diff --git a/framework/CHANGELOG.md b/framework/CHANGELOG.md
index 3b3aade3dc..28d049479c 100644
--- a/framework/CHANGELOG.md
+++ b/framework/CHANGELOG.md
@@ -18,6 +18,7 @@ Yii Framework 2 Change Log
 - Bug #19322: Revert force setting value to empty string in case it's `null` in `yii\validators\FilterValidator::validateAttribute()` (bizley)
 - Bug #19329: Fix `yii\web\GroupUrlRule` to properly normalize prefix (bizley)
 - Bug #19328: Passing null to parameter #1 ($string) of type string is deprecated in `yii\db\oci\Schema` (Arkeins)
+- Bug #19237: Fix OCI PHP 8.1 passing `null` to trim() (longthanhtran)
 
 
 2.0.45 February 11, 2022
diff --git a/framework/db/oci/Schema.php b/framework/db/oci/Schema.php
index db2bf36f2f..f6866e09cc 100644
--- a/framework/db/oci/Schema.php
+++ b/framework/db/oci/Schema.php
@@ -414,7 +414,7 @@ SQL;
             if (stripos((string) $column['DATA_DEFAULT'], 'timestamp') !== false) {
                 $c->defaultValue = null;
             } else {
-                $defaultValue = $column['DATA_DEFAULT'];
+                $defaultValue = (string) $column['DATA_DEFAULT'];
                 if ($c->type === 'timestamp' && $defaultValue === 'CURRENT_TIMESTAMP') {
                     $c->defaultValue = new Expression('CURRENT_TIMESTAMP');
                 } else {