Error handling in PL SQL

CREATE OR REPLACE PROCEDURE   SP_EXCEPTION_HANDLING
AS
-- Decalre required variables
L_DOC_DTLS VARCHAR2(4000);
L_ERROR_LINE VARCHAR2(8000);
L_ERROR_MSG VARCHAR2(8000);
 
BEGIN


/*Your procedure code goes here*/   


-- Error handling      
EXCEPTION
      WHEN OTHERS THEN
        
        -- Required parameters for identfying the issue
        L_DOC_DTLS := P_COMPANY_POID || P_PARTY_POID|| P_CHARGE_POID;
        
        -- Error details
        L_ERROR_LINE := DBMS_UTILITY.FORMAT_ERROR_STACK ||' at line ' || $$PLSQL_LINE || ' ERROR_BACKTRACE: ' || L_DOC_DTLS || DBMS_UTILITY.FORMAT_ERROR_BACKTRACE;
        L_ERROR_MSG := SQLERRM; 
        
        -- For logging the error details in GLOBAL_EXCEPTIONS_DATA table.
        -- Parameters to PROC_GLOBAL_EXCEPTIONS_DATA: P_DOC_ID, P_DOC_KEY_POID, P_USER_POID, P_PROC_NAME, P_DEBUG_DATA 
        PROC_GLOBAL_EXCEPTIONS_DATA( P_DOC_ID, P_DOC_KEY_POID, P_USER_POID, 'PROCEDURE_NAME', L_DOC_DTLS || L_ERROR_LINE|| L_ERROR_MSG) ;
        
        -- Send error details via email, if required.
        -- Default email will go to the ADMIN_USER_EMAIL_IDS group defined in the parameter table.
        --    PROC_GLOBAL_MAIL_FORMATTED(NULL, NULL, 'Error In procedure',
        --    'Some error occurred in PROCEDURE_NAME', 'PROCEDURE_NAME', 'ERROR : ' || L_DOC_DTLS || L_ERROR_LINE|| L_ERROR_MSG, NULL);

END;