fix(sqleditor): skip read-only columns when saving inserted rows (#10015)

docs/en_US/release_notes_9_16.rst

@@ -35,3 +35,4 @@ Bug fixes
   | `Issue #9896 <https://github.com/pgadmin-org/pgadmin4/issues/9896>`_ -  Fix invalid DDL reconstruction for SERIAL columns in Schema Diff and the generated SQL/CREATE Script so the output round-trips on a clean target.
   | `Issue #9935 <https://github.com/pgadmin-org/pgadmin4/issues/9935>`_ -  Fix "Illegal instruction" crash on startup of the Linux DEB and RPM packages on older x86_64 CPUs by pinning the psycopg C extension build to the x86-64 baseline.
   | `Issue #9936 <https://github.com/pgadmin-org/pgadmin4/issues/9936>`_ -  Fix the AI panel silently falling back to the default provider when a custom LLM API URL or key file was set, and allow self-hosted LLM endpoints on any loopback port.
+  | `Issue #9939 <https://github.com/pgadmin-org/pgadmin4/issues/9939>`_ -  Fix saving a newly-added row in the Query Tool failing when the result set includes expression or alias columns that are not real columns of the underlying table.

web/pgadmin/tools/sqleditor/static/js/components/sections/ResultSet.jsx

@@ -1257,8 +1257,17 @@ export function ResultSet() {
     try {
       /* Convert the added info to actual rows */
       let added = {...dataChangeStore.added};
+      /* Strip read-only columns (expression/alias columns in Query Tool)
+       * from the new-row payload so the backend doesn't try to INSERT
+       * them into the base table. Issue #9939. */
+      let nonEditableKeys = new Set(
+        columns.filter((c)=>c.can_edit === false).map((c)=>c.key)
+      );
       Object.keys(added).forEach((clientPK)=>{
-        added[clientPK].data = _.find(rows, (r)=>rowKeyGetter(r)==clientPK);
+        let rowData = _.find(rows, (r)=>rowKeyGetter(r)==clientPK);
+        added[clientPK].data = _.omitBy(
+          rowData, (_v, k)=>nonEditableKeys.has(k)
+        );
       });
       let {data: respData} = await rsu.current.saveData({
         updated: dataChangeStore.updated,

web/pgadmin/tools/sqleditor/utils/get_column_types.py

@@ -50,6 +50,11 @@ def get_columns_types(is_query_tool, columns_info, table_oid, conn, has_oids,
         col_type['type_name'] = None
         col_type['internal_size'] = col['internal_size']
         col_type['display_size'] = col['display_size']
+        # Propagate per-column editability so the save path can refuse to
+        # write expression/alias columns that don't exist in the base table.
+        # View Data Tool columns are always real table columns: default True.
+        col_type['is_editable'] = col.get('is_editable', True) \
+            if is_query_tool else True
         column_types[col['name']] = col_type
 
         if rset['rows']:

web/pgadmin/tools/sqleditor/utils/save_changed_data.py

@@ -118,6 +118,18 @@ def save_changed_data(changed_data, columns_info, conn, command_obj,
                 if command_obj.has_oids():
                     data.pop('oid', None)
 
+                # Drop any column the client included that isn't a real
+                # editable column of the underlying table (e.g.
+                # `first_name || ' ' || last_name as the_name`). Keys not
+                # known to the result set are dropped too. Without this
+                # guard the rendered INSERT references a non-existent
+                # column and Postgres rejects the row. Issue #9939.
+                data = {
+                    k: v for k, v in data.items()
+                    if k in columns_info and
+                    columns_info[k].get('is_editable', True)
+                }
+
                 # Update columns value with columns having
                 # not_null=False and has no default value
                 column_data.update(data)

web/pgadmin/tools/sqleditor/utils/tests/test_save_changed_data.py

@@ -960,3 +960,83 @@ class TestSaveChangedData(BaseTestGenerator):
         url = '/sqleditor/close/{0}'.format(self.trans_id)
         response = self.tester.delete(url)
         self.assertEqual(response.status_code, 200)
+
+
+class TestSaveAddedRowSkipsNonEditableColumn(TestSaveChangedData):
+    """Regression test for issue #9939.
+
+    When a Query Tool result includes an expression or alias column
+    (e.g. ``first_name || ' ' || last_name AS the_name``), the alias is
+    not a real column of the underlying table. The new-row save flow
+    must drop those keys before rendering INSERT; otherwise PostgreSQL
+    rejects the row with ``column "the_name" does not exist``.
+    """
+
+    scenarios = [
+        ('Insert via SELECT that aliases a concatenation', dict(
+            save_payload={
+                "updated": {},
+                "added": {
+                    "2": {
+                        "err": False,
+                        "data": {
+                            "id": "1",
+                            "__temp_PK": "2",
+                            "first_name": "John",
+                            "last_name": "Doe",
+                            # The client populates every column when
+                            # building a new row. ``the_name`` is the
+                            # aliased expression — sending it must not
+                            # break the INSERT.
+                            "the_name": None
+                        }
+                    }
+                },
+                "staged_rows": {},
+                "deleted": {},
+                "updated_index": {},
+                "added_index": {"2": "2"},
+                "columns": [
+                    {"name": "id", "pos": 0, "can_edit": True,
+                     "type": "integer", "cell": "number",
+                     "not_null": True, "has_default_val": False,
+                     "is_array": False, "display_name": "id"},
+                    {"name": "first_name", "pos": 1, "can_edit": True,
+                     "type": "text", "cell": "string",
+                     "not_null": False, "has_default_val": False,
+                     "is_array": False, "display_name": "first_name"},
+                    {"name": "last_name", "pos": 2, "can_edit": True,
+                     "type": "text", "cell": "string",
+                     "not_null": False, "has_default_val": False,
+                     "is_array": False, "display_name": "last_name"},
+                    {"name": "the_name", "pos": 3, "can_edit": False,
+                     "type": "text", "cell": "string",
+                     "not_null": False, "has_default_val": False,
+                     "is_array": False, "display_name": "the_name"},
+                ]
+            },
+            save_status=True,
+            check_sql='SELECT id, first_name, last_name '
+                      'FROM %s WHERE id = 1',
+            check_result=[[1, "John", "Doe"]]
+        )),
+    ]
+
+    def _create_test_table(self):
+        self.test_table_name = "test_for_save_data_alias_" + \
+                               str(secrets.choice(range(1000, 9999)))
+        create_sql = """
+            DROP TABLE IF EXISTS "{0}";
+
+            CREATE TABLE "{0}"(
+                id INT PRIMARY KEY,
+                first_name TEXT,
+                last_name TEXT
+            );
+        """.format(self.test_table_name)
+        self.select_sql = (
+            "SELECT id, first_name, last_name, "
+            "first_name || ' ' || last_name AS the_name "
+            "FROM {0};"
+        ).format(self.test_table_name)
+        utils.create_table_with_query(self.server, self.db_name, create_sql)