feat: trigger on config_changes update

views/030_config_changes.sql

@@ -0,0 +1,68 @@
+CREATE
+OR REPLACE FUNCTION config_changes_update_trigger() RETURNS TRIGGER AS $$
+DECLARE 
+  count_increment INT;
+BEGIN
+  count_increment := NEW.count - OLD.count;
+
+  UPDATE
+    config_changes
+  SET
+    change_type = NEW.change_type,
+    count = CASE
+      WHEN NEW.details IS DISTINCT FROM OLD.details THEN NEW.count
+      ELSE count
+    END,
+    created_at = NOW(),
+    created_by = NEW.created_by,
+    details = NEW.details,
+    diff = NEW.diff,
+    external_created_by = NEW.external_created_by,
+    external_change_id = NEW.external_change_id,
+    first_observed = LEAST(first_observed, created_at),
+    patches = NEW.patches,
+    severity = NEW.severity,
+    source = NEW.source,
+    summary = NEW.summary
+  WHERE
+    id = NEW.id;
+
+  -- Prevent the original update by returning NULL
+  RETURN NULL;
+EXCEPTION
+  WHEN unique_violation THEN
+    IF sqlerrm LIKE '%config_changes_config_id_external_change_id_key%' THEN
+      UPDATE config_changes
+      SET
+        change_type = NEW.change_type,
+        count = CASE
+          WHEN NEW.details IS DISTINCT FROM OLD.details THEN config_changes.count + count_increment
+          ELSE count
+        END,
+        created_at = NOW(),
+        created_by = NEW.created_by,
+        details = NEW.details,
+        diff = NEW.diff,
+        external_created_by = NEW.external_created_by,
+        first_observed = LEAST(first_observed, created_at),
+        patches = NEW.patches,
+        severity = NEW.severity,
+        source = NEW.source,
+        summary = NEW.summary
+      WHERE 
+        external_change_id = NEW.external_change_id;
+
+      RETURN NULL;
+    ELSE
+      RAISE;
+    END IF;
+  WHEN OTHERS THEN
+    RAISE;
+END;
+$$ LANGUAGE plpgsql;
+
+CREATE
+OR REPLACE TRIGGER config_changes_update_trigger BEFORE
+UPDATE
+  ON config_changes FOR EACH ROW
+  WHEN (pg_trigger_depth() = 0) EXECUTE FUNCTION config_changes_update_trigger();