Function pair

src/gpre/sql.cpp:5548–5594

//

static void pair( gpre_nod* expr, gpre_nod* field_expr)
{
	if (field_expr->nod_type != nod_field)
		return;

	switch (expr->nod_type)
	{
	case nod_value:
		{
			ref* ref1 = (ref*) field_expr->nod_arg[0];
			ref* ref2 = (ref*) expr->nod_arg[0];

			// We're done if we've already determined the type of this reference
			// (if, for instance, it's a parameter to a udf or PROCEDURE)

			if (ref2->ref_field)
				return;

			ref2->ref_field = ref1->ref_field;
			if (ref1->ref_field->fld_array)
			{
				ref2->ref_context = ref1->ref_context;
				ref2->ref_friend = ref1;
				EXP_post_array(ref1);
				EXP_post_array(ref2);
			}
		}
		return;

	case nod_map_ref:
		{
			mel* element = (mel*) expr->nod_arg[0];
			pair(element->mel_expr, field_expr);
		}
		return;

	case nod_field:
	case nod_literal:
		return;
	}

	gpre_nod** ptr = expr->nod_arg;
	const gpre_nod* const* const end_ptr = ptr + expr->nod_count;

	for (; ptr < end_ptr; ptr++)
		pair(*ptr, field_expr);
}


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