General information
Category:
Coding, syntax & commands
Title:
SELECT optimization
I am trying to optimize SELECT statement and using function SYS(3054,1) for checking level of optimization.
SELECT ssn FROM employ WHERE UPPER(ssn)="111111111"
returns 'partial' level of optimization, even I have index on UPPER(ssn). Why and what I'm doing wrong?
I would like to have 'full' optimization level.
Thanks in advance.
Jerry
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