granicus.if.org Git - postgresql/blob - contrib/btree_gist/btree_text.c

   1 /*
   2  * contrib/btree_gist/btree_text.c
   3  */
   4 #include "btree_gist.h"
   5 #include "btree_utils_var.h"
   6 #include "catalog/pg_collation.h"
   7 #include "utils/builtins.h"
   8
   9 /*
  10 ** Text ops
  11 */
  12 PG_FUNCTION_INFO_V1(gbt_text_compress);
  13 PG_FUNCTION_INFO_V1(gbt_bpchar_compress);
  14 PG_FUNCTION_INFO_V1(gbt_text_union);
  15 PG_FUNCTION_INFO_V1(gbt_text_picksplit);
  16 PG_FUNCTION_INFO_V1(gbt_text_consistent);
  17 PG_FUNCTION_INFO_V1(gbt_bpchar_consistent);
  18 PG_FUNCTION_INFO_V1(gbt_text_penalty);
  19 PG_FUNCTION_INFO_V1(gbt_text_same);
  20
  21 Datum           gbt_text_compress(PG_FUNCTION_ARGS);
  22 Datum           gbt_bpchar_compress(PG_FUNCTION_ARGS);
  23 Datum           gbt_text_union(PG_FUNCTION_ARGS);
  24 Datum           gbt_text_picksplit(PG_FUNCTION_ARGS);
  25 Datum           gbt_text_consistent(PG_FUNCTION_ARGS);
  26 Datum           gbt_bpchar_consistent(PG_FUNCTION_ARGS);
  27 Datum           gbt_text_penalty(PG_FUNCTION_ARGS);
  28 Datum           gbt_text_same(PG_FUNCTION_ARGS);
  29
  30
  31 /* define for comparison */
  32
  33 static bool
  34 gbt_textgt(const void *a, const void *b)
  35 {
  36         return (DatumGetBool(DirectFunctionCall2WithCollation(text_gt, DEFAULT_COLLATION_OID, PointerGetDatum(a), PointerGetDatum(b))));
  37 }
  38
  39 static bool
  40 gbt_textge(const void *a, const void *b)
  41 {
  42         return (DatumGetBool(DirectFunctionCall2WithCollation(text_ge, DEFAULT_COLLATION_OID, PointerGetDatum(a), PointerGetDatum(b))));
  43 }
  44
  45 static bool
  46 gbt_texteq(const void *a, const void *b)
  47 {
  48         return (DatumGetBool(DirectFunctionCall2WithCollation(texteq, DEFAULT_COLLATION_OID, PointerGetDatum(a), PointerGetDatum(b))));
  49 }
  50
  51 static bool
  52 gbt_textle(const void *a, const void *b)
  53 {
  54         return (DatumGetBool(DirectFunctionCall2WithCollation(text_le, DEFAULT_COLLATION_OID, PointerGetDatum(a), PointerGetDatum(b))));
  55 }
  56
  57 static bool
  58 gbt_textlt(const void *a, const void *b)
  59 {
  60         return (DatumGetBool(DirectFunctionCall2WithCollation(text_lt, DEFAULT_COLLATION_OID, PointerGetDatum(a), PointerGetDatum(b))));
  61 }
  62
  63 static int32
  64 gbt_textcmp(const bytea *a, const bytea *b)
  65 {
  66         return DatumGetInt32(DirectFunctionCall2WithCollation(bttextcmp, DEFAULT_COLLATION_OID, PointerGetDatum(a), PointerGetDatum(b)));
  67 }
  68
  69 static gbtree_vinfo tinfo =
  70 {
  71         gbt_t_text,
  72         0,
  73         FALSE,
  74         gbt_textgt,
  75         gbt_textge,
  76         gbt_texteq,
  77         gbt_textle,
  78         gbt_textlt,
  79         gbt_textcmp,
  80         NULL
  81 };
  82
  83
  84 /**************************************************
  85  * Text ops
  86  **************************************************/
  87
  88
  89 Datum
  90 gbt_text_compress(PG_FUNCTION_ARGS)
  91 {
  92         GISTENTRY  *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
  93
  94         if (tinfo.eml == 0)
  95         {
  96                 tinfo.eml = pg_database_encoding_max_length();
  97         }
  98
  99         PG_RETURN_POINTER(gbt_var_compress(entry, &tinfo));
 100 }
 101
 102 Datum
 103 gbt_bpchar_compress(PG_FUNCTION_ARGS)
 104 {
 105
 106         GISTENTRY  *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
 107         GISTENTRY  *retval;
 108
 109         if (tinfo.eml == 0)
 110         {
 111                 tinfo.eml = pg_database_encoding_max_length();
 112         }
 113
 114         if (entry->leafkey)
 115         {
 116
 117                 Datum           d = DirectFunctionCall1(rtrim1, entry->key);
