diff --git a/application/Espo/Resources/metadata/app/complexExpression.json b/application/Espo/Resources/metadata/app/complexExpression.json
index b61d20aa63..e5b1009b59 100644
--- a/application/Espo/Resources/metadata/app/complexExpression.json
+++ b/application/Espo/Resources/metadata/app/complexExpression.json
@@ -157,6 +157,41 @@
             "insertText": "UNIX_TIMESTAMP:(DATE_VALUE)",
             "returnType": "int"
         },
+        {
+            "name": "TIMESTAMPDIFF_YEAR",
+            "insertText": "TIMESTAMPDIFF_YEAR:(DATE_FROM, DATE_TO)",
+            "returnType": "int"
+        },
+        {
+            "name": "TIMESTAMPDIFF_MONTH",
+            "insertText": "TIMESTAMPDIFF_MONTH:(DATE_FROM, DATE_TO)",
+            "returnType": "int"
+        },
+        {
+            "name": "TIMESTAMPDIFF_WEEK",
+            "insertText": "TIMESTAMPDIFF_WEEK:(DATE_FROM, DATE_TO)",
+            "returnType": "int"
+        },
+        {
+            "name": "TIMESTAMPDIFF_DAY",
+            "insertText": "TIMESTAMPDIFF_DAY:(DATE_FROM, DATE_TO)",
+            "returnType": "int"
+        },
+        {
+            "name": "TIMESTAMPDIFF_HOUR",
+            "insertText": "TIMESTAMPDIFF_HOUR:(DATE_FROM, DATE_TO)",
+            "returnType": "int"
+        },
+        {
+            "name": "TIMESTAMPDIFF_MINUTE",
+            "insertText": "TIMESTAMPDIFF_MINUTE:(DATE_FROM, DATE_TO)",
+            "returnType": "int"
+        },
+        {
+            "name": "TIMESTAMPDIFF_SECOND",
+            "insertText": "TIMESTAMPDIFF_SECOND:(DATE_FROM, DATE_TO)",
+            "returnType": "int"
+        },
         {
             "name": "CONCAT",
             "insertText": "CONCAT:(STRING1, STRING2)",