feat: create dtype option for csv upload (#23716)

superset/views/database/views.py

@@ -15,6 +15,7 @@
 # specific language governing permissions and limitations
 # under the License.
 import io
+import json
 import os
 import tempfile
 import zipfile
@@ -189,6 +190,7 @@ class CsvToDatabaseView(CustomFormView):
             delimiter_input = form.otherInput.data
 
         try:
+            kwargs = {"dtype": json.loads(form.dtype.data)} if form.dtype.data else {}
             df = pd.concat(
                 pd.read_csv(
                     chunksize=1000,
@@ -208,6 +210,7 @@ class CsvToDatabaseView(CustomFormView):
                     skip_blank_lines=form.skip_blank_lines.data,
                     skipinitialspace=form.skip_initial_space.data,
                     skiprows=form.skiprows.data,
+                    **kwargs,
                 )
             )