Hi Devs, Another question about the string functions.
The example code on the http://asterixdb.ics.uci.edu/documentation/aql/functions.html#StringFunctions <http://asterixdb.ics.uci.edu/documentation/aql/functions.html#StringFunctions> shows that these two function are suppose to be called after contains(). I wonder what is the expected behavior if the they can't find the match pattern? The current result is confusing. e.g. let $x := "substring" return [ substring-before($x, "subx"), substring-after($x, “subx”)] it will return [ [ "subst", "" ] ] Should we always return an empty string in such case, or throw an exception like “you shall filter the result by contain() first” ? IMHO, I’d like to return a null string. Any opinion? Best, Jianfeng Jia PhD Candidate of Computer Science University of California, Irvine
