Hi 孙志禹, I think the text is referring to the javadoc for the Matcher class in java <https://docs.oracle.com/javase/8/docs/api/java/util/regex/Matcher.html>.
I added a lkink on https://cwiki.apache.org/confluence/display/Hive/LanguageManual+UDF which may have been the page you meant. -Andrew On Thu, Oct 19, 2017 at 5:25 AM, 孙志禹 <anci_...@yahoo.com> wrote: > In the link https://cwiki.apache.org/confluence/display/Hive/ > LanguageManual+Select where there is an explanation of the function > *regexp_extract* (in the picture below), there is a reference to the html > *docs/api/java/util/regex/Matcher.html > *which can not be opened directly. It seems something wrong, and if it > isn't, I want to ask for the right way to open that html. > Thanks. > [image: Inline image] >
