Re: HiveContext: cache table not supported for partitioned table?

[Du Li]

Thanks for your explanation.

From: Cheng Lian lian.cs@gmail.commailto:lian.cs@gmail.com
Date: Thursday, October 2, 2014 at 8:01 PM
To: Du Li l...@yahoo-inc.com.INVALIDmailto:l...@yahoo-inc.com.INVALID, 
d...@spark.apache.orgmailto:d...@spark.apache.org 
d...@spark.apache.orgmailto:d...@spark.apache.org
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Subject: Re: HiveContext: cache table not supported for partitioned table?


Cache table works with partitioned table.

I guess you’re experimenting with a default local metastore and the 
metastore_db directory doesn’t exist at the first place. In this case, all 
metastore tables/views don’t exist at first and will throw the error message 
you saw when the PARTITIONS metastore table is accessed for the first time by 
Hive client. However, you should also see this line before this error:

14/10/03 10:51:30 ERROR ObjectStore: Direct SQL failed, falling back to ORM

And then the table is created on the fly. The cache operation is also performed 
normally. You can verify this by selecting it and check the Spark UI for cached 
RDDs. If you try to uncache the table and cache it again, you won’t see this 
error any more.

Normally, in production environment you won’t see this error because metastore 
database is usually setup ahead of time.

On 10/3/14 3:39 AM, Du Li wrote:

Hi,

In Spark 1.1 HiveContext, I ran a create partitioned table command followed by 
a cache table command and got a java.sql.SQLSyntaxErrorException: Table/View 
'PARTITIONS' does not exist. But cache table worked fine if the table is not a 
partitioned table.

Can anybody confirm that cache of partitioned table is not supported yet in 
current version?

Thanks,
Du

​

Re: HiveContext: cache table not supported for partitioned table?

[Cheng Lian]

Cache table works with partitioned table.

I guess you’re experimenting with a default local metastore and the 
metastore_db directory doesn’t exist at the first place. In this case, 
all metastore tables/views don’t exist at first and will throw the error 
message you saw when the |PARTITIONS| metastore table is accessed for 
the first time by Hive client. However, you should also see this line 
before this error:


   14/10/03 10:51:30 ERROR ObjectStore: Direct SQL failed, falling back
   to ORM

And then the table is created on the fly. The cache operation is also 
performed normally. You can verify this by selecting it and check the 
Spark UI for cached RDDs. If you try to uncache the table and cache it 
again, you won’t see this error any more.


Normally, in production environment you won’t see this error because 
metastore database is usually setup ahead of time.


On 10/3/14 3:39 AM, Du Li wrote:


Hi,

In Spark 1.1 HiveContext, I ran a create partitioned table command 
followed by a cache table command and got 
a java.sql.SQLSyntaxErrorException: Table/View 'PARTITIONS' does not 
exist. But cache table worked fine if the table is not a partitioned 
table.


Can anybody confirm that cache of partitioned table is not supported 
yet in current version?


Thanks,
Du


​