Let workflows run for pull requests as well (#153)

* let workflows run for pull requests as well

* fixed coding style issue

.github/workflows/mariadb-10.10.yml

@@ -1,6 +1,6 @@
 name: MariaDB 10.10 Tests
 
-on: push
+on: [push, pull_request]
 
 jobs:
     pdo-mysql:

.github/workflows/mariadb-10.11.yml

@@ -1,6 +1,6 @@
 name: MariaDB 10.11 Tests
 
-on: push
+on: [push, pull_request]
 
 jobs:
     pdo-mysql:

.github/workflows/mariadb-10.5.yml

@@ -1,6 +1,6 @@
 name: MariaDB 10.5 Tests
 
-on: push
+on: [push, pull_request]
 
 jobs:
     pdo-mysql:

.github/workflows/mariadb-10.6.yml

@@ -1,6 +1,6 @@
 name: MariaDB 10.6 Tests
 
-on: push
+on: [push, pull_request]
 
 jobs:
     pdo-mysql:

.github/workflows/mariadb-10.9.yml

@@ -1,6 +1,6 @@
 name: MariaDB 10.9 Tests
 
-on: push
+on: [push, pull_request]
 
 jobs:
     pdo-mysql:

.github/workflows/mysql-5.5.yml

@@ -1,6 +1,6 @@
 name: MySQL 5.5 Tests
 
-on: push
+on: [push, pull_request]
 
 jobs:
     pdo-mysql:

.github/workflows/mysql-5.6.yml

@@ -1,6 +1,6 @@
 name: MySQL 5.6 Tests
 
-on: push
+on: [push, pull_request]
 
 jobs:
     pdo-mysql:

.github/workflows/mysql-5.7.yml

@@ -1,6 +1,6 @@
 name: MySQL 5.7 Tests
 
-on: push
+on: [push, pull_request]
 
 jobs:
     pdo-mysql:

.github/workflows/mysql-8.0.yml

@@ -1,6 +1,6 @@
 name: MySQL 8.0 Tests
 
-on: push
+on: [push, pull_request]
 
 jobs:
     pdo-mysql:

.github/workflows/mysql-8.1.yml

@@ -1,6 +1,6 @@
 name: MySQL 8.1 Tests
 
-on: push
+on: [push, pull_request]
 
 jobs:
     pdo-mysql:

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.')';