PostGIS  2.1.10dev-r@@SVN_REVISION@@
Datum gserialized_gist_consistent_2d ( PG_FUNCTION_ARGS  )

Definition at line 991 of file gserialized_gist_2d.c.

References FALSE, gserialized_datum_get_box2df_p(), gserialized_gist_consistent_internal_2d(), gserialized_gist_consistent_leaf_2d(), LW_FAILURE, and result.

992 {
993  GISTENTRY *entry = (GISTENTRY*) PG_GETARG_POINTER(0);
994  StrategyNumber strategy = (StrategyNumber) PG_GETARG_UINT16(2);
995  bool result;
996  BOX2DF query_gbox_index;
997 
998  /* PostgreSQL 8.4 and later require the RECHECK flag to be set here,
999  rather than being supplied as part of the operator class definition */
1000  bool *recheck = (bool *) PG_GETARG_POINTER(4);
1001 
1002  /* We set recheck to false to avoid repeatedly pulling every "possibly matched" geometry
1003  out during index scans. For cases when the geometries are large, rechecking
1004  can make things twice as slow. */
1005  *recheck = false;
1006 
1007  POSTGIS_DEBUG(4, "[GIST] 'consistent' function called");
1008 
1009  /* Quick sanity check on query argument. */
1010  if ( DatumGetPointer(PG_GETARG_DATUM(1)) == NULL )
1011  {
1012  POSTGIS_DEBUG(4, "[GIST] null query pointer (!?!), returning false");
1013  PG_RETURN_BOOL(FALSE); /* NULL query! This is screwy! */
1014  }
1015 
1016  /* Quick sanity check on entry key. */
1017  if ( DatumGetPointer(entry->key) == NULL )
1018  {
1019  POSTGIS_DEBUG(4, "[GIST] null index entry, returning false");
1020  PG_RETURN_BOOL(FALSE); /* NULL entry! */
1021  }
1022 
1023  /* Null box should never make this far. */
1024  if ( gserialized_datum_get_box2df_p(PG_GETARG_DATUM(1), &query_gbox_index) == LW_FAILURE )
1025  {
1026  POSTGIS_DEBUG(4, "[GIST] null query_gbox_index!");
1027  PG_RETURN_BOOL(FALSE);
1028  }
1029 
1030  /* Treat leaf node tests different from internal nodes */
1031  if (GIST_LEAF(entry))
1032  {
1034  (BOX2DF*)DatumGetPointer(entry->key),
1035  &query_gbox_index, strategy);
1036  }
1037  else
1038  {
1040  (BOX2DF*)DatumGetPointer(entry->key),
1041  &query_gbox_index, strategy);
1042  }
1043 
1044  PG_RETURN_BOOL(result);
1045 }
static bool gserialized_gist_consistent_leaf_2d(BOX2DF *key, BOX2DF *query, StrategyNumber strategy)
char ** result
Definition: liblwgeom.h:218
#define LW_FAILURE
Definition: liblwgeom.h:54
static int gserialized_datum_get_box2df_p(Datum gsdatum, BOX2DF *box2df)
Peak into a GSERIALIZED datum to find the bounding box.
#define FALSE
Definition: dbfopen.c:169
static bool gserialized_gist_consistent_internal_2d(BOX2DF *key, BOX2DF *query, StrategyNumber strategy)

Here is the call graph for this function: