BaseX-Talk

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9 participants
5256 discussions

Optimization issue? - maps and count
by Johannes Echterhoff 06 Dec '19

06 Dec '19

All, The following query: let $lookupSequence := ('a','b') let $map := map {'c': 'x'} let $mapLookupEvaluation := $map?($lookupSequence) return ( 'Evaluation of the map lookup is: ' || string-join($mapLookupEvaluation,", "), 'count($mapLookupEvaluation) is: ' || count($mapLookupEvaluation) ) Results in: Evaluation of the map lookup is: count($mapLookupEvaluation) is: 2 I would have expected 0 instead of 2. Am I missing something? Best regards, Johannes

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Issue with years-from-duration!?
by France Baril 06 Dec '19

06 Dec '19

Hi, The following function returns P4511D: 0 but I expect P4511D: 12 Bug or bad usage? let $d1 := xs:date('2007-07-31') > let $d2 := xs:date('2019-12-06') > let $duration := $d2 - $d1 > let $years := years-from-duration($duration) > return $duration || ': ' || $years -- France Baril Architecte documentaire / Documentation architect france.baril(a)architextus.com

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BaseX 9.3: The Winter Edition; {position()>1] vs. [./position()>1
by Alexander Witzigmann 05 Dec '19

05 Dec '19

the results of equivalent semantics: e.g. //row[position()>1] is no more equal to in latest 9.3 release to //row[./position()>1] the later results in not correct result. Alex

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WG: Anführungszeichen bei der Serialisierung
by benjamin.tobler＠sbb.ch 05 Dec '19

05 Dec '19

Guten Tag Ich möchte ein xml zu einem csv file wandeln. Dazu verwende ich die serialize function von BaseX. Um die Strings der einzelnen Felder würde ich gerne Anführungszeichen hinzufügen. Dazu verwende ich die Option 'quotes' : 'yes'. Leider funktioniert dies nicht. Ich habe Ihnen einen Beispielcode angehängt. Dieser generiert die Ausgabe: John;Travolta. Ich hätte aber gerne die Ausgabe: "John";"Travolta". Gibt es diese Möglichkeit? Vielen Dank für Ihre Hilfe! Lieber Grüsse Benjamin Tobler

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Reg : Collection Performence
by chandra Sekhar 04 Dec '19

04 Dec '19

Dear Basex Team, We are using basex7.9,here we are facing performance issue when we are trying to add XML documents to collection database. *scenario *: We are adding nearly one lakh xml documents to the collection,In my application we should run xquery on one lakh xmls,that reason we are adding xmls to same collection,but total xml size also very less. In this situation my our collection server taking more time to add documents to collection database. *one lakh xml size *: 4GB *Please suggest any option to improve performance* Regards, Chandrasekhar

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Join
by Giuseppe G. A. Celano 29 Nov '19

29 Nov '19

Hi, I have the following query: count( for $r in doc("hib_parses.xml")//row let $i := doc("hib_lemmas.xml")//row[field[@name="lemma_lang_id"][. = "3"]] where $r/field[@name="lemma_id"] = $i/field[@name="lemma_id"] return $r ) I have noticed that the where clause needs to be changed into $r/field[@name="lemma_id"]/text() = $i/field[@name="lemma_id"]/text() in order to get a result (otherwise the query seems to never end). I am wondering whether this is a BaseX issue, in that I would assume that the two kinds of where clause are equivalent (because of atomization). I have also noticed that /data() does not work either. Thanks! Best, Giuseppe

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BaseX 9.3: The Winter Edition
by Christian Grün 29 Nov '19

29 Nov '19

Hello to our loyal readers of our list, We are glad to announce version 9.3 of BaseX, our XML framework, database system and XQuery 3.1 processor: http://basex.org/ The focus has been put on in-depth optimizations of complex XQuery code and faster processing of RESTXQ web applications: RESTXQ - seamless streaming of custom responses to the client - Request Module: bind attributes to current request - better support for the OPTIONS and HEAD methods - trace output is now stored in the database logs - enforce premature HTTP response with web:error - optional GZIP compression of HTTP responses - server-side forwarding with web:forward USER INTERFACES - GUI: project view: skip directories with .ignore file - GUI: project view: do now follow symbolic links - DBA: user panel updated to show user info - DBA: faster processing of log entries STORAGE - hot fix for replacing single documents with namespaces - improved XQuery processing of binary resources - ADDCACHE: faster caching of single documents - WITHDB: less locking when using fn:doc XQUERY FUNCTIONS - user:info/user:update-info: process user-specific data - db:open-id, db:open-pre: support for multiple ids - file:descendants: return descendant file paths - inspect:type: return type of a value as string - db:alter-backup: rename database backups - xslt:transform: support for catalog files XQUERY PERFORMANCE - merge of adjacent/redundant steps in paths and predicates - removal of redundant switch, typeswitch and catch clauses - interruption of side-effecting code (Files Modul etc.) - fn:count: pre-evaluation of zero-or-one arguments - faster processing of alternative steps: a/(b,c) - rewriting of paths to simple map expressions - inlining of values in simple map expressions - flattening of nested simple map expressions - rewriting of lists to union expressions - removal of superfluous predicates For a more comprehensive list of added and updated features. please check out our documentation: http://docs.basex.org/. Your feedback is welcome as usual. Have fun with the new release, Your BaseX Team

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I have been given control of xqDoc from Darin McBeath
by Loren Cahlander 22 Nov '19

22 Nov '19

Hello folks, June of 2018, I updated the xqDoc codebase to be able to handle the additions to the language for XQuery 3.1 and most of the vendor specific language extensions. I updated the parser to Antlr 4. Darin McBeath, the creator of xqDoc, asked me if I wanted to take over the domain. I accepted. I will be updating the website http://xqDoc.org and would like to get the community’s input. What changes would people like to see in the website? xqDoc’s GitHub is officially at http://github.com/xqdoc Thank you, Loren Cahlander

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Re: [basex-talk] HTTPServer + gzip compression
by Stefan Koch 20 Nov '19

20 Nov '19

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Re: [basex-talk] HTTPServer + gzip compression
by Stefan Koch 20 Nov '19

20 Nov '19

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