Re: Combining hash values - Mailing list pgsql-hackers

From Greg Stark
Subject Re: Combining hash values
Date
Msg-id CAM-w4HMVyYZ6T6t-S_gXirOt6x2p4pB9gWHNy9WqLz2vR683Pg@mail.gmail.com
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In response to Re: Combining hash values  (Thomas Munro <thomas.munro@enterprisedb.com>)
Responses Re: Combining hash values  (Dean Rasheed <dean.a.rasheed@gmail.com>)
Re: Combining hash values  (Tom Lane <tgl@sss.pgh.pa.us>)
List pgsql-hackers
<p dir="ltr">Surely combining multiple hashes is the same problem as hashing a block of memory? Shouldn't we just use
thesame algorithm as hash_any()?<p dir="ltr">I was originally going to suggest using a crc  to combine but iirc we
changedhash_any() a while back and decided against using crc. I don't know if that was wise but wouldn't want to
suggestrelitigating that. 

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