Artsem Semianenka created FLINK-12337:
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Summary: [TableSQL/Planner] InsertInto method should configure TableSink
Key: FLINK-12337
URL:
https://issues.apache.org/jira/browse/FLINK-12337 Project: Flink
Issue Type: New Feature
Reporter: Artsem Semianenka
Assignee: Artsem Semianenka
In the current implementation of TableEnvironment the *insertInto(..)* method check is the source Table Schema exactly the same as sink schema otherwise, it throws a ValidationException.
Let's imagine the following setup:
I have a sink wich produce the Row with fields A and B. (for example Kafka)
By the other hand, I have an External Catalog which produce the sink for Database which support UPSERT (for example PostgreSQL or Cloudera Kudu in my case) with schema of fields :
* A _required_
* B _required_
* C _+optional+_
I want to UPSERT only A and B fields in the sink. But as far as sink was created from the external catalog it knows only the schema of the table. (fields A B C) and when I create the query like this I got the ValidationException.
{code:java}
INSERT INTO sink.table
SELECT A, B FROM src.topic{code}
I propose to validate in *insertInto(..)* method does the source schema is the subset of sink schema and if yes call the configure(..) method for the sink. In this case, the sink can adapt for source schema if it is possible.
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