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Pig >> mail # user >> RE: Load table sorted by key

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Re: Load table sorted by key
Rows in HBase are sorted lexicographically, so that 1 precedes 10 and 100.

You need to
a) ORDER library BY id in Pig script or
b) pad your HBase rowkey with zeros e.g. 001, 010, 100, 101 before
loading it in Pig (but I will require re-write of the HBase table,
since each row can not be simply updated, but will have to be
re-insterted into the table)


> Hi,
> I have a table in hbase that I want to load all records sorted by row key which is an integer number.
> Here is my code:
> library = LOAD 'discovery_rnaseq_library' USING org.apache.pig.backend.hadoop.hbase.HBaseStorage('A:COMMON_NAME A:SCIENTIFIC_NAME A:GENETIC_BACKGROUND A:TISSUE,'-loadKey true') as (id:int, COMMON_NAME:chararray, SCIENTIFIC_NAME:chararray, GENETIC_BACKGROUND:chararray, TISSUE:chararray);
> I want it to be sorted based on (id:int) in increasing order. But, what it does is like this:
> 1              soybean               Glycine max       A3525    leaf
> 10           soybean               Glycine max       A3525    root
> 100         soybean               Glycine max       A3244    root
> 101         soybean               Glycine max       80% A3525 + 20% Opal
> ...
> I appreciate any help.
> -Zara
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