unnamed columns in tuple
<?xml version='1.0' encoding='UTF-8' ?>
<result>
	<meta>
		<columns>
			<column>
				<name>s</name>
				<type>String</type>
			</column>
			<column>
				<name>'Hello\n&lt;World>'</name>
				<type>String</type>
			</column>
			<column>
				<name>time</name>
				<type>DateTime</type>
			</column>
			<column>
				<name>arr</name>
				<type>Array(String)</type>
			</column>
			<column>
				<name>tpl</name>
				<type>Tuple(String, DateTime)</type>
			</column>
		</columns>
	</meta>
	<data>
		<row>
			<s>Hello &amp; world</s>
			<field>Hello
&lt;World></field>
			<time>2001-02-03 04:05:06</time>
			<arr><array><elem>0</elem><elem>1</elem><elem>2</elem><elem>3</elem><elem>4</elem><elem>5</elem><elem>6</elem><elem>7</elem><elem>8</elem><elem>9</elem></array></arr>
			<tpl><tuple><elem>Hello &amp; world</elem><elem>2001-02-03 04:05:06</elem></tuple></tpl>
		</row>
	</data>
	<extremes>
		<min>
			<s>Hello &amp; world</s>
			<field>Hello
&lt;World></field>
			<time>2001-02-03 04:05:06</time>
			<arr><array><elem>0</elem><elem>1</elem><elem>2</elem><elem>3</elem><elem>4</elem><elem>5</elem><elem>6</elem><elem>7</elem><elem>8</elem><elem>9</elem></array></arr>
			<tpl><tuple><elem>Hello &amp; world</elem><elem>2001-02-03 04:05:06</elem></tuple></tpl>
		</min>
		<max>
			<s>Hello &amp; world</s>
			<field>Hello
&lt;World></field>
			<time>2001-02-03 04:05:06</time>
			<arr><array><elem>0</elem><elem>1</elem><elem>2</elem><elem>3</elem><elem>4</elem><elem>5</elem><elem>6</elem><elem>7</elem><elem>8</elem><elem>9</elem></array></arr>
			<tpl><tuple><elem>Hello &amp; world</elem><elem>2001-02-03 04:05:06</elem></tuple></tpl>
		</max>
	</extremes>
	<rows>1</rows>
</result>
named columns in tuple
<?xml version='1.0' encoding='UTF-8' ?>
<result>
	<meta>
		<columns>
			<column>
				<name>s</name>
				<type>String</type>
			</column>
			<column>
				<name>time</name>
				<type>DateTime</type>
			</column>
			<column>
				<name>tpl</name>
				<type>Tuple(String, DateTime)</type>
			</column>
		</columns>
	</meta>
	<data>
		<row>
			<s>Hello &amp; world</s>
			<time>2001-02-03 04:05:06</time>
			<tpl><tuple><elem>Hello &amp; world</elem><elem>2001-02-03 04:05:06</elem></tuple></tpl>
		</row>
	</data>
	<extremes>
		<min>
			<s>Hello &amp; world</s>
			<time>2001-02-03 04:05:06</time>
			<tpl><tuple><elem>Hello &amp; world</elem><elem>2001-02-03 04:05:06</elem></tuple></tpl>
		</min>
		<max>
			<s>Hello &amp; world</s>
			<time>2001-02-03 04:05:06</time>
			<tpl><tuple><elem>Hello &amp; world</elem><elem>2001-02-03 04:05:06</elem></tuple></tpl>
		</max>
	</extremes>
	<rows>1</rows>
</result>