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

Definition at line 263 of file lwgeom_accum.c.

References LWGEOM_makeline_garray(), pgis_accum_finalfn(), PGISDirectFunctionCall1(), and result.

264 {
265  pgis_abs *p;
266  Datum result = 0;
267  Datum geometry_array = 0;
268 
269  if (PG_ARGISNULL(0))
270  PG_RETURN_NULL(); /* returns null iff no input values */
271 
272  p = (pgis_abs*) PG_GETARG_POINTER(0);
273 
274  geometry_array = pgis_accum_finalfn(p, CurrentMemoryContext, fcinfo);
275  result = PGISDirectFunctionCall1( LWGEOM_makeline_garray, geometry_array );
276  if (!result)
277  PG_RETURN_NULL();
278 
279  PG_RETURN_DATUM(result);
280 }
Datum pgis_accum_finalfn(pgis_abs *p, MemoryContext mctx, FunctionCallInfo fcinfo)
The final function rescues the built array from the side memory context using the PostgreSQL built-in...
Definition: lwgeom_accum.c:143
Datum LWGEOM_makeline_garray(PG_FUNCTION_ARGS)
char ** result
Definition: liblwgeom.h:218
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:287
To pass the internal ArrayBuildState pointer between the transfn and finalfn we need to wrap it into ...
Definition: lwgeom_accum.c:61

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