Add the sqlite3_expanded_sql() interface. Refinements to the

sqlite3_trace_v2() interface to make it more useful.

FossilOrigin-Name: 99ee7ee58d45b29a0000492306ddc0b90563ff51

src/vdbeaux.c

@@ -72,6 +72,21 @@ const char *sqlite3_sql(sqlite3_stmt *pStmt){
   return p ? p->zSql : 0;
 }
 
+/*
+** Return the SQL associated with a prepared statement with
+** bound parameters expanded.  Space to hold the returned string is
+** obtained from sqlite3_malloc().  The caller is responsible for
+** freeing the returned string by passing it to sqlite3_free().
+**
+** The SQLITE_TRACE_SIZE_LIMIT puts an upper bound on the size of
+** expanded bound parameters.
+*/
+char *sqlite3_expanded_sql(sqlite3_stmt *pStmt){
+  Vdbe *p = (Vdbe *)pStmt;
+  return p ? sqlite3VdbeExpandSql(p, p->zSql) : 0;
+  if( p->zSql==0 ) return 0;
+}
+
 /*
 ** Swap all content between two VDBE structures.
 */