BaseX-Talk November 2022

basex-talk@mailman.uni-konstanz.de

23 participants
18 discussions

Dynamic combination search on specific path in BaseX
by DK Singh 15 Nov '22

15 Nov '22

HI I want to perform combination (AND OR) search on the basis of the provided parameter by the user, where user will select the field name e.g.(title, isbn, author) and their value from front-end so here field name will be the parameter for the BaseX. Currently i am asking front-end person the generate below combination query ( (title = "United States" or isbn = "2345371242192") and author ="Jhon" ) Now the all parameter value will be compared to specific XPATH , like below. let $Author := 'David Hare' let $title := "United States " let $isbn:= '2345371242192 ' return db:open('test')/*[(( normalize-space(string-join((*:info/*:author)[1]/*:personname//text()) ) = $Author or $title = *:info/*:title ) and $isbn="*:info/isban")]/base-uri() In the above code XPATH is hardcoded, but I want it to concatenate on the fly once string query comes front-end then it will be passed to Basex . Is there any other way to achieve this? or how should i ask combinations query from front-end so that i could achieve this. Thanks Dharmendra Kumar Singh

2 4

How to store text files in a data base
by Hans-Juergen Rennau 13 Nov '22

13 Nov '22

Hello, I wonder what is the recommended way how to store text files in a database. What occurs to me is the use of db:put-value / db:get-value: Storage: db:put-value($db, $filePath ! file:read-text(.), $dbPath) Retrieval: db:get-value($db, $dbPath) Would you recommend a different approach, e.g. storing and retrieving as a binary? With kind regards,Hans-Jürgen

1 0

GUI doesn't quit on Mac
by Majewski, Steven Dennis (sdm7g) 09 Nov '22

09 Nov '22

I’ve been having a problem for a while where after attempting to quit the Mac GUI, it doesn’t actually exit and has to be force quit. I’m sorry I wasn’t able to track how this tracks with MacOS / JDK / BaseX updates and when it actually started happening. Wondering if anyone else has had this issue, and whether it’s Mac specific or JDK version specific. MacOS 12.6.1 but problem goes back at least to earlier 12.6 versions Openjdk from home-brew install — currently openjdk/19.0.1, but was happening on earlier versions. And the current and last several versions of BaseX — Steve M.

4 7

Reported memory usage in GUI with Store Module
by Tim Thompson 08 Nov '22

08 Nov '22

Hello, I've been experimenting with the new Store module, which seems very handy. I have a custom store that is about 2GB in size. In the GUI (BaseX 10.3 beta), when I try to load it into memory with store:read(), the reported memory usage appears to max out (with 32GB of available memory): Total Memory: 32 GB Reserved Memory: 32 GB Used Memory: 32 GB However, monitoring memory usage with htop shows a smaller increase in memory usage: from 5GB at baseline, it peaks around 15GB, then goes down to 9GB, all while the BaseX GUI appears to be frozen. After a couple of minutes, the store does load, but GUI performance seems to be degraded, and it continues to report max memory usage. Any thoughts? Tim -- Tim A. Thompson (he, him) Librarian for Applied Metadata Research Yale University Library www.linkedin.com/in/timathompson

2 1

basex client implementation
by Erik Peterson 06 Nov '22

06 Nov '22

The CLI basexclient uses the same client api as other clients found here yes? https://docs.basex.org/wiki/Clients from basexclient CLI >BINARY GET lib/example.jpg as expected, returns the jpg I PUT from there from my client app. However, the same command BINARY GET from my client app, using COMMAND {command} {result} {info} \00 does not return the jpg. The bytes going to the basex server, at least the command 'BINARY GET lib/example.jpg' part are identical in both cases.

3 4

Testing that a value is a UUID
by Graydon Saunders 04 Nov '22

04 Nov '22

Hello -- You can (I think) test if some attribute value is an RFC 4122 UUID by using a regular expression: let $regexp as xs:string := '^[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-5][0-9a-fA-F]{3}-[089abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}$' for $uuid in //@GUID let $value as xs:string := $uuid/string() where not(matches($value,$regexp)) return $value Is there a better way to do this? thanks! Graydon

4 4

Client protocol updated
by Ben Engbers 04 Nov '22

04 Nov '22

Hi, Thanks to the mail from Erik Peterson on the basex client implementation, I learned that the client protocol has been updated and that 'replace/store' have been renamed to 'put/putBinary'. In my RBaseX-client, I used the 'retrieve' command to read binary data. I can't remember where I found that 'retrieve' was used for retrieving binary data. But while implementing 'put/putBinary' I noticed that 'retrieve' is no longer accepted as command. I have added a remark on this to the Clients page. Ben Engbers PS. RBaseX is loaded on average 10 times a day. I have never had any feedback on this package so I don't know in howfar it is really used. Any feedback is welcome!

1 0

is this a bug?
by Rob Stapper 02 Nov '22

02 Nov '22

Hi, I stumbled upon this behavior. Is this a bug? I’m still using Basex version 9.7. Code[1]: let $e := <E>abc</E> update { replace value of node . with ./data() || "def" } return ( $e, $e/data() ) Result: <E>abcdef</E> abc Expecting: <E>abcdef</E> abcdef [1] attachment: “replace-value-of-bug.xq” Pleased to hear from you, Rob Stapper Sent from Mail for Windows -- This email has been checked for viruses by Avast antivirus software. www.avast.com

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BaseX-Talk November 2022