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+<!-- keywords: sqlite3_stmt_scanstatus -->
+<div class=nosearch>
+<a href="intro.html"><h2>SQLite C Interface</h2></a>
+<h2>Prepared Statement Scan Status</h2>
+</div>
+<blockquote><pre>
+int sqlite3_stmt_scanstatus(
+  sqlite3_stmt *pStmt,      /* Prepared statement for which info desired */
+  int idx,                  /* Index of loop to report on */
+  int iScanStatusOp,        /* Information desired.  SQLITE_SCANSTAT_* */
+  void *pOut                /* Result written here */
+);
+</pre></blockquote>
+<p>
+This interface returns information about the predicted and measured
+performance for pStmt.  Advanced applications can use this
+interface to compare the predicted and the measured performance and
+issue warnings and/or rerun <a href="../lang_analyze.html">ANALYZE</a> if discrepancies are found.</p>
+
+<p>Since this interface is expected to be rarely used, it is only
+available if SQLite is compiled using the <a href="../compile.html#enable_stmt_scanstatus">SQLITE_ENABLE_STMT_SCANSTATUS</a>
+compile-time option.</p>
+
+<p>The "iScanStatusOp" parameter determines which status information to return.
+The "iScanStatusOp" must be one of the <a href="../c3ref/c_scanstat_est.html">scanstatus options</a> or the behavior
+of this interface is undefined.
+The requested measurement is written into a variable pointed to by
+the "pOut" parameter.
+Parameter "idx" identifies the specific loop to retrieve statistics for.
+Loops are numbered starting from zero. If idx is out of range - less than
+zero or greater than or equal to the total number of loops used to implement
+the statement - a non-zero value is returned and the variable that pOut
+points to is unchanged.</p>
+
+<p>Statistics might not be available for all loops in all statements. In cases
+where there exist loops with no available statistics, this function behaves
+as if the loop did not exist - it returns non-zero and leave the variable
+that pOut points to unchanged.</p>
+
+<p>See also: <a href="../c3ref/stmt_scanstatus_reset.html">sqlite3_stmt_scanstatus_reset()</a>
+</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>
+