Re: Old-style OR indexscan slated for destruction

[Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>]

Christopher Kings-Lynne <chriskl(at)familyhealth(dot)com(dot)au> writes:
> I am about to rip out the code that supports multiple indexscans for OR
> conditions inside a single IndexScan plan node.  As best I can tell,
> the new-style bitmap-OR code is as fast or faster than the old way
> even in fully cached test cases (ie, with no allowance for improved
> efficiency of disk access).  So there's no percentage in maintaining
> support for the old way, and getting rid of it will allow simplification
> of code and data structures in the planner.

> For all index types?  Even lossy ones?

Can't see that a lossy index would make any difference ...

			regards, tom lane