SET PATH *LIBL ; 

CREATE OR REPLACE FUNCTION RESTAPI.SFP_GET_HOURLY_DOWNTIME ( 
	IN_PARM CLOB(2147483647) ) 
	RETURNS CLOB(2147483647)   
	LANGUAGE SQL 
	SPECIFIC RESTAPI.SFP_GET_HOURLY_DOWNTIME 
	NOT DETERMINISTIC 
	MODIFIES SQL DATA 
	CALLED ON NULL INPUT 
	SET OPTION  ALWBLK = *ALLREAD , 
	ALWCPYDTA = *OPTIMIZE , 
	COMMIT = *NONE , 
	DECRESULT = (31, 31, 00) , 
	DLYPRP = *NO , 
	DYNDFTCOL = *NO , 
	DYNUSRPRF = *USER , 
	SRTSEQ = *HEX   
	BEGIN 
DECLARE ENV VARCHAR ( 20 ) DEFAULT '' ; 
DECLARE V_DATE DATE ; 
DECLARE V_DATE_STR VARCHAR ( 10 ) DEFAULT '' ; 
DECLARE V_WC VARCHAR ( 5 ) DEFAULT '' ; 
DECLARE V_SITE VARCHAR ( 3 ) DEFAULT '' ; 
DECLARE V_DATE_CY DECIMAL ( 7 , 0 ) DEFAULT 0 ; 
DECLARE V_DATE_PRIOR_CY DECIMAL ( 7 , 0 ) DEFAULT 0 ; 
DECLARE LL VARCHAR ( 1024 ) DEFAULT '' ; 
DECLARE V_IN_PARM CLOB ( 2 G ) DEFAULT '' ; 
-- Error handling variables 
DECLARE V_SQLSTATE CHAR ( 5 ) DEFAULT '00000' ; 
DECLARE V_SQLCODE INTEGER DEFAULT 0 ; 
DECLARE V_ERRMSG VARCHAR ( 500 ) DEFAULT '' ; 
DECLARE V_HTTP_STATUS INTEGER DEFAULT 200 ; 
DECLARE V_HAS_ERROR INTEGER DEFAULT 0 ; 
-- Continue handlers for error capture 
DECLARE CONTINUE HANDLER FOR SQLSTATE '22007'  -- Invalid datetime 
BEGIN 
SET V_SQLSTATE = '22007' ; 
GET DIAGNOSTICS CONDITION 1 V_ERRMSG = MESSAGE_TEXT ; 
SET V_HTTP_STATUS = 400 ; 
SET V_HAS_ERROR = 1 ; 
END ; 
DECLARE CONTINUE HANDLER FOR SQLSTATE '22003'  -- Numeric out of range 
BEGIN 
SET V_SQLSTATE = '22003' ; 
GET DIAGNOSTICS CONDITION 1 V_ERRMSG = MESSAGE_TEXT ; 
SET V_HTTP_STATUS = 400 ; 
SET V_HAS_ERROR = 1 ; 
END ; 
DECLARE CONTINUE HANDLER FOR SQLSTATE '02000'  -- No data found 
BEGIN 
SET V_SQLSTATE = '02000' ; 
SET V_ERRMSG = 'No data found for the specified criteria' ; 
SET V_HTTP_STATUS = 404 ; 
SET V_HAS_ERROR = 1 ; 
END ; 
DECLARE CONTINUE HANDLER FOR SQLSTATE '42501'  -- Not authorized 
BEGIN 
SET V_SQLSTATE = '42501' ; 
GET DIAGNOSTICS CONDITION 1 V_ERRMSG = MESSAGE_TEXT ; 
SET V_HTTP_STATUS = 403 ; 
SET V_HAS_ERROR = 1 ; 
END ; 
DECLARE CONTINUE HANDLER FOR SQLSTATE '42704'  -- Object not found 
BEGIN 
SET V_SQLSTATE = '42704' ; 
GET DIAGNOSTICS CONDITION 1 V_ERRMSG = MESSAGE_TEXT ; 
SET V_HTTP_STATUS = 404 ; 
SET V_HAS_ERROR = 1 ; 
