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https://issues.apache.org/jira/browse/FLINK-39538?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ramin Gharib updated FLINK-39538:
---------------------------------
Description: (was: FROM_CHANGELOG used to be locked to row semantics.
With the conditional trait API introduced for TO_CHANGELOG, the input argument
now switches to set semantics when the call provides PARTITION BY:
{code:java}
SELECT * FROM FROM_CHANGELOG(
input => TABLE cdc_stream PARTITION BY id
){code}
The planner inserts an Exchange(hash[id]) so rows with the same key are
co-located in the same parallel operator instance. Without PARTITION BY,
behavior is unchanged: each row is processed independently with row semantics.
The runtime function is unaffected — only the trait declaration and the
resulting parallel execution layout change. )
> FROM_CHANGELOG: Flat stream with op codes → upsert stream
> ---------------------------------------------------------
>
> Key: FLINK-39538
> URL: https://issues.apache.org/jira/browse/FLINK-39538
> Project: Flink
> Issue Type: Sub-task
> Components: Table SQL / Planner
> Reporter: Ramin Gharib
> Priority: Major
>
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