framework/db/mssql/Schema.php
protected function loadTableSchema($name)
    {
        $table = new TableSchema();
        $this->resolveTableNames($table, $name);
        $this->findPrimaryKeys($table);
        if ($this->findColumns($table)) {
            $this->findForeignKeys($table);
            return $table;
        }

        return null;
    }
protected function loadTableSchema($name)
    {
        $table = new TableSchema();
        $this->resolveTableNames($table, $name);
        $this->findPrimaryKeys($table);
        if ($this->findColumns($table)) {
            $this->findForeignKeys($table);
            return $table;
        }

        return null;
    }
{@inheritdoc}