Yep, we just tried it and it works. Thanks! Eva.
On 2/19/10 10:25 AM, "Prasad Chakka" <pcha...@facebook.com> wrote: > Eva, > > Here is the wiki describing the syntax on changing table properties. > http://wiki.apache.org/hadoop/Hive/LanguageManual/DDL#Add_Table_Properties > > > > From: Eva Tse <e...@netflix.com> > Reply-To: <hive-user@hadoop.apache.org> > Date: Thu, 18 Feb 2010 15:54:01 -0800 > To: <hive-user@hadoop.apache.org>, Zheng Shao <zsh...@gmail.com>, Paul Yang > <py...@facebook.com> > Subject: Re: Question on modifying a table to become external > > > Prasad, > That¹s what we are looking for. > We tried both: > * alter table <table name> add [properties|property] (EXTERNAL¹ =¹TRUE¹) and > it doesn¹t work. Could you give us the syntax where it would work? > > Since it is not documented, we won¹t hold you responsible for it :) > > Zheng, > Your solution works also, except we¹d rather delete that table or at least be > able to rename it. > Our external location is on S3; hence renaming is giving an error like: table > new location hdfs://hive/eva_unittest/warehouse/eva is on a different file > system than the old location > s3n://bucketname/hive/eva_unittest/warehouse/non_external_tbl. This operation > is not supported > > Thanks, > Eva. > > > > > On 2/18/10 12:13 PM, "Prasad Chakka" <pcha...@facebook.com> wrote: > >> I think you can do this by alter table <> add properties (EXTERNAL¹ >> =¹TRUE¹)¹ or some such. Basically Hive knows that a table is an EXTERNAL >> table by checking for a table propery named EXTERNAL¹ and if you add this >> property manually then it should be possible to make it an external table. >> >> I have not tried this so do it at your own risk :) >> >> Prasad >> >> >> >> From: Zheng Shao <zsh...@gmail.com> >> Date: Thu, 18 Feb 2010 11:11:32 -0800 >> To: <hive-user@hadoop.apache.org>, Prasad Chakka <pcha...@facebook.com>, Paul >> Yang <py...@facebook.com> >> Subject: Re: Question on modifying a table to become external >> >> There is no command to do that right now. >> >> One way to go is to create another external table pointing to the same >> location (and forget about the old table). >> Or you can move the files first, before dropping and recreating the same >> table. >> >> Zheng >> On Thu, Feb 18, 2010 at 10:22 AM, Eva Tse <e...@netflix.com> wrote: >>> > >>> > We created a table without the EXTERNAL¹ qualifier but did specify a >>> > location for the warehouse. We would like to modify this to be an external >>> > table. We tried to drop the table, but it does delete the files in the S3 >>> > external location. >>> > >>> > Is there a way we could achieve this? >>> > >>> > Thanks, >>> > Eva. >>> > >>> > CREATE TABLE IF NOT EXISTS exampletable >>> > ( >>> > other_properties Map<string, string>, >>> > event_ts_ms bigint, >>> > hostname string >>> > ) >>> > PARTITIONED by (dateint int, hour int) >>> > ROW FORMAT DELIMITED FIELDS TERMINATED BY '\001' COLLECTION ITEMS >>> TERMINATED >>> > BY '\004' MAP KEYS TERMINATED BY '\002' stored as SEQUENCEFILE >>> > LOCATION ' s3n://bucketname/hive/warehouse/exampletable'; >> >> >> >> -- >> Yours, >> Zheng >> >> > >
