On 3/28/19 3:33 AM, Steve Atkins wrote:
On Mar 28, 2019, at 8:29 AM, Ron <ronljohnsonjr@xxxxxxxxx> wrote:
On 3/28/19 3:23 AM, Sameer Kumar wrote:
[snip]
You can write a query with upper function:
select * from emp where upper(ename)=upper('aaa');
That's a guaranteed table scan.
Unless you have an index on upper(ename).
Are you sure? I thought the lpart had to be immutable for the query
optimizer to decide to use an index (and upper(ename) is mutable).
--
Angular momentum makes the world go 'round.
