Using two lookup functions for one DIM KEY - function

Question

I have created three lookup functions for three scenarios that can occur within the data. Each of these functions should return a account_dim_key, the first scenario takes the sr account ID and call data-time from a call table and returns a dim key if the call date-time is between effective start and end dates, the second scenario uses call date(no time) and the third scnario take just uses account id (no date). If the first lookup function returns a -1 then I want to use the second lookup function, and if that returns a -1 then I was to use the third lookup function. I have been trying to use them in a case statement but in all the scenarios I have tried it always returns the dim key from the second lookup function (in the THEN part of my case statement). Is it not possible to use three functions in a case statement this way or am I going about it the complete wrong way.
lookup 1
CREATE OR REPLACE FUNCTION LOOKUP_D_ACCT(p_acct_id IN VARCHAR2, p_date IN DATE)
RETURN NUMBER
PARALLEL_ENABLE
IS
v_dim_id NUMBER;
BEGIN
SELECT ACCOUNT_DIM_KEY
INTO v_dim_id
FROM
schema.D_ACCOUNT ac
WHERE p_acct_id = ac.ID
AND (p_date BETWEEN ac.EFFECTIVE_START_DT AND ac.EFFECTIVE_END_DT)
;
RETURN v_dim_id;
EXCEPTION
WHEN OTHERS
THEN
RETURN -1;
END LOOKUP_D_ACCT;
/
Lookup 2
CREATE OR REPLACE FUNCTION LOOKUP_D_ACCT_TRUNC_DT (p_acct_id IN VARCHAR2, p_date IN DATE)
RETURN NUMBER
PARALLEL_ENABLE
IS
v_dim_id NUMBER;
BEGIN
SELECT MAX(ACCOUNT_DIM_KEY)
INTO v_dim_id
FROM
schema.D_ACCOUNT ac
WHERE p_acct_id = ac.ID
AND p_date >= TRUNC(ac.EFFECTIVE_START_DT) AND p_date <= TRUNC(ac.EFFECTIVE_END_DT)
;
RETURN v_dim_id;
EXCEPTION
WHEN OTHERS
THEN
RETURN -1;
END;
/
Lookup 3
CREATE OR REPLACE FUNCTION LOOKUP_D_ACCT_NO_DT (p_acct_id IN VARCHAR2)
--LOOKUP FUNCTION TO PASS THROUGH FIELD_ALIGN_DIM_ID WITH DATE CRITERIA
--new one for practice load
--dated 8/31
RETURN NUMBER
PARALLEL_ENABLE
IS
v_dim_id NUMBER;
BEGIN
SELECT ACCOUNT_DIM_KEY
INTO v_dim_id
FROM
schema.D_ACCOUNT ac
WHERE p_acct_id = ac.ID
;
RETURN v_dim_id;
EXCEPTION
WHEN OTHERS
THEN
RETURN -1;
END;
/
The select of my procedure looks like this:
SELECT cl.id,
cl.account_vod__c,
cl.call_date_vod__c,
cl.call_datetime_vod__c,
(CASE
WHEN NVL (
LOOKUP_D_ACCT(cl.ACCOUNT_VOD__C,
CL.CALL_DATETIME_VOD__C),
-1) = -1
--lookup 1
THEN
NVL (
LOOKUP_ACCT_TRUNC_DT (cl.ACCOUNT_VOD__C,
CL.CALL_DATE_VOD__C),
-1)
--lookup 2
WHEN NVL (
LOOKUP_ACCT_TRUNC_DT (cl.ACCOUNT_VOD__C,
CL.CALL_DATE_VOD__C),
-1) = -1
THEN
NVL (LOOKUP_D_ACCT_NO_DT (cl.ACCOUNT_VOD__C), -1)
--lookup 3
ELSE -3
END)
AS ACCOUNT_DIM_KEY,
LOOKUP_D_ACCT_VEEVA (cl.ACCOUNT_VOD__C, CL.CALL_DATETIME_VOD__C)
AS DTIME_DIM_KEY,
--lookup 1
LOOKUP_ACCOUNT_DIM_TEST (cl.ACCOUNT_VOD__C, CL.CALL_DATE_VOD__C)
AS DT_DIM_KEY,
--lookup 2
LOOKUP_D_ACCT_VEEVA_NO_DT (cl.ACCOUNT_VOD__C) AS NODT_DIM_KEY
--lookup 3
FROM schema.CALLTABLE CL
WHERE CL.ID IN ('a043600000Bija3AAB')
I would expect the 'ACCOUNT_DIM_KEY' field to always be populated with the functions from lookup 1, 2, or 3
enter image description here
Any assistance would be greatly appreciated!

Answer 1

if you want to pass all the chain of your conditions, then you shouldn't use case statement, but in series check each condition:
if (NVL (LOOKUP_D_ACCT(cl.ACCOUNT_VOD__C, CL.CALL_DATETIME_VOD__C), -1) = -1) then
if (NVL ( LOOKUP_ACCT_TRUNC_DT (cl.ACCOUNT_VOD__C, CL.CALL_DATE_VOD__C), -1) = -1 ) then
if (NVL (LOOKUP_D_ACCT_NO_DT (cl.ACCOUNT_VOD__C), -1) = -1) then
-- if third func returned -1
else
-- action if third case
end if;
else
--action if second case
end if;
else
--action if first case
end if;
UPD
Sure, if it's a SQL not a PL/SQL, than you should use nested case, as has been said:
SELECT
(CASE
WHEN NVL (
LOOKUP_D_ACCT(cl.ACCOUNT_VOD__C,
CL.CALL_DATETIME_VOD__C),
-1) = -1
--lookup 1
THEN
CASE
WHEN
NVL (
LOOKUP_ACCT_TRUNC_DT (cl.ACCOUNT_VOD__C,
CL.CALL_DATE_VOD__C),
-1)= -1
THEN
NVL (LOOKUP_D_ACCT_NO_DT (cl.ACCOUNT_VOD__C), -1)
ELSE -3
END
WHEN NVL (
LOOKUP_ACCT_TRUNC_DT (cl.ACCOUNT_VOD__C,
CL.CALL_DATE_VOD__C),
-1) = -1
THEN
NVL (LOOKUP_D_ACCT_NO_DT (cl.ACCOUNT_VOD__C), -1)
--lookup 3
ELSE -3
END)
AS ACCOUNT_DIM_KEY,
LOOKUP_D_ACCT_VEEVA (cl.ACCOUNT_VOD__C, CL.CALL_DATETIME_VOD__C)
AS DTIME_DIM_KEY,
--lookup 1
LOOKUP_ACCOUNT_DIM_TEST (cl.ACCOUNT_VOD__C, CL.CALL_DATE_VOD__C)
AS DT_DIM_KEY,
--lookup 2
LOOKUP_D_ACCT_VEEVA_NO_DT (cl.ACCOUNT_VOD__C) AS NODT_DIM_KEY
--lookup 3
FROM schema.CALLTABLE CL
WHERE CL.ID IN ('a043600000Bija3AAB')