PostGIS  3.1.6dev-r@@SVN_REVISION@@

◆ gserialized_gist_union_2d()

Datum gserialized_gist_union_2d ( PG_FUNCTION_ARGS  )

Definition at line 1259 of file gserialized_gist_2d.c.

1260 {
1261  GistEntryVector *entryvec = (GistEntryVector *) PG_GETARG_POINTER(0);
1262  int *sizep = (int *) PG_GETARG_POINTER(1); /* Size of the return value */
1263  int numranges, i;
1264  BOX2DF *box_cur, *box_union;
1265 
1266  POSTGIS_DEBUG(4, "[GIST] 'union' function called");
1267 
1268  numranges = entryvec->n;
1269 
1270  box_cur = (BOX2DF*) DatumGetPointer(entryvec->vector[0].key);
1271 
1272  box_union = box2df_copy(box_cur);
1273 
1274  for ( i = 1; i < numranges; i++ )
1275  {
1276  box_cur = (BOX2DF*) DatumGetPointer(entryvec->vector[i].key);
1277  box2df_merge(box_union, box_cur);
1278  }
1279 
1280  *sizep = sizeof(BOX2DF);
1281 
1282  POSTGIS_DEBUGF(4, "[GIST] 'union', numranges(%i), pageunion %s", numranges, box2df_to_string(box_union));
1283 
1284  PG_RETURN_POINTER(box_union);
1285 
1286 }
static char * box2df_to_string(const BOX2DF *a)
void box2df_merge(BOX2DF *b_union, BOX2DF *b_new)
BOX2DF * box2df_copy(BOX2DF *b)

References box2df_copy(), box2df_merge(), and box2df_to_string().

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