fix: PostgreSQL Builder's increment() and decrement() methods not working for numeric columns

system/Database/Postgre/Builder.php

@@ -97,7 +97,7 @@ public function increment(string $column, int $value = 1)
     {
         $column = $this->db->protectIdentifiers($column);
 
-        $sql = $this->_update($this->QBFrom[0], [$column => "to_number({$column}, '9999999') + {$value}"]);
+        $sql = $this->_update($this->QBFrom[0], [$column => "CAST({$column} AS numeric) + {$value}"]);
 
         if (! $this->testMode) {
             $this->resetWrite();
@@ -119,7 +119,7 @@ public function decrement(string $column, int $value = 1)
     {
         $column = $this->db->protectIdentifiers($column);
 
-        $sql = $this->_update($this->QBFrom[0], [$column => "to_number({$column}, '9999999') - {$value}"]);
+        $sql = $this->_update($this->QBFrom[0], [$column => "CAST({$column} AS numeric) - {$value}"]);
 
         if (! $this->testMode) {
             $this->resetWrite();

tests/system/Database/Live/IncrementTest.php

@@ -51,6 +51,28 @@ public function testIncrementWithValue(): void
         $this->seeInDatabase('job', ['name' => 'incremental', 'description' => '8']);
     }
 
+    public function testIncrementWithNumericColumns(): void
+    {
+        $this->hasInDatabase('job', ['name' => 'incremental', 'created_at' => 6]);
+
+        $this->db->table('job')
+            ->where('name', 'incremental')
+            ->increment('created_at');
+
+        $this->seeInDatabase('job', ['name' => 'incremental', 'created_at' => 7]);
+    }
+
+    public function testIncrementWithNumericColumnsAndValue(): void
+    {
+        $this->hasInDatabase('job', ['name' => 'incremental', 'created_at' => 6]);
+
+        $this->db->table('job')
+            ->where('name', 'incremental')
+            ->increment('created_at', 2);
+
+        $this->seeInDatabase('job', ['name' => 'incremental', 'created_at' => 8]);
+    }
+
     public function testResetStateAfterIncrement(): void
     {
         $this->hasInDatabase('job', ['name' => 'account1', 'description' => '10']);
@@ -87,6 +109,28 @@ public function testDecrementWithValue(): void
         $this->seeInDatabase('job', ['name' => 'incremental', 'description' => '4']);
     }
 
+    public function testDecrementWithNumericColumns(): void
+    {
+        $this->hasInDatabase('job', ['name' => 'incremental', 'created_at' => 6]);
+
+        $this->db->table('job')
+            ->where('name', 'incremental')
+            ->decrement('created_at');
+
+        $this->seeInDatabase('job', ['name' => 'incremental', 'created_at' => 5]);
+    }
+
+    public function testDecrementWithNumericColumnsAndValue(): void
+    {
+        $this->hasInDatabase('job', ['name' => 'incremental', 'created_at' => 6]);
+
+        $this->db->table('job')
+            ->where('name', 'incremental')
+            ->decrement('created_at', 2);
+
+        $this->seeInDatabase('job', ['name' => 'incremental', 'created_at' => 4]);
+    }
+
     public function testResetStateAfterDecrement(): void
     {
         $this->hasInDatabase('job', ['name' => 'account1', 'description' => '10']);

user_guide_src/source/changelogs/v4.7.3.rst

@@ -41,6 +41,7 @@ Bugs Fixed
 - **Commands:** Fixed a bug in the ``env`` command where passing options only would cause the command to throw a ``TypeError`` instead of showing the current environment.
 - **Common:** Fixed a bug where the ``command()`` helper function did not properly clean up output buffers, which could lead to risky tests when exceptions were thrown.
 - **Database:** Fixed a bug where the SQLSRV driver's decrement method was adding instead of subtracting the decrement value when ``$castTextToInt`` was false.
+- **Database:** Fixed a bug where the PostgreSQL driver's ``increment()`` and ``decrement()`` methods were not working for numeric columns.
 - **Kint:** Fixed a bug where stale Content Security Policy nonces were reused in worker mode, causing browser CSP violations for Debug Toolbar assets.
 - **Time:** Fixed a bug where ``Time::createFromTimestamp()`` could fail for microsecond timestamps when ``LC_NUMERIC`` used a comma decimal separator.
 - **Validation:** Fixed a bug where ``Validation::getValidated()`` dropped fields whose validated value was explicitly ``null``.