siddharthteotia commented on code in PR #9123:
URL: https://github.com/apache/pinot/pull/9123#discussion_r935881001
##########
pinot-common/src/main/java/org/apache/pinot/common/function/scalar/StringFunctions.java:
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@@ -560,4 +560,116 @@ public static String decodeUrl(String input)
throws UnsupportedEncodingException {
return URLDecoder.decode(input, StandardCharsets.UTF_8.toString());
}
+
+ /**
+ * Replace a regular expression pattern. If matchStr is not found, inputStr
will be returned. By default, all
+ * occurences of match pattern in the input string will be replaced. Default
matching pattern is case sensitive.
+ *
+ * @param inputStr Input string to apply the regexpReplace
+ * @param matchStr Regexp or string to match against inputStr
+ * @param replaceStr Regexp or string to replace if matchStr is found
+ * @param startPos Index of inputStr from where matching should start.
Default is 0.
+ * @param occurence Controls which occurence of the matched pattern must be
replaced. Counting starts at 0. Default
+ * is -1
+ * @param flag Single character flag that controls how the regex finds
matches in inputStr. If an incorrect flag is
+ * specified, the function applies default case sensitive match.
Only one flag can be specified. Supported
+ * flags:
+ * i -> Case insensitive
+ * m -> Treats the string to match as multiple lines
+ * x -> Add comments to the regular expression
+ * @return replaced input string
+ */
+ @ScalarFunction
+ public static String regexpReplace(String inputStr, String matchStr, String
replaceStr, int startPos,
+ int occurence, String flag) {
+ Integer patternFlag;
+ switch (flag) {
+ case "i":
+ patternFlag = Pattern.CASE_INSENSITIVE;
+ break;
+ case "m":
+ patternFlag = Pattern.MULTILINE;
+ break;
+ case "x":
+ patternFlag = Pattern.COMMENTS;
Review Comment:
Suggest not handling m and x now. We can add them later and keep it simple
for now
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