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HBASE-3539 Improve shell help to reflect all possible options 

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1096533 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Michael Stack 2011-04-25 17:34:24 +00:00
parent b91fb30a82
commit e448a81053
3 changed files with 12 additions and 6 deletions
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2
CHANGES.txt
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@ -84,6 +84,8 @@ Release 0.91.0 - Unreleased
HBASE-3800 HMaster is not able to start due to AlreadyCreatedException
HBASE-3806 distributed log splitting double escapes task names
(Prakash Khemani)
HBASE-3539 Improve shell help to reflect all possible options
(Harsh J Chouraria)
IMPROVEMENTS
HBASE-3290 Max Compaction Size (Nicolas Spiegelberg via Stack)

2
src/main/ruby/shell/commands/get.rb
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@ -24,7 +24,7 @@ module Shell
def help
return <<-EOF
Get row or cell contents; pass table name, row, and optionally
a dictionary of column(s), timestamp and versions. Examples:
a dictionary of column(s), timestamp, timerange and versions. Examples:
hbase> get 't1', 'r1'
hbase> get 't1', 'r1', {TIMERANGE => [ts1, ts2]}

14
src/main/ruby/shell/commands/scan.rb
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@ -24,15 +24,19 @@ module Shell
def help
return <<-EOF
Scan a table; pass table name and optionally a dictionary of scanner
specifications. Scanner specifications may include one or more of
the following: LIMIT, STARTROW, STOPROW, TIMESTAMP, or COLUMNS. If
no columns are specified, all columns will be scanned. To scan all
members of a column family, leave the qualifier empty as in
'col_family:'. Examples:
specifications. Scanner specifications may include one or more of:
TIMERANGE, FILTER, LIMIT, STARTROW, STOPROW, TIMESTAMP, MAXLENGTH,
or COLUMNS. If no columns are specified, all columns will be scanned.
To scan all members of a column family, leave the qualifier empty as in
'col_family:'.
Some examples:
hbase> scan '.META.'
hbase> scan '.META.', {COLUMNS => 'info:regioninfo'}
hbase> scan 't1', {COLUMNS => ['c1', 'c2'], LIMIT => 10, STARTROW => 'xyz'}
hbase> scan 't1', {FILTER => org.apache.hadoop.hbase.filter.ColumnPaginationFilter.new(1, 0)}
hbase> scan 't1', {COLUMNS => 'c1', TIMERANGE => [1303668804, 1303668904]}
For experts, there is an additional option -- CACHE_BLOCKS -- which
switches block caching for the scanner on (true) or off (false). By