[jira] [Updated] (SPARK-34108) Caching with permanent view doesn't work in certain cases

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

     [ https://issues.apache.org/jira/browse/SPARK-34108?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Chao Sun updated SPARK-34108:
-----------------------------
    Summary: Caching with permanent view doesn't work in certain cases  (was: Caching doesn't work completely with permanent view)

> Caching with permanent view doesn't work in certain cases
> ---------------------------------------------------------
>
>                 Key: SPARK-34108
>                 URL: https://issues.apache.org/jira/browse/SPARK-34108
>             Project: Spark
>          Issue Type: Sub-task
>          Components: SQL
>    Affects Versions: 3.1.0
>            Reporter: Chao Sun
>            Priority: Major
>
> Currently, caching a permanent view doesn't work in certain cases. For instance, in the following:
> {code:sql}
> CREATE TABLE t (key bigint, value string) USING parquet
> CREATE VIEW v1 AS SELECT key FROM t
> CACHE TABLE v1
> SELECT key FROM t
> {code}
> The last SELECT query will hit the cached {{v1}}. On the other hand:
> {code:sql}
> CREATE TABLE t (key bigint, value string) USING parquet
> CREATE VIEW v1 AS SELECT key FROM t ORDER by key
> CACHE TABLE v1
> SELECT key FROM t ORDER BY key
> {code}
> The SELECT won't hit the cache.
> It seems this is related to {{EliminateView}}. In the second case, it will insert an extra project operator which makes the comparison on canonicalized plan during cache lookup fail.



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