END ; 
DECLARE CONTINUE HANDLER FOR SQLEXCEPTION 
BEGIN 
GET DIAGNOSTICS CONDITION 1 
V_SQLSTATE = RETURNED_SQLSTATE , 
V_SQLCODE = DB2_RETURNED_SQLCODE , V_ERRMSG = MESSAGE_TEXT ; 
SET V_HTTP_STATUS = 500 ; 
SET V_HAS_ERROR = 1 ; 
END ; 
-- Parse input parameters first (before env extraction modifies In_Parm) 
SET V_DATE_STR = COALESCE ( JSON_VALUE ( IN_PARM , '$.date' ) , '' ) ; 
SET V_WC = COALESCE ( JSON_VALUE ( IN_PARM , '$.workcenter' ) , '' ) ; 
SET V_SITE = COALESCE ( JSON_VALUE ( IN_PARM , '$.site' ) , '' ) ; 
-- Parse date - set to Current_Date if not provided 
IF V_DATE_STR <> '' THEN 
SET V_DATE = DATE ( V_DATE_STR ) ; 
ELSE 
SET V_DATE = CURRENT_DATE ; 
END IF ; 
-- Extract env handling all input formats (object, array, string) 
SET V_IN_PARM = IN_PARM ; 
WHILE CISTOOLS . JSON_TYPE ( V_IN_PARM ) IN ( 'object' , 'array' , 'string' ) 
DO 
SET V_IN_PARM = 
CASE CISTOOLS . JSON_TYPE ( V_IN_PARM ) 
WHEN 'object' THEN JSON_VALUE ( V_IN_PARM , '$.env' ) 
WHEN 'array' THEN JSON_VALUE ( V_IN_PARM , '$[0]' ) 
WHEN 'string' THEN REPLACE ( V_IN_PARM , '"' , '' ) 
ELSE TRIM ( V_IN_PARM ) 
END ; 
END WHILE ; 
SET ENV = V_IN_PARM ; 
SET LL = CISTOOLS . SET_LIBRARY_LIST ( ENV ) ; 
-- Validate environment was set 
IF ENV = '' 
OR ENV IS NULL THEN 
RETURN 
JSON_OBJECT ( 
'error' : JSON_OBJECT ( 
'http_status' : 400 , 'sqlstate' : '22001' , 
'message' : 'Environment parameter is required' 
) 
) ; 
END IF ; 
-- Check for errors from library list setup 
IF V_HAS_ERROR = 1 THEN 
RETURN 
JSON_OBJECT ( 
'error' : JSON_OBJECT ( 
'http_status' : V_HTTP_STATUS , 'sqlstate' : V_SQLSTATE , 
'message' : V_ERRMSG 
) 
) ; 
END IF ; 
-- Calculate CYYMMDD dates 
SET V_DATE_CY = ZONED ( V_DATE ) - 19000000 ; 
SET V_DATE_PRIOR_CY = ZONED ( V_DATE - 1 DAY ) - 19000000 ; 
RETURN 
WITH 
-- Get Down Begin transactions 
DOWN_BEGIN AS ( 
SELECT T . ORDNO , T . CLDT , T . OPSEQ , T . EMPNO , T . BADGE , T . WKCTR , 
T . TDATE AS DB_DATE , T . TTIME AS DB_TIME , 
CAST ( 
CAST ( T . RECD AS VARCHAR ( 6 ) CCSID 37 ) AS VARCHAR ( 6 ) 
CCSID 1208 ) AS REASON_CODE , T . ITNBR , 
COALESCE ( T . EMPNO , T . BADGE ) AS EMP_KEY , M . STID , 
TO_DATE ( 
ZONED ( CISTOOLS . CYMD2DATE ( T . TDATE ) ) || 
