chenxk commented on issue #10419:
URL:
https://github.com/apache/shardingsphere/issues/10419#issuecomment-846894064
> > @PaleWhiteDot @chenxk I have tried to reproduce this problem, but
failed. Can you provide steps to reproduce this exception?
>
> I found where the question is? In this
method:PhysicalIndexMetaDataLoader.load(final Connection connection, final
String table), will invoke connection.getSchema() and then will invoke the
instance MetaDataConnectionAdapter.getSchema()
>
> ```
> public String getSchema() {
> return
DatabaseMetaDataDialectHandlerFactory.findHandler(databaseType).map(handler ->
handler.getSchema(connection)).orElse(getSchema(connection));
> }
> ```
>
> handle.getSchema(connection) like this（in this method
OracleDatabaseMetaDataDialectHandler.getSchema()）
>
> ```
> @Override
> public String getSchema(final Connection connection) {
> try {
> return
Optional.ofNullable(connection.getMetaData().getUserName()).map(String::toUpperCase).orElse(null);
> } catch (final SQLException ignored) {
> return null;
> }
> }
> ```
>
> The code try to get my username as the schema, undoubted it is impossible
be null,so this place
>
> ```
> handler.getSchema(connection)).orElse(getSchema(connection))
> ```
>
> won't invoke orElse logic.But If invoke orElse i will get the correct
schema
I also solved it like this!
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