MySQLストアドプロシージャの問題です。警告が表示されます。理由を理解できない？

Question

私は、申請者のデータの挿入/更新アクションで動作するストアドプロシージャを持っています。更新アクションは正常に動作します。しかし、挿入照会にはerrorFlagが2として出てきます。これは警告を示します。私は警告が何であるか把握できません。

ここは私のSPです。

DELIMITER $$ 

DROP PROCEDURE IF EXISTS mydb.insertApplicant $$ 

CREATE PROCEDURE mydb.insertApplicant(

            IN appFirstName VARCHAR(128), 
            IN appLastName VARCHAR(128), 
            IN appEmail VARCHAR(128), 
            IN appPhone VARCHAR(16), 
            IN appZipcode VARCHAR(16), 
            IN appCity VARCHAR(32), 
            IN appState VARCHAR(32), 
            IN appCountry VARCHAR(32)) 
    MODIFIES SQL DATA 
BEGIN 

    DECLARE appAction VARCHAR(16) DEFAULT NULL; 
    DECLARE applicantId INTEGER DEFAULT 0; 
    DECLARE updateFlag INTEGER DEFAULT 0; 
    DECLARE errorFlag INTEGER DEFAULT 0; 
    DECLARE errorQuery VARCHAR(1024) DEFAULT NULL; 

    /* Set continue handler for sql exception */ 
    DECLARE CONTINUE HANDLER FOR SQLEXCEPTION 
    BEGIN 
     SET errorFlag = 1; 
    END; 

    /* Set continue handler for sql warning */ 
    DECLARE CONTINUE HANDLER FOR SQLWARNING 
    BEGIN 
     SET errorFlag = 2; 
    END; 

    /* Turn auto-commit off */ 
    SET AUTOCOMMIT = 0; 

    /* Start ttsnsaction */ 
    START TRANSACTION; 

    /* Set savepoint. If an error occurs, we will rollback to this point */ 
    SAVEPOINT Savepoint_S1; 

    MAIN_BLOCK:BEGIN 

     /* Check if applicant already exists */ 
     SELECT applicant_id INTO applicantId FROM tblApplicant WHERE email = appEmail; 

     /* If applicant already exists, then update applicant details */ 
     IF (applicantId) THEN 

      SET appAction = 'Update'; 

      /* Update applicant details */ 
      SET @sqlQuery = CONCAT("UPDATE tblApplicant SET ", 
      "first_name = '", appFirstName, "', last_name = '", appLastName, 
      "', update_date = NOW(), phone = '", appPhone, "', zipcode = '", appZipcode, 
      "', city = '", appCity, "', state = '", appState, 
      "', country = '", appCountry, "' WHERE applicant_id = '", applicantId, "'"); 

      PREPARE stmt FROM @sqlQuery; 
      EXECUTE stmt; 
      DEALLOCATE PREPARE stmt; 

      /* Set update flag to true */ 
      SET updateFlag = 1; 

     END IF; 

     IF(updateFlag <> 1) THEN 

      SET appAction = 'Insert'; 

      /* insert applicant details */ 
      SET @sqlQuery = CONCAT("INSERT INTO tblApplicant (first_name, last_name, email, reg_date, ", 
      "phone, zipcode, city, state, country) VALUES ('", 
      appFirstName, "', '", appLastName, "', '", appEmail, "', NOW(), '", 
     appPhone, "', '", appZipcode, "', '", appCity, "', '", appState, "', '", appCountry, "')"); 

      PREPARE stmt FROM @sqlQuery; 
      EXECUTE stmt; 
      DEALLOCATE PREPARE stmt; 

      /* Check if an error has occured */ 
      IF (errorFlag = 0) THEN 
       SELECT LAST_INSERT_ID() INTO applicantId; 
      END IF; 

     END IF; 

     /* Check if an error has occured */ 
     IF errorFlag THEN 
      ROLLBACK TO Savepoint_S1; 
      SELECT @sqlQuery INTO errorQuery; 
      LEAVE MAIN_BLOCK; 
     END IF; 

    END; /* MAIN_BLOCK ends here */ 

    /* Commit changes if any */ 
    COMMIT; 

    /* Turn auto-commit ON */ 
    SET AUTOCOMMIT = 1; 

    /* Select paramters */ 
    SELECT errorFlag, errorQuery, appAction, applicantId; 

END $$ 

DELIMITER ; 

Answer 1

利用GET DIAGNOSTICS

http://dev.mysql.com/doc/refman/5.6/en/get-diagnostics.html