LPAD ( T . TTIME , 6 , '0' ) , 'YYYYMMDDHH24MISS' ) 
AS DB_TS , 
ROW_NUMBER ( ) OVER ( 
PARTITION BY T . ORDNO , T . OPSEQ , COALESCE ( 
T . EMPNO , T . BADGE ) 
ORDER BY T . TDATE , T . TTIME 
) AS SEQ 
FROM MOTRAN T 
JOIN MOMAST M 
ON T . ORDNO = M . ORDNO 
WHERE T . TCODE = 'DB' 
AND T . WKCTR = COALESCE ( NULLIF ( V_WC , '' ) , T . WKCTR ) 
AND M . STID = COALESCE ( NULLIF ( V_SITE , '' ) , M . STID ) 
AND T . ACREC = 'A' 
AND T . TDATE BETWEEN V_DATE_PRIOR_CY AND V_DATE_CY 
) , 
-- Get Down End transactions 
DOWN_END AS ( 
SELECT T . ORDNO , T . CLDT , T . OPSEQ , T . EMPNO , T . BADGE , 
T . TDATE AS DE_DATE , T . TTIME AS DE_TIME , T . WKCTR , 
COALESCE ( T . EMPNO , T . BADGE ) AS EMP_KEY , M . STID , 
TO_DATE ( 
ZONED ( CISTOOLS . CYMD2DATE ( T . TDATE ) ) || 
LPAD ( T . TTIME , 6 , '0' ) , 'YYYYMMDDHH24MISS' ) 
AS DE_TS , 
ROW_NUMBER ( ) OVER ( 
PARTITION BY T . ORDNO , T . OPSEQ , COALESCE ( 
T . EMPNO , T . BADGE ) 
ORDER BY T . TDATE , T . TTIME 
) AS SEQ 
FROM MOTRAN T 
JOIN MOMAST M 
ON T . ORDNO = M . ORDNO 
WHERE T . TCODE = 'DE' 
AND T . WKCTR = COALESCE ( NULLIF ( V_WC , '' ) , T . WKCTR ) 
AND M . STID = COALESCE ( NULLIF ( V_SITE , '' ) , M . STID ) 
AND T . ACREC = 'A' 
AND T . TDATE = V_DATE_CY 
) , 
-- Current time as default end time 
CURRENT_END AS ( 
SELECT 
CASE 
WHEN V_DATE = CURRENT_DATE THEN CURRENT_TIMESTAMP 
ELSE 
TO_DATE ( 
ZONED ( V_DATE ) || '235959' , 'YYYYMMDDHH24MISS' ) 
END AS DEFAULT_END_TS 
FROM SYSIBM . SYSDUMMY1 
) , 
-- Match DB with DE 
MATCHED_DOWN AS ( 
SELECT DB . ORDNO , DB . ITNBR , DB . REASON_CODE , DB . WKCTR , DB . STID , 
DB . DB_DATE , DB . DB_TIME , DB . DB_TS AS START_TS , 
COALESCE ( DE . DE_TS , CE . DEFAULT_END_TS ) AS END_TS , 
COALESCE ( DE . DE_DATE , V_DATE_CY ) AS DE_DATE , 
COALESCE ( 
DE . DE_TIME , 
CASE 
WHEN 
V_DATE = CURRENT_DATE 
THEN ZONED ( CURRENT_TIME ) 
ELSE 235959 
END ) AS DE_TIME , 
COALESCE ( R . KDSCHED , 'N' ) AS IS_SCHEDULED , 
COALESCE ( R . KDRDESC , 'Unknown' ) AS REASON_DESC 
FROM DOWN_BEGIN DB 
CROSS JOIN CURRENT_END CE 
LEFT JOIN DOWN_END DE 
ON DB . ORDNO = DE . ORDNO 
AND DB . OPSEQ = DE . OPSEQ 
AND DB . EMP_KEY = DE . EMP_KEY 
AND DB . SEQ = DE . SEQ 
AND DB . WKCTR = DE . WKCTR 
