Hi Follower, Please help review this PR, So that I can make some improvements. Thanks very much.
The XmlFunctions have the default error listener in jdk. And the default listener has two points that need to improvement: 1) As far as I know, In the different Java versions, the default listener has different behavior. (CALCITE-4799) 2) The default listener print exception by System.err. (CALCITE-4131) That's why need the PR. The ISSUE ADDRESS: https://issues.apache.org/jira/projects/CALCITE/issues/CALCITE-4131?filter=myopenissues THE PR ADDRESS: https://github.com/apache/calcite/pull/2543
