SET Analysis with variables

[h2k18]

Hi,

I have created the following variable to be utilized in the set analysis calculation:

vCurrQTR = 2018Q4 (User selected)

Variable Name: vTestQTR

 =if(right(vCurrQTR,2) = 'Q4',
chr(39)&left(vCurrQTR,4)&''&'Q1'&chr(39)&chr(44)&
chr(39)&left(vCurrQTR,4)&''&'Q2'&chr(39)&chr(44)&
chr(39)&left(vCurrQTR,4)&''&'Q3'&chr(39)&chr(44)&
chr(39)&left(vCurrQTR,4)&''&'Q4')&chr(39)

If we evaluate the above variable (=vTestQTR) in Text & image object it will yield the following result: '2018Q1','2018Q2','2018Q3','2018Q4'

Currently:
sum({<PERIOD_TYPE = {'Q'},RETURN_TYPE = {'S'},PERIOD = {'2018Q1','2018Q2','2018Q3','2018Q4'}>}Return) gives the correct result.

Now using variable would like to replace the above highlighted condition and get the same result. Unfortunately the variable is not working as expected inside the set analysis expression. Can you help with the correct syntax?
sum({<PERIOD_TYPE = {'Q'},RETURN_TYPE = {'S'},PERIOD = {'variable'}>}Return)

Sample file attached.

Thanks.

[h2k18]

Hi,

I have created the following variable to be utilized in the set analysis calculation:

vCurrQTR = 2018Q4 (User selected)

Variable Name: vTestQTR

 =if(right(vCurrQTR,2) = 'Q4',
chr(39)&left(vCurrQTR,4)&''&'Q1'&chr(39)&chr(44)&
chr(39)&left(vCurrQTR,4)&''&'Q2'&chr(39)&chr(44)&
chr(39)&left(vCurrQTR,4)&''&'Q3'&chr(39)&chr(44)&
chr(39)&left(vCurrQTR,4)&''&'Q4')&chr(39)

If we evaluate the above variable (=vTestQTR) in Text & image object it will yield the following result: '2018Q1','2018Q2','2018Q3','2018Q4'

Currently:
sum({<PERIOD_TYPE = {'Q'},RETURN_TYPE = {'S'},PERIOD = {'2018Q1','2018Q2','2018Q3','2018Q4'}>}Return) gives the correct result.

Now using variable would like to replace the above highlighted condition and get the same result. Unfortunately the variable is not working as expected inside the set analysis expression. Can you help with the correct syntax?
sum({<PERIOD_TYPE = {'Q'},RETURN_TYPE = {'S'},PERIOD = {'variable'}>}Return)

Sample file attached.

Thanks.