Hi Basex Guru’s
Thanks! So I’ve been trying few things. I think the bath insert works, for both db:add and db:store. So right now I’m trying the delete and store together.
I have:
db:delete('dbTestRepo', 'testdir/someresource.xml'), db:store('dbTestRepo', 'testdir/someresource.xml', file:read-binary('/Users/i843335/work/extensibility/dbtest/buyer2.json’))
It am assuming that in this case, it should do delete first (if the path exist), and then do the store to the same path. However, I find that regardless of whether the existing resource exist for the same resource, both are not being committed.
It does seem that the results have 2 updated item, but nothing gets persisted when I do db:list(‘dbTestRepo’).
Is there something that I have missed ? Thanks.
Regards, -Genneva
From: <basex-talk-bounces@mailman.uni-konstanz.demailto:basex-talk-bounces@mailman.uni-konstanz.de> on behalf of Dirk Kirsten <dk@basex.orgmailto:dk@basex.org> Date: Thursday, May 19, 2016 at 11:59 PM To: "basex-talk@mailman.uni-konstanz.demailto:basex-talk@mailman.uni-konstanz.de" <basex-talk@mailman.uni-konstanz.demailto:basex-talk@mailman.uni-konstanz.de> Subject: Re: [basex-talk] multiple inserts/update/deletes in single transaction
Hello Genneva,
this is expected behaviour. BaseX script executed each command separately. This is by design and required by the nature of XQuery (Update), which by design always executes as one transaction - Which can be difficult do deal with if you have a large amount of data and have to e.g. hold it in memory.
Each XQuery runs in one single transaction, so you can simply add your documents via XQuery, e.g.
db:add("DB", "embedded7.xml"), db:add("DB", "embedded8.xml")
Cheers
Dirk
On 05/19/2016 08:11 PM, Wang, Genneva wrote: Hi
I’m trying to figure out whether batched transaction would work for basex, and I came across the RUN and EXECUTE command specified in http://files.basex.org/releases/8.4/BaseX84.pdf page 58-59. The document mentioned following in the summary section:
RUN:Evaluates the contents of file as XQuery expression. If the file ends with the suffix .bxs, the file content will be evaluated as command script. This command can be used to run several commands in a single transaction EXECUTE: Evaluates the specified input as command script. This command can be used to run several commands in a single transaction.
I’ve tried this myself For example, I’d like to know if I batch 2 inserts, if one fails, would both inserts get rollback.
I’m using a simple .bxs (attached and also listed below for your convenience) and run the execute using GUI.
OPEN test ADD TO embedded7.xml <root>embedded</root> ADD TO embedded8.xml <root>embedded CLOSE
The second ADD (embedded8.xml) is not a valid xml format so I’m expecting it to fail, and rollback both files if any of them have already added. But after executing this script, I’m seeing embedded7.xml have been added.
Would you be able to confirm if this is the expected behavior ? If so, is there anyway that I can batch multiple inserts and ensures that these batch of files can be committed at the same time, and rollback all together if any of the file has an error ?
Thank you very much for your help.
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