On 07/12/2018 10:08 AM, samuel.coulee wrote:

In the PG source code function "write_relcache_init_file()", I found that
the whole 'Relation' structs were directly written into the file
'pg_internal.init'. This brings some binary differences of that file,  if we
run pg_initdb multiple times, because the struct 'Relation' contains some
pointer fields.

And my question is : Could we clear the pointer values in 'Relation' before
calling write_item(...)?

No benefit regarding function or performance, just for binary

Binary compatibility with what? Can you describe a scenario where this actually matters?


Tomas Vondra                  http://www.2ndQuadrant.com
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services

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