Defining the Schema - HBase Essentials - page 29

Some of the other important methods deined in the Get class are stated in the
following table:

Method name Description

getFamilyMap() Method for retrieving the get method's

family map

getMaxResultsPerColumnFamily() Method for retrieving the get method's

maximum number of values to return per
column family

getCacheBlocks() Gets whether blocks should be cached for

this method

Updating data
Data updation in HBase is done in a manner that is similar to writing it. The new
data is updated in the table using a Put instance. The following is the sample code
for updating data in HBase:

// Get instance of Default Configuration
Configuration conf = HBaseConfiguration.create();

//Get table instance
HTable table = new HTable(conf, "tab1");

// Create Put with rowkey
Put put = new Put(Bytes.toBytes("row-1"));

// Update a column with value "Hello", in "cf1:greet", to the
// Put.
put.add(Bytes.toBytes("cf1"), Bytes.toBytes("greet"),
Bytes.toBytes("GoodMorning"));

// Update more column with value "David", in "cf1:person", to the //
Put.
put.add(Bytes.toBytes("cf1"), Bytes.toBytes("person"),
Bytes.toBytes("David"));

table.put(put);
table.close();