tanclary commented on code in PR #3338:
URL: https://github.com/apache/calcite/pull/3338#discussion_r1295097215
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core/src/main/java/org/apache/calcite/runtime/SqlFunctions.java:
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@@ -345,6 +346,17 @@ public static String sha512(ByteString string) {
return DigestUtils.sha512Hex(string.getBytes());
}
+ /** SQL {@code REGEXP_CONTAINS(value, regexp)} function.
+ * Throws a runtime exception for invalid regular expressions.*/
+ public static boolean regexpContains(String value, String regex) {
+ try {
+ Pattern regexp = Pattern.compile(regex);
Review Comment:
If you're going to stick with Java library, I think it would help to add a
comment here or elsewhere linking to the case where that decision was made for
future users/devs
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