public String getMasterDatabaseName() {
        return this.masterDatabaseName;
    }
<p>
The meaning of this parameter differs according to the database engine you use.
</p>
<p>
<b>MySQL</b>
</p>
<p>
The name of the database to create when the Lightsail database resource is created. If this parameter isn't
specified, no database is created in the database resource.
</p>
<p>
Constraints:
</p>
<ul>
<li>
<p>
Must contain 1 to 64 letters or numbers.
</p>
</li>
<li>
<p>
Must begin with a letter. Subsequent characters can be letters, underscores, or digits (0- 9).
</p>
</li>
<li>
<p>
Can't be a word reserved by the specified database engine.
</p>
<p>
For more information about reserved words in MySQL, see the Keywords and Reserved Words articles for <a
href="https://dev.mysql.com/doc/refman/5.6/en/keywords.html">MySQL 5.6</a>, <a
href="https://dev.mysql.com/doc/refman/5.7/en/keywords.html">MySQL 5.7</a>, and <a
href="https://dev.mysql.com/doc/refman/8.0/en/keywords.html">MySQL 8.0</a>.
</p>
</li>
</ul>
<p>
<b>PostgreSQL</b>
</p>
<p>
The name of the database to create when the Lightsail database resource is created. If this parameter isn't
specified, a database named <code>postgres</code> is created in the database resource.
</p>
<p>
Constraints:
</p>
<ul>
<li>
<p>
Must contain 1 to 63 letters or numbers.
</p>
</li>
<li>
<p>
Must begin with a letter. Subsequent characters can be letters, underscores, or digits (0- 9).
</p>
</li>
<li>
<p>
Can't be a word reserved by the specified database engine.
</p>
<p>
For more information about reserved words in PostgreSQL, see the SQL Key Words articles for <a
href="https://www.postgresql.org/docs/9.6/sql-keywords-appendix.html">PostgreSQL 9.6</a>, <a
href="https://www.postgresql.org/docs/10/sql-keywords-appendix.html">PostgreSQL 10</a>, <a
href="https://www.postgresql.org/docs/11/sql-keywords-appendix.html">PostgreSQL 11</a>, and <a
href="https://www.postgresql.org/docs/12/sql-keywords-appendix.html">PostgreSQL 12</a>.
</p>
</li>
</ul>

@return The meaning of this parameter differs according to the database engine you use.</p>
        <p>
        <b>MySQL</b>
        </p>
        <p>
        The name of the database to create when the Lightsail database resource is created. If this parameter
        isn't specified, no database is created in the database resource.
        </p>
        <p>
        Constraints:
        </p>
        <ul>
        <li>
        <p>
        Must contain 1 to 64 letters or numbers.
        </p>
        </li>
        <li>
        <p>
        Must begin with a letter. Subsequent characters can be letters, underscores, or digits (0- 9).
        </p>
        </li>
        <li>
        <p>
        Can't be a word reserved by the specified database engine.
        </p>
        <p>
        For more information about reserved words in MySQL, see the Keywords and Reserved Words articles for <a
        href="https://dev.mysql.com/doc/refman/5.6/en/keywords.html">MySQL 5.6</a>, <a
        href="https://dev.mysql.com/doc/refman/5.7/en/keywords.html">MySQL 5.7</a>, and <a
        href="https://dev.mysql.com/doc/refman/8.0/en/keywords.html">MySQL 8.0</a>.
        </p>
        </li>
        </ul>
        <p>
        <b>PostgreSQL</b>
        </p>
        <p>
        The name of the database to create when the Lightsail database resource is created. If this parameter
        isn't specified, a database named <code>postgres</code> is created in the database resource.
        </p>
        <p>
        Constraints:
        </p>
        <ul>
        <li>
        <p>
        Must contain 1 to 63 letters or numbers.
        </p>
        </li>
        <li>
        <p>
        Must begin with a letter. Subsequent characters can be letters, underscores, or digits (0- 9).
        </p>
        </li>
        <li>
        <p>
        Can't be a word reserved by the specified database engine.
        </p>
        <p>
        For more information about reserved words in PostgreSQL, see the SQL Key Words articles for <a
        href="https://www.postgresql.org/docs/9.6/sql-keywords-appendix.html">PostgreSQL 9.6</a>, <a
        href="https://www.postgresql.org/docs/10/sql-keywords-appendix.html">PostgreSQL 10</a>, <a
        href="https://www.postgresql.org/docs/11/sql-keywords-appendix.html">PostgreSQL 11</a>, and <a
        href="https://www.postgresql.org/docs/12/sql-keywords-appendix.html">PostgreSQL 12</a>.
        </p>
        </li>
aws-java-sdk-lightsail/src/main/java/com/amazonaws/services/lightsail/model/CreateRelationalDatabaseRequest.java