AND DB . STID = DE . STID 
LEFT JOIN SFCDWR R 
ON DB . REASON_CODE = R . KDREASN 
) , 
-- Get distinct workcenter/site combinations 
WC_SITE_LIST AS ( 
SELECT DISTINCT WKCTR , STID 
FROM MATCHED_DOWN 
) , 
-- Generate hours for the date (0-23) with proper timestamps 
ALL_HOURS AS ( 
SELECT HR AS HOUR_NUM , 
TO_DATE ( 
ZONED ( V_DATE ) || LPAD ( HR * 10000 , 6 , '0' ) , 
'YYYYMMDDHH24MISS' ) AS HR_START_TS , 
CASE 
WHEN 
HR = 23 
THEN 
TO_DATE ( 
ZONED ( V_DATE + 1 DAY ) || '000000' , 
'YYYYMMDDHH24MISS' ) 
ELSE 
TO_DATE ( 
ZONED ( V_DATE ) || 
LPAD ( ( HR + 1 ) * 10000 , 6 , '0' ) , 
'YYYYMMDDHH24MISS' ) 
END AS HR_END_TS 
FROM ( 
VALUES ( 0 ) , ( 1 ) , ( 2 ) , ( 3 ) , ( 4 ) , ( 5 ) , ( 6 ) , ( 7 ) , ( 8 ) ,( 9 ) , ( 10 ) , ( 11 ) , ( 12 ) , ( 13 ) , ( 14 ) , ( 15 ) , 
( 16 ) , ( 17 ) , ( 18 ) , ( 19 ) , ( 20 ) , ( 21 ) , ( 22 ) , 
( 23 ) 
) T ( HR ) 
) , 
-- Break down by hour 
HOURLY_DOWN AS ( 
SELECT D . REASON_CODE , D . REASON_DESC , D . IS_SCHEDULED , D . ORDNO , 
D . ITNBR , D . WKCTR , D . STID , H . HOUR_NUM , 
GREATEST ( 
0 , TIMESTAMPDIFF ( 
2 , CHAR ( 
LEAST ( D . END_TS , H . HR_END_TS ) - 
GREATEST ( D . START_TS , H . HR_START_TS ) ) ) ) 
AS SECONDS_IN_HR 
FROM MATCHED_DOWN D , ALL_HOURS H 
WHERE D . START_TS < H . HR_END_TS 
AND D . END_TS > H . HR_START_TS 
) , 
-- Aggregate by hour, workcenter, site 
HOURLY_AGG AS ( 
SELECT HOUR_NUM , WKCTR , STID , SUM ( 
CASE 
WHEN IS_SCHEDULED = 'Y' THEN SECONDS_IN_HR 
ELSE 0 
END ) AS SCHED_DOWN_SEC , SUM ( 
CASE 
WHEN IS_SCHEDULED <> 'Y' THEN SECONDS_IN_HR 
ELSE 0 
END ) AS UNSCHED_DOWN_SEC , 
SUM ( SECONDS_IN_HR ) AS TOTAL_DOWN_SEC , 
COUNT ( DISTINCT REASON_CODE ) AS REASON_COUNT 
FROM HOURLY_DOWN 
WHERE SECONDS_IN_HR > 0 
GROUP BY HOUR_NUM , WKCTR , STID 
) , 
-- Get distinct reasons per hour/wkctr/stid 
HOURLY_REASONS AS ( 
SELECT DISTINCT HOUR_NUM , WKCTR , STID , REASON_CODE , 
REASON_DESC , IS_SCHEDULED 
FROM HOURLY_DOWN 
WHERE SECONDS_IN_HR > 0 
) , 
-- Aggregate reasons into JSON array 
HOURLY_REASONS_AGG AS ( 
SELECT HOUR_NUM , WKCTR , STID , 
JSON_ARRAYAGG ( 
JSON_OBJECT ( 
'reasonCode' : TRIM ( REASON_CODE ) , 
'description' : TRIM ( REASON_DESC ) , 'isScheduled' : 
CASE 
WHEN IS_SCHEDULED = 'Y' THEN 'true' 
