Cai Liuyang created FLINK-38192:
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Summary: Improve DynamicSourceUtils exception msg
Key: FLINK-38192
URL: https://issues.apache.org/jira/browse/FLINK-38192
Project: Flink
Issue Type: Improvement
Components: Table SQL / Planner
Reporter: Cai Liuyang
If DynamicTableSource doesn't impl the interface of SupportsReadingMetadata, it
will throw an exception with msg like: "Table 'xxx' declares metadata columns,
but the underlying DynamicTableSource doesn't implement the
SupportsReadingMetadata interface. Therefore, metadata cannot be read from the
given source. "，see
code：[DynamicSourceUtils#validateAndApplyMetadata|https://github.com/apache/flink/blob/master/flink-table/flink-table-planner/src/main/java/org/apache/flink/table/planner/connectors/DynamicSourceUtils.java#L442]
maybe we can print DynamicTableSource's real class name rather than
DynamicTableSource to provide more information
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