Thank you for your reply.
Your mean is I will execute below statement:
statement.execute("set hive.merge.mapfiles=true");
statement.execute("set hive.merge.mapredfiles=true");
The two parementers are both true, right?
2010/8/6 Namit Jain <[email protected]>
> HIVEMERGEMAPFILES("hive.merge.mapfiles", true),
> HIVEMERGEMAPREDFILES("hive.merge.mapredfiles", false),
>
>
> Set the above parameters to true before your query.
>
>
>
> ________________________________________
> From: lei liu [[email protected]]
> Sent: Thursday, August 05, 2010 8:47 PM
> To: [email protected]
> Subject: How to merge small files
>
> When I run below sql: INSERT OVERWRITE TABLE tablename1 select_statement1
> FROM from_statement, there are many files which size is zero are stored to
> hadoop,
>
> How can I merge these small files?
>
> Thanks,
>
>
>
> LiuLei
>
>
