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/*-------------------------------------------------------------------------
*
* vacuum.h
* header file for postgres vacuum cleaner
*
*
* Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: vacuum.h,v 1.34 2001/03/22 04:00:43 momjian Exp $
*
*-------------------------------------------------------------------------
*/
#ifndef VACUUM_H
#define VACUUM_H
#include "catalog/pg_attribute.h"
#include "catalog/pg_index.h"
#include "fmgr.h"
#include "nodes/pg_list.h"
#include "storage/itemptr.h"
typedef struct VAttListData
{
int val_dummy;
struct VAttListData *val_next;
} VAttListData;
typedef VAttListData *VAttList;
typedef struct VacPageData
{
BlockNumber blkno; /* BlockNumber of this Page */
Size free; /* FreeSpace on this Page */
uint16 offsets_used; /* Number of OffNums used by vacuum */
uint16 offsets_free; /* Number of OffNums free or to be free */
OffsetNumber offsets[1]; /* Array of its OffNums */
} VacPageData;
typedef VacPageData *VacPage;
typedef struct VacPageListData
{
int empty_end_pages;/* Number of "empty" end-pages */
int num_pages; /* Number of pages in pagedesc */
int num_allocated_pages; /* Number of allocated pages in
* pagedesc */
VacPage *pagedesc; /* Descriptions of pages */
} VacPageListData;
typedef VacPageListData *VacPageList;
typedef struct
{
Form_pg_attribute attr;
Datum best,
guess1,
guess2,
max,
min;
int best_len,
guess1_len,
guess2_len,
max_len,
min_len;
long best_cnt,
guess1_cnt,
guess1_hits,
guess2_hits,
null_cnt,
nonnull_cnt,
max_cnt,
min_cnt;
FmgrInfo f_cmpeq,
f_cmplt,
f_cmpgt;
Oid op_cmplt;
regproc outfunc;
Oid typelem;
bool initialized;
} VacAttrStats;
typedef struct VRelListData
{
Oid vrl_relid;
struct VRelListData *vrl_next;
} VRelListData;
typedef VRelListData *VRelList;
typedef struct VTupleLinkData
{
ItemPointerData new_tid;
ItemPointerData this_tid;
} VTupleLinkData;
typedef VTupleLinkData *VTupleLink;
typedef struct VTupleMoveData
{
ItemPointerData tid; /* tuple ID */
VacPage vacpage; /* where to move */
bool cleanVpd; /* clean vacpage before using */
} VTupleMoveData;
typedef VTupleMoveData *VTupleMove;
typedef struct VRelStats
{
Oid relid;
int num_tuples;
int num_pages;
Size min_tlen;
Size max_tlen;
bool hasindex;
int num_vtlinks;
VTupleLink vtlinks;
} VRelStats;
extern bool VacuumRunning;
extern void vc_abort(void);
extern void vacuum(char *vacrel, bool verbose, bool analyze, List *anal_cols);
extern void analyze_rel(Oid relid, List *anal_cols2, int MESSAGE_LEVEL);
#define ATTNVALS_SCALE 1000000000 /* XXX so it can act as a float4 */
#endif /* VACUUM_H */
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