twalthr commented on a change in pull request #15428:
URL: https://github.com/apache/flink/pull/15428#discussion_r604981686
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File path:
flink-table/flink-table-planner-blink/src/main/java/org/apache/flink/table/planner/sources/DynamicSourceUtils.java
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@@ -155,6 +245,117 @@ public static boolean isSourceChangeEventsDuplicate(
//
--------------------------------------------------------------------------------------------
+ /** Creates a specialized node for assigning watermarks. */
+ private static void pushWatermarkAssigner(FlinkRelBuilder relBuilder,
ResolvedSchema schema) {
+ final ExpressionConverter converter = new
ExpressionConverter(relBuilder);
+ final RelDataType inputRelDataType = relBuilder.peek().getRowType();
+
+ final WatermarkSpec watermarkSpec = schema.getWatermarkSpecs().get(0);
Review comment:
This is checked during schema resolution in
`org.apache.flink.table.catalog.DefaultSchemaResolver#resolveWatermarkSpecs`
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