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From Ted Yu <yuzhih...@gmail.com>
Subject Re: Similar Column names in creation of HBase table
Date Thu, 23 Oct 2014 13:45:57 GMT
Interesting.

Using shell, I did:

hbase(main):001:0> create 't2', {NAME => 'f1'}, {NAME => 'f1'}

The table got created - with 1 column family:

hbase(main):002:0> describe 't2'
DESCRIPTION
                       ENABLED
 't2', {NAME => 'f1', DATA_BLOCK_ENCODING => 'NONE', BLOOMFILTER => 'ROW',
REPLICATION_SCOPE => '0 true
 ', VERSIONS => '1', COMPRESSION => 'NONE', MIN_VERSIONS => '0', TTL =>
'2147483647', KEEP_DELETED
 _CELLS => 'false', BLOCKSIZE => '65536', IN_MEMORY => 'false', BLOCKCACHE
=> 'true'}
1 row(s) in 0.1000 seconds

On Thu, Oct 23, 2014 at 1:27 AM, Sznajder ForMailingList <
bs4mailinglist@gmail.com> wrote:

> Hi
>
> Is it allowed to provide two similar family names during the creation of an
> HBase table?
>
> I was expecting that it is forbidden, **but** this call does not throw any
> exception
>
>         String[] families = {"cf", "cf"};
>         HTableDescriptor desc = new HTableDescriptor(name);
>         for (String cf : families) {
>           HColumnDescriptor coldef = new HColumnDescriptor(cf);
>           desc.addFamily(coldef);
>         }
>         try {
>             admin.createTable(desc);
>         } catch (TableExistsException e) {
>             throw new IOException("table \'" + name + "\' already exists");
>         }
>

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