Hi Tim,

Thanks for your observation. We need more help to reproduce this: Could you describe in detail, and step by step, how to trigger this issue?

In addition, you could…
• tell us more about your OS and JDK version
• start BaseX on command line and share a possible stack trace with us
• verify if the error also occurs with other XML input (such as <x/>) and other queries (such as .)

The simpler the use case, the better…

Thanks
Christian



On Fri, Mar 1, 2024 at 6:11 PM Thompson, Timothy <timothy.thompson@yale.edu> wrote:

I’ve been noticing an inconsistent behavior in the GUI with BaseX 11 beta (build 17d8426).

 

I have a simple query on a database created from a CSV file. Sometimes it works, but sometimes the root context is evaluated as an empty sequence:

 

- rewrite context value: . -> ()

- rewrite util:root(nodes): util:root(()) -> ()

 

I notice this when I open the database as context and try to execute the query. After the query fails, if I try to click on the “home” icon in the result panel, it also returns an empty sequence, even though the database is open.

 

If I reopen the database and run the query, it works again.

 

Sample data:

 

<csv>

  <record>

    <entry>http://id.loc.gov/authorities/names/n00000121</entry>

    <entry>http://id.loc.gov/rwo/agents/n00000121</entry>

    <entry>0.11861849</entry>

  </record>

  <record>

    <entry>http://id.loc.gov/authorities/names/n00000122</entry>

    <entry>http://id.loc.gov/rwo/agents/n00000122</entry>

    <entry>0.11699477</entry>

  </record>

  <record>

    <entry>http://id.loc.gov/authorities/names/n00000267</entry>

    <entry>http://id.loc.gov/rwo/agents/n00000267</entry>

    <entry>0.10811427</entry>

  </record>

</csv>

 

Query (with DB open as context):

 

count(distinct-values(

  for $rec in /csv/record 

  where contains($rec/entry[1], "id.loc.gov")

  return $rec/entry[1]

))

 

Thanks in advance,

Tim