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I am using
scan 'table_name', { COLUMNS => 'column_family:column_qualifier', LIMIT => 2 }
to list 2 rows in a hbase table but I would like to know if it is possible to achieve following using hbase shell:
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A row key is a unique identifier for the table row. An HBase table is a multi-dimensional map comprised of one or more columns and rows of data. You specify the complete set of column families when you create an HBase table.
To insert data into an HBase table, the add() method and its variants are used. This method belongs to Put, therefore instantiate the put class. This class requires the row name you want to insert the data into, in string format. You can instantiate the Put class as shown below.
Put command, puts a cell 'value' at specified table/row/column and optionally timestamp coordinates. This command disables, drops and recreates the specified table. Make sure, the schema will be present but not the records, just after truncate of an HBase table.
A1. hbase(main):015:0> count 'table_name', INTERVAL => 1
A2. Use RowKey filter with SubstringComparator.
Usage :
hbase(main):003:0> import org.apache.hadoop.hbase.filter.CompareFilter
hbase(main):005:0> import org.apache.hadoop.hbase.filter.SubstringComparator
hbase(main):006:0> scan 'test', {FILTER => org.apache.hadoop.hbase.filter.RowFilter.new(CompareFilter::CompareOp.valueOf('EQUAL'),SubstringComparator.new("word_by_which_you_want_to_search"))}
KeyOnlyFilter - takes no arguments. Returns the key portion of each key-value pair.
Syntax: KeyOnlyFilter ()
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