PostGIS  2.5.2dev-r@@SVN_REVISION@@

◆ gserialized_gist_union_2d()

Datum gserialized_gist_union_2d ( PG_FUNCTION_ARGS  )

Definition at line 1443 of file gserialized_gist_2d.c.

References box2df_copy(), box2df_merge(), box2df_to_string(), gserialized_gist_same_2d(), and PG_FUNCTION_INFO_V1().

Referenced by gserialized_gist_penalty_2d().

1444 {
1445  GistEntryVector *entryvec = (GistEntryVector *) PG_GETARG_POINTER(0);
1446  int *sizep = (int *) PG_GETARG_POINTER(1); /* Size of the return value */
1447  int numranges, i;
1448  BOX2DF *box_cur, *box_union;
1449 
1450  POSTGIS_DEBUG(4, "[GIST] 'union' function called");
1451 
1452  numranges = entryvec->n;
1453 
1454  box_cur = (BOX2DF*) DatumGetPointer(entryvec->vector[0].key);
1455 
1456  box_union = box2df_copy(box_cur);
1457 
1458  for ( i = 1; i < numranges; i++ )
1459  {
1460  box_cur = (BOX2DF*) DatumGetPointer(entryvec->vector[i].key);
1461  box2df_merge(box_union, box_cur);
1462  }
1463 
1464  *sizep = sizeof(BOX2DF);
1465 
1466  POSTGIS_DEBUGF(4, "[GIST] 'union', numranges(%i), pageunion %s", numranges, box2df_to_string(box_union));
1467 
1468  PG_RETURN_POINTER(box_union);
1469 
1470 }
BOX2DF * box2df_copy(BOX2DF *b)
static char * box2df_to_string(const BOX2DF *a)
void box2df_merge(BOX2DF *b_union, BOX2DF *b_new)
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