I am executing the following XQuery code on BaseX 7.9 and am able to see the insertion on the results window. I even see the new node after closing and reopening the collection. However, when I go to the file directory I see it hasn't been modified. So, how can I make the insertion reflect as well on the file? And how does BaseX handle insertion commands so it is persistent in the context of the database but not in the context of the file?
let $up := <Employee Name="Joe">
<Personal>
<SSN>666-66-1234</SSN>
</Personal>
<StaffInfo>
<Position>Doctor</Position>
<AccountableTo>Jeff</AccountableTo>
</StaffInfo>
</Employee>
return insert node $up as last into doc('office')/Staff
BaseX databases correspond to the XML files they were created from, but in a special encoding for high query performance enriched with some indices. When updating a database using XQuery Update, the original file does not automatically get updated (thus, the XML serialized from the database).
Export the database after updating it using either
the command prompt and the EXPORT command:
EXPORT [path]
Export database to XML.
the graphical user interface and the export dialog in the menu bar under Database, Export.
By default, updates will not be reflected on XML documents outside a database. However, updates may be enforced via the command-line flag -U or the option WRITEBACK.
Related
Hello I am trying to read a module with this code:
(: Entry point - must be a read-only query. :)
xdmp:invoke(
'/path/mydocument.xqy',
(xs:QName('var1'), 'test',
xs:QName('var2'), "response"))
I am new in MarkLogic, I am using groovy and the api to connect to it, but also I saw I can invoke the module with this and indeed I did but it returns me
your query returned an empty sequence
I want to know if I can query xs:QName('var1'), 'test', changing test with a wildcard or how can I get all the information from the file called /path/mydocument.xqy?
I tried to use this:
xdmp:document-get("/path/mydocument.xqy)
but it says the file is not found. Although, if I use invoke I can query it, but I don't know what are the values I have to pass. I was wondering if there is something like sql using %% or something to give me all the data.
To answer the first question: "I am trying to read a module "
IF the module is in the database, then you must query the Modules database in which the module resides.
If the module is in the filesystem then you cannot directly access its source as a document but you can by executing xdmp:filesystem-file()
Simplification:
With the Default configuration of the server and REST client, user placed modules are in the "Modules" database and user placed documents are in the "Documents" database. This means, if you do a GET (read a "Document") with no additional parameters, it will return documents from the "Documents" database. Assuming you are using the default configuration for client and server, this would result in the behavior you are seeing. E.g. your Module code is in the Modules database, doing a GET for it by name will search the Documents database and correctly not find it.
You don't mention, and I don't know, the groovy library being used, but the REST API itself and all implementations of general purpose ML REST client libraries I am familiar with have options for overriding the default database with another. If the groovy library supports that, then specify the "Modules" database for your query and it should return the module document. Note: content-type will be application/text not text/xml.
You can simplify things for testing by bypassing the libraries and simply use a browser and try a URL like this http://yourserver.com:8000/v1/documents?uri=/your/module.xqy&database=Modules
Ref: https://docs.marklogic.com/REST/GET/v1/documents
Making the appropriate changes to the path and server for your use.
If you are still confused, then you should start with the basic MarkLogic tutorials and work through them one by one. You will most likely succeed faster by doing this then jumping straight into coding you don't understand yet.
DETAIL:
Note: The default behaviour is to EXECUTE documents when doing a GET call, using the Modules database. Thus doing a GET of http://yourserver:8000/your/module.xqy will EXECUTE it not return its source.
You will notice the REST API has a uri query parameter. This is EXECUTING the REST API code on /v1/documents which in turn will read the document specified by the uri and database parameters and return it.
I guess I can use:
xdmp:invoke(/pview/get-pview-browse-profiles.xqy,
cts:and-query((
cts:element-value-query(
xs:QName("letter"),"*", "wildcarded"),
cts:element-value-query(
xs:QName("collection"),"*", "wildcarded"))))
although it doesn't return anything
I am looking for a way how to retrieve the source code of an XQuery module stored in the database.
Is there any way how to do this using eXist-db's REST API or an XQuery extension function or any other eXist-db interface?
