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From "Jerry He (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-10389) Add namespace help info in table related shell commands
Date Tue, 21 Jan 2014 00:33:19 GMT
Jerry He created HBASE-10389:

             Summary: Add namespace help info in table related shell commands
                 Key: HBASE-10389
                 URL: https://issues.apache.org/jira/browse/HBASE-10389
             Project: HBase
          Issue Type: Improvement
          Components: shell
    Affects Versions: 0.96.1, 0.96.0
            Reporter: Jerry He
             Fix For: 0.98.0, 0.96.2

Currently in the help info of table related shell command, we don't mention or give namespace
as part of the table name.  
For example, to create table:

hbase(main):001:0> help 'create'
Creates a table. Pass a table name, and a set of column family
specifications (at least one), and, optionally, table configuration.
Column specification can be a simple string (name), or a dictionary
(dictionaries are described below in main help output), necessarily
including NAME attribute.

  hbase> create 't1', {NAME => 'f1', VERSIONS => 5}
  hbase> create 't1', {NAME => 'f1'}, {NAME => 'f2'}, {NAME => 'f3'}
  hbase> # The above in shorthand would be the following:
  hbase> create 't1', 'f1', 'f2', 'f3'
  hbase> create 't1', {NAME => 'f1', VERSIONS => 1, TTL => 2592000, BLOCKCACHE
=> true}
  hbase> create 't1', {NAME => 'f1', CONFIGURATION => {'hbase.hstore.blockingStoreFiles'
=> '10'}}

Table configuration options can be put at the end.

  hbase> create 't1', 'f1', SPLITS => ['10', '20', '30', '40']
  hbase> create 't1', 'f1', SPLITS_FILE => 'splits.txt', OWNER => 'johndoe'
  hbase> create 't1', {NAME => 'f1', VERSIONS => 5}, METADATA => { 'mykey' =>
'myvalue' }
  hbase> # Optionally pre-split the table into NUMREGIONS, using
  hbase> # SPLITALGO ("HexStringSplit", "UniformSplit" or classname)
  hbase> create 't1', 'f1', {NUMREGIONS => 15, SPLITALGO => 'HexStringSplit'}
  hbase> create 't1', 'f1', {NUMREGIONS => 15, SPLITALGO => 'HexStringSplit', CONFIGURATION
=> {'hbase.hregion.scan.loadColumnFamiliesOnDemand' => 'true'}}

You can also keep around a reference to the created table:

  hbase> t1 = create 't1', 'f1'

Which gives you a reference to the table named 't1', on which you can then
call methods.

We should document the usage of namespace in these commands.
For example:

#namespace=foo and table qualifier=bar
create 'foo:bar', 'fam'

#namespace=default and table qualifier=bar
create 'bar', 'fam'

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