How can I create an empty row on a #TempTable based on an input parameter

Question

So if my Line of Business is 'MC' or 'MG', I have to go over to Oracle and get its data accordingly. Then, when I create my final report result set, I think I'll want to UNION in that result set if my Parameter is 'MC' or 'MG'. I don't think I can UNION
based on the value of the Parameter. So my thought process was to create an empty row on my #TempTable so when I UNION and my parameter is NOT 'MC' or 'MG' then it will have nothing to UNION in. My struggle is how do I create an empty row in my #TempTable
if my parameter is NOT 'MC' or 'MG'
If I am wwwaaayyy off here, please tell me so.
This is my #TempTable Creation SQL...
IF EXISTS
(SELECT 1
FROM [#TempTable_LineOfBusiness_Parameter]
WHERE [#TempTable_LineOfBusiness_Parameter].[RESULT] IN ('MC','MG'))
BEGIN
SELECT *
INTO [#TempTable_Market_Prominence_Member_Data]
FROM OPENQUERY
(RPDMHF,
'SELECT HCFA_NAME_ORG.NAME_ID,
HCFA_NAME_ORG.MEMBER_ID,
HCFA_NAME_ORG.HIC_NUMBER,
MEMBER.NAME_FIRST,
MEMBER.NAME_LAST,
HCFA_DATE.START_DATE,
HCFA_DATE.END_DATE,
HCFA_NAME_ORG.COUNTY_CODE,
HCFA_NAME_ORG.PART_A_PAYMENT,
HCFA_NAME_ORG.PART_B_PAYMENT,
HCFA_NAME_ORG.STATUS,
HCFA_NAME_ORG.ORG_ID,
HCFA_NAME_ORG.PLAN,
HCFA_NAME_ORG.ENROLL_DATE,
HCFA_NAME_ORG.PBP_ID,
HCFA_DATE.VALUE
FROM SC_BASE.HCFA_DATE
LEFT JOIN SC_BASE.HCFA_NAME_ORG
ON HCFA_NAME_ORG.NAME_ID = HCFA_DATE.NAME_ID
LEFT JOIN AMIOWN.MEMBER
ON TRIM(MEMBER.MEMBER_NBR) = TRIM(HCFA_NAME_ORG.MEMBER_ID)
WHERE HCFA_DATE.INDICATOR = ''plan''
AND HCFA_DATE.START_DATE >= ''2015-01-01''
END
If I add an ELSE, it always comes back and tells me the #TempTable_Market_Prominence_Member_Data already exists. As if it's creating it regardless of the Top IF.
Thanks for your review and am hopeful for a reply.

Answer 1

Hi ITBobbyP,
The error came back from your ELSE Statement most probably caused by the reason mentioned in Hoffmann's post.
Regarding your requirement, I would suggest you CREATE the [#TempTable_Market_Prominence_Member_Data] explicitly.
CREATE TABLE [#TempTable_Market_Prominence_Member_Data]
NAME_ID INT,
MEMBER_ID INT,
HIC_NUMBER VARCHAR(99),
NAME_FIRST VARCHAR(99),
NAME_LAST VARCHAR(99),
START_DATE DATE,
END_DATE DATE,
COUNTY_CODE VARCHAR(99),
PART_A_PAYMENT MONEY,
PART_B_PAYMENT MONEY,
STATUS VARCHAR(99),
ORG_ID INT,
PALN VARCHAR(99),
ENROLL_DATE VARCHAR(99),
PBP_ID INT,
VALUE INT
IF EXISTS
(SELECT 1
FROM [#TempTable_LineOfBusiness_Parameter]
WHERE [#TempTable_LineOfBusiness_Parameter].[RESULT] IN ('MC','MG'))
BEGIN
INSERT INTO [#TempTable_Market_Prominence_Member_Data]
SELECT *
FROM OPENQUERY
(RPDMHF,
'SELECT HCFA_NAME_ORG.NAME_ID,
HCFA_NAME_ORG.MEMBER_ID,
HCFA_NAME_ORG.HIC_NUMBER,
MEMBER.NAME_FIRST,
MEMBER.NAME_LAST,
HCFA_DATE.START_DATE,
HCFA_DATE.END_DATE,
HCFA_NAME_ORG.COUNTY_CODE,
HCFA_NAME_ORG.PART_A_PAYMENT,
HCFA_NAME_ORG.PART_B_PAYMENT,
HCFA_NAME_ORG.STATUS,
HCFA_NAME_ORG.ORG_ID,
HCFA_NAME_ORG.PLAN,
HCFA_NAME_ORG.ENROLL_DATE,
HCFA_NAME_ORG.PBP_ID,
HCFA_DATE.VALUE
FROM SC_BASE.HCFA_DATE
LEFT JOIN SC_BASE.HCFA_NAME_ORG
ON HCFA_NAME_ORG.NAME_ID = HCFA_DATE.NAME_ID
LEFT JOIN AMIOWN.MEMBER
ON TRIM(MEMBER.MEMBER_NBR) = TRIM(HCFA_NAME_ORG.MEMBER_ID)
WHERE HCFA_DATE.INDICATOR = ''plan''
AND HCFA_DATE.START_DATE >= ''2015-01-01''
END
Explicitly creating the temp table will offer below benefit in this case.
The ELSE statement is no longer needed, if the no rows get inserted into that table, it has nothing to union an empty table.
With the column datatype defined, you can avoid such conversion error
SELECT NULL AS COL1,NULL AS COL2 INTO #T
SELECT COL1,COL2 FROM #T
UNION
SELECT 1,'ABC'--Conversion failed when converting the varchar value 'ABC' to data type int.
If you have any question, feel free to let me know.
Eric Zhang
TechNet Community Support