diff --git a/.github/workflows/mariadb-10.10.yml b/.github/workflows/mariadb-10.10.yml
index 303276e..ea3d58b 100644
--- a/.github/workflows/mariadb-10.10.yml
+++ b/.github/workflows/mariadb-10.10.yml
@@ -1,6 +1,6 @@
 name: MariaDB 10.10 Tests
 
-on: push
+on: [push, pull_request]
 
 jobs:
     pdo-mysql:
diff --git a/.github/workflows/mariadb-10.11.yml b/.github/workflows/mariadb-10.11.yml
index c16a3ee..f6b2d8d 100644
--- a/.github/workflows/mariadb-10.11.yml
+++ b/.github/workflows/mariadb-10.11.yml
@@ -1,6 +1,6 @@
 name: MariaDB 10.11 Tests
 
-on: push
+on: [push, pull_request]
 
 jobs:
     pdo-mysql:
diff --git a/.github/workflows/mariadb-10.5.yml b/.github/workflows/mariadb-10.5.yml
index 5406426..a8e5e6d 100644
--- a/.github/workflows/mariadb-10.5.yml
+++ b/.github/workflows/mariadb-10.5.yml
@@ -1,6 +1,6 @@
 name: MariaDB 10.5 Tests
 
-on: push
+on: [push, pull_request]
 
 jobs:
     pdo-mysql:
diff --git a/.github/workflows/mariadb-10.6.yml b/.github/workflows/mariadb-10.6.yml
index 5c18394..df5ae9c 100644
--- a/.github/workflows/mariadb-10.6.yml
+++ b/.github/workflows/mariadb-10.6.yml
@@ -1,6 +1,6 @@
 name: MariaDB 10.6 Tests
 
-on: push
+on: [push, pull_request]
 
 jobs:
     pdo-mysql:
diff --git a/.github/workflows/mariadb-10.9.yml b/.github/workflows/mariadb-10.9.yml
index ca96e64..f44f527 100644
--- a/.github/workflows/mariadb-10.9.yml
+++ b/.github/workflows/mariadb-10.9.yml
@@ -1,6 +1,6 @@
 name: MariaDB 10.9 Tests
 
-on: push
+on: [push, pull_request]
 
 jobs:
     pdo-mysql:
diff --git a/.github/workflows/mysql-5.5.yml b/.github/workflows/mysql-5.5.yml
index eb3632b..22c901b 100644
--- a/.github/workflows/mysql-5.5.yml
+++ b/.github/workflows/mysql-5.5.yml
@@ -1,6 +1,6 @@
 name: MySQL 5.5 Tests
 
-on: push
+on: [push, pull_request]
 
 jobs:
     pdo-mysql:
diff --git a/.github/workflows/mysql-5.6.yml b/.github/workflows/mysql-5.6.yml
index 903a6a4..efbeabf 100644
--- a/.github/workflows/mysql-5.6.yml
+++ b/.github/workflows/mysql-5.6.yml
@@ -1,6 +1,6 @@
 name: MySQL 5.6 Tests
 
-on: push
+on: [push, pull_request]
 
 jobs:
     pdo-mysql:
diff --git a/.github/workflows/mysql-5.7.yml b/.github/workflows/mysql-5.7.yml
index be4d324..cf009c2 100644
--- a/.github/workflows/mysql-5.7.yml
+++ b/.github/workflows/mysql-5.7.yml
@@ -1,6 +1,6 @@
 name: MySQL 5.7 Tests
 
-on: push
+on: [push, pull_request]
 
 jobs:
     pdo-mysql:
diff --git a/.github/workflows/mysql-8.0.yml b/.github/workflows/mysql-8.0.yml
index 556708b..aa2669d 100644
--- a/.github/workflows/mysql-8.0.yml
+++ b/.github/workflows/mysql-8.0.yml
@@ -1,6 +1,6 @@
 name: MySQL 8.0 Tests
 
-on: push
+on: [push, pull_request]
 
 jobs:
     pdo-mysql:
diff --git a/.github/workflows/mysql-8.1.yml b/.github/workflows/mysql-8.1.yml
index c4ad52c..2845cd6 100644
--- a/.github/workflows/mysql-8.1.yml
+++ b/.github/workflows/mysql-8.1.yml
@@ -1,6 +1,6 @@
 name: MySQL 8.1 Tests
 
-on: push
+on: [push, pull_request]
 
 jobs:
     pdo-mysql:
diff --git a/store/ARC2_StoreLoadQueryHandler.php b/store/ARC2_StoreLoadQueryHandler.php
index edf52d8..e25fb8b 100644
--- a/store/ARC2_StoreLoadQueryHandler.php
+++ b/store/ARC2_StoreLoadQueryHandler.php
@@ -464,7 +464,7 @@ public function bufferGraphSQL($g2t)
 
     public function bufferIDSQL($tbl, $id, $val, $val_type)
     {
-        $tbl = $tbl.'2val';
+        $tbl .= '2val';
         if ('id2val' == $tbl) {
             $cols = 'id, val, val_type';
             $vals = '('.$id.", '".$this->store->a['db_object']->escape($val)."', ".$val_type.')';