[jira] [Created] (FLINK-18378) CatalogManager checks for CatalogTableImpl instead of CatalogTable

[Shang Yuanchun (Jira)]

Fabian Hueske created FLINK-18378:
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             Summary: CatalogManager checks for CatalogTableImpl instead of CatalogTable
                 Key: FLINK-18378
                 URL: https://issues.apache.org/jira/browse/FLINK-18378
             Project: Flink
          Issue Type: Bug
          Components: Table SQL / Planner
    Affects Versions: 1.11.0
            Reporter: Fabian Hueske


The {{CatalogManager}} checks for {{CatalogTableImpl}} instead of {{CatalogTable}} to decide whether to resolve the table schema. See https://github.com/apache/flink/blob/release-1.11/flink-table/flink-table-api-java/src/main/java/org/apache/flink/table/catalog/CatalogManager.java#L369

Resolving the table schema adjusts the type of fields which are referenced by watermarks, i.e., changes their type from {{TIMESTAMP(3)}} to {{TIMESTAMP(3) ROWTIME}}. If table schema is not properly resolved some queries involving time attributes will fail during type validation.

However, {{CatalogTableImpl}} is an internal implementation of the public {{CatalogTable}} interface. Hence, external {{Catalog}} implementations will not work with {{CatalogTableImpl}} but rather {{CatalogTable}} and hence might fail to work correctly with queries that involve event-time attributes.



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