Syntax-checker

On Thu, Feb 17, 2022 at 11:32 AM Ben Engbers <Ben.Engbers at be-logical.nl> wrote: > > Hi, > > After I had formulated the query in Basex-GUI, I tried to execute the > same multi-line query in R/RbaseX. Nada ;-( > In R, one can use the paste function to concatenate strings. I use this > function to build a string which is passed to the RbaseX-client. > Example: > Stmt_1 <- "for $i in 1 to 2 return $i" => OK > Stmt_2 <- paste0("for $i in 1 to 2", => ERROR > "return $i") > It took 2 days of debugging before I found the error. Stmt_2 is > concatenated to "for $i in 1 to 2return $i" and it is clear that this > can't be executed. Instead of using the "paste0"-function I should have > used "paste" which introdus a space between the strings to be > concatenated. This works fine. > > My problem is that the server/my client does not give an error-message. > And this leads me to following question: > It would be helpfull if the syntax for the XQuery statement was checked > before sending to the server. Where in the BaseX sources can I find the > code for XQuery checking? Is it possible to translate tist code into R > or is that way to difficult? > > Ben Engbers

Op 17-02-2022 om 14:38 schreef Christian Grün: > Hi Ben, > > An XQuery string is parsed by the QueryParser class [1]. It’s the > largest Java class in the project, so it might take some time to get > it reimplemented in R. > > Groetjes, > Christian

> > PS. I've nearly completed a text that I mean to present to R-bloggers > and in which I present my client. Would you care giving it a look?

On 2/17/2022 11:17 AM, Ben Engbers wrote: > Hi Christian > > I know that the R community is still looking for a XQuery tool. I > won't say that RBaseX is the best but for the moment it is the best > option I know of ;-). And bugs are becoming more and more rare (and > difficult to resolve ;-(). > Even after my retirement I spent a lot of time programming and working > on the client gives me great fun. And introducing a syntax-checker > would improve the usability. > I'll take a look at het QueryParser class and see if I can manage to > implement it in R. > > Gruesse, > > Ben > > PS. I've nearly completed a text that I mean to present to R-bloggers > and in which I present my client. Would you care giving it a look? > > Op 17-02-2022 om 14:38 schreef Christian Grün: >> Hi Ben, >> >> An XQuery string is parsed by the QueryParser class [1]. It’s the >> largest Java class in the project, so it might take some time to get >> it reimplemented in R. >> >> Groetjes, >> Christian >