PostGIS  2.5.0dev-r@@SVN_REVISION@@

◆ pgis_geometry_union_finalfn()

Datum pgis_geometry_union_finalfn ( PG_FUNCTION_ARGS  )

Definition at line 205 of file lwgeom_accum.c.

References PG_FUNCTION_INFO_V1(), pgis_accum_finalfn(), pgis_geometry_collect_finalfn(), pgis_union_geometry_array(), and PGISDirectFunctionCall1().

Referenced by pgis_geometry_accum_finalfn().

206 {
207  pgis_abs *p;
208  Datum result = 0;
209  Datum geometry_array = 0;
210 
211  if (PG_ARGISNULL(0))
212  PG_RETURN_NULL(); /* returns null iff no input values */
213 
214  p = (pgis_abs*) PG_GETARG_POINTER(0);
215 
216  geometry_array = pgis_accum_finalfn(p, CurrentMemoryContext, fcinfo);
217  result = PGISDirectFunctionCall1( pgis_union_geometry_array, geometry_array );
218  if (!result)
219  PG_RETURN_NULL();
220 
221  PG_RETURN_DATUM(result);
222 }
Datum pgis_accum_finalfn(pgis_abs *p, MemoryContext mctx, FunctionCallInfo fcinfo)
Datum pgis_union_geometry_array(PG_FUNCTION_ARGS)
Datum PGISDirectFunctionCall1(PGFunction func, Datum arg1)
A modified version of PostgreSQL's DirectFunctionCall1 which allows NULL results; this is required fo...
Definition: lwgeom_accum.c:360
To pass the internal ArrayBuildState pointer between the transfn and finalfn we need to wrap it into ...
Definition: lwgeom_accum.c:81
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