ELSE 'false' 
END FORMAT JSON 
) FORMAT JSON 
) AS REASONS 
FROM HOURLY_REASONS 
GROUP BY HOUR_NUM , WKCTR , STID 
) , 
-- Cross join hours with workcenter/site list, then left join aggregated data 
HOURLY_FULL AS ( 
SELECT A . HOUR_NUM , W . WKCTR , W . STID , 
COALESCE ( H . SCHED_DOWN_SEC , 0 ) AS SCHED_DOWN_SEC , 
COALESCE ( H . UNSCHED_DOWN_SEC , 0 ) AS UNSCHED_DOWN_SEC , 
COALESCE ( H . TOTAL_DOWN_SEC , 0 ) AS TOTAL_DOWN_SEC , 
COALESCE ( H . REASON_COUNT , 0 ) AS REASON_COUNT , 
R . REASONS AS REASONS , 
SUM ( COALESCE ( H . SCHED_DOWN_SEC , 0 ) ) OVER ( 
PARTITION BY W . WKCTR , W . STID 
ORDER BY A . HOUR_NUM ROWS UNBOUNDED PRECEDING 
) AS CUM_SCHED , 
SUM ( COALESCE ( H . UNSCHED_DOWN_SEC , 0 ) ) OVER ( 
PARTITION BY W . WKCTR , W . STID 
ORDER BY A . HOUR_NUM ROWS UNBOUNDED PRECEDING 
) AS CUM_UNSCHED 
FROM ALL_HOURS A 
CROSS JOIN WC_SITE_LIST W 
LEFT JOIN HOURLY_AGG H 
ON A . HOUR_NUM = H . HOUR_NUM 
AND W . WKCTR = H . WKCTR 
AND W . STID = H . STID 
LEFT JOIN HOURLY_REASONS_AGG R 
ON A . HOUR_NUM = R . HOUR_NUM 
AND W . WKCTR = R . WKCTR 
AND W . STID = R . STID 
) , 
-- Reason summary per workcenter/site 
REASON_SUMMARY AS ( 
SELECT WKCTR , STID , REASON_CODE , REASON_DESC , IS_SCHEDULED , 
SUM ( SECONDS_IN_HR ) AS TOTAL_SECONDS , 
INT ( SUM ( SECONDS_IN_HR ) / 60 ) AS TOTAL_MINUTES 
FROM HOURLY_DOWN 
WHERE SECONDS_IN_HR > 0 
GROUP BY WKCTR , STID , REASON_CODE , REASON_DESC , 
IS_SCHEDULED 
) , 
-- Aggregate reason summary into JSON 
REASON_SUMMARY_AGG AS ( 
SELECT WKCTR , STID , 
JSON_ARRAYAGG ( 
JSON_OBJECT ( 
'reasonCode' : TRIM ( REASON_CODE ) , 
'description' : TRIM ( REASON_DESC ) , 'isScheduled' : 
CASE 
WHEN IS_SCHEDULED = 'Y' THEN 'true' 
ELSE 'false' 
END FORMAT JSON , 'totalMinutes' : TOTAL_MINUTES 
) FORMAT JSON 
) AS REASONS 
FROM REASON_SUMMARY 
GROUP BY WKCTR , STID 
) , 
-- Build hour JSON objects 
JSON_HOURS AS ( 
SELECT WKCTR , STID , 
JSON_OBJECT ( 
'hour' : HOUR_NUM , 'hourLabel' : 
CASE 
WHEN HOUR_NUM = 0 THEN '12AM' 
WHEN 
HOUR_NUM < 12 THEN VARCHAR ( HOUR_NUM ) || 'AM' 
WHEN HOUR_NUM = 12 THEN '12PM' 
ELSE VARCHAR ( HOUR_NUM - 12 ) || 'PM' 
END , 'scheduledDownMinutes' : INT ( 
SCHED_DOWN_SEC / 60 ) , 
