Add Statement::getExtendedSQL()

- it returns a UTF-8 string containing the SQL text of prepared statement with
   bound parameters expanded

include/SQLiteCpp/Statement.h

@@ -608,6 +608,10 @@ public:
     {
         return mQuery;
     }
+
+    // Return a UTF-8 string containing the SQL text of prepared statement with bound parameters expanded.
+    std::string getExtendedSQL();
+
     /// Return the number of columns in the result set returned by the prepared statement
     inline int getColumnCount() const
     {

src/Statement.cpp

@@ -401,17 +401,24 @@ int Statement::getErrorCode() const noexcept // nothrow
 {
     return sqlite3_errcode(mStmtPtr);
 }
+
 // Return the extended numeric result code for the most recent failed API call (if any).
 int Statement::getExtendedErrorCode() const noexcept // nothrow
 {
     return sqlite3_extended_errcode(mStmtPtr);
 }
+
 // Return UTF-8 encoded English language explanation of the most recent failed API call (if any).
 const char* Statement::getErrorMsg() const noexcept // nothrow
 {
     return sqlite3_errmsg(mStmtPtr);
 }
 
+// Return a UTF-8 string containing the SQL text of prepared statement with bound parameters expanded.
+std::string Statement::getExtendedSQL() {
+    return sqlite3_expanded_sql(mStmtPtr);
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 // Internal class : shared pointer to the sqlite3_stmt SQLite Statement Object
 ////////////////////////////////////////////////////////////////////////////////