JingsongLi commented on a change in pull request #17537:
URL: https://github.com/apache/flink/pull/17537#discussion_r737114021
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File path:
flink-table/flink-table-planner/src/main/java/org/apache/flink/table/planner/plan/nodes/exec/common/CommonExecTableSourceScan.java
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@@ -97,9 +104,40 @@ public DynamicTableSourceSpec getTableSourceSpec() {
return createInputFormatTransformation(env, inputFormat,
outputTypeInfo, operatorName);
} else if (provider instanceof SourceProvider) {
Source<RowData, ?, ?> source = ((SourceProvider)
provider).createSource();
- // TODO: Push down watermark strategy to source scan
- return env.fromSource(
- source, WatermarkStrategy.noWatermarks(),
operatorName, outputTypeInfo)
+ // don't use rowTypes from CatalogTable
+ // because the rowType number may be reduced by ProjectionPushDown
+ RowType sourceRowType = outputTypeInfo.toRowType();
+ SourceAbilityContext sourceAbilityContext =
+ new SourceAbilityContext(planner.getFlinkContext(),
sourceRowType);
+
+ WatermarkStrategy<RowData> watermarkStrategy = null;
+
+ if (tableSource instanceof SupportsWatermarkPushDown) {
Review comment:
Can we always push down watermark to new source? Is there a semantic or
implementation problem?
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