'unscheduledDownMinutes' : INT ( 
UNSCHED_DOWN_SEC / 60 ) , 'totalDownMinutes' : INT ( 
TOTAL_DOWN_SEC / 60 ) , 
'cumulativeScheduledMinutes' : INT ( CUM_SCHED / 60 ) , 
'cumulativeUnscheduledMinutes' : INT ( 
CUM_UNSCHED / 60 ) , 'reasonCount' : REASON_COUNT , 
'reasons' : COALESCE ( REASONS , JSON_ARRAY ( ) ) FORMAT 
JSON 
) AS HOUR_OBJ , HOUR_NUM 
FROM HOURLY_FULL 
) , 
-- Calculate totals per workcenter/site 
WC_TOTALS AS ( 
SELECT WKCTR , STID , MAX ( CUM_SCHED ) AS TOTAL_SCHED_SEC , 
MAX ( CUM_UNSCHED ) AS TOTAL_UNSCHED_SEC , 
MAX ( CUM_SCHED ) + MAX ( CUM_UNSCHED ) AS TOTAL_DOWN_SEC 
FROM HOURLY_FULL 
GROUP BY WKCTR , STID 
) , 
-- Build workcenter JSON objects with nested hours array 
JSON_WORKCENTERS AS ( 
SELECT 
JSON_OBJECT ( 
'workcenter' : CAST ( 
CAST ( T . WKCTR AS VARCHAR ( 5 ) CCSID 37 ) AS VARCHAR ( 
5 ) CCSID 1208 ) , 'site' : CAST ( 
CAST ( T . STID AS VARCHAR ( 3 ) CCSID 37 ) AS VARCHAR ( 3 ) 
CCSID 1208 ) , 'hours' : ( SELECT JSON_ARRAYAGG ( 
H . HOUR_OBJ FORMAT JSON 
ORDER BY H . HOUR_NUM 
) 
FROM JSON_HOURS H 
WHERE H . WKCTR = T . WKCTR 
AND H . STID = T . STID ) FORMAT JSON , 
'reasons' : COALESCE ( ( SELECT RS . REASONS 
FROM REASON_SUMMARY_AGG RS 
WHERE RS . WKCTR = T . WKCTR 
AND RS . STID = T . STID ) , JSON_ARRAY ( ) ) 
FORMAT JSON , 'totals' : JSON_OBJECT ( 
'scheduledDownMinutes' : INT ( 
COALESCE ( T . TOTAL_SCHED_SEC , 0 ) / 60 ) , 
'unscheduledDownMinutes' : INT ( 
COALESCE ( T . TOTAL_UNSCHED_SEC , 0 ) / 60 ) , 
'totalDownMinutes' : INT ( 
COALESCE ( T . TOTAL_DOWN_SEC , 0 ) / 60 ) , 
'availableMinutes' : 1440 - 
INT ( COALESCE ( T . TOTAL_DOWN_SEC , 0 ) / 60 ) 
) 
) AS WC_OBJ 
FROM WC_TOTALS T 
ORDER BY T . WKCTR , T . STID ) SELECT JSON_ARRAY ( 
JSON_OBJECT ( 
'date' : TO_CHAR ( V_DATE , 'YYYY-MM-DD' ) , 'workcenters' : ( 
SELECT JSON_ARRAYAGG ( 
WC_OBJ FORMAT JSON 
) 
FROM JSON_WORKCENTERS ) FORMAT JSON , 
'dataSource' : 'MOTRAN (Live)' , 'generatedAt' : TO_CHAR ( 
CURRENT_TIMESTAMP , 'YYYY-MM-DD HH24:MI:SS' ) 
) ) 
FROM SYSIBM . SYSDUMMY1 ; 
END  ; 

GRANT ALTER , EXECUTE   
ON SPECIFIC FUNCTION RESTAPI.SFP_GET_HOURLY_DOWNTIME 
TO AMAPICS WITH GRANT OPTION ; 

GRANT EXECUTE   
ON SPECIFIC FUNCTION RESTAPI.SFP_GET_HOURLY_DOWNTIME 
TO PUBLIC ;