Re: [HACKERS] [PATCH] pageinspect function to decode infomasks

On 2019-Sep-13, Michael Paquier wrote:

> Attached is a patch to fix your suggestions.  This also removes the
> use of HEAP_XMAX_IS_LOCKED_ONLY which did not make completely sense
> either as a "raw" flag.  While on it, the order of the flags can be
> improved to match more the order of htup_details.h

A thought I had as I fell asleep last night is to include the derivate
flags in a separate output column altogether.  So
heap_tuple_infomask_flags() could be made to return two columns, one
with the straight one-flag-per-bit, and another one with the compound
flags.  That way we always have the raw ones available, and we avoid any
confusion about strange cases such as LOCK_UPGRADED and IS_LOCKED_ONLY.

-- 
Álvaro Herrera                https://www.2ndQuadrant.com/
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