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Posted to dev@flink.apache.org by "Timo Walther (JIRA)" <ji...@apache.org> on 2019/06/21 07:33:00 UTC
[jira] [Created] (FLINK-12924) Introduce basic type inference
interfaces
Timo Walther created FLINK-12924:
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Summary: Introduce basic type inference interfaces
Key: FLINK-12924
URL: https://issues.apache.org/jira/browse/FLINK-12924
Project: Flink
Issue Type: Sub-task
Components: Table SQL / API
Reporter: Timo Walther
Assignee: Timo Walther
This issue introduces basic interfaces for performing type inference. It includes validation of input types and deduction of accumulator or return types. Argument type inference (i.e. deducing a type for \{{NULL}}) will be introduced in a later step. The interfaces replace the need for \{{PlannerExpression}}.
A rough design document can be found here but it needs some update. Introduction of annotations and basic type extraction will come later: [https://docs.google.com/document/d/1RM_-XvD25AldUOl7xRSvA3sascWBa1-Jze3i5mvb7WU/edit#heading=h.kwyjplavecx4
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