Natively Connect to HBase Data in PHP

Drop the CData ODBC Driver for HBase into your LAMP or WAMP stack to build HBase-connected Web applications. This article shows how to use PHP's ODBC built-in functions to connect to HBase data, execute queries, and output the results.

Configure a DSN

If you have not already, first specify connection properties in an ODBC DSN (data source name). This is the last step of the driver installation. You can use the Microsoft ODBC Data Source Administrator to create and configure ODBC DSNs.

Set the Port and Server to connect to Apache HBase.

Establish a Connection

Open the connection to HBase by calling the or methods. To close connections, use or .

$conn = odbc_connect("CData ODBC ApacheHBase Source","user","password");

Connections opened with are closed when the script ends. Connections opened with the method are still open after the script ends. This enables other scripts to share that connection when they connect with the same credentials. By sharing connections among your scripts, you can save system resources, and queries execute faster.

$conn = odbc_pconnect("CData ODBC ApacheHBase Source","user","password");
...
odbc_close($conn); //persistent connection must be closed explicitly

Create Prepared Statements

Create prepared statements and parameterized queries with the function.

$query = odbc_prepare($conn, "SELECT * FROM Customers WHERE ShipCity = ?");

Execute Queries

Execute prepared statements with .

$conn = odbc_connect("CData ODBC ApacheHBase Source","user","password");
$query = odbc_prepare($conn, "SELECT * FROM Customers WHERE ShipCity = ?");
$success = odbc_execute($query, array('New York'));
 

Execute nonparameterized queries with .

$conn = odbc_connect("CData ODBC ApacheHBase Source","user","password");
$query = odbc_exec($conn, "SELECT SUM(CustomerName), Price FROM Customers GROUP BY Price");
 

Process Results

Access a row in the result set as an array with the function.

$conn = odbc_connect("CData ODBC HBase data Source","user","password");
$query = odbc_exec($conn, "SELECT SUM(CustomerName), Price FROM Customers GROUP BY Price");
while($row = odbc_fetch_array($query)){
 echo $row["CustomerName"] . "\n";
}

Display the result set in an HTML table with the function.

$conn = odbc_connect("CData ODBC HBase data Source","user","password");
$query = odbc_prepare($conn, "SELECT * FROM Customers WHERE ShipCity = ?");
$success = odbc_execute($query, array('New York'));
if($success)
 odbc_result_all($query);

More Example Queries

You will find complete information on the driver's supported SQL in the help documentation. The code examples above are HBase-specific adaptations of the PHP community documentation for all ODBC functions.