[jira] [Created] (SPARK-30494) Duplicates cached RDD when create or replace an existing view

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

Lantao Jin created SPARK-30494:
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             Summary: Duplicates cached RDD when create or replace an existing view
                 Key: SPARK-30494
                 URL: https://issues.apache.org/jira/browse/SPARK-30494
             Project: Spark
          Issue Type: Bug
          Components: SQL
    Affects Versions: 3.0.0
            Reporter: Lantao Jin


We can reproduce by below commands:
{code}
beeline> create or replace temporary view temp1 as select 1
beeline> cache table tempView
beeline> create or replace temporary view temp1 as select 1, 2
beeline> cache table tempView

The cached RDD for plan "select 1" stays in memory forever until the session close. This cached data cannot be used since the view temp1 has been replaced by another plan. It's a memory leak.

assert(spark.sharedState.cacheManager.lookupCachedData(sql("select 1, 2")).isDefined)
assert(spark.sharedState.cacheManager.lookupCachedData(sql("select 1")).isDefined)



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