RE: Rebuild Indexes


select seq.nextval into :local_var from dual;
insert into tabx values (:local_var, ...);

compared to

insert into tabx(seq.nextval, ...)
returning id_col into :local_var;

The former has a non-zero probability of the
inserts arriving out of order, and therefore
wrecking the sequential input.

Regard
Jonathan Lewis



ian@xxxxxxxxxxxxxxxxx wrote:
> I'm curious, how does coding of an application effect index block splits.  
> Does Oracle know because the index is based on a monotonic key that the 
> splits should be 100/0.  I wouldn't call that application coding.  Do the 
> 100/0 splits occur unless numbers are lost  due to the sequence being kicked 
> out of cache or something else causes values to be skipped?
> 
> Ian MacGregor
> Stanford Linear Accelerator Center
> ian@xxxxxxxxxxxxxxxxx
> 
> 


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