Apoc.load.jdbc problem querying advantage database


(Paul Drangeid) #1

Problem is LIKELY the quite old implementation that SAP is using in their jdbc driver, but unfortunately I think I'm stuck with it.

Using Advantage JDBC Driver 11.1

driver loads ok, and I am querying the database, but I suspect APOC is using a much newer JAVA method than this old JDBC driver supports. Following is my query attempt and the resulting error message:

CALL apoc.load.driver("com.extendedsystems.jdbc.advantage.ADSDriver")
call apoc.load.jdbc('jdbc:extendedsystems:advantage://commitcrm:6262;catalog=//commitcrm.mysite.com/CommitCRM/Db','SELECT source FROM Tickets WHERE source is not null') YIELD row
return row


Neo.ClientError.Procedure.ProcedureCallFailed: Failed to invoke procedure apoc.load.jdbc: Caused by: java.lang.AbstractMethodError: Method com/extendedsystems/jdbc/advantage/ADSResultSet.isClosed()Z is abstract

Any suggestions, or am I stuck because of this legacy JDBC driver?

(Michael Hunger) #2

Hmm seems this JDBC driver doesn't implement some APIs.
A little bit hard to fix but I can have a look.

Can you test this one? https://www.dropbox.com/s/ebyuwwn3dhesufq/apoc-

(Paul Drangeid) #3

That did the trick!

I can do some further testing... This will allow me to do realtime queries to that platform without waiting for our nightly exports into our SQL database.

Thank you.

(Michael Hunger) #4

Should be in the latest release

(Paul Drangeid) #5

It looks like some small changes in functionality.

In the TEST version I was using, when I queried DATE fields, the returned values were automatically converted into the EPOCH:

In the new version the value being returned is the original STRING from the advantage DB:

Which is fine, I CAN go add conversion routines into my scripts, but the auto-conversion was actually quite convenient! I'm not sure what was the intended output.


(Paul Drangeid) #6

I can confirm this now. I discovered this because I was replacing an older dev box (3.4.7) running your test test version of APOC that you compiled for me to fix ADVANTAGE JDBC (thank-you by the way!).

And I build a new test box on 3.4.9 and I put the new APOC in, and that's where the change occurs.
I'm pretty sure that the Advantage database is storiing the date in the string format, and I suspect the test version of was auto-converting to the EPOCH in ms for the date field. (which is actually quite helpful!), while the new version is probably returning the queried field unconverted -- which I am guessing was actually the desired behavior. Maybe I was enjoying the benefits of an unintended bug!

I can't verify for sure, because I don't have a browser/explorer tool handy to look through the original Advantage database.

Thanks Michael! Please let me know if I can help test or validate anything. For now I'm going to continue using the test version because it affords me to be lazy for a few days, and not go fix my CYPHER to add the conversion process after the JDBC query.

(Michael Hunger) #7

Please try the recently released version.