wuchong commented on a change in pull request #11387:
[FLINK-16343][table-planner-blink] Improve exception message when reading an
unbounded source in batch mode
URL: https://github.com/apache/flink/pull/11387#discussion_r391499339
##########
File path:
flink-table/flink-table-planner-blink/src/main/scala/org/apache/flink/table/planner/plan/schema/CatalogSourceTable.scala
##########
@@ -164,10 +164,21 @@ class CatalogSourceTable[T](
} else {
TableFactoryUtil.findAndCreateTableSource(context)
}
+
if (!tableSource.isInstanceOf[StreamTableSource[_]]) {
throw new TableException("Catalog tables support only "
+ "StreamTableSource and InputFormatTableSource")
}
+
+ // validate TableSource when it is in batch mode
+ if (!schemaTable.isStreamingMode) {
Review comment:
My initial thought is "fail-fast", throw the exception at ealier stage, just
like the above validation which only allows `StreamTableSource` and
`InputFormatTableSource`.
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