Github user clarkyzl commented on a diff in the pull request:
https://github.com/apache/flink/pull/3529#discussion_r105861507
--- Diff: flink-core/src/main/java/org/apache/flink/types/Row.java ---
@@ -66,10 +66,11 @@ public int getArity() {
* Gets the field at the specified position.
* @param pos The position of the field, 0-based.
* @return The field at the specified position.
- * @throws IndexOutOfBoundsException Thrown, if the position is
negative, or equal to, or larger than the number of fields.
+ * Return null if the position is equal to, or larger than the number
of fields.
+ * @throws IndexOutOfBoundsException Thrown, if the position is
negative.
*/
public Object getField(int pos) {
- return fields[pos];
+ return pos >= fields.length ? null : fields[pos];
--- End diff --
Hi @fhueske . Thank you for your comments. The overhead of `if`s are
additionally caused here. It may not be an efficient way. IMHO, The design of
`TableFunction` support arbitrary types of output Row. However, too many kinds
of `TableFunction`s may also confuse users. I will discover whether there is a
concise and efficient way.
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