 118                 GISTENTRY       trim;
 119
 120                 gistentryinit(trim, d,
 121                                           entry->rel, entry->page,
 122                                           entry->offset, TRUE);
 123                 retval = gbt_var_compress(&trim, &tinfo);
 124         }
 125         else
 126                 retval = entry;
 127
 128         PG_RETURN_POINTER(retval);
 129 }
 130
 131
 132
 133 Datum
 134 gbt_text_consistent(PG_FUNCTION_ARGS)
 135 {
 136         GISTENTRY  *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
 137         void       *query = (void *) DatumGetTextP(PG_GETARG_DATUM(1));
 138         StrategyNumber strategy = (StrategyNumber) PG_GETARG_UINT16(2);
 139
 140         /* Oid          subtype = PG_GETARG_OID(3); */
 141         bool       *recheck = (bool *) PG_GETARG_POINTER(4);
 142         bool            retval;
 143         GBT_VARKEY *key = (GBT_VARKEY *) DatumGetPointer(entry->key);
 144         GBT_VARKEY_R r = gbt_var_key_readable(key);
 145
 146         /* All cases served by this function are exact */
 147         *recheck = false;
 148
 149         if (tinfo.eml == 0)
 150         {
 151                 tinfo.eml = pg_database_encoding_max_length();
 152         }
 153
 154         retval = gbt_var_consistent(&r, query, &strategy, GIST_LEAF(entry), &tinfo);
 155
 156         PG_RETURN_BOOL(retval);
 157 }
 158
 159
 160 Datum
 161 gbt_bpchar_consistent(PG_FUNCTION_ARGS)
 162 {
 163         GISTENTRY  *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
 164         void       *query = (void *) DatumGetPointer(PG_DETOAST_DATUM(PG_GETARG_DATUM(1)));
 165         StrategyNumber strategy = (StrategyNumber) PG_GETARG_UINT16(2);
 166
 167         /* Oid          subtype = PG_GETARG_OID(3); */
 168         bool       *recheck = (bool *) PG_GETARG_POINTER(4);
 169         bool            retval;
 170         GBT_VARKEY *key = (GBT_VARKEY *) DatumGetPointer(entry->key);
 171         GBT_VARKEY_R r = gbt_var_key_readable(key);
 172         void       *trim = (void *) DatumGetPointer(DirectFunctionCall1(rtrim1, PointerGetDatum(query)));
 173
 174         /* All cases served by this function are exact */
 175         *recheck = false;
 176
 177         if (tinfo.eml == 0)
 178         {
 179                 tinfo.eml = pg_database_encoding_max_length();
 180         }
 181
 182         retval = gbt_var_consistent(&r, trim, &strategy, GIST_LEAF(entry), &tinfo);
 183         PG_RETURN_BOOL(retval);
 184 }
 185
 186
 187 Datum
 188 gbt_text_union(PG_FUNCTION_ARGS)
 189 {
 190         GistEntryVector *entryvec = (GistEntryVector *) PG_GETARG_POINTER(0);
 191         int32      *size = (int *) PG_GETARG_POINTER(1);
 192
 193         PG_RETURN_POINTER(gbt_var_union(entryvec, size, &tinfo));
 194 }
 195
 196
 197 Datum
 198 gbt_text_picksplit(PG_FUNCTION_ARGS)
 199 {
 200         GistEntryVector *entryvec = (GistEntryVector *) PG_GETARG_POINTER(0);
 201         GIST_SPLITVEC *v = (GIST_SPLITVEC *) PG_GETARG_POINTER(1);
 202
 203         gbt_var_picksplit(entryvec, v, &tinfo);
 204         PG_RETURN_POINTER(v);
 205 }
 206
 207 Datum
 208 gbt_text_same(PG_FUNCTION_ARGS)
 209 {
 210         Datum           d1 = PG_GETARG_DATUM(0);
 211         Datum           d2 = PG_GETARG_DATUM(1);
 212         bool       *result = (bool *) PG_GETARG_POINTER(2);
 213
 214         PG_RETURN_POINTER(gbt_var_same(result, d1, d2, &tinfo));
 215 }
 216
 217
 218 Datum
 219 gbt_text_penalty(PG_FUNCTION_ARGS)
 220 {
 221         GISTENTRY  *o = (GISTENTRY *) PG_GETARG_POINTER(0);
 222         GISTENTRY  *n = (GISTENTRY *) PG_GETARG_POINTER(1);
 223         float      *result = (float *) PG_GETARG_POINTER(2);
 224
 225         PG_RETURN_POINTER(gbt_var_penalty(result, o, n, &tinfo));
 226 }