slinkydeveloper commented on pull request #17662:
URL: https://github.com/apache/flink/pull/17662#issuecomment-960531015
@Airblader I can try, but it requires to default implement both methods, eg:
```
Index:
flink-table/flink-table-common/src/main/java/org/apache/flink/table/connector/source/abilities/SupportsProjectionPushDown.java
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
diff --git
a/flink-table/flink-table-common/src/main/java/org/apache/flink/table/connector/source/abilities/SupportsProjectionPushDown.java
b/flink-table/flink-table-common/src/main/java/org/apache/flink/table/connector/source/abilities/SupportsProjectionPushDown.java
---
a/flink-table/flink-table-common/src/main/java/org/apache/flink/table/connector/source/abilities/SupportsProjectionPushDown.java
(revision 5379526a2cdfe6087625e1bfcba913c818f3c732)
+++
b/flink-table/flink-table-common/src/main/java/org/apache/flink/table/connector/source/abilities/SupportsProjectionPushDown.java
(date 1636012762215)
@@ -52,6 +52,10 @@
/** Returns whether this source supports nested projection. */
boolean supportsNestedProjection();
+ /** @deprecated You should implement {@link #applyProjection(int[][],
DataType)} */
+ @Deprecated
+ default void applyProjection(int[][] projectedFields) {}
+
/**
* Provides the field index paths that should be used for a projection.
The indices are 0-based
* and support fields within (possibly nested) structures if this is
enabled via {@link
@@ -73,5 +77,7 @@
* produced data
* @param producedDataType the final output type of the source, with
the projection applied
*/
- void applyProjection(int[][] projectedFields, DataType
producedDataType);
+ default void applyProjection(int[][] projectedFields, DataType
producedDataType) {
+ applyProjection(projectedFields);
+ }
}
```
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