diff --git a/src/Dacapo/Domain/ValueObject/Schema/ColumnType/BaseFloatType.php b/src/Dacapo/Domain/ValueObject/Schema/ColumnType/BaseFloatType.php
index a4f4427e..3fe13fcd 100644
--- a/src/Dacapo/Domain/ValueObject/Schema/ColumnType/BaseFloatType.php
+++ b/src/Dacapo/Domain/ValueObject/Schema/ColumnType/BaseFloatType.php
@@ -16,11 +16,9 @@ public function __construct($args = null)
             $args = explode(',', $args);
         }
 
-        if (is_array($args) && count($args) === 2) {
-            $this->total = (int) $args[0];
-            $this->places = (int) $args[1];
-        } elseif (is_array($args) && count($args) === 1) {
-            $this->total = (int) $args[0];
+        if (is_array($args)) {
+            $this->total = isset($args[0]) ? (int) $args[0] : null;
+            $this->places = isset($args[1]) ? (int) $args[1] : null;
         } elseif (is_int($args)) {
             $this->total = $args;
         }
diff --git a/src/Dacapo/Domain/ValueObject/Schema/ColumnType/BaseIntegerType.php b/src/Dacapo/Domain/ValueObject/Schema/ColumnType/BaseIntegerType.php
index 6ad57dac..870f6a90 100644
--- a/src/Dacapo/Domain/ValueObject/Schema/ColumnType/BaseIntegerType.php
+++ b/src/Dacapo/Domain/ValueObject/Schema/ColumnType/BaseIntegerType.php
@@ -12,12 +12,9 @@ abstract class BaseIntegerType implements ColumnType
 
     public function __construct($args = null)
     {
-        if (is_array($args) && count($args) === 2) {
-            $this->autoIncrement = (bool) $args[0];
-            $this->unsigned = (bool) $args[1];
-        } elseif (is_array($args) && count($args) === 1) {
-            $this->autoIncrement = (bool) $args[0];
-            $this->unsigned = false;
+        if (is_array($args)) {
+            $this->autoIncrement = (bool) $args[0] ?? false;
+            $this->unsigned = (bool) $args[1] ?? false;
         } elseif (is_bool($args)) {
             $this->autoIncrement = $args;
             $this->unsigned = false;
diff --git a/src/Dacapo/Domain/ValueObject/Schema/ColumnType/DecimalType.php b/src/Dacapo/Domain/ValueObject/Schema/ColumnType/DecimalType.php
index ce0e04b8..6c281fb7 100644
--- a/src/Dacapo/Domain/ValueObject/Schema/ColumnType/DecimalType.php
+++ b/src/Dacapo/Domain/ValueObject/Schema/ColumnType/DecimalType.php
@@ -14,23 +14,20 @@ class DecimalType implements ColumnType
     public function __construct($args = null)
     {
         if (is_string($args) && $args !== '') {
-            $args = explode(',', $args);
+            $args = array_map('trim', explode(',', $args));
         }
 
-        if (is_array($args) && count($args) === 3) {
-            $this->total = (int) $args[0];
-            $this->places = (int) $args[1];
+        if (is_array($args)) {
+            $this->total = isset($args[0]) ? (int) $args[0] : null;
+            $this->places = isset($args[1]) ? (int) $args[1] : null;
 
-            if (is_string($args[2])) {
-                $this->unsigned = (trim($args[2]) === 'true') ? true : false;
-            } else {
-                $this->unsigned = $args[2];
+            if (isset($args[2])) {
+                if (is_string($args[2])) {
+                    $this->unsigned = $args[2] === 'true';
+                } else {
+                    $this->unsigned = $args[2];
+                }
             }
-        } elseif (is_array($args) && count($args) === 2) {
-            $this->total = (int) $args[0];
-            $this->places = (int) $args[1];
-        } elseif (is_array($args) && count($args) === 1) {
-            $this->total = (int) $args[0];
         } elseif (is_int($args)) {
             $this->total = $args;
         }
diff --git a/src/Dacapo/Domain/ValueObject/Schema/ColumnType/UnsignedDecimalType.php b/src/Dacapo/Domain/ValueObject/Schema/ColumnType/UnsignedDecimalType.php
index 5e87de69..a0d5fc89 100644
--- a/src/Dacapo/Domain/ValueObject/Schema/ColumnType/UnsignedDecimalType.php
+++ b/src/Dacapo/Domain/ValueObject/Schema/ColumnType/UnsignedDecimalType.php
@@ -2,42 +2,13 @@
 
 namespace UcanLab\LaravelDacapo\Dacapo\Domain\ValueObject\Schema\ColumnType;
 
-use UcanLab\LaravelDacapo\Dacapo\Domain\ValueObject\Schema\ColumnName;
-use UcanLab\LaravelDacapo\Dacapo\Domain\ValueObject\Schema\ColumnType;
-
-class UnsignedDecimalType implements ColumnType
+class UnsignedDecimalType extends BaseFloatType
 {
-    protected ?int $total = null;
-    protected ?int $places = null;
-
-    public function __construct($args = null)
-    {
-        if (is_string($args) && $args !== '') {
-            $args = explode(',', $args);
-        }
-
-        if (is_array($args) && count($args) === 2) {
-            $this->total = (int) $args[0];
-            $this->places = (int) $args[1];
-        } elseif (is_array($args) && count($args) === 1) {
-            $this->total = (int) $args[0];
-        } elseif (is_int($args)) {
-            $this->total = $args;
-        }
-    }
-
     /**
-     * @param ColumnName $columnName
      * @return string
      */
-    public function createMigrationMethod(ColumnName $columnName): string
+    protected function getName(): string
     {
-        if (is_int($this->total) && is_int($this->places)) {
-            return sprintf("->unsignedDecimal('%s', %d, %d)", $columnName->getName(), $this->total, $this->places);
-        } elseif (is_int($this->total) && is_int($this->places) === false) {
-            return sprintf("->unsignedDecimal('%s', %d)", $columnName->getName(), $this->total);
-        }
-
-        return sprintf("->unsignedDecimal('%s')", $columnName->getName());
+        return 'unsignedDecimal';
     }
 }
diff --git a/src/Providers/ConsoleServiceProvider.php b/src/Providers/ConsoleServiceProvider.php
index 374996b7..eb0fa655 100644
--- a/src/Providers/ConsoleServiceProvider.php
+++ b/src/Providers/ConsoleServiceProvider.php
@@ -75,23 +75,22 @@ protected function registerBindings(): void
             $this->app->bind($abstract, $concrete);
         }
 
-        $driver = $this->getDatabaseDriver();
-
-        if (isset($this->databaseBuilders[$driver]) === false) {
-            throw new Exception(sprintf('driver %s is not found.', $driver));
-        }
-
-        $this->app->bind(DatabaseBuilder::class, $this->databaseBuilders[$driver]);
+        $this->app->bind(DatabaseBuilder::class, $this->concreteDatabaseBuilder());
     }
 
     /**
      * @return string
+     * @throws Exception
      */
-    protected function getDatabaseDriver(): string
+    protected function concreteDatabaseBuilder(): string
     {
         $connection = config('database.default');
         $driver = config("database.connections.{$connection}.driver");
 
-        return (string) $driver;
+        if (isset($this->databaseBuilders[$driver]) === false) {
+            throw new Exception(sprintf('driver %s is not found.', $driver));
+        }
+
+        return $this->databaseBuilders[$driver];
     }
 }