Function resolveUsingField

src/jrd/RecordSourceNodes.cpp:4143–4169

Resolve a field for JOIN USING purposes.

// Resolve a field for JOIN USING purposes.
static ValueExprNode* resolveUsingField(DsqlCompilerScratch* dsqlScratch, const MetaName& name,
	ValueListNode* list, const FieldNode* flawedNode, const TEXT* side, dsql_ctx*& ctx)
{
	ValueExprNode* node = PASS1_lookup_alias(dsqlScratch, name, list, false);

	if (!node)
	{
		string qualifier;
		qualifier.printf("<%s side of USING>", side);
		PASS1_field_unknown(qualifier.c_str(), name.c_str(), flawedNode);
	}

	DsqlAliasNode* aliasNode;
	FieldNode* fieldNode;
	DerivedFieldNode* derivedField;

	if ((aliasNode = nodeAs<DsqlAliasNode>(node)))
		ctx = aliasNode->implicitJoin->visibleInContext;
	else if ((fieldNode = nodeAs<FieldNode>(node)))
		ctx = fieldNode->dsqlContext;
	else if ((derivedField = nodeAs<DerivedFieldNode>(node)))
		ctx = derivedField->context;
	else
		fb_assert(false);

	return node;
}