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Lakehouse Formats 13214
Lakehouse formats, often referred to as open table formats, are specifications for storing data in object storage while maintaining some guarantees such as ACID transactions or keeping snapshot history. Over time, multiple lakehouse formats ... ix DuckDB supports Iceberg, Delta, Lance and DuckLake as first-class citizens. The following matrix represents what DuckDB natively supports out of the box through core extensions. DuckLake Iceberg Delta Lance Extension ducklake iceberg delta lance Read ... xample, has no dependencies on third-party Iceberg libraries, which means all data and metadata operations are implemented natively in the DuckDB extension. For the delta extension, we use the delta-kernel-rs project , which is meant to be a lightweight ...
https://man.mtool.work/duckdb/2.0/lakehouse_formats.html
ICU Extension 10891
The icu extension provides collation, time zone, and calendar support. New In DuckDB 2.0, the dependency on the external ICU library was removed. The icu extension now implements collations, time zones, and calendars natively, with time zon ...
https://man.mtool.work/duckdb/2.0/core_extensions/icu.html
Beekeeper Studio SQL Editor 10557
Beekeeper Studio is a free, open-source SQL editor and database manager with a modern, easy-to-use interface. It is available for Windows, macOS, and Linux, and also offers a paid Ultimate tier with cloud sync and team-sharing features. Bee ... keeper Studio connects to DuckDB natively rather than through a JDBC or ODBC driver, so no separate driver installation is required. Installing Beekeeper Studio Ins ...
https://man.mtool.work/duckdb/2.0/guides/sql_editors/beekeeper_studio.html
Integration with Polars 9220
Polars is a DataFrames library built in Rust with bindings for Python and Node.js. It uses Apache Arrow's columnar format as its memory model. DuckDB can read Polars DataFrames and convert query results to Polars DataFrames. It does this in ... be installed for the integration to work. Installation pip install -U duckdb 'polars[pyarrow]' Polars to DuckDB DuckDB can natively query Polars DataFrames and LazyFrames by referring to their names as they exist in the current scope. DuckDB pushes the c ...
https://man.mtool.work/duckdb/2.0/guides/python/polars.html
Troubleshoot 8551
Overview This page collects common issues encountered when using the DuckDB Rust client, together with their workarounds. If you run into a problem that is not covered here, search the client's issue tracker on GitHub. Linking against a Sys ... In DuckDB 2.0, the icu extension no longer depends on the ICU library and implements time zones, calendars and collations natively. If some collation or time-zone-aware date/time operations still fail out of the box with your crate version, install and ... load the extension at runtime: conn.execute_batch("INSTALL icu; LOAD icu;")?; Alternatively, statically link the extension by enabling the crate's icu feature, which pulls it into the build. open_in_memory Panics i ...
https://man.mtool.work/duckdb/2.0/clients/rust/troubleshoot.html
Unofficial and Unsupported Platforms 8551
Warning The platforms listed on this page are not officially supported. The build instructions are provided on a best-effort basis. Community contributions are very welcome. DuckDB is built and distributed for several platforms with differe ... n certain operations. Therefore, its use is not recommended. RISC-V Architectures Native Build (Recommended) DuckDB builds natively on RISC-V 64-bit boards without any special flags. Tested on a BananaPi F3 ( SpacemiT K1 , rv64gc, 8 cores @ 1.6 GHz, 16 G ...
https://man.mtool.work/duckdb/2.0/dev/building/unofficial_and_unsupported_platfo...
Timestamp Issues 8551
Timestamp with Time Zone Promotion Casts Working with time zones in SQL can be quite confusing at times. For example, when filtering to a date range, one might try the following query: SET timezone = 'America/Los_Angeles'; CREATE TABLE time ... ension no longer depends on the International Components for Unicode (ICU) library: it implements time zones and calendars natively, using time zone data built from the IANA time zone database . This implementation supports daylight savings time past 203 ...
https://man.mtool.work/duckdb/2.0/guides/sql_features/timestamps.html
Data Chunks 8217
Data chunks represent a horizontal slice of a table. They hold a number of vectors , that can each hold up to the VECTOR_SIZE rows. The vector size can be obtained through the duckdb_vector_size function and is configurable, but is usually ... set to 2048 . Data chunks and vectors are what DuckDB uses natively to store and represent data. For this reason, the data chunk interface is the most efficient way of interfacing with DuckD ...
https://man.mtool.work/duckdb/2.0/clients/c/data_chunk.html
Jupyter Notebooks 7900
DuckDB's Python client can be used directly in Jupyter notebooks with no additional configuration, as the first section shows. Additional libraries can simplify SQL query development; the rest of this guide uses the JupySQL package. See oth ... %config SqlMagic.autopandas = True %config SqlMagic.feedback = 0 %config SqlMagic.displaycon = False Connecting to DuckDB Natively To connect to DuckDB, run: import duckdb import pandas as pd %load_ext sql conn = duckdb.connect(config={"python_scan_all_ ... LAlchemy. Warning Variables are not recognized within a native DuckDB connection. Connecting to DuckDB via SQLAlchemy Alternatively, you can connect to DuckDB via SQLAlchemy using duckdb_engine . See the performance and feature differences . import duckd ...
https://man.mtool.work/duckdb/2.0/guides/python/jupyter.html
Migrating to DuckDB 2.0 7566
DuckDB 2.0.0 is packed with new features and performance improvements, including query optimization and asynchronous I/O. It also ships a small set of breaking changes, most notably a new default storage format, which DuckDB versions before ... re Build DuckDB 2.0.0 removed the dependency on the ICU library . Time zones, calendars and collations are now implemented natively by the icu extension , and will continue to behave as before. No query changes are required, but if you ship a custom buil ...
https://man.mtool.work/duckdb/2.0/operations_manual/migration.html
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