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https://issues.apache.org/jira/browse/FLINK-12996?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dawid Wysakowicz updated FLINK-12996:
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Fix Version/s: 1.9.0
> Add predefined type validators, strategies, and transformations
> ---------------------------------------------------------------
>
> Key: FLINK-12996
> URL: https://issues.apache.org/jira/browse/FLINK-12996
> Project: Flink
> Issue Type: Sub-task
> Components: Table SQL / API
> Reporter: Timo Walther
> Assignee: Timo Walther
> Priority: Major
> Fix For: 1.9.0
>
>
> FLINK-12924 introduced new interfaces for performing type inference. We need
> a set of predefined type validators, strategies, and transformations
> implemented with the new interfaces in order to represent the old type
> checking logic. Those interfaces can be inspired by Calcite's
> {{org.apache.calcite.sql.type.ReturnTypes}},
> {{org.apache.calcite.sql.type.OperandTypes}}, and
> {{org.apache.calcite.sql.type.SqlTypeTransforms}}.
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