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00001 /* 00002 * contrib/btree_gist/btree_utils_var.h 00003 */ 00004 #ifndef __BTREE_UTILS_VAR_H__ 00005 #define __BTREE_UTILS_VAR_H__ 00006 00007 #include "btree_gist.h" 00008 00009 #include "access/gist.h" 00010 #include "mb/pg_wchar.h" 00011 00012 /* Variable length key */ 00013 typedef bytea GBT_VARKEY; 00014 00015 /* Better readable key */ 00016 typedef struct 00017 { 00018 bytea *lower, 00019 *upper; 00020 } GBT_VARKEY_R; 00021 00022 /* 00023 * type description 00024 */ 00025 typedef struct 00026 { 00027 00028 /* Attribs */ 00029 00030 enum gbtree_type t; /* data type */ 00031 int32 eml; /* cached pg_database_encoding_max_length (0: 00032 * undefined) */ 00033 bool trnc; /* truncate (=compress) key */ 00034 00035 /* Methods */ 00036 00037 bool (*f_gt) (const void *, const void *, Oid); /* greater than */ 00038 bool (*f_ge) (const void *, const void *, Oid); /* greater equal */ 00039 bool (*f_eq) (const void *, const void *, Oid); /* equal */ 00040 bool (*f_le) (const void *, const void *, Oid); /* less equal */ 00041 bool (*f_lt) (const void *, const void *, Oid); /* less than */ 00042 int32 (*f_cmp) (const void *, const void *, Oid); /* compare */ 00043 GBT_VARKEY *(*f_l2n) (GBT_VARKEY *); /* convert leaf to node */ 00044 } gbtree_vinfo; 00045 00046 00047 00048 extern GBT_VARKEY_R gbt_var_key_readable(const GBT_VARKEY *k); 00049 00050 extern GBT_VARKEY *gbt_var_key_copy(const GBT_VARKEY_R *u, bool force_node); 00051 00052 extern GISTENTRY *gbt_var_compress(GISTENTRY *entry, const gbtree_vinfo *tinfo); 00053 00054 extern GBT_VARKEY *gbt_var_union(const GistEntryVector *entryvec, int32 *size, 00055 Oid collation, const gbtree_vinfo *tinfo); 00056 00057 extern bool gbt_var_same(Datum d1, Datum d2, Oid collation, 00058 const gbtree_vinfo *tinfo); 00059 00060 extern float *gbt_var_penalty(float *res, const GISTENTRY *o, const GISTENTRY *n, 00061 Oid collation, const gbtree_vinfo *tinfo); 00062 00063 extern bool gbt_var_consistent(GBT_VARKEY_R *key, const void *query, 00064 StrategyNumber strategy, Oid collation, bool is_leaf, 00065 const gbtree_vinfo *tinfo); 00066 00067 extern GIST_SPLITVEC *gbt_var_picksplit(const GistEntryVector *entryvec, GIST_SPLITVEC *v, 00068 Oid collation, const gbtree_vinfo *tinfo); 00069 00070 extern void gbt_var_bin_union(Datum *u, GBT_VARKEY *e, Oid collation, 00071 const gbtree_vinfo *tinfo); 00072 00073 #endif
1.7.1