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<h1>22. Virtuoso Functions Guide - blob_to_string_output</h1>
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<h2>blob_to_string_output</h2>
<div class="refpurpose">Convert a blob to string session</div>
<div class="funcsynopsis">
<span class="funcdef">varchar <span class="function">blob_to_string_output</span>
</span>
(<span class="paramdef">in <span class="parameter">blob</span>any</span>);
</div>
<div class="refsect1">
<div class="refsect1title">Description</div>
<p>Although primarily used for converting <span class="computeroutput">blobs</span> (<span class="computeroutput">long varbinary</span>,
<span class="computeroutput">long varchar</span>) to <span class="computeroutput">string output object</span>,
<span class="computeroutput">blob_to_string_output</span> may also be used to convert from
<span class="computeroutput">wide string</span>, <span class="computeroutput">persistent XML (XPER)</span> and
<span class="computeroutput">string_output streams</span>.</p>
</div>
<div class="refsect1">
<div class="refsect1title">Parameters</div>
<div class="refsect2">
<span class="refsect2title">blob – </span>
<span class="computeroutput">blob handle</span> (long varbinary or long varchar), <span class="computeroutput">string_output</span> or <span class="computeroutput">XPER</span> (persistent XML)
</div>
</div>
<div class="refsect1">
<div class="refsect1title">Return types</div>
<p>
<span class="computeroutput">string output object</span> contents of <span class="computeroutput">blob</span>.</p>
</div>
<div class="refsect1title">Errors</div>
<table class="data">
<tr>
<th class="data">SQLState</th>
<th class="data">Error Code</th>
<th class="data">Error Text</th>
<th class="data">Description</th>
</tr>
<tr>
<td class="data">
<a name="err22023" />
<span class="errorcode">22023</span>
</td>
<td class="data">
<a name="errSR068" />
<span class="errorcode">SR068</span>
</td>
<td class="data">
<span class="errorname">XML tree cannot be used as argument of blob_to_string_output</span>
</td>
<td class="data" />
</tr>
<tr>
<td class="data">
<a name="err22023" />
<span class="errorcode">22023</span>
</td>
<td class="data">
<a name="errSR070" />
<span class="errorcode">SR070</span>
</td>
<td class="data">
<span class="errorname">blob_to_string_output requires a blob or string argument</span>
</td>
<td class="data" />
</tr>
<tr>
<td class="data">
<a name="err22023" />
<span class="errorcode">22023</span>
</td>
<td class="data">
<a name="errSR071" />
<span class="errorcode">SR071</span>
</td>
<td class="data">
<span class="errorname">Blob argument to blob_to_string_output must be a non-interactive blob</span>
</td>
<td class="data" />
</tr>
</table>
<br />
<p />
<div class="refsect1">
<div class="refsect1title">Examples</div>
<a name="ex_blob_to_string_output" />
<div class="example">
<div class="exampletitle">Various conversions</div>
<div>
<pre class="screen">SQL> use Demo;
Done. -- 20 msec.
SQL> select string_output_string (blob_to_string_output ("Description")) from "Categories";
callret
VARCHAR
_______________________________________________________________________________
Soft drinks, coffees, teas, beers, and ales
Sweet and savory sauces, relishes, spreads, and seasonings
Desserts, candies, and sweet breads
Cheeses
Breads, crackers, pasta, and cereal
Prepared meats
Dried fruit and bean curd
Seaweed and fish
8 Rows. -- 37 msec.
SQL>
</pre>
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<div class="refsect1">
<div class="refsect1title">See Also</div>
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<a href="fn_blob_to_string.html">blob_to_string</a>
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