gistfile1.txt

hbase(main):003:0> help 'ddl'    

TABLES MANAGEMENT COMMANDS
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COMMAND: alter
          Alter column family schema;  pass table name and a dictionary
          specifying new column family schema. Dictionaries are described
          on the main help command output. Dictionary must include name
          of column family to alter. For example,

          To change or add the 'f1' column family in table 't1' from defaults
          to instead keep a maximum of 5 cell VERSIONS, do:
          hbase> alter 't1', NAME => 'f1', VERSIONS => 5

          To delete the 'f1' column family in table 't1', do:
          hbase> alter 't1', NAME => 'f1', METHOD => 'delete'
          or a shorter version:
          hbase> alter 't1', 'delete' => 'f1'

          You can also change table-scope attributes like MAX_FILESIZE
          MEMSTORE_FLUSHSIZE, READONLY, and DEFERRED_LOG_FLUSH.

          For example, to change the max size of a family to 128MB, do:
          hbase> alter 't1', METHOD => 'table_att', MAX_FILESIZE => '134217728'

          There could be more than one alteration in one command:
          hbase> alter 't1', {NAME => 'f1'}, {NAME => 'f2', METHOD => 'delete'}

COMMAND: create
          Create table; pass table name, a dictionary of specifications per
          column family, and optionally a dictionary of table configuration.
          Dictionaries are described below in the GENERAL NOTES section.
          Examples:

          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}

COMMAND: describe
          Describe the named table. For example:
            hbase> describe 't1'

COMMAND: disable
          Disable the named table: e.g. "hbase> disable 't1'"

COMMAND: drop
          Drop the named table. Table must first be disabled. If table has
          more than one region, run a major compaction on .META.:

          hbase> major_compact ".META."

COMMAND: enable
          Enable the named table: e.g. "hbase> enable 't1'"

COMMAND: exists
          Does the named table exist? e.g. "hbase> exists 't1'"

COMMAND: list
          List all tables in hbase

hbase(main):004:0>