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https://issues.apache.org/jira/browse/HBASE-4022?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13054092#comment-13054092
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Lars George commented on HBASE-4022:
------------------------------------
I also tried "\x20cf:1" etc. to no avail.
> Shell reports error on space prefixed colfam name
> -------------------------------------------------
>
> Key: HBASE-4022
> URL: https://issues.apache.org/jira/browse/HBASE-4022
> Project: HBase
> Issue Type: Bug
> Reporter: Lars George
> Priority: Minor
>
> See this test:
> {noformat}
> hbase(main):002:0> create 'test', ' cf'
> hbase(main):003:0> scan 'test'
> ROW COLUMN+CELL
>
>
> 0 row(s) in 0.1050 seconds
> hbase(main):004:0> describe 'test'
> DESCRIPTION
> ENABLED
>
> {NAME => 'test', FAMILIES => [{NAME => ' cf', BLOOMFILTER => 'NONE',
> REPLICATION_SCOPE => '0', COMPRESSION => 'NO true
>
> NE', VERSIONS => '3', TTL => '2147483647', BLOCKSIZE => '65536', IN_MEMORY =>
> 'false', BLOCKCACHE => 'true'}]}
>
> 1 row(s) in 0.0540 seconds
> hbase(main):005:0> put 'test', 'r1', ' cf:1', 'v1'
> 0 row(s) in 0.0580 seconds
> hbase(main):006:0> scan 'test', { COLUMNS => [' cf'] }
> ROW COLUMN+CELL
>
>
> ERROR: Unknown column family! Valid column names: cf
> Here is some help for this command:
> Scan a table; pass table name and optionally a dictionary of scanner
> 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
> default it is enabled. Examples:
> hbase> scan 't1', {COLUMNS => ['c1', 'c2'], CACHE_BLOCKS => false}
> 8:57 PM
> haha
> 8:58 PM
> hbase(main):008:0> scan 'test'
> ROW COLUMN+CELL
>
>
> r1 column= cf:1,
> timestamp=1308855379447, value=v1
>
> 1 row(s) in 0.0450 seconds
> {noformat}
> We should handle this better.
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