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### What changes were proposed in this pull request? For the following: ``` CREATE TABLE t USING json AS SELECT 1 AS i SELECT * FROM spark_catalog.t ``` `spark_catalog.t` is resolved to `spark_catalog.default.t` assuming the current namespace is `default`. However, this is not consistent with V2 behavior where the namespace must be specified if the catalog name is provided. This PR proposes to fix this inconsistency. ### Why are the changes needed? To be consistent with V2 table naming scheme in SQL commands. ### Does this PR introduce any user-facing change? Yes, now the user has to specify the namespace if the catalog name is provided. For example, ``` SELECT * FROM spark_catalog.t # Will throw AnalysisException with 'Session catalog cannot have an empty namespace: spark_catalog.t' SELECT * FROM spark_catalog.default.t # OK ``` ### How was this patch tested? Added new tests Closes #27642 from imback82/disallow_spark_catalog_wihtout_db. Authored-by: Terry Kim <yuminkim@gmail.com> Signed-off-by: Wenchen Fan <wenchen@databricks.com> |
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