diff --git a/index.js b/index.js
index 1f617ee..d4bb9b0 100644
--- a/index.js
+++ b/index.js
@@ -80,6 +80,7 @@ server.get('/get_pool', bodyParser.json(), function(req, res) {
         console.log(new Date().toISOString() + "-------------------------get pool:----------------------------");
         console.log(req.body.quota_rep);
         sql = sql.replace("rep_replace", req.body.quota_rep);
+        console.log(sql);
         Postgres.FirstRow(sql, [], res)
     };
 
@@ -164,6 +165,37 @@ server.get('/list_changes', bodyParser.json(), function(req, res) {
     };
 })
 
+server.get('/undo_change', bodyParser.json(), function(req, res) {
+
+    var sql = "";
+    var w = "";
+    var c = 1;
+    var d = 1;
+    var args = [];
+    var path = './route_sql/undo.sql';
+
+    fs.readFile(path, 'utf8', function(err, data) {
+        if (!err) {
+            callback(data);
+        } else {
+            console.log("fatal error pulling sql file")
+            callback(err);
+        }
+    });
+
+    var callback = function(arg) {
+        sql = arg;
+
+        console.log(new Date().toISOString() + "-------------------------undo change:------------------------------")
+        console.log(req.body);
+        //parse the where clause into the main sql statement
+        sql = sql.replace(new RegExp("replace_id", 'g'), JSON.stringify(req.body.logid))
+            //execute the sql and send the result
+        console.log(sql);
+        Postgres.FirstRow(sql, [], res)
+    };
+})
+
 server.post('/addmonth_v', bodyParser.json(), function(req, res) {
 
     var sql = "";
diff --git a/route_sql/get_pool.sql b/route_sql/get_pool.sql
index 3c9506b..0e68159 100644
--- a/route_sql/get_pool.sql
+++ b/route_sql/get_pool.sql
@@ -29,14 +29,17 @@ SELECT
     ,request_season
     ,request_month
     ,promo
-    ,version
-    ,iter
     --------values-------------------------
     ,sum(value_loc) value_loc
     ,sum(value_usd) value_usd
     ,sum(cost_loc) cost_loc
     ,sum(cost_usd) cost_usd
     ,sum(units) units
+    ,version
+    ,iter
+    ,logid
+    ,comment
+    ,module
 FROM
     rlarp.osm_pool
 WHERE
@@ -73,6 +76,9 @@ GROUP BY
     ,promo
     ,version
     ,iter
+    ,logid
+    ,comment
+    ,module
 )
 SELECT
     json_agg(row_to_json(rows)) x
diff --git a/route_sql/undo.sql b/route_sql/undo.sql
new file mode 100644
index 0000000..2c2b100
--- /dev/null
+++ b/route_sql/undo.sql
@@ -0,0 +1,5 @@
+WITH
+d AS (
+DELETE FROM rlarp.osm_log WHERE id = replace_id RETURNING id
+)
+SELECT json_agg(row_to_json(d)) x from d
\ No newline at end of file