Tony Burton 2013-03-26, 17:11
Ramki Palle 2013-03-26, 17:41
Sanjay Subramanian 2013-03-26, 17:21
Thanks for the quick reply Sanjay.
ALTER TABLE is the key, but slightly different to your suggestion. I create the table as before, but don't specify location:
$ create external table myData (str1 string, str2 string, count1 int) partitioned by <snip> row format <snip> stored as textfile;
Then use ALTER TABLE like this:
$ ALTER TABLE myData SET LOCATION ' s3://mybucket/path/to/data/src1.txt ';
Bingo, I can now run queries with myData in the same way I can when the LOCATION is a directory. Cool!
From: Sanjay Subramanian [mailto:[EMAIL PROTECTED]]
Sent: 26 March 2013 17:22
To: [EMAIL PROTECTED]
Subject: Re: S3/EMR Hive: Load contents of a single file
Can u create the table without any location.
After that you could do an ALTER TABLE add location and partition
ALTER TABLE myData ADD PARTITION (partitionColumn1='$value1' , partitionColumn2='$value2') LOCATION '/path/to/your/directory/in/hdfs';"
An example Without Partitions
ALTER TABLE myData SET LOCATION 'hdfs://10.48.97.97:9000/path/to/your/data/directory/in/hdfs';"
While specifying location, you have to point to a directory. You cannot point to a file (IMHO).
Hope that helps
From: Tony Burton <[EMAIL PROTECTED]<mailto:[EMAIL PROTECTED]>>
Reply-To: "[EMAIL PROTECTED]<mailto:[EMAIL PROTECTED]>" <[EMAIL PROTECTED]<mailto:[EMAIL PROTECTED]>>
Date: Tuesday, March 26, 2013 10:11 AM
To: "[EMAIL PROTECTED]<mailto:[EMAIL PROTECTED]>" <[EMAIL PROTECTED]<mailto:[EMAIL PROTECTED]>>
Subject: S3/EMR Hive: Load contents of a single file
I've been using hive to perform queries on data hosted on AWS S3, and my tables point at data by specifying the directory in which the data is stored, eg
$ create external table myData (str1 string, str2 string, count1 int) partitioned by <snip> row format <snip> stored as textfile location 's3://mybucket/path/to/data';
where s3://mybucket/path/to/data is the "directory" that contains the files I'm interested in. My use case now is to create a table with data pointing to a specifc file in a directory:
$ create external table myData (str1 string, str2 string, count1 int) partitioned by <snip> row format <snip> stored as textfile location 's3://mybucket/path/to/data/src1.txt';
and I get the error: "FAILED: Error in metadata: MetaException(message:Got exception: java.io.IOException Can't make directory for path 's3://spinmetrics/global/counter_Fixture.txt' since it is a file.)". Ok, lets try to create the table without specifying the data source:
$ create external table myData (str1 string, str2 string, count1 int) partitioned by <snip> row format <snip> stored as textfile
Ok, no problem. Now lets load the data
$ LOAD DATA INPATH 's3://mybucket/path/to/data/src1.txt' INTO TABLE myData;
(referring to https://cwiki.apache.org/Hive/languagemanual-dml.html - "...filepath can refer to a file (in which case hive will move the file into the table)")
Error message is: " FAILED: Error in semantic analysis: Line 1:17 Path is not legal ''s3://mybucket/path/to/data/src1.txt": Move from: s3:// mybucket/path/to/data/src1.txt to: hdfs://10.48.97.97:9000/mnt/hive_081/warehouse/gfix is not valid. Please check that values for params "default.fs.name" and "hive.metastore.warehouse.dir" do not conflict."
So I check my default.fs.name and hive.metastore.warehouse.dir (which have never caused problems before):
$ set fs.default.name;
$ set hive.metastore.warehouse.dir;
Clearly different, but which is correct? Is there an easier way to load a single file into a hive table? Or should I just put each file in a directory and proceed as before?
Senior Software Engineer
e: [EMAIL PROTECTED]<mailto:[EMAIL PROTECTED]>
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Sanjay Subramanian 2013-03-26, 17:41
Tony Burton 2013-03-26, 17:45
Keith Wiley 2013-03-26, 19:39
Tony Burton 2013-03-27, 08:46
Tony Burton 2013-03-27, 09:58
Keith Wiley 2013-03-27, 17:02
Tony Burton 2013-03-27, 17:18