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- Editing 13229
- The linenoise-based CLI editor is available for macOS, Linux and Windows. DuckDB's CLI uses a line-editing library based on linenoise , which has shortcuts that are based on Emacs mode of readline . Below is a list of available commands. Yo
...o view these shortcuts from within the CLI using .help shortcuts . Moving Key Action Left Move back a character Right Move forward a character Up Move up a line. When on the first line, move to previous history entry Down Move down a line. When on last...xt history entry Home Move to beginning of buffer End Move to end of buffer Ctrl + Left Move back a word Ctrl + Right Move forward a word Ctrl + A Move to beginning of line Ctrl + B Move back a character Ctrl + E Move to end of line Ctrl + F Move forwar...d a character Alt + Left Move back a word Alt + Right Move forward a word History Key Action Ctrl + P Move to previous history entry Ctrl + N Move to next history entry Ctrl + R Reverse sea... - https://man.mtool.work/duckdb/2.0/clients/cli/editing.html
- Storage Versions and Format 10529
- Compatibility Backward Compatibility Backward compatibility refers to the ability of a newer DuckDB version to read storage files created by an older DuckDB version. Version 0.10 is the first release of DuckDB that supports backward compati
...e files without having to worry about which version the file was written with or having to convert files between versions. Forward Compatibility Forward compatibility refers to the ability of an older DuckDB version to read storage files produced by a n...ewer DuckDB version. DuckDB 0.9 is partially forward compatible with DuckDB 0.10 . Certain files created by DuckDB 0.10 can be read by DuckDB 0.9. Forward compatibility is pro...ant – there are still many improvements and innovations that we want to make to the storage format in the future. As such, forward compatibility may be (partially) broken on occasion. Warning DuckDB versions before 2.0 cannot read database files that us... - https://man.mtool.work/duckdb/2.0/internals/storage.html
- Text Functions 10529
- Text Functions and Operators This section describes functions and operators for examining and manipulating STRING values . Function Description string[index] Extracts a single character using a (1-based) index . string[begin:end] Extracts a
..., separator]) Returns the top-level directory name from the given path . separator options: system , both_slash (default), forward_slash , backslash . parse_dirpath(path[, separator]) Returns the head of the path (the pathname until the last slash) simi...larly to Python's os.path.dirname . separator options: system , both_slash (default), forward_slash , backslash . parse_filename(string[, trim_extension][, separator]) Returns the last component of the path similarly...nsion is true , the file extension will be removed (defaults to false ). separator options: system , both_slash (default), forward_slash , backslash . parse_path(path[, separator]) Returns a list of the components (directories and filename) in the path... - https://man.mtool.work/duckdb/2.0/sql/functions/text.html
- Profile and Monitor 8223
- Overview The Go client can observe query execution: it can retrieve per-operator profiling metrics after a query runs, and register a log storage that receives DuckDB's log messages. Both are described below. Profiling Profiling information
...tracked_metrics option. See the Profiling page and the metrics list for the available metric names. Log Storage DuckDB can forward its log messages to a custom storage registered from Go. Register one on a Connector with duckdb.RegisterLogStorage() , gi...le it with CALL enable_logging() in addition to selecting the storage with SET logging_storage . Once both are set, DuckDB forwards all log calls to the callback. Further Reading Profiling — DuckDB's query profiling output and the enable_profiling and t... - https://man.mtool.work/duckdb/2.0/clients/go/profiling.html
- Run Queries 7955
- Overview A Connection runs SQL through two families of methods: The execute_* methods ( execute() and execute_batch() ) send statements that do not return rows, such as INSERT or DDL, and report the number of affected rows. The query_* meth
...:?}"); } Value , ValueRef , and Type are marked non-exhaustive, so a match over them should include a wildcard arm to stay forward-compatible as DuckDB adds types. To read whole result sets as columnar batches instead of row by row, see Handle Results .... - https://man.mtool.work/duckdb/2.0/clients/rust/querying.html
- Statically Linking Extensions 7955
- This page is for client and binding authors, and for anyone who embeds libduckdb in their own application. It describes how statically linking extensions changed in DuckDB 2.0 and what builders on top of DuckDB need to do. This change is in
...ntations for Clients The following pull requests adapt the official clients to the v2.0 linking model. They provide a path forward for anyone maintaining a binding or an application that links libduckdb . Client Status Reference pull requests Python Mig... - https://man.mtool.work/duckdb/2.0/dev/building/linking_extensions.html
- Python API 7812
- Installation To use the DuckDB Python client, visit the Python installation page . The latest stable version of the DuckDB Python client is 2.0.0. Installation The DuckDB Python API can be installed using pip : pip install duckdb . Please s
...pported. If you are upgrading from DuckDB 1.x, see Migrating Python Code to DuckDB 2.0 . Basic API Usage The most straight-forward manner of running SQL queries using DuckDB is using the duckdb.sql command. import duckdb duckdb.sql("SELECT 42").show() T... - https://man.mtool.work/duckdb/2.0/clients/python/overview.html
- ODBC Extension 7812
- Please note that DuckDB also offers an ODBC client , which allows you to connect to DuckDB via ODBC from other applications. The odbc_scanner extension allows connecting to other databases (using their ODBC drivers ) and run queries with th
...ery is run using prepared statement, it is possible to pass input parameters from the client code. The extension allows to forward such input parameters over ODBC API to the queries to remote databases. Two methods of passing query parameters are suppor...es to it with duckdb_bind_value() and execute it with duckdb_execute_prepared() - the input parameters foo and bar will be forwarded to the ODBC query in the remote DB. The problem with this approach, is that DuckDB is unable to resolve parameter types... - https://man.mtool.work/duckdb/2.0/core_extensions/odbc/overview.html
- Delta Extension 7687
- The delta extension adds support for the Delta Lake open-source storage format . It is built using the Delta Kernel . The extension reads Delta tables, local and remote, and writes them: it can create tables and append to them. For implemen
...IDs: strict raises an error, lenient matches its columns by name. See Column Mapping . delta_kernel_logging BOOLEAN false Forward the internal logging of the Delta Kernel to the DuckDB logger. May impact performance even when DuckDB logging is disabled... - https://man.mtool.work/duckdb/2.0/core_extensions/delta.html
- Timestamp with Time Zone Functions 7544
- This section describes functions and operators for examining and manipulating TIMESTAMP WITH TIME ZONE (or TIMESTAMPTZ ) values . See also the related TIMESTAMP functions . Time zone support is provided by the built-in ICU extension . In th
...s of the ICU Calendar add function , which the icu extension implements natively since DuckDB 2.0. For positive intervals (forwards in time) the fields are incremented from most to least significant. For negative intervals (backwards in time) the fields...on a non-existent time during daylight saving time transitions. DuckDB follows PostgreSQL behavior and adjusts the result forward to the next valid timestamp. Example: SET timezone = 'Europe/Amsterdam'; SELECT TIMESTAMPTZ '2025-03-29 02:30:00+01' + INT... - https://man.mtool.work/duckdb/2.0/sql/functions/timestamptz.html
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