Function par_plan

src/gpre/sqe.cpp:2345–2377

//

static gpre_nod* par_plan( gpre_req* request)
{
	assert_IS_REQ(request);

	// parse the join type

	nod_t nod_type;
	if (MSC_match(KW_JOIN))
		nod_type = nod_join;
	else if (MSC_match(KW_MERGE))
		nod_type = nod_merge;
	else if (MSC_match(KW_SORT) && MSC_match(KW_MERGE))
		nod_type = nod_merge;
	else
		nod_type = nod_join;

	// make up the plan expression node

	gpre_nod* plan_expression = MSC_node(nod_plan_expr, 2);

	if (nod_type != nod_join)
		plan_expression->nod_arg[0] = MSC_node(nod_type, 0);

	// parse the plan items at this level

	EXP_left_paren(0);

	plan_expression->nod_arg[1] = SQE_list(par_plan_item, request, false);

	if (!EXP_match_paren())
		return NULL;
	return plan_expression;
}


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