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<h1>22. Virtuoso Functions Guide - result</h1>
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<div id="text">
<h2>result</h2>
<div class="refpurpose">Sends one row of results to the calling client.</div>
<div class="funcsynopsis">
<span class="funcdef">
<span class="function">result</span>
</span>
(<span class="paramdef">in <span class="parameter">col_1</span> any</span>,
<span class="paramdef">
<span class="parameter">..</span> </span>,
<span class="paramdef">in <span class="parameter">col_n</span> any</span>);
</div>
<div class="refsect1">
<div class="refsect1title">Description</div>
<p>The <span class="computeroutput">result_names()</span>
predefines variables to be used in a result set to follow. The variables must
be previously declared, from which the column data types are ascertained.
This assigns the meta data but does not send any results. The
<span class="computeroutput">result()</span> function sends its parameters as a single row
of results. These parameters should be compatible with those in the previous
<span class="computeroutput">result_names()</span>. The <span class="computeroutput">end_results()</span>
function can be used to separate multiple result sets. The
<span class="computeroutput">result_names()</span> can then be used to alter
the structure of the next result set.</p>
<p>The <span class="computeroutput">result_names()</span> call can be omitted if
the application already knows what columns and their types are to be returned.</p>
</div>
<div class="refsect1">
<div class="refsect1title">Parameters</div>
<div class="refsect2">col_1, ..., col_n<span class="refsect2title"> – </span>
The data to be sent to the client.
</div>
</div>
<div class="refsect1">
<div class="refsect1title">Examples</div>
<a name="ex_result" />
<div class="example">
<div class="exampletitle" />
<p>This examples demonstrates outputting multiple result sets from a
stored procedure. This procedure can be entered using ISQL but ISQL does not
support multiple result sets. To view the output you can use the
the sample application odbctest or another application supporting multiple result
sets.
The RES procedure, below, returns two result sets, the first with two rows and
the second with four rows. The result_names function gives each result column
a type and title. This can be omitted if the application knows which columns
to expect. The result function sends the actual result row. The end_result function
indicates that a new result set will begin. These functions can be used inside
loops or subprocedures, thus allowing one call to yield a variable number of
result sets.</p>
<div>
<pre class="programlisting">
CREATE PROCEDURE RES (IN I INTEGER)
{
DECLARE STR, STR2 VARCHAR;
RESULT_NAMES (I, STR);
RESULT (I, 'FIRST');
RESULT (I + 1, 'SECOND');
RESULT_NAMES (I, STR, STR2);
END_RESULT ();
RESULT (I, 'FIRST');
RESULT (I + 1, 'SECOND');
RESULT (I + 2, 'THIRD', 'FF');
RESULT (I + 3, 'FOURTH', 'FF');
RETURN 1;
}</pre>
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<div class="refsect1title">See Also</div>
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<a href="fn_result_names.html">result_names()</a>
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<a href="fn_end_result.html">end_result()</a>
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