Github user laurentgo commented on a diff in the pull request:
https://github.com/apache/drill/pull/520#discussion_r106083106
--- Diff:
exec/jdbc/src/main/java/org/apache/drill/jdbc/impl/DrillDatabaseMetaDataImpl.java
---
@@ -184,6 +184,17 @@ private ServerMeta getServerMeta() throws SQLException
{
return serverMeta;
}
+ /**
+ * The same as {@link DrillDatabaseMetaDataImpl#getServerMeta()} but
updates server metadata for the every call
+ * @return server meta information
+ * @throws SQLException for error when getting server meta
+ */
+ private ServerMeta getUpdatedServerMeta() throws SQLException {
--- End diff --
There's nothing in the JDBC spec which says if this has to be refreshed
when user session is changed manually. It seems that MySQL doesn't do a server
call each time, but I haven't checked other drivers (not all databases allow to
change the quoting identifier in the session).
I would say it might not be necessary as someone who changed manually the
quoting know that he/she is dealing with Drill and that he/she changed the the
default quoting identifier. But people might have strong arguments in favor of
refreshing...
---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at infrastruct...@apache.org or file a JIRA ticket
with INFRA.
---
