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03-22-2016
11:40 AM
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As per hive documentation what you have specified at the time of creation of bucket table with no.of buckets is become the number of reducers.If you have huge data single file contains different data. https://cwiki.apache.org/confluence/display/Hive/LanguageManual+DDL+BucketedTables
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03-22-2016
11:16 AM
Yes.It should be ORC file as specified in the creation of table definition.What we are specified file type at the time of creation should be load. Other wise do one thing.Create a temp table with stored as text(by default if not specified) and later create your table with stored as orc using select from temp table(ctas)
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