[jira] [Created] (SPARK-30014) for non-default catalog, namespace name is always needed in a query?

["xufei (Jira)" <ji...@apache.org>]

xufei created SPARK-30014:
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             Summary: for non-default catalog, namespace name is always needed in a query?
                 Key: SPARK-30014
                 URL: https://issues.apache.org/jira/browse/SPARK-30014
             Project: Spark
          Issue Type: Question
          Components: SQL
    Affects Versions: 3.0.0
            Reporter: xufei


Hi,

I'm trying to write a catalog plugin based on spark-3.0-preview,  and I found even when I use 'use catalog.namespace' to set the current catalog and namespace, I still need to qualified name in the query.

For example, I add a catalog named 'example_catalog', and there is a database named 'test' in 'example_catalog', a table 't' in 'example_catalog.test'

I can query the table using 'select * from example_catalog.test.t' under default catalog(which is spark_catalog)

then I use 'use example_catalog.test' to change the current catalog to 'example_catalog', and the current namespace to 'test'

I that can query the table using 'select * from test.t'

but 'select * from t' failed due to table_not_found exception

I want to known is this an expected behavior?  If yes, it sounds a little weird since I think after 'use example_catalog.test', all the un-qualified identifiers should be interpreted as 'example_catalog.test.identifier'

 



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