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Posted to dev@hive.apache.org by "Krisztian Kasa (Jira)" <ji...@apache.org> on 2021/01/15 14:50:00 UTC

[jira] [Created] (HIVE-24644) QueryResultCache parses the query twice

Krisztian Kasa created HIVE-24644:
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             Summary: QueryResultCache parses the query twice
                 Key: HIVE-24644
                 URL: https://issues.apache.org/jira/browse/HIVE-24644
             Project: Hive
          Issue Type: Improvement
          Components: HiveServer2, Parser
            Reporter: Krisztian Kasa
            Assignee: Krisztian Kasa


Query result cache lookup results by query text which has fully resolved table references.
In order to generate this query text currently implementation 
* transforms the AST tree back to String
* parses the String generated in above step
* traverse the new AST and replaces the table references to the fully qualified ones
* transforms the new AST tree back to String -> this will be the cache key




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