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Binary difference in pg_internal.init after running pg_initdbmultiple times - Mailing list pgsql-hackers

From samuel.coulee
Subject Binary difference in pg_internal.init after running pg_initdbmultiple times
Date
Msg-id 1531382924194-0.post@n3.nabble.com
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Responses Re: Binary difference in pg_internal.init after running pg_initdbmultiple times  (Tomas Vondra <tomas.vondra@2ndquadrant.com>)
Re: Binary difference in pg_internal.init after running pg_initdb multiple times  (Tom Lane <tgl@sss.pgh.pa.us>)
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Hi,

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
compatibility... 
Thanks for reading. 




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