v3.6.0

What's Changed

• Fix open session after a previous failure by @wudidapaopao in #359
• Fix empty insert caused RuntimeError by @wudidapaopao in #361
• Fix drop table by @wudidapaopao in #364
• Fix memory tracker by @wudidapaopao in #367
• Universal wheel pkg across multiple Python versions by @wudidapaopao in #369
• Fix(sql): add support for query execution with explicit length for char safe handling by @kafka1991 in #373
• Feat(c++): more ergonomic cpp API and add cpp examples by @kafka1991 in #371
• Feat(DBAPI): support ? as placeholder to improve compatibility for DBAPI by @kafka1991 in #370
• Add chdb static library by @wudidapaopao in #362

New Contributors

• @kafka1991 made their first contribution in #373

Full Changelog: v3.5.0...v3.6.0

v3.5.0

What's Changed

• Fix multiple query by @wudidapaopao in #348
• Patch: split Resize/StrictResize to avoid lock contention by @wudidapaopao in #349
• Improve the prompt messages of the command-line tool by @wudidapaopao in #345
• Add version guide by @auxten in #351
• Add PyArrow RecordBatchReader support for streaming data export by @wudidapaopao in #354

# Example of Using PyArrow RecordBatchReader with `deltalake.write_deltalake`
import pyarrow as pa
from deltalake import write_deltalake
from chdb import session as chs

sess = chs.Session()
# Get streaming result in arrow format
stream_result = sess.send_query("SELECT * FROM numbers(100000)", "Arrow")

# Create RecordBatchReader with custom batch size (default rows_per_batch=1000000)
batch_reader = stream_result.record_batch(rows_per_batch=10000)

# Use RecordBatchReader with external libraries like Delta Lake
write_deltalake(
    table_or_uri="./my_delta_table",
    data=batch_reader,
    mode="overwrite"
)

stream_result.close()

sess.close()

Full Changelog: v3.4.1...v3.5.0

v3.4.1

What's Changed

• Fix kafka table engine by @wudidapaopao in #341
• Support delta lake on linux x86-64 platform by @wudidapaopao in #343
• Revert previous changes to MemoryTracker by @wudidapaopao in #344

Full Changelog: v3.4.0...v3.4.1

v3.4.0

What's Changed

• Move session temp path management from Python to C++ by @wudidapaopao in #337
• Upgrade ClickHouse version to v25.5.2.47 by @wudidapaopao in #338
• Fix crash on macos x86 platform by @wudidapaopao in #340

Full Changelog: v3.3.0...v3.4.0

v3.3.0

What's Changed

• Fix signal loss by removing the signal handler in the ClickHouse engine by @wudidapaopao in #327
• Add README documentation for JSON type support and new interface by @wudidapaopao in #335
• Add storage_rows_read and storage_bytes_read interfaces for retrieving storage metrics by @wudidapaopao in #334
• Implement JSON type support by @wudidapaopao in #330

import chdb
import pandas as pd

dict_data = {
        "a": [1, 2, 3, 4, 5, 6],
        "b": ["tom", "jerry", "auxten", "tom", "jerry", "auxten"],
        "dict_col": [
            {'id': 1, 'tags': ['urgent', 'important'],
                'metadata': {'created': '2024-01-01'}},
            {'id': 2, 'tags': ['normal'], 
                'metadata': {'created': '2024-02-01'}},
            {'id': 3, 'name': 'tom'},
            {'id': 4, 'value': '100'},
            {'id': 5, 'value': 101},
            {'id': 6, 'value': 102},
        ],
    }

df = pd.DataFrame(dict_data)

chdb.query("SELECT b, sum(a) FROM Python(df) GROUP BY b ORDER BY b").show()
# "auxten",9
# "jerry",7
# "tom",5

chdb.query(
    "SELECT dict_col.id FROM Python(dict_data) WHERE dict_col.value='100'"
).show()
# 4

Full Changelog: v3.2.0...v3.3.0

v3.2.0

What's Changed

• Add connection based API example by @auxten in #319
• Fix the potential memory leak issue caused by query result memory not being properly released by @wudidapaopao in #320
• Add support for streaming query in chDB by @wudidapaopao in #326

New Contributors

• @wudidapaopao made their first contribution in #320

Streaming API

Full Changelog: v3.1.2...v3.2.0

v3.1.2

What's Changed

• Fix connection_wrapper destructor sometimes closing other connections by @meastham in #312
• Disable AVX2 by default by @auxten in #314

New Contributors

• @meastham made their first contribution in #312

Full Changelog: v3.1.1...v3.1.2

v3.1.1

What's Changed

• Fix Null, UUID and df arrow table output format by @auxten in #308

Full Changelog: v3.1.0...v3.1.1

v3.1.0

What's Changed

• Python 3.13 support by @auxten in #305

Full Changelog: v3.0.1...v3.1.0

v3.0.1

What's Changed

• Patchset post v3.0.0 by @auxten in #299
• Fix artifacts conflict by @auxten in #303
• Fix chdb dbapi to properly escape slashes during inserts. by @bocharov in #297
• Patchset for 3.0.1 by @auxten in #304

New Contributors

• @bocharov made their first contribution in #297

Full Changelog: v3.0.0...v3.0.1