yixiaohua created SPARK-5195:
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Summary: when hive table is query with alias the cache data lose
effectiveness.
Key: SPARK-5195
URL: https://issues.apache.org/jira/browse/SPARK-5195
Project: Spark
Issue Type: Bug
Components: SQL
Affects Versions: 1.2.0
Reporter: yixiaohua
override the MetastoreRelation's sameresult method only compare databasename
and table name
because in previous :
cache table t1;
select count() from t1;
it will read data from memory but the sql below will not,instead it read from
hdfs:
select count() from t1 t;
because cache data is keyed by logical plan and compare with sameResult ,so
when table with alias the same table 's logicalplan is not the same logical
plan with out alias so modify the sameresult method only compare databasename
and table name
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