Unclosed statements crash Oracle connection

[philip-alexiev]

Not closing the connection when it is retrieved by db.query(String query) is causing the connection to Oracle to give
ORA-01000: maximum open cursors exceeded

Here is the fix:
https://github.com/philip-alexiev/r2rml-parser

[nkons]

Hi Philip, thanks for taking the time to fix this. I 'll soon get round to revising and merging your contribution. Thanks! Please keep reporting any other issues you may encounter, really appreciate this.

[philip-alexiev]

No problem. I also updated the DATE parsing. Used to produce invalid xsd:date .

[nkons]

Hi, I just pulled and merged your changes into the master branch, thanks.