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On machines with MAXALIGN = 8, the payload of a bytea is not maxaligned,
since it will start 4 bytes into a palloc'd value. On alignment-picky
hardware, this will cause failures in accesses to 8-byte-wide values
within the page. We already encountered this problem when we introduced
GIN index inspection functions, and fixed it in commit 84ad68d64
. Make
use of the same function for hash indexes.
A small difficulty is that up to now contrib/pageinspect has not shared
any functions at all across files. To support that, introduce a common
header file "pageinspect.h" for the module.
Also, move get_page_from_raw() out of ginfuncs.c, where it didn't
especially belong, and put it in rawpage.c which seems a more natural home.
Per buildfarm.
Discussion: https://postgr.es/m/17311.1486134714@sss.pgh.pa.us
22 lines
518 B
C
22 lines
518 B
C
/*-------------------------------------------------------------------------
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*
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* pageinspect.h
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* Common functions for pageinspect.
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*
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* Copyright (c) 2017, PostgreSQL Global Development Group
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*
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* IDENTIFICATION
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* contrib/pageinspect/pageinspect.h
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef _PAGEINSPECT_H_
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#define _PAGEINSPECT_H_
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#include "storage/bufpage.h"
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/* in rawpage.c */
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extern Page get_page_from_raw(bytea *raw_page);
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#endif /* _PAGEINSPECT_H_ */
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