diff --git a/docs/en_US/release_notes_4_13.rst b/docs/en_US/release_notes_4_13.rst
index 664e5730d..e6e61860c 100644
--- a/docs/en_US/release_notes_4_13.rst
+++ b/docs/en_US/release_notes_4_13.rst
@@ -55,6 +55,7 @@ Bug fixes
 | `Issue #4663 <https://redmine.postgresql.org/issues/4663>`_ -  Fix exception in query history for python 2.7.
 | `Issue #4674 <https://redmine.postgresql.org/issues/4674>`_ -  Fix query tool launch error if user name contain html characters.
 | `Issue #4681 <https://redmine.postgresql.org/issues/4681>`_ -  Increase cache control max age for static files to improve performance over longer run.
+| `Issue #4698 <https://redmine.postgresql.org/issues/4698>`_ -  Fix SQL issue of length and precision when changing the data type of Column.
 | `Issue #4702 <https://redmine.postgresql.org/issues/4702>`_ -  Fix modified SQL for Index when reset the value of Fill factor and Clustered?.
 | `Issue #4703 <https://redmine.postgresql.org/issues/4703>`_ -  Fix reversed engineered SQL for btree Index when provided sort order and NULLs.
 | `Issue #4726 <https://redmine.postgresql.org/issues/4726>`_ -  Ensure sequence with negative value should be created.
diff --git a/web/pgadmin/browser/server_groups/servers/databases/schemas/tables/columns/__init__.py b/web/pgadmin/browser/server_groups/servers/databases/schemas/tables/columns/__init__.py
index cfa653c7c..462d7978f 100644
--- a/web/pgadmin/browser/server_groups/servers/databases/schemas/tables/columns/__init__.py
+++ b/web/pgadmin/browser/server_groups/servers/databases/schemas/tables/columns/__init__.py
@@ -524,10 +524,20 @@ class ColumnsView(PGChildNodeView, DataTypeReader):
         Returns:
             Converted data
         """
-        if 'attlen' in data and data['attlen'] is not None:
+
+        # We need to handle the below case because jquery has changed
+        # undefined/null values to empty strings
+        # https://github.com/jquery/jquery/commit/36d2d9ae937f626d98319ed850905e8d1cbfd078
+        if 'attlen' in data and data['attlen'] == '':
+            data['attlen'] = None
+        elif 'attlen' in data and data['attlen'] is not None:
             data['attlen'] = str(data['attlen'])
-        if 'attprecision' in data and data['attprecision'] is not None:
+
+        if 'attprecision' in data and data['attprecision'] == '':
+            data['attprecision'] = None
+        elif 'attprecision' in data and data['attprecision'] is not None:
             data['attprecision'] = str(data['attprecision'])
+
         return data
 
     @check_precondition
@@ -791,6 +801,18 @@ class ColumnsView(PGChildNodeView, DataTypeReader):
                 old_data['cltype'] = self._cltype_formatter(old_data['cltype'])
                 old_data['hasSqrBracket'] = self.hasSqrBracket
 
+                if 'cltype' in data and data['cltype'] != old_data['cltype']:
+                    length, precision, typeval = \
+                        self.get_length_precision(data['cltype'])
+
+                    # if new datatype does not have length or precision
+                    # then we cannot apply length or precision of old
+                    # datatype to new one.
+                    if not length:
+                        old_data['attlen'] = -1
+                    if not precision:
+                        old_data['attprecision'] = None
+
             # If name is not present in data then
             # we will fetch it from old data, we also need schema & table name
             if 'name' not in data: