diff --git a/system/Database/Postgre/Connection.php b/system/Database/Postgre/Connection.php
index a152b90aa539..6f6233d14b74 100644
--- a/system/Database/Postgre/Connection.php
+++ b/system/Database/Postgre/Connection.php
@@ -207,7 +207,13 @@ public function getVersion(): string
     protected function execute(string $sql)
     {
         try {
-            return pg_query($this->connID, $sql);
+            $result = pg_query($this->connID, $sql);
+
+            if ($result === false && $this->DBDebug) {
+                throw new DatabaseException(pg_last_error($this->connID));
+            }
+
+            return $result;
         } catch (ErrorException $e) {
             $trace = array_slice($e->getTrace(), 2); // remove the call to error handler
 
diff --git a/tests/system/Database/Live/BadQueryTest.php b/tests/system/Database/Live/BadQueryTest.php
index 8b842b21b930..587cabc3bdec 100644
--- a/tests/system/Database/Live/BadQueryTest.php
+++ b/tests/system/Database/Live/BadQueryTest.php
@@ -53,4 +53,22 @@ public function testBadQueryDebugFalse(): void
 
         $this->enableDBDebug();
     }
+
+    public function testPostgreBadQueryDebugTrueWithWarningsDisabled(): void
+    {
+        if ($this->db->DBDriver !== 'Postgre') {
+            $this->markTestSkipped('This test is only for Postgre.');
+        }
+
+        $this->enableDBDebug();
+        $errorReporting = error_reporting(E_ALL & ~E_WARNING);
+
+        try {
+            $this->expectException(DatabaseException::class);
+            $this->expectExceptionMessage('table_does_not_exist');
+            $this->db->query('SELECT * FROM table_does_not_exist');
+        } finally {
+            error_reporting($errorReporting);
+        }
+    }
 }
diff --git a/user_guide_src/source/changelogs/v4.7.5.rst b/user_guide_src/source/changelogs/v4.7.5.rst
index 5fc0cfce5578..34f3257c5d7a 100644
--- a/user_guide_src/source/changelogs/v4.7.5.rst
+++ b/user_guide_src/source/changelogs/v4.7.5.rst
@@ -53,6 +53,7 @@ Bugs Fixed
 - **Cookie:** Fixed a bug where ``Cookie`` instances created with ``raw: true`` allowed invalid characters in cookie values rejected by ``setrawcookie()``.
 - **Cookie:** Fixed a bug where ``Cookie`` instances allowed invalid characters in path, domain, and prefix attributes rejected by ``setcookie()`` and ``setrawcookie()``.
 - **Database:** Fixed a bug where rebuilding a SQLite3 table (e.g., ``Forge::dropColumn()``, ``Forge::modifyColumn()``, ``Forge::dropForeignKey()`` and ``Forge::dropPrimaryKey()``) corrupted the table names referenced by its foreign keys when ``DBPrefix`` was set.
+- **Database:** Fixed a bug where Postgre query failures were silently ignored when ``DBDebug`` was enabled and PHP warnings were disabled. A ``DatabaseException`` is now thrown.
 - **Debug:** Fixed a bug where ``Timer::start()`` treated ``0.0`` as an empty value and substituted the current time.
 - **Files:** Fixed a bug where ``File::move()`` and ``UploadedFile::move()`` set executable and overly permissive file permissions (``0777 & ~umask()`` instead of ``0666 & ~umask()``), and ``UploadedFile::move()`` targeted the parent directory instead of the destination file for ``chmod()``.
 - **Helpers:** Fixed a bug where ``get_dir_file_info()`` returned incomplete entries for subdirectories and missing files instead of omitting them.