dawidwys commented on a change in pull request #8781:
[FLINK-12874][table-common] Improve the semantics of zero length strings
URL: https://github.com/apache/flink/pull/8781#discussion_r295162812
##########
File path:
flink-table/flink-table-common/src/main/java/org/apache/flink/table/types/logical/BinaryType.java
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@@ -91,9 +92,11 @@ private BinaryType(int length, boolean isNullable) {
* For consistent behavior, the same logic applies to binary strings.
*
* <p>This method enables this special kind of binary string.
+ *
+ * <p>Zero-length binary strings have no serializable string
representation.
*/
public static BinaryType ofEmptyLiteral() {
- return new BinaryType(EMPTY_LITERAL_LENGTH, false);
+ return new BinaryType(EMPTY_LITERAL_LENGTH, true);
Review comment:
Is it possible to create a nullable empty literal? I think empty string
literals by the contract of our API will always be non null.
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