[SPARK-6910] [SQL] Support for pushing predicates down to metastore for partition pruning#6921

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piaozhexiu wants to merge 6 commits intoapache:masterfrom

piaozhexiu:SPARK-6910

Commits on Jun 29, 2015

Implement predicate pushdown for hive metastore catalog
Cheolsoo Park
committed
Check data types of expressions and push down string and integral types
Cheolsoo Park
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Fix stylecheck
Cheolsoo Park
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Disable predicate pushdown when hive metastore version is older than
Cheolsoo Park
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Push down predicates when convertMetastoreParquet=true
Cheolsoo Park
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Remove an empty line
Cheolsoo Park
committed