btree_utils_var.h

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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"
 
/* 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