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<a href="intro.html"><h2>SQLite C Interface</h2></a><h2>Status Parameters for prepared statements</h2><blockquote><pre>#define SQLITE_STMTSTATUS_FULLSCAN_STEP 1
#define SQLITE_STMTSTATUS_SORT 2
#define SQLITE_STMTSTATUS_AUTOINDEX 3
#define SQLITE_STMTSTATUS_VM_STEP 4
</pre></blockquote><p>
These preprocessor macros define integer codes that name counter
values associated with the <a href="../c3ref/stmt_status.html">sqlite3_stmt_status()</a> interface.
The meanings of the various counters are as follows:</p>
<p><dl>
<a name="sqlitestmtstatusfullscanstep"></a>
<dt>SQLITE_STMTSTATUS_FULLSCAN_STEP</dt>
<dd>This is the number of times that SQLite has stepped forward in
a table as part of a full table scan. Large numbers for this counter
may indicate opportunities for performance improvement through
careful use of indices.</dd></p>
<p><a name="sqlitestmtstatussort"></a>
<dt>SQLITE_STMTSTATUS_SORT</dt>
<dd>This is the number of sort operations that have occurred.
A non-zero value in this counter may indicate an opportunity to
improvement performance through careful use of indices.</dd></p>
<p><a name="sqlitestmtstatusautoindex"></a>
<dt>SQLITE_STMTSTATUS_AUTOINDEX</dt>
<dd>This is the number of rows inserted into transient indices that
were created automatically in order to help joins run faster.
A non-zero value in this counter may indicate an opportunity to
improvement performance by adding permanent indices that do not
need to be reinitialized each time the statement is run.</dd></p>
<p><a name="sqlitestmtstatusvmstep"></a>
<dt>SQLITE_STMTSTATUS_VM_STEP</dt>
<dd>This is the number of virtual machine operations executed
by the prepared statement if that number is less than or equal
to 2147483647. The number of virtual machine operations can be
used as a proxy for the total work done by the prepared statement.
If the number of virtual machine operations exceeds 2147483647
then the value returned by this statement status code is undefined.
</dd>
</dl>
</p><p>See also lists of
<a href="objlist.html">Objects</a>,
<a href="constlist.html">Constants</a>, and
<a href="funclist.html">Functions</a>.</p>
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