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📁 ..
📄 amapi.h(6.3 KB)
📄 amvalidate.h(1.19 KB)
📄 attnum.h(1.52 KB)
📄 brin.h(948 B)
📄 brin_internal.h(3.3 KB)
📄 brin_page.h(2.68 KB)
📄 brin_pageops.h(1.28 KB)
📄 brin_revmap.h(1.23 KB)
📄 brin_tuple.h(3.05 KB)
📄 brin_xlog.h(3.28 KB)
📄 clog.h(1.54 KB)
📄 commit_ts.h(2.09 KB)
📄 genam.h(7.31 KB)
📄 generic_xlog.h(1.42 KB)
📄 gin.h(2.3 KB)
📄 gin_private.h(33.12 KB)
📄 gist.h(6.51 KB)
📄 gist_private.h(19.82 KB)
📄 gistscan.h(729 B)
📄 hash.h(13.54 KB)
📄 heapam.h(7.76 KB)
📄 heapam_xlog.h(12.61 KB)
📄 hio.h(1.26 KB)
📄 htup.h(3.16 KB)
📄 htup_details.h(28.31 KB)
📄 itup.h(4.36 KB)
📄 multixact.h(5.13 KB)
📄 nbtree.h(30.22 KB)
📄 parallel.h(2.28 KB)
📄 printtup.h(1.03 KB)
📄 reloptions.h(8.88 KB)
📄 relscan.h(5.63 KB)
📄 rewriteheap.h(1.79 KB)
📄 rmgr.h(609 B)
📄 rmgrlist.h(2.97 KB)
📄 sdir.h(1.43 KB)
📄 skey.h(6.26 KB)
📄 slru.h(5.49 KB)
📄 spgist.h(7.04 KB)
📄 spgist_private.h(21.82 KB)
📄 stratnum.h(2.67 KB)
📄 subtrans.h(973 B)
📄 sysattr.h(890 B)
📄 timeline.h(1.59 KB)
📄 transam.h(6.29 KB)
📄 tsmapi.h(2.55 KB)
📄 tupconvert.h(1.4 KB)
📄 tupdesc.h(4.36 KB)
📄 tupmacs.h(7.16 KB)
📄 tuptoaster.h(7.18 KB)
📄 twophase.h(1.82 KB)
📄 twophase_rmgr.h(1.24 KB)
📄 valid.h(1.4 KB)
📄 visibilitymap.h(1.77 KB)
📄 xact.h(12.29 KB)
📄 xlog.h(10.91 KB)
📄 xlog_fn.h(1.41 KB)
📄 xlog_internal.h(10.29 KB)
📄 xlogdefs.h(3.11 KB)
📄 xloginsert.h(2.28 KB)
📄 xlogreader.h(7.11 KB)
📄 xlogrecord.h(7.76 KB)
📄 xlogutils.h(1.76 KB)

Editing: brin_tuple.h

/*
 * brin_tuple.h
 *		Declarations for dealing with BRIN-specific tuples.
 *
 * Portions Copyright (c) 1996-2016, PostgreSQL Global Development Group
 * Portions Copyright (c) 1994, Regents of the University of California
 *
 * IDENTIFICATION
 *	  src/include/access/brin_tuple.h
 */
#ifndef BRIN_TUPLE_H
#define BRIN_TUPLE_H

#include "access/brin_internal.h"
#include "access/tupdesc.h"

/*
 * A BRIN index stores one index tuple per page range.  Each index tuple
 * has one BrinValues struct for each indexed column; in turn, each BrinValues
 * has (besides the null flags) an array of Datum whose size is determined by
 * the opclass.
 */
typedef struct BrinValues
{
	AttrNumber	bv_attno;		/* index attribute number */
	bool		bv_hasnulls;	/* are there any nulls in the page range? */
	bool		bv_allnulls;	/* are all values nulls in the page range? */
	Datum	   *bv_values;		/* current accumulated values */
} BrinValues;

/*
 * This struct is used to represent an in-memory index tuple.  The values can
 * only be meaningfully decoded with an appropriate BrinDesc.
 */
typedef struct BrinMemTuple
{
	bool		bt_placeholder; /* this is a placeholder tuple */
	BlockNumber bt_blkno;		/* heap blkno that the tuple is for */
	MemoryContext bt_context;	/* memcxt holding the bt_columns values */
	BrinValues	bt_columns[FLEXIBLE_ARRAY_MEMBER];
} BrinMemTuple;

/*
 * An on-disk BRIN tuple.  This is possibly followed by a nulls bitmask, with
 * room for 2 null bits (two bits for each indexed column); an opclass-defined
 * number of Datum values for each column follow.
 */
typedef struct BrinTuple
{
	/* heap block number that the tuple is for */
	BlockNumber bt_blkno;

/* ---------------
	 * bt_info is laid out in the following fashion:
	 *
	 * 7th (high) bit: has nulls
	 * 6th bit: is placeholder tuple
	 * 5th bit: unused
	 * 4-0 bit: offset of data
	 * ---------------
	 */
	uint8		bt_info;
} BrinTuple;

#define SizeOfBrinTuple (offsetof(BrinTuple, bt_info) + sizeof(uint8))

/*
 * bt_info manipulation macros
 */
#define BRIN_OFFSET_MASK		0x1F
/* bit 0x20 is not used at present */
#define BRIN_PLACEHOLDER_MASK	0x40
#define BRIN_NULLS_MASK			0x80

#define BrinTupleDataOffset(tup)	((Size) (((BrinTuple *) (tup))->bt_info & BRIN_OFFSET_MASK))
#define BrinTupleHasNulls(tup)	(((((BrinTuple *) (tup))->bt_info & BRIN_NULLS_MASK)) != 0)
#define BrinTupleIsPlaceholder(tup) (((((BrinTuple *) (tup))->bt_info & BRIN_PLACEHOLDER_MASK)) != 0)

extern BrinTuple *brin_form_tuple(BrinDesc *brdesc, BlockNumber blkno,
				BrinMemTuple *tuple, Size *size);
extern BrinTuple *brin_form_placeholder_tuple(BrinDesc *brdesc,
							BlockNumber blkno, Size *size);
extern void brin_free_tuple(BrinTuple *tuple);
extern BrinTuple *brin_copy_tuple(BrinTuple *tuple, Size len);
extern bool brin_tuples_equal(const BrinTuple *a, Size alen,
				  const BrinTuple *b, Size blen);

extern BrinMemTuple *brin_new_memtuple(BrinDesc *brdesc);
extern void brin_memtuple_initialize(BrinMemTuple *dtuple,
						 BrinDesc *brdesc);
extern BrinMemTuple *brin_deform_tuple(BrinDesc *brdesc,
				  BrinTuple *tuple);

#endif   /* BRIN_TUPLE_H */

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Editing: brin_tuple.h

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