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<title>Setting The Subtype Of An SQL Function</title>
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<a href="../c3ref/intro.html"><h2>SQLite C Interface</h2></a>
<h2>Setting The Subtype Of An SQL Function</h2>
</div>
<blockquote><pre>
void sqlite3_result_subtype(sqlite3_context*,unsigned int);
</pre></blockquote>
<p>
The sqlite3_result_subtype(C,T) function causes the subtype of
the result from the <a href="../appfunc.html">application-defined SQL function</a> with
<a href="../c3ref/context.html">sqlite3_context</a> C to be the value T. Only the lower 8 bits
of the subtype T are preserved in current versions of SQLite;
higher order bits are discarded.
The number of subtype bytes preserved by SQLite might increase
in future releases of SQLite.</p>
<p>Every <a href="../appfunc.html">application-defined SQL function</a> that invokes this interface
should include the <a href="../c3ref/c_deterministic.html#sqliteresultsubtype">SQLITE_RESULT_SUBTYPE</a> property in its
text encoding argument when the SQL function is
<a href="../c3ref/create_function.html">registered</a>. If the <a href="../c3ref/c_deterministic.html#sqliteresultsubtype">SQLITE_RESULT_SUBTYPE</a>
property is omitted from the function that invokes sqlite3_result_subtype(),
then in some cases the sqlite3_result_subtype() might fail to set
the result subtype.</p>
<p>If SQLite is compiled with -DSQLITE_STRICT_SUBTYPE=1, then any
SQL function that invokes the sqlite3_result_subtype() interface
and that does not have the SQLITE_RESULT_SUBTYPE property will raise
an error. Future versions of SQLite might enable -DSQLITE_STRICT_SUBTYPE=1
by default.
</p><p>See also lists of
<a href="../c3ref/objlist.html">Objects</a>,
<a href="../c3ref/constlist.html">Constants</a>, and
<a href="../c3ref/funclist.html">Functions</a>.</p>
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