Function ArrayExtractDatums

pg_documentdb_core/src/utils/list_utils.c:237–254

* ArrayExtractDatums extracts Datums of given type from given array. */

 * ArrayExtractDatums extracts Datums of given type from given array.
 */
void
ArrayExtractDatums(ArrayType *array, Oid elemType,
				   Datum **elems, bool **nulls, int *nelems)
{
	HeapTuple typeTup = SearchSysCache1(TYPEOID, ObjectIdGetDatum(elemType));
	if (!HeapTupleIsValid(typeTup))
	{
		ereport(ERROR, (errmsg("cache lookup failed for type %u", elemType)));
	}

	Form_pg_type typeStruct = (Form_pg_type) GETSTRUCT(typeTup);

	deconstruct_array(array, elemType, typeStruct->typlen,
					  typeStruct->typbyval, typeStruct->typalign,
					  elems, nulls, nelems);

	ReleaseSysCache(typeTup);
}