How to Call Curl Command From Oracle Plsql?

To call the curl command from Oracle PL/SQL, you can use the DBMS_SCHEDULER package to execute an external shell script that contains the curl command. First, create a shell script with the curl command that you want to execute. Next, create a job in the Oracle database using the DBMS_SCHEDULER package, and set the job type as 'EXECUTABLE' to run the shell script. Finally, schedule the job to run at the desired time interval or frequency. This way, you can call the curl command from Oracle PL/SQL by executing the shell script through the DBMS_SCHEDULER package.

How to handle timeouts in curl command in PL/SQL?

In PL/SQL, you can handle timeouts in a curl command by using the DBMS_SCHEDULER package to execute the curl command within a scheduler job. You can set the timeout for the job using the MAX_RUN_DURATION parameter. Here's an example of how you can do this:

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15

DECLARE
  v_jobname VARCHAR2(100) := 'curl_job';
BEGIN
  DBMS_SCHEDULER.create_job(
    job_name => v_jobname,
    job_type => 'EXECUTABLE',
    job_action => 'curl http://example.com',
    enabled => TRUE,
    auto_drop => TRUE,
    max_run_duration => INTERVAL '10' SECOND
  );

  DBMS_SCHEDULER.run_job(v_jobname);
END;
/

In this example, the curl command curl http://example.com will be executed within a scheduler job named curl_job, and the job will have a maximum run duration of 10 seconds. This means that if the curl command does not complete within 10 seconds, the job will be automatically terminated.

You can customize the curl command and the timeout duration based on your requirements.

How does the syntax for calling curl command in PL/SQL look like?

To call a curl command in PL/SQL, you can use the UTL_HTTP package which provides procedures for making HTTP requests. Here is an example of how you can use UTL_HTTP to make a simple GET request:

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21

DECLARE
  l_http_request   UTL_HTTP.REQ;
  l_http_response  UTL_HTTP.RESP;
  l_response_text  VARCHAR2(32767);
BEGIN
  l_http_request := UTL_HTTP.BEGIN_REQUEST('http://example.com');
  l_http_response := UTL_HTTP.GET_RESPONSE(l_http_request);
  
  BEGIN
    LOOP
      UTL_HTTP.READ_TEXT(l_http_response, l_response_text);
      DBMS_OUTPUT.PUT_LINE(l_response_text);
    END LOOP;
  EXCEPTION
    WHEN UTL_HTTP.END_OF_BODY THEN
      NULL;
  END;
  
  UTL_HTTP.END_RESPONSE(l_http_response);
END;
/

This code snippet demonstrates how to make a GET request to http://example.com using UTL_HTTP. You can modify the URL and add headers or other options as needed for your specific curl command.

What is the maximum length of the curl command that can be executed in PL/SQL?

In PL/SQL, the maximum length of a command that can be executed depends on the underlying operating system and the specific limitations of the command processor (such as the maximum command line length allowed). Typically, the maximum length of a command that can be executed may vary from system to system, but it is generally in the range of several thousand characters.

However, it is generally recommended to keep the length of the command as short as possible for better readability and maintainability. If you find yourself needing to execute very long commands, you may want to consider breaking them up into smaller, more manageable chunks or using scripts or stored procedures to handle complex logic.

How to call curl command from Oracle PL/SQL?

To call the curl command from Oracle PL/SQL, you can use the built-in UTL_HTTP package in Oracle. Here's an example of how you can use UTL_HTTP to make a curl request in PL/SQL:

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15

DECLARE 
   l_url         VARCHAR2(4000) := 'http://example.com/api/resource';
   l_request     UTL_HTTP.REQ;
   l_response    UTL_HTTP.RESP;
   l_response_text VARCHAR2(32767);
BEGIN
   l_request := UTL_HTTP.BEGIN_REQUEST(url => l_url, method => 'GET');
   l_response := UTL_HTTP.GET_RESPONSE(l_request);
   UTL_HTTP.READ_TEXT(l_response, l_response_text);
   
   DBMS_OUTPUT.PUT_LINE(l_response_text);
   
   UTL_HTTP.END_RESPONSE(l_response);
END;
/

In the above example, replace 'http://example.com/api/resource' with the actual URL you want to make the curl request to. This code snippet sends a GET request to the specified URL and prints the response text to the console.

Make sure that your Oracle database has the necessary privileges to make external network requests and that the UTL_HTTP package is enabled. Additionally, you may need to set up a wallet in Oracle if SSL/TLS is required for the curl request.