walterddr commented on a change in pull request #7114:
URL: https://github.com/apache/pinot/pull/7114#discussion_r711206552
##########
File path:
pinot-common/src/main/java/org/apache/pinot/common/function/scalar/StringFunctions.java
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@@ -179,6 +180,48 @@ public static String rtrim(String input) {
return RTRIM.matcher(input).replaceAll("");
}
+ /**
+ * @see #StringFunctions#regexpExtract(String, String, int, String)
+ * @param value
+ * @param regexp
+ * @return the matched result.
+ */
+ @ScalarFunction
+ public static String regexpExtract(String value, String regexp) {
+ return regexpExtract(value, regexp, 0, "");
+ }
+
+ /**
+ * @see #StringFunctions#regexpExtract(String, String, int, String)
+ * @param value
+ * @param regexp
+ * @param group
+ * @return the matched result.
+ */
+ @ScalarFunction
+ public static String regexpExtract(String value, String regexp, int group) {
+ return regexpExtract(value, regexp, group, "");
+ }
+
+ /**
+ * Regular expression extract that accepts starting position and i-th
occurrence as argument.
Review comment:
```suggestion
* Regular expression that extract first matched substring.
```
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