIN}}, {{MAX}}, {{FIRST_VALUE}},
> {{LAST_VALUE}}, {{LISTAGG}}, {{ROW_NUMBER}}, {{RANK}}, {{DENSE_RANK}}, {{VAR_POP}},
> {{STDDEV_POP}}.
> Also reproduces with a {{datagen}} source whose ordering column is a random INT, so the
> rows arrive unordered naturally rather than through {{VALUES}}:
> {code:sql}
> CREATE TABLE src (k STRING, ord INT, v STRING) WITH (
>   'connector'='datagen','number-of-rows'='20',
>   'fields.k.length'='1','fields.v.length'='2',
>   'fields.ord.min'='1','fields.ord.max'='1000');
> {code}
> Reproduced on 2.1.3, 2.2.1 and 2.3.0. On 2.0.0 the same query is rejected at plan time with
> {{OVER windows' ordering in stream mode must be defined on a time attribute}}.
> Reproducer attached.



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