Function initArrayResultAny

src/backend/utils/adt/arrayfuncs.c:5665–5700

* initArrayResultAny - initialize an empty ArrayBuildStateAny * * input_type is the input datatype (either element or array type) * rcontext is where to keep working state * subcontext is a flag determining whether to use a separate memory context */

 *	subcontext is a flag determining whether to use a separate memory context
 */
ArrayBuildStateAny *
initArrayResultAny(Oid input_type, MemoryContext rcontext, bool subcontext)
{
	ArrayBuildStateAny *astate;
	Oid			element_type = get_element_type(input_type);

	if (OidIsValid(element_type))
	{
		/* Array case */
		ArrayBuildStateArr *arraystate;

		arraystate = initArrayResultArr(input_type, InvalidOid, rcontext, subcontext);
		astate = (ArrayBuildStateAny *)
			MemoryContextAlloc(arraystate->mcontext,
							   sizeof(ArrayBuildStateAny));
		astate->scalarstate = NULL;
		astate->arraystate = arraystate;
	}
	else
	{
		/* Scalar case */
		ArrayBuildState *scalarstate;

		/* Let's just check that we have a type that can be put into arrays */
		Assert(OidIsValid(get_array_type(input_type)));

		scalarstate = initArrayResult(input_type, rcontext, subcontext);
		astate = (ArrayBuildStateAny *)
			MemoryContextAlloc(scalarstate->mcontext,
							   sizeof(ArrayBuildStateAny));
		astate->scalarstate = scalarstate;
		astate->arraystate = NULL;
	}

	return astate;
}

/*
 * accumArrayResultAny - accumulate one (more) input for an array result