diff --git a/libs/output-mapping/src/Mapping/MappingFromConfigurationSchemaColumnDataType.php b/libs/output-mapping/src/Mapping/MappingFromConfigurationSchemaColumnDataType.php
index 8f80975ec..2003d086e 100644
--- a/libs/output-mapping/src/Mapping/MappingFromConfigurationSchemaColumnDataType.php
+++ b/libs/output-mapping/src/Mapping/MappingFromConfigurationSchemaColumnDataType.php
@@ -92,7 +92,7 @@ public function getBackendDefaultValue(string $backend): ?string
 
     public function hasBackendType(string $backend): bool
     {
-        if (!isset($this->mapping[$backend])) {
+        if (!isset($this->mapping[$backend]['type'])) {
             return false;
         }
         return true;
diff --git a/libs/output-mapping/src/Writer/Table/TableDefinitionFromSchema/TableDefinitionFromSchemaColumn.php b/libs/output-mapping/src/Writer/Table/TableDefinitionFromSchema/TableDefinitionFromSchemaColumn.php
index 9dbe46cbc..39ed105a4 100644
--- a/libs/output-mapping/src/Writer/Table/TableDefinitionFromSchema/TableDefinitionFromSchemaColumn.php
+++ b/libs/output-mapping/src/Writer/Table/TableDefinitionFromSchema/TableDefinitionFromSchemaColumn.php
@@ -39,10 +39,7 @@ public function getRequestData(): array
             //    $definition['default'] = $dataType->getDefaultValue($this->backend);
             // }
 
-            if ($definition && !isset($definition['type'])) {
-                $definition['type'] = $dataType->getTypeName($this->backend);
-            }
-            if ($definition) {
+            if (isset($definition['type'])) {
                 $data['definition'] = $definition;
             }
         }
diff --git a/libs/output-mapping/tests/Writer/Table/TableDefinitionFromSchema/TableDefinitionFromSchemaColumnTest.php b/libs/output-mapping/tests/Writer/Table/TableDefinitionFromSchema/TableDefinitionFromSchemaColumnTest.php
index 6d1fc4265..aa4766ee0 100644
--- a/libs/output-mapping/tests/Writer/Table/TableDefinitionFromSchema/TableDefinitionFromSchemaColumnTest.php
+++ b/libs/output-mapping/tests/Writer/Table/TableDefinitionFromSchema/TableDefinitionFromSchemaColumnTest.php
@@ -169,5 +169,24 @@ public function columnDataProvider(): Generator
                 'basetype' => 'STRING',
             ],
         ];
+
+        yield 'backend definition without type' => [
+            'column' => new MappingFromConfigurationSchemaColumn([
+                'name' => 'test_table_name',
+                'data_type' => [
+                    'base' => [
+                        'type' => 'STRING',
+                    ],
+                    'snowflake' => [
+                        'length' => '1024',
+                    ],
+                ],
+            ]),
+            'backend' => 'snowflake',
+            'expectedStructure' => [
+                'name' => 'test_table_name',
+                'basetype' => 'STRING',
+            ],
+        ];
     }
 }
diff --git a/libs/output-mapping/tests/Writer/TableDefinitionV2BigQueryTest.php b/libs/output-mapping/tests/Writer/TableDefinitionV2BigQueryTest.php
index 08903ee74..2c81a3d15 100644
--- a/libs/output-mapping/tests/Writer/TableDefinitionV2BigQueryTest.php
+++ b/libs/output-mapping/tests/Writer/TableDefinitionV2BigQueryTest.php
@@ -259,7 +259,6 @@ public function configProvider(): Generator
                 ],
                 'birthweight' => [
                     'type' => Bigquery::TYPE_NUMERIC,
-                    'length' => '38,9',
                     'nullable' => true,
                 ],
                 'created' => [
diff --git a/libs/output-mapping/tests/Writer/TableDefinitionV2Test.php b/libs/output-mapping/tests/Writer/TableDefinitionV2Test.php
index 0601a701d..8e62a1b7d 100644
--- a/libs/output-mapping/tests/Writer/TableDefinitionV2Test.php
+++ b/libs/output-mapping/tests/Writer/TableDefinitionV2Test.php
@@ -361,7 +361,7 @@ public function configProvider(): Generator
             [
                 'Id' => [
                     'type' => Snowflake::TYPE_NUMBER,
-                    'length' => '38,0', // default integer length
+                    'length' => '38,9', // default integer length
                     'nullable' => false,
                 ],
                 'Name' => [
@@ -473,8 +473,12 @@ private static function assertDataTypeDefinition(array $definitionColumn, array
         $definitionColumn = current($definitionColumn);
 
         self::assertSame($expectedType['type'], $definitionColumn['definition']['type']);
-        self::assertSame($expectedType['length'], $definitionColumn['definition']['length']);
-        self::assertSame($expectedType['nullable'], $definitionColumn['definition']['nullable']);
+        if (isset($expectedType['length'])) {
+            self::assertSame($expectedType['length'], $definitionColumn['definition']['length']);
+        }
+        if (isset($definitionColumn['nullable'])) {
+            self::assertSame($expectedType['nullable'], $definitionColumn['definition']['nullable']);
+        }
     }
 
     #[NeedsTestTables]