ADO.NET Provider for Apache HBase

Build 21.0.7930

UPDATE Statements

To modify existing records, use UPDATE statements.

Update Syntax

The UPDATE statement takes as input a comma-separated list of columns and new column values as name-value pairs in the SET clause, as shown in the following example:

UPDATE <table_name> SET { <column_reference> = <expression> } [ , ... ] WHERE { Id = <expression>  } [ { AND | OR } ... ] 

<expression> ::=
  | @ <parameter> 
  | ?
  | <literal>
You can use the ExecuteNonQuery method to execute data manipulation commands and retrieve the rows affected, as shown in the following example:

C#

String connectionString = "Server=127.0.0.1;Port=8080;";
using (ApacheHBaseConnection connection = new ApacheHBaseConnection(connectionString)) {
  int rowsAffected;
  ApacheHBaseCommand cmd = new ApacheHBaseCommand("UPDATE Account SET Name='Floppy Disks' WHERE Id = @myId", connection);
  cmd.Parameters.Add(new ApacheHBaseParameter("myId","1"));
  rowsAffected = cmd.ExecuteNonQuery();
}

VB.NET

Dim connectionString As [String] = "Server=127.0.0.1;Port=8080;"
Using connection As New ApacheHBaseConnection(connectionString)
  Dim rowsAffected As Integer
  Dim cmd As New ApacheHBaseCommand("UPDATE Account SET Name='Floppy Disks' WHERE Id = @myId", connection)
  cmd.Parameters.Add(New ApacheHBaseParameter("myId", "1"))
  rowsAffected = cmd.ExecuteNonQuery()
End Using

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Build 21.0.7930