deemoliu commented on code in PR #12392:
URL: https://github.com/apache/pinot/pull/12392#discussion_r1486770689
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pinot-common/src/main/java/org/apache/pinot/common/function/scalar/StringFunctions.java:
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@@ -570,6 +572,81 @@ public static String[] split(String input, String
delimiter, int limit) {
return StringUtils.splitByWholeSeparator(input, delimiter, limit);
}
+ /**
+ * @param input an input string for prefix strings generations.
+ * @param length the max length of the prefix strings for the string.
+ * @param regexChar the character for regex matching to be added to prefix
strings generated. e.g. '^'
Review Comment:
prefix can be ['a', 'ab', 'abc'] and it can also be ['^a', '^ab', '^abc']
suffix can be ['abc', 'bc', 'c'] and it can also be ['abc$', 'bc$', 'c$']
the regexChar is used for providing convenience for customer to match regex
expressions
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