If you are using the REST Server, you have two main options:
Do a GET on the XQuery stored in the db, with the query string parameter _source=yes. You need to change some settings in $EXIST_HOME/descriptor.xml to enable that.
Write a query for retrieving queries. A query stored in the database is like any other binary document, so you could use util:binary-doc() to get it.
I need to poll the data in xml format and map it to the EDI 834.........
I have written the stored procedure using for xml auto,element
when i consume it using add adapter metadata i am getting a xml message....
but i need to use this xml message to map it to the EDI834 ....How to get the structure of xml so that i can use that in map....
I also followed http://social.msdn.microsoft.com/Forums/en-US/biztalkgeneral/thread/6a7e0093-0692-4ba5-9e14-0d2090c2cf54
this thread and generated the schems using xml polling and mapped that to EDI834.
But when i use the map into outbound map...It doesnt map the polling data to edi 834..
The WCF-SQL adapter removes the need to use the 'for xml auto, elements' syntax. This is a legacy leftover from the old Sql Adapter.
Just write your stored procedure in a manner to return a consistent result set, then generate metadata against the stored procedure. The adapter framework will create an appropriate schema based on the metadata returned from your stored procedure.
Then simply map the data from your WCF-SQL schema to your EDI834 schema.
Create the stored procedure that returns xml (or xml part) by using the FOR XML PATH syntax
-Setup a receive location using WCF-SQL. Select XmlPolling. Choose a rootname and namespace for the adapter to wrap around the xml returned from SQL (mandatory).
-Set Polling Statement to: exec [SPNAME]
-Set PollDataAvailableStatement to something appropriate that will return a count > 0 if there are rows/xml to be polled.
-Use passthrureceive pipeline for the receive-location
-Set up a send port (FILE) that subscribes to everything that comes from the receiveport used for the receivelocation.
-Start the application. Examine the XML returned from the adapter.
-In VS generate a schema using well-formed XML (Add->Add generated Items->Generate Schemas) (NOTE: You may have to run the InstallWFX.vbs found under the BizTalk SDK/Utilities/Schema generator, if you have not already done this earlier on the machine).
-Choose the xml file generated by the adapter (give the file a name representing the schema you are trying to create).
-Now you should have a schema representing the xml returned by the adapter, you may have to go through the schema manually and change data types to something more appropriate than what the wizard has chosen.
Several approaches:
Use SQL Bulk Import Stored Proc and call the stored proc with the file path
Use SqlBulkCopy in System.Data.SqlClient dll
Read the file line by line and then insert into a table row by row
Any other ways?
Which one is best? I just want the user to select a file from asp.net webpage. And then click on Upload button to store the file in DB.
Secondly, do I need to move the file in server's memory before the file is copied into db table?
The DB won't know of the file because everything should be decoupled and layered. Saving the file to some shared location adds overhead and tidy ups etc
Yes
Surely you want this to be an atomic operation. 10k rows would be 10 round trips with a client side transaction running. If not atomic, then you'd need staging tables and tidy ups
Parse in c#, send to the DB with a table valued parameter. Otherwise, probably nothing same and/or realistic...
I am running SQLite3 version sqlite-3.6.12 and I have successfully
ported it to my OS. The problem I am seeing is that when I execute the
command "PRAGMA journal_mode = OFF" it returns "OFF" but I am still seeing
*.db-journal files being created. It is critical that these files are not
created for the purpose of my project. When I step through the code
sqlite3PagerJournalMode is returning PAGER_JOURNALMODE_OFF so I am wondering
if setting journal_mode=OFF should still produce these files or if there is
something else that I am missing.Please help
I also tried PRAGMA main.journal_mode = OFF and PRAGMA journal_mode = MEMORY.But the journel file is creating as such !!!!
Compile your application with the ption macro:
SQLITE_ENABLE_ATOMIC_WRITE
If this C-preprocessor macro is defined and if the xDeviceCharacteristics method of sqlite3_io_methods object for a database file reports (via one of the SQLITE_IOCAP_ATOMIC bits) that the filesystem supports atomic writes and if a transaction involves a change to only a single page of the database file, then the transaction commits with just a single write request of a single page of the database and no rollback journal is created or written.