Make sure the statement is reset after a in step. Fixes #10

src/esqlite3.erl

@@ -27,6 +27,7 @@
          insert/2,
          prepare/2, prepare/3,
          step/1, step/2, 
+         reset/1, 
          bind/2, bind/3, 
          fetchone/1,
          fetchall/1,
@@ -270,6 +271,14 @@ step(Stmt, Timeout) ->
     ok = esqlite3_nif:step(Stmt, Ref, self()),
     receive_answer(Ref, Timeout).
 
+%% @doc Reset the prepared statement back to its initial state.
+%%
+%% @spec reset(prepared_statement()) -> ok | {error, error_message()}
+reset(Stmt) ->
+    Ref = make_ref(),
+    ok = esqlite3_nif:reset(Stmt, Ref, self()),
+    receive_answer(Ref, ?DEFAULT_TIMEOUT).
+
 %% @doc Bind values to prepared statements
 %%
 %% @spec bind(prepared_statement(), value_list()) -> ok | {error, error_message()}

src/esqlite3_nif.erl

@@ -3,7 +3,7 @@
 
 %% @doc Low level erlang API for sqlite3 databases
 
-%% Copyright 2011, 2012, 2013 Maas-Maarten Zeeman
+%% Copyright 2011, 2012, 2013, 2014 Maas-Maarten Zeeman
 %%
 %% Licensed under the Apache License, Version 2.0 (the "License");
 %% you may not use this file except in compliance with the License.
@@ -28,6 +28,7 @@
     insert/4,
     prepare/4,
     step/3,
+    reset/3,
     finalize/3,
     bind/4,
     column_names/3,
@@ -91,6 +92,12 @@ prepare(_Db, _Ref, _Dest, _Sql) ->
 step(_Stmt, _Ref, _Dest) ->
     exit(nif_library_not_loaded).
 
+%% @doc
+%%
+%% @spec reset(statement(), reference(), pid()) -> ok | {error, message()}
+reset(_Stmt, _Ref, _Dest) ->
+    exit(nif_library_not_loaded).
+
 %% @doc
 %%
 %%