> On Feb 13, 2020, at 3:44 AM, Suraj Kharage <suraj.khar...@enterprisedb.com> 
> wrote:
> 
> Hi,
> 
> I have spent some time reviewing the patches and overall it looks good to me.
> 
> However, I have few cosmetic review comments for 0003 patch as below;
> 
> 1: 
> +++ b/src/backend/utils/hash/hashfn.c
> @@ -16,15 +16,14 @@
>   *    It is expected that every bit of a hash function's 32-bit result is
>   *    as random as every other; failure to ensure this is likely to lead
>   *    to poor performance of hash tables.  In most cases a hash
> - *    function should use hash_any() or its variant hash_uint32().
> + *    function should use hash_bytes() or its variant hash_bytes_uint32(),
> + *    or the wrappers hash_any() and hash_any_uint32 defined in hashfn.h.
> 
> Here, indicated function name should be hash_uint32.

+1

> 2: I can see renamed functions are declared twice in hashutils.c. I think 
> duplicate declarations after #endif can be removed,
> 
> +extern uint32 hash_bytes(const unsigned char *k, int keylen);
> +extern uint64 hash_bytes_extended(const unsigned char *k,
> +      int keylen, uint64 seed);
> +extern uint32 hash_bytes_uint32(uint32 k);
> +extern uint64 hash_bytes_uint32_extended(uint32 k, uint64 seed);
> +
> +#ifndef FRONTEND
> ..
> Wrapper functions
> ..
> +#endif
> +
> +extern uint32 hash_bytes(const unsigned char *k, int keylen);
> +extern uint64 hash_bytes_extended(const unsigned char *k,
> +      int keylen, uint64 seed);
> +extern uint32 hash_bytes_uint32(uint32 k);
> +extern uint64 hash_bytes_uint32_extended(uint32 k, uint64 seed);

+1

> 3: The first line of the commit message has one typo.
> defiend => defined.

+1

I have made these changes and rebased Robert’s patches but otherwise changed 
nothing.  Here they are:

Attachment: v2-0001-Move-bitmap_hash-and-bitmap_match-to-bitmapset.c.patch
Description: Binary data

Attachment: v2-0002-Put-all-the-prototypes-for-hashfn.c-into-the-same.patch
Description: Binary data

Attachment: v2-0003-Adapt-hashfn.c-and-hashutils.h-for-frontend-use.patch
Description: Binary data

Attachment: v2-0004-Move-src-backend-utils-hash-hashfn.c-to-src-commo.patch
Description: Binary data


—
Mark Dilger
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company



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