Re: [HACKERS] JIT compiling expressions/deform + inlining prototypev2.0

On 04.09.2017 23:52, Andres Freund wrote:
>
> Yea, I've changed that already, although it's currently added earlier,
> because the alignment is needed before, to access the column correctly.
> I've also made number of efficiency improvements, primarily to access
> columns with an absolute offset if all preceding ones are fixed width
> not null columns - that is quite noticeable performancewise.

Unfortunately, in most of real table columns are nullable.
I wonder if we can perform some optimization in this case (assuming that 
in typical cases column either contains mostly non-null values, either 
mostly null values).

-- 
Konstantin Knizhnik
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