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Result consisted of more than one row
Posted by: Michael Peremsky
Date: March 18, 2014 06:49AM

I have a stored procedure that performs an INSERT on a table. That table has multiple DEFAULT values associated with columns. After I perform the insert I want to set the default values in OUT parameters. However, when I execute the JDBC call I get an exception with the message "Result consisted of more than one row".

If I remove the SELECT column INTO out_parameter FROM... the procedure will work as expected.

1. How can I modify the SP so that I can retrieve the default value from the column and set it in the OUT parameter to avoid this exception from being thrown?

2. [side question] Why is the second select returning a result set when I am setting it to a variable? Is there a way to prevent the additional result set?

Stored Procedure
CREATE PROCEDURE `INS_REQUESTDATA`(
	OUT RTN_VAL INTEGER,
	OUT DMS_REQUEST_ID INTEGER,
	IN P_STATUS VARCHAR(15),
	IN P_SRC_RQST_ID VARCHAR(128),
	IN P_REQUEST TEXT,
	IN P_RESULT TEXT,
	OUT P_CREATE_DATE TIMESTAMP,
	IN P_CREATE_USER VARCHAR(20),
	OUT P_MOD_DATE TIMESTAMP
)
BEGIN
   DECLARE TMP_TS TIMESTAMP DEFAULT CURRENT_TIMESTAMP;

   -- Declare an exit handler for a duplicate key constraint
   DECLARE EXIT HANDLER FOR SQLSTATE '23000' BEGIN SET RTN_VAL = -1; END;
   -- Declare an exit handler for a foreign key constraint
   DECLARE EXIT HANDLER FOR 1452 BEGIN SET RTN_VAL = -2; END;

   SET RTN_VAL = 0;
   SET DMS_REQUEST_ID = -1;

   INSERT INTO REQUESTDATA (status, src_rqst_id, request, result, create_date, 
         create_user, mod_date) 
   VALUES(P_STATUS, P_SRC_RQST_ID, P_REQUEST, P_RESULT, TMP_TS, P_CREATE_USER,
         P_MOD_DATE);

   SET DMS_REQUEST_ID = LAST_INSERT_ID();
   SET P_CREATE_DATE = TMP_TS;

   -- Removing this statement will remove the extra result set, but then I do not 
   -- have the default value in the OUT parameter
   SELECT mod_date 
   INTO P_MOD_DATE 
   FROM requestdata 
   WHERE dms_request_id = DMS_REQUEST_ID;

END

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