From f694c300b275f13f3fd21b386aeeb19f5bd7aba9 Mon Sep 17 00:00:00 2001 From: Anton Butsyk Date: Tue, 16 Jun 2026 14:49:51 +0300 Subject: [PATCH] [MCC-1515548] Python Lib - Data type of fetch_data() does not match data type as shown in PWB --- dataconnect/service/mappers.py | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/dataconnect/service/mappers.py b/dataconnect/service/mappers.py index cd819ec..cedfec1 100644 --- a/dataconnect/service/mappers.py +++ b/dataconnect/service/mappers.py @@ -64,7 +64,13 @@ def resource_to_fetched_data(table: DataTable) -> pd.DataFrame: ipc_buffer = pa.BufferReader(table.ipc_bytes) with pa.ipc.open_stream(ipc_buffer) as reader: - return reader.read_all().to_pandas(types_mapper=pd.ArrowDtype) + arrow_table = reader.read_all() + + # Clear schema metadata so types_mapper reliably maps Arrow types to ArrowDtype + # (embedded pandas metadata can override types_mapper, causing object dtypes). + arrow_table = arrow_table.replace_schema_metadata(None) + + return arrow_table.to_pandas(types_mapper=pd.ArrowDtype) def resource_to_dataset(resource: ResourceInfo) -> Dataset: