Jesus Camacho Rodriguez created HIVE-14498:
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Summary: Timeout for query rewriting using materialized views
Key: HIVE-14498
URL: https://issues.apache.org/jira/browse/HIVE-14498
Project: Hive
Issue Type: Sub-task
Components: Materialized views
Affects Versions: 2.2.0
Reporter: Jesus Camacho Rodriguez
Once we have query rewriting in place (HIVE-14496), one of the main issues is
data freshness in the materialized views.
Since we will not support view maintenance at first, we could include a
HiveConf property to configure a max freshness period (_n timeunits_). If a
query comes, and the materialized view has been populated (by create, refresh,
etc.) for a longer period than _n_, then we should not use it for rewriting the
query.
Optionally, we could print a warning for the user indicating that the
materialized was not used because it was not fresh.
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