Avoid an exception on GreenPlum when retrieving RE-SQL on a table. Fixes #3409

docs/en_US/release_notes_3_1.rst

@@ -35,3 +35,4 @@ Bug fixes
 | `Bug #3342 <https://redmine.postgresql.org/issues/3342>`_ - Set SESSION_COOKIE_SAMESITE='Lax' per Flask recommendation to prevents sending cookies with CSRF-prone requests from external sites, such as submitting a form
 | `Bug #3353 <https://redmine.postgresql.org/issues/3353>`_ - Handle errors properly if they occur when renaming a database
 | `Bug #3392 <https://redmine.postgresql.org/issues/3392>`_ - Fix IPv6 support in the container build.
+| `Bug #3409 <https://redmine.postgresql.org/issues/3409>`_ - Avoid an exception on GreenPlum when retrieving RE-SQL on a table.

web/pgadmin/browser/server_groups/servers/databases/schemas/tables/templates/trigger/sql/9.1_plus/properties.sql

@@ -0,0 +1,23 @@
+SELECT t.oid,t.tgname AS name, t.xmin, t.*, relname, CASE WHEN relkind = 'r' THEN TRUE ELSE FALSE END AS parentistable,
+    nspname, des.description, l.lanname, p.prosrc, p.proname AS tfunction,
+    COALESCE(substring(pg_get_triggerdef(t.oid), 'WHEN (.*) EXECUTE PROCEDURE'),
+    substring(pg_get_triggerdef(t.oid), 'WHEN (.*)  \\$trigger')) AS whenclause,
+    -- We need to convert tgargs column bytea datatype to array datatype
+    (string_to_array(encode(tgargs, 'escape'), E'\\000')::text[])[1:tgnargs] AS custom_tgargs,
+{% if datlastsysoid %}
+    (CASE WHEN t.oid <= {{ datlastsysoid}}::oid THEN true ElSE false END) AS is_sys_trigger,
+{% endif %}
+    (CASE WHEN tgconstraint != 0::OID THEN true ElSE false END) AS is_constraint_trigger,
+    (CASE WHEN tgenabled = 'O' THEN true ElSE false END) AS is_enable_trigger
+FROM pg_trigger t
+    JOIN pg_class cl ON cl.oid=tgrelid
+    JOIN pg_namespace na ON na.oid=relnamespace
+    LEFT OUTER JOIN pg_description des ON (des.objoid=t.oid AND des.classoid='pg_trigger'::regclass)
+    LEFT OUTER JOIN pg_proc p ON p.oid=t.tgfoid
+    LEFT OUTER JOIN pg_language l ON l.oid=p.prolang
+WHERE NOT tgisinternal
+    AND tgrelid = {{tid}}::OID
+{% if trid %}
+    AND t.oid = {{trid}}::OID
+{% endif %}
+ORDER BY tgname;

web/pgadmin/browser/server_groups/servers/databases/schemas/tables/templates/trigger/sql/default/properties.sql

@@ -1,23 +1 @@
-SELECT t.oid,t.tgname AS name, t.xmin, t.*, relname, CASE WHEN relkind = 'r' THEN TRUE ELSE FALSE END AS parentistable,
-    nspname, des.description, l.lanname, p.prosrc, p.proname AS tfunction,
-    COALESCE(substring(pg_get_triggerdef(t.oid), 'WHEN (.*) EXECUTE PROCEDURE'),
-    substring(pg_get_triggerdef(t.oid), 'WHEN (.*)  \\$trigger')) AS whenclause,
-    -- We need to convert tgargs column bytea datatype to array datatype
-    (string_to_array(encode(tgargs, 'escape'), E'\\000')::text[])[1:tgnargs] AS custom_tgargs,
-{% if datlastsysoid %}
-    (CASE WHEN t.oid <= {{ datlastsysoid}}::oid THEN true ElSE false END) AS is_sys_trigger,
-{% endif %}
-    (CASE WHEN tgconstraint != 0::OID THEN true ElSE false END) AS is_constraint_trigger,
-    (CASE WHEN tgenabled = 'O' THEN true ElSE false END) AS is_enable_trigger
-FROM pg_trigger t
-    JOIN pg_class cl ON cl.oid=tgrelid
-    JOIN pg_namespace na ON na.oid=relnamespace
-    LEFT OUTER JOIN pg_description des ON (des.objoid=t.oid AND des.classoid='pg_trigger'::regclass)
-    LEFT OUTER JOIN pg_proc p ON p.oid=t.tgfoid
-    LEFT OUTER JOIN pg_language l ON l.oid=p.prolang
-WHERE NOT tgisinternal
-    AND tgrelid = {{tid}}::OID
-{% if trid %}
-    AND t.oid = {{trid}}::OID
-{% endif %}
-ORDER BY tgname;
+SELECT 1 WHERE 1 = 2;

web/pgadmin/browser/server_groups/servers/databases/schemas/tables/utils.py

@@ -1003,6 +1003,8 @@ class BaseTableView(PGChildNodeView, BasePartitionTable):
             if not status:
                 return internal_server_error(errormsg=res)
 
+            if len(res['rows']) == 0:
+                continue
             data = dict(res['rows'][0])
             # Adding parent into data dict, will be using it while creating sql
             data['schema'] = schema