framework/db/Schema.php
public function quoteSimpleTableName($name)
    {
        if (is_string($this->tableQuoteCharacter)) {
            $startingCharacter = $endingCharacter = $this->tableQuoteCharacter;
        } else {
            list($startingCharacter, $endingCharacter) = $this->tableQuoteCharacter;
        }
        return strpos($name, $startingCharacter) !== false ? $name : $startingCharacter . $name . $endingCharacter;
    }
public function quoteSimpleTableName($name)
    {
        if (is_string($this->tableQuoteCharacter)) {
            $startingCharacter = $endingCharacter = $this->tableQuoteCharacter;
        } else {
            list($startingCharacter, $endingCharacter) = $this->tableQuoteCharacter;
        }
        return strpos($name, $startingCharacter) !== false ? $name : $startingCharacter . $name . $endingCharacter;
    }
Quotes a simple table name for use in a query.
A simple table name should contain the table name only without any schema prefix.
If the table name is already quoted, this method will do nothing.
@param string $name table name
@return string the properly quoted table name