BaseX-Talk

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5251 discussions

Strange index values with numerics
by Zachary N. Dean 28 Aug '18

28 Aug '18

Hi, I was recently taking a look into the index data files (for reasons) and came across something that I found strange... When numeric values are in nodes they are put into the index with min/max and distinct token values, which is cool. What's strange is, when negative integer values are in text and attribute nodes the index contains the minimum value correctly, but the maximum value is '4.9E-324' ([0,0,0,0,0,0,0,1]). This doesn't seem to happen with positive values. Now, with small value ranges I assume this is okay, but with many values I would imagine it could slow things down. Not sure if this is a bug or a feature, so I figured I'd bring it up. Here an example: <r> <a>-1</a> <b>0</b> <c>1</c> <d>-50000</d> <d>-49000</d> <e>2</e> <e>3</e> <f a="-1"/> <g>-1</g> <g>1</g> </r> I would have assumed that the index would see that element "d" has a min of -50000 and a max of -49000. Here the index infos: Elements - Structure: Hash - Entries: 8 g 2x, 2 distinct integers [-1, 1], leaf e 2x, 2 distinct integers [2, 3], leaf d 2x, 2 distinct integers [-50000, 4.9E-324], leaf c 1x, integer [1, 1], leaf f 1x, leaf r 1x a 1x, integer [-1, 4.9E-324], leaf b 1x, integer [0, 4.9E-324], leaf Attributes - Structure: Hash - Entries: 1 a 1x, integer [-1, 4.9E-324], leaf If it's a feature, then cool. Keep on rockin'! If not, then I hope this helps a little. Thanks, Zack Dean

3 2

Update functions - Error handling and counting
by Bogdan Bogucki 26 Aug '18

26 Aug '18

Hello, I am playing with XQUF in BaseX ann I encountered following problems. 1) XQuery is functional language and updating function can return empty sequence. How can I count and return result how many nodes was inserted or updated ? Example: declare %private %updating function cfv:upsertVehicles ($vehicles as node()*) as empty-sequence() { let $db := db:open("db")/cars for $v in $vehicles let $dbVehicle := $db/car[vin = $v/vin] return if (not(exists($dbVehicle))) then (insert node $v as last into $db) else if (exists($dbVehicle)) then (replace node $dbVehicle with $v) else () }; I have similar problem with error handling. How can I catch and return any error. Regards Bogdan Bogucki

2 5

archive
by Ветошкин Владимир 23 Aug '18

23 Aug '18

4 7

Forcing reading _only_ from standard input
by Richard Walker 22 Aug '18

22 Aug '18

Hi. I have a script in which I process data from standard input like this: VOCAB_WITH_NEW_VOCAB_NOTE="$(echo "$VOCAB" | "${BASEX}" -i - -q $" copy \$c := . modify ... etc. etc. The script has been working fine. However, due to a defect in an earlier line in the script, during one test run, the value of $VOCAB was (incorrectly) an empty string. But in this case, I got a quite unexpected result from the above invocation of BaseX. I can easily repeat the same phenomenon out of the script's context thus: $ echo '' | basex -i - -q '.' <vocabulary xmlns="http://vocabs.ands.org.au/registry/schema/2017/01/vocabulary" ... etc. etc. In this case, rather than processing the empty string provided as standard input, BaseX fetched data from one of my databases. Can I/how do I force the option "-i -" to mean "read data from standard input, and _only_ from standard input, even if that is empty"? -- Richard Walker Australian Research Data Commons (ARDC) (formerly, Australian National Data Service, ANDS) 101 Liversidge Street The Australian National University Acton ACT 2601, Australia E: Richard.Walker(a)ardc.edu.au T: +61 2 6125 0584 W: ardc.edu.au W: www.ands.org.au

2 4

basex 9.1 and websockets
by Maximilian Gärber 22 Aug '18

22 Aug '18

Hi, how far are we from the wss enabled release? I am ready for beta testing ;-) Br, Max

2 1

XML Merging while reading from the DB
by DK Singh 18 Aug '18

18 Aug '18

Hi All, I have ingested the XML into DB having node "include" and within "include" some file referenced, when i read the file from the DB it merges the each XML , is there any way to disabled include functionality while reading the file. Input ========================== <book xmlns="http://docbook.org/ns/docbook" xmlns:xlink=" http://www.w3.org/1999/xlink" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xi="http://www.w3.org/2001/XInclude" version="5.0-extension bp-0.1" role="fullText" xml:id="b-9781845928315" xml:lang="en" outputformat='e-Only'> <xi:include href="test1.xml"/> <xi:include href="test2.xml"/> </book> i am reading the file using fn:doc() or db:open() both the function Merging included files. Note: i don't have to set the option on the DB label to disable xinclude . Regards Dharmendra Kumar Sing

1 0

archive:create
by Ветошкин Владимир 17 Aug '18

17 Aug '18

2 2

XML Files merging while reading from the DB
by DK Singh 17 Aug '18

17 Aug '18

1 0

Re: [basex-talk] release read lock
by Christian Grün 17 Aug '18

17 Aug '18

Hi Владимир (cc to the list), > let $docs := db:open('sirukov')/docs/doc > for $msg in db:open('sirukov')/msgs/msg[EnvelopeID = $docs/envelopeid] > let $db := try {db:open($msg/dbname)} catch * {} > for $xml in $db[*:Envelope/*:Header/*:RoutingInf/*:EnvelopeID = $msg/EnvelopeID] > (: some actions with $xml and then return map data :) > return $xml Thanks. So you’d like to close the single databases after you have processed them in you inner loop, right? That’s not possible indeed, I’m sorry (because it might happen that your database would need to be opened twice – and due to the functional nature of XQuery, the database, and its contents, must be the same throughout the query). I know too less about your data (the number of databases, their size) and the evaluation times of your query, but you could try to use the enforceindex pragma [1] to enforce index rewritings. Best, Christian [1] http://docs.basex.org/wiki/XQuery_Extensions#Database_Pragmas

1 0

release read lock
by Ветошкин Владимир 17 Aug '18

17 Aug '18

2 3

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