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/*
* contrib/btree_gist/btree_utils_var.h
*/
#ifndef __BTREE_UTILS_VAR_H__
#define __BTREE_UTILS_VAR_H__
#include "access/gist.h"
#include "btree_gist.h"
#include "mb/pg_wchar.h"
/* Variable length key */
typedef bytea GBT_VARKEY;
/* Better readable key */
typedef struct
{
bytea *lower,
*upper;
} GBT_VARKEY_R;
/*
* type description
*/
typedef struct
{
/* Attribs */
enum gbtree_type t; /* data type */
int32 eml; /* cached pg_database_encoding_max_length (0:
* undefined) */
bool trnc; /* truncate (=compress) key */
/* Methods */
bool (*f_gt) (const void *, const void *, Oid, FmgrInfo *); /* greater than */
bool (*f_ge) (const void *, const void *, Oid, FmgrInfo *); /* greater equal */
bool (*f_eq) (const void *, const void *, Oid, FmgrInfo *); /* equal */
bool (*f_le) (const void *, const void *, Oid, FmgrInfo *); /* less equal */
bool (*f_lt) (const void *, const void *, Oid, FmgrInfo *); /* less than */
int32 (*f_cmp) (const void *, const void *, Oid, FmgrInfo *); /* compare */
GBT_VARKEY *(*f_l2n) (GBT_VARKEY *, FmgrInfo *flinfo); /* convert leaf to node */
} gbtree_vinfo;
extern GBT_VARKEY_R gbt_var_key_readable(const GBT_VARKEY *k);
extern GBT_VARKEY *gbt_var_key_copy(const GBT_VARKEY_R *u);
extern GISTENTRY *gbt_var_compress(GISTENTRY *entry, const gbtree_vinfo *tinfo);
extern GBT_VARKEY *gbt_var_union(const GistEntryVector *entryvec, int32 *size,
Oid collation, const gbtree_vinfo *tinfo, FmgrInfo *flinfo);
extern bool gbt_var_same(Datum d1, Datum d2, Oid collation,
const gbtree_vinfo *tinfo, FmgrInfo *flinfo);
extern float *gbt_var_penalty(float *res, const GISTENTRY *o, const GISTENTRY *n,
Oid collation, const gbtree_vinfo *tinfo, FmgrInfo *flinfo);
extern bool gbt_var_consistent(GBT_VARKEY_R *key, const void *query,
StrategyNumber strategy, Oid collation, bool is_leaf,
const gbtree_vinfo *tinfo, FmgrInfo *flinfo);
extern GIST_SPLITVEC *gbt_var_picksplit(const GistEntryVector *entryvec, GIST_SPLITVEC *v,
Oid collation, const gbtree_vinfo *tinfo, FmgrInfo *flinfo);
extern void gbt_var_bin_union(Datum *u, GBT_VARKEY *e, Oid collation,
const gbtree_vinfo *tinfo, FmgrInfo *flinfo);
#endif
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