Added extra function to return a map with error information

src/esqlite3.erl

@@ -19,7 +19,10 @@
 
 %% higher-level export
 -export([
-    open/1, close/1,
+    open/1,
+    close/1,
+
+    error_info/1,
 
     %% db connection functions
     set_update_hook/2,
@@ -136,6 +139,13 @@ open(Filename) ->
 close(#esqlite3{db=Connection}) ->
     esqlite3_nif:close(Connection).
 
+%% @doc Return a description of the last occurred error. 
+-spec error_info(Connection) -> ErrorMsg 
+    when Connection :: esqlite3(),
+         ErrorMsg :: undefined | binary().
+error_info(#esqlite3{db=Connection}) ->
+    esqlite3_nif:error_info(Connection).
+
 
 %% @doc Subscribe to database notifications. When rows are inserted deleted
 %% or updates, the process will receive messages:

src/esqlite3_nif.erl

@@ -22,6 +22,7 @@
 -export([
     open/1,
     close/1,
+    error_info/1,
 
     set_update_hook/2,
 
@@ -89,6 +90,15 @@ open(_Filename) ->
 close(_Db) ->
     erlang:nif_error(nif_library_not_loaded).
 
+%% @doc Get an error messages for the last occurred error.
+%%
+-spec error_info(Connection) -> ErrorMsg 
+    when Connection :: esqlite3(),
+         ErrorMsg :: map().
+error_info(_Db) ->
+    erlang:nif_error(nif_library_not_loaded).
+
+
 %% @doc Set an update hook
 %%
 -spec set_update_hook(Connection, Pid) -> Result