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<a href="../c3ref/intro.html"><h2>SQLite C Interface</h2></a>
<h2>Finding The Subtype Of SQL Values</h2>
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<blockquote><pre>
unsigned int sqlite3_value_subtype(sqlite3_value*);
</pre></blockquote>
<p>
The sqlite3_value_subtype(V) function returns the subtype for
an <a href="../appfunc.html">application-defined SQL function</a> argument V. The subtype
information can be used to pass a limited amount of context from
one SQL function to another. Use the <a href="../c3ref/result_subtype.html">sqlite3_result_subtype()</a>
routine to set the subtype for the return value of an SQL function.</p>
<p>Every <a href="../appfunc.html">application-defined SQL function</a> that invoke this interface
should include the <a href="../c3ref/c_deterministic.html#sqlitesubtype">SQLITE_SUBTYPE</a> property in the text
encoding argument when the function is <a href="../c3ref/create_function.html">registered</a>.
If the <a href="../c3ref/c_deterministic.html#sqlitesubtype">SQLITE_SUBTYPE</a> property is omitted, then sqlite3_value_subtype()
might return zero instead of the upstream subtype in some corner cases.
</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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