Natively Connect to HBase Data in PHP

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HBase ODBC Driver

The HBase ODBC Driver is a powerful tool that allows you to connect with Apache HBase columnar databases, directly from any applications that support ODBC connectivity.

Access HBase like you would a relational database - read, write, and update through a standard ODBC Driver interface.



The CData ODBC driver for HBase enables you to create PHP applications with connectivity to HBase data. Leverage the native support for ODBC 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 odbc_connect or odbc_pconnect methods. To close connections, use odbc_close or odbc_close_all.

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

Connections opened with odbc_connect are closed when the script ends. Connections opened with the odbc_pconnect 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 odbc_prepare function.

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

Execute Queries

Execute prepared statements with odbc_execute.

$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 odbc_exec.

$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 odbc_fetch_array 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 odbc_result_all 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.