davidradl commented on code in PR #28111:
URL: https://github.com/apache/flink/pull/28111#discussion_r3186988395
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flink-table/flink-table-api-java/src/main/java/org/apache/flink/table/api/internal/BaseExpressions.java:
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@@ -1493,6 +1495,28 @@ public OutType inetNtoa() {
return toApiSpecificExpression(unresolvedCall(INET_NTOA, toExpr()));
}
+ /**
+ * Returns {@code true} if the input bytes form a well-formed UTF-8
sequence, {@code false}
+ * otherwise. Returns {@code null} if the input is {@code null}.
+ *
+ * <p>Specifically rejects: truncated multi-byte sequences (missing
continuation bytes),
+ * "overlong" encodings (using more bytes than necessary for the code
point), code points above
+ * the Unicode maximum U+10FFFF, and UTF-16 surrogate values U+D800-U+DFFF
(which have no UTF-8
+ * representation).
+ */
+ public OutType isValidUtf8() {
Review Comment:
I was expecting. boolean return type here
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