Natively Connect to Avro Data in PHP

Drop the CData ODBC Driver for Avro into your LAMP or WAMP stack to build Avro-connected Web applications. This article shows how to use PHP's ODBC built-in functions to connect to Avro 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.

Connect to your local Avro file(s) by setting the URI connection property to the location of the Avro file.

Establish a Connection

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

$conn = odbc_connect("CData ODBC Avro 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.

$conn = odbc_pconnect("CData ODBC Avro Source","user","password");
...
odbc_close($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 SampleTable_1 WHERE Column2 = ?");

Execute Queries

Execute prepared statements with .

$conn = odbc_connect("CData ODBC Avro Source","user","password");
$query = odbc_prepare($conn, "SELECT * FROM SampleTable_1 WHERE Column2 = ?");
$success = odbc_execute($query, array('value_2'));
 

Execute nonparameterized queries with .

$conn = odbc_connect("CData ODBC Avro Source","user","password");
$query = odbc_exec($conn, "SELECT Id, Column1 FROM SampleTable_1 WHERE Column2 = 'value_2'");
 

Process Results

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

$conn = odbc_connect("CData ODBC Avro data Source","user","password");
$query = odbc_exec($conn, "SELECT Id, Column1 FROM SampleTable_1 WHERE Column2 = 'value_2'");
while($row = odbc_fetch_array($query)){
 echo $row["Id"] . "\n";
}

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

$conn = odbc_connect("CData ODBC Avro data Source","user","password");
$query = odbc_prepare($conn, "SELECT * FROM SampleTable_1 WHERE Column2 = ?");
$success = odbc_execute($query, array('value_2'));
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 Avro-specific adaptations of the PHP community documentation for all ODBC functions.