diff --git a/anydb-sql.js b/anydb-sql.js
index 7172edb..af1e178 100644
--- a/anydb-sql.js
+++ b/anydb-sql.js
@@ -212,6 +212,8 @@ module.exports = function (opt) {
         var name = c.alias || c.name;
         if (c.primaryKey && !c.aggregator)
             name = name + '##';
+        else if (c.dataType == 'json')
+            name = name + "##json";
         return name;
     }
 
diff --git a/lib/grouper.js b/lib/grouper.js
index a77d31c..a60b2c5 100644
--- a/lib/grouper.js
+++ b/lib/grouper.js
@@ -119,8 +119,10 @@ function clean(val, cleaner) {
         var key = keys[k];
         var newkey = key.replace(cleaner, '');
         var item = val[key];
-        if (/{}$/.test(key) && item instanceof Array) {
-            console.log(key, "is same with", newkey);
+
+        if (/##json$/.test(key))
+            newkey = key.replace('##json', '');
+        else if (/{}$/.test(key) && item instanceof Array) {
             item = clean(item[0], cleaner);
         }
         else if (item instanceof Array || isObject(item))
@@ -168,22 +170,14 @@ function removeDepth(rows) {
 }
 
 function isGroup(val, key) {
-    return isObject(val);
+    return isObject(val) && !(/##json$/).test(key);
 }
 
 function isKey(val, key) {
     return (/##$/).test(key);
 }
 
-function isGroup(val, key) {
-    return isObject(val);
-}
-
-function isKey(val, key) {
-    return (/##$/).test(key);
-}
-
-var cleanRegex = /(\[\]|##|\{\})$/;
+var cleanRegex = /(\[\]|##|\{\}|##json)$/;
 
 
 function checkKeys(row, reg) {
@@ -261,7 +255,7 @@ function normalizerSegment(obj, base) {
         var key = keys[k];
         var item = obj[key];
         var accessor = base ? base + '.' + key : key;
-        if (!isObject(item)) {
+        if (!isObject(item) || /##json$/.test(key)) {
             arr.push('"' + key + '": row["' + accessor + '"]');
         } else {
             arr.push('"' + key + '":' + normalizerSegment(item, accessor));
diff --git a/test/grouper.js b/test/grouper.js
index 7559c14..96d5b2a 100644
--- a/test/grouper.js
+++ b/test/grouper.js
@@ -20,7 +20,7 @@ var grouperData = require('./lib/grouper-data');
 
 
 function groupTest(val, key) {
-    return grouper.isObject(val);
+    return grouper.isObject(val) && !(/##json$/).test(key);
     //return grouper.isObject(val) && !/\!\!$/.test(key);
 }
 
@@ -34,7 +34,7 @@ var group = grouper.group, clean = grouper.clean;
 function grouperTest(desc, inData, outData) {
     t.test(desc, function(t) {
         var grouped = group(inData, groupTest, eqTest);
-        var ungrouped = clean(grouped, /(\[\]|##|\{\})$/);
+        var ungrouped = clean(grouped, /(\[\]|##|\{\}|##json)$/);
         //console.log(util.inspect(ungrouped, false, 5));
         t.deepEquals(ungrouped, outData);
         t.end();
@@ -49,12 +49,14 @@ grouperTest("deep but no nesting of non-groups",
 
 
 var nested = [
-    {'id##': 1, metadata: [{a: 1}, {a: 2}]},
-    {'id##': 2, metadata: [{b: 5}, {b: 8}]}
+    {'id##': 1, 'metadata##json': [{a: 1}, {a: 2}]},
+    {'id##': 2, 'metadata##json': [{b: 5}, {b: 8}]},
+    {'id##': 3, 'metadata##json': [{b: 8}, {b: 7,c:[1,2,3]}]}
 ];
 var nestedOut = [
     {'id': 1, metadata: [{a: 1}, {a: 2}]},
-    {'id': 2, metadata: [{b: 5}, {b: 8}]}
+    {'id': 2, metadata: [{b: 5}, {b: 8}]},
+    {'id': 3, metadata: [{b: 8}, {b: 7,c:[1,2,3]}]}
 ];