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[python] Support FixedSizeBinary in schema conversion #538

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Merged
fresh-borzoni merged 1 commit into from
May 9, 2026
Merged

[python] Support FixedSizeBinary in schema conversion #538

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1 change: 1 addition & 0 deletions bindings/python/src/utils.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -57,6 +57,7 @@ impl Utils {
ArrowDataType::Float64 => DataTypes::double(),
ArrowDataType::Utf8 | ArrowDataType::LargeUtf8 => DataTypes::string(),
ArrowDataType::Binary | ArrowDataType::LargeBinary => DataTypes::bytes(),
ArrowDataType::FixedSizeBinary(n) => DataTypes::binary(*n as usize),
ArrowDataType::Date32 => DataTypes::date(),
ArrowDataType::Date64 => DataTypes::date(),
ArrowDataType::Time32(unit) => match unit {
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3 changes: 3 additions & 0 deletions bindings/python/test/test_kv_table.py
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Expand Up @@ -358,6 +358,7 @@ async def test_all_supported_datatypes(connection, admin):
pa.field("col_timestamp_ntz", pa.timestamp("us")),
pa.field("col_timestamp_ltz", pa.timestamp("us", tz="UTC")),
pa.field("col_bytes", pa.binary()),
pa.field("col_binary", pa.binary(16)),
]
),
primary_keys=["pk_int"],
Expand Down Expand Up @@ -385,6 +386,7 @@ async def test_all_supported_datatypes(connection, admin):
"col_timestamp_ntz": datetime(2026, 1, 23, 10, 13, 47, 123000),
"col_timestamp_ltz": datetime(2026, 1, 23, 10, 13, 47, 123000),
"col_bytes": b"binary data",
"col_binary": b"binary_data_0123",
}

handle = upsert_writer.upsert(row_data)
Expand All @@ -411,6 +413,7 @@ async def test_all_supported_datatypes(connection, admin):
2026, 1, 23, 10, 13, 47, 123000, tzinfo=timezone.utc
)
assert result["col_bytes"] == b"binary data"
assert result["col_binary"] == b"binary_data_0123"

# Test with null values for all nullable columns
null_row = {"pk_int": 2}
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1 change: 1 addition & 0 deletions website/docs/user-guide/python/data-types.md
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Expand Up @@ -12,6 +12,7 @@ The Python client uses PyArrow types for schema definitions:
| `pa.float32()` / `float64()` | Float / Double | `float` |
| `pa.string()` | String | `str` |
| `pa.binary()` | Bytes | `bytes` |
| `pa.binary(n)` | Binary(n) | `bytes` |
| `pa.date32()` | Date | `datetime.date` |
| `pa.time32("ms")` | Time | `datetime.time` |
| `pa.timestamp("us")` | Timestamp (NTZ) | `datetime.datetime` |
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