hanyuzheng7 commented on code in PR #22917:
URL: https://github.com/apache/flink/pull/22917#discussion_r1247961308
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flink-table/flink-table-common/src/main/java/org/apache/flink/table/types/inference/strategies/SpecificTypeStrategies.java:
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@@ -58,8 +58,12 @@ public final class SpecificTypeStrategies {
/** See {@link ArrayTypeStrategy}. */
public static final TypeStrategy ARRAY = new ArrayTypeStrategy();
- /** See {@link ArrayElementOutputTypeStrategy}. */
- public static final TypeStrategy ARRAY_ELEMENT = new
ArrayElementOutputTypeStrategy();
+ /** Type strategy specific for array element. */
+ public static final TypeStrategy ARRAY_ELEMENT =
+ callContext ->
+ Optional.of(
Review Comment:
@liuyongvs
```
new Integer[] {1, 2})
DataTypes.ARRAY(DataTypes.INT().notNull()).notNull())
.testResult($("f15").arrayMax(), "ARRAY_MAX(f15)", 2, DataTypes.INT())
```
So at this time, you cannot set new Integer[] {1, 2}) to null do you? I try
it, it will report error.
So what I mean is if this cannot be null, why the output cannot be
DataTypes.INT().notNull(). because the input type is not null we have already
know it, if you set it null, it will report error, so does this process involve
run time?
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