contrib/btree_gist/btree_utils_var.h

   1 /*
   2  * $PostgreSQL:$
   3  */
   4 #ifndef __BTREE_UTILS_VAR_H__
   5 #define __BTREE_UTILS_VAR_H__
   6
   7 #include "btree_gist.h"
   8
   9 #include "mb/pg_wchar.h"
  10
  11 /* Variable length key */
  12 typedef bytea GBT_VARKEY;
  13
  14 /* Better readable key */
  15 typedef struct
  16 {
  17         bytea      *lower,
  18                            *upper;
  19 }       GBT_VARKEY_R;
  20
  21 /* used for key sorting */
  22 typedef struct
  23 {
  24         int                     i;
  25         GBT_VARKEY *t;
  26 }       Vsrt;
  27
  28 /*
  29   type description
  30 */
  31
  32
  33 typedef struct
  34 {
  35
  36         /* Attribs */
  37
  38         enum gbtree_type t;                     /* data type */
  39         int32           eml;                    /* cached pg_database_encoding_max_length (0:
  40                                                                  * undefined) */
  41         bool            trnc;                   /* truncate (=compress) key */
  42
  43         /* Methods */
  44
  45         bool            (*f_gt) (const void *, const void *);   /* greater then */
  46         bool            (*f_ge) (const void *, const void *);   /* greater equal */
  47         bool            (*f_eq) (const void *, const void *);   /* equal */
  48         bool            (*f_le) (const void *, const void *);   /* less equal */
  49         bool            (*f_lt) (const void *, const void *);   /* less then */
  50         int32           (*f_cmp) (const bytea *, const bytea *);                /* node compare */
  51         GBT_VARKEY *(*f_l2n) (GBT_VARKEY *);            /* convert leaf to node */
  52 }       gbtree_vinfo;
  53
  54
  55
  56 extern GBT_VARKEY_R gbt_var_key_readable(const GBT_VARKEY * k);
  57
  58 extern GBT_VARKEY *gbt_var_key_copy(const GBT_VARKEY_R * u, bool force_node);
  59
  60 extern GISTENTRY *gbt_var_compress(GISTENTRY *entry, const gbtree_vinfo * tinfo);
  61
  62 extern GBT_VARKEY *gbt_var_union(const GistEntryVector *entryvec, int32 *size,
  63                           const gbtree_vinfo * tinfo);
  64
  65 extern bool gbt_var_same(bool *result, const Datum d1, const Datum d2,
  66                          const gbtree_vinfo * tinfo);
  67
  68 extern float *gbt_var_penalty(float *res, const GISTENTRY *o, const GISTENTRY *n,
  69                                 const gbtree_vinfo * tinfo);
  70
  71 extern bool gbt_var_consistent(GBT_VARKEY_R * key, const void *query,
  72                                    const StrategyNumber *strategy, bool is_leaf,
  73                                    const gbtree_vinfo * tinfo);
  74
  75 extern GIST_SPLITVEC *gbt_var_picksplit(const GistEntryVector *entryvec, GIST_SPLITVEC *v,
  76                                   const gbtree_vinfo * tinfo);
  77 extern void gbt_var_bin_union(Datum *u, GBT_VARKEY * e,
  78                                   const gbtree_vinfo * tinfo);
  79
  80 #endif