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110 lines
3.5 KiB
Python
110 lines
3.5 KiB
Python
# Copyright 2023 LanceDB Developers
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import pyarrow as pa
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import lancedb
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from lancedb.schema import dict_to_schema, schema_to_dict
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def test_schema_to_dict():
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schema = pa.schema(
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[
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pa.field("id", pa.int64()),
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pa.field("vector", lancedb.vector(512), nullable=False),
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pa.field(
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"struct",
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pa.struct(
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[
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pa.field("a", pa.utf8()),
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pa.field("b", pa.float32()),
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]
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),
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True,
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),
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pa.field("d", pa.dictionary(pa.int64(), pa.utf8()), False),
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],
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metadata={"key": "value"},
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)
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json_schema = schema_to_dict(schema)
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assert json_schema == {
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"fields": [
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{"name": "id", "type": {"type": "int64"}, "nullable": True},
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{
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"name": "vector",
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"type": {
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"type": "fixed_size_list",
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"value_type": {"type": "float32"},
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"width": 512,
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},
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"nullable": False,
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},
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{
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"name": "struct",
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"type": {
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"type": "struct",
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"fields": [
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{"name": "a", "type": {"type": "string"}, "nullable": True},
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{"name": "b", "type": {"type": "float32"}, "nullable": True},
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],
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},
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"nullable": True,
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},
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{
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"name": "d",
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"type": {
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"type": "dictionary",
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"index_type": {"type": "int64"},
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"value_type": {"type": "string"},
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},
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"nullable": False,
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},
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],
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"metadata": {"key": "value"},
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}
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actual_schema = dict_to_schema(json_schema)
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assert actual_schema == schema
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def test_temporal_types():
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schema = pa.schema(
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[
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pa.field("t32", pa.time32("s")),
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pa.field("t32ms", pa.time32("ms")),
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pa.field("t64", pa.time64("ns")),
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pa.field("ts", pa.timestamp("s")),
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pa.field("ts_us_tz", pa.timestamp("us", tz="America/New_York")),
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],
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)
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json_schema = schema_to_dict(schema)
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assert json_schema == {
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"fields": [
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{"name": "t32", "type": {"type": "time32:s"}, "nullable": True},
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{"name": "t32ms", "type": {"type": "time32:ms"}, "nullable": True},
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{"name": "t64", "type": {"type": "time64:ns"}, "nullable": True},
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{"name": "ts", "type": {"type": "timestamp:s:"}, "nullable": True},
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{
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"name": "ts_us_tz",
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"type": {"type": "timestamp:us:America/New_York"},
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"nullable": True,
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},
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],
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"metadata": {},
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}
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actual_schema = dict_to_schema(json_schema)
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assert actual_schema == schema
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