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- Building Configuration – DuckDB 12801
- This page is for DuckDB 1.3, which is outdated. Switch to the current version . Search Shortcut cmd + k | ctrl + k Installation Documentation Getting Started Connect Overview Concurrency Data Import Overview Data Sources CSV Files Overview
...on and are served by the core extension repository. Core extensions can be built as part of DuckDB via the CORE_EXTENSIONS flag, then listing the names of the extensions that are to be built. CORE_EXTENSIONS = 'tpch;httpfs;fts;json;parquet' make More...on this topic at building duckdb extensions . Package Flags For every package that is maintained by core DuckDB, there exists a flag in the Makefile to enable building the package....rc or zshrc , or by setting them before the call to make , for example: BUILD_PYTHON = 1 make debug BUILD_PYTHON When this flag is set, the Python package is built. BUILD_SHELL When this flag is set, the CLI is built, this is usually enabled by defau... - https://man.mtool.work/duckdb/1.3/dev/building/build_configuration.html
- Configuration – DuckDB 12688
- This page is for DuckDB 1.3, which is outdated. Switch to the current version . Search Shortcut cmd + k | ctrl + k Installation Documentation Getting Started Connect Overview Concurrency Data Import Overview Data Sources CSV Files Overview
...b_state duckdb_create_config ( duckdb_config * out_config ); size_t duckdb_config_count (); duckdb_state duckdb_get_config_flag ( size_t index , const char ** out_name , const char ** out_description ); duckdb_state duckdb_set_config ( duckdb_config...ure. duckdb_config_count This returns the total amount of configuration options available for usage with duckdb_get_config_flag . This should not be called in a loop as it internally loops over all the options. Return Value The amount of config optio...ns available. Syntax size_t duckdb_config_count ( ); duckdb_get_config_flag Obtains a human-readable name and description of a specific configuration option. This can be used to e.g. display configu... - https://man.mtool.work/duckdb/1.3/clients/c/config.html
- Building Extensions – DuckDB 11762
- This page is for DuckDB 1.3, which is outdated. Switch to the current version . Search Shortcut cmd + k | ctrl + k Installation Documentation Getting Started Connect Overview Concurrency Data Import Overview Data Sources CSV Files Overview
...sions can be built from source and installed from the resulting local binary. Building Extensions To build using extension flags, set the CORE_EXTENSIONS flag to the list of extensions that you want to be build. For example: CORE_EXTENSIONS = 'autoco...a' GEN = ninja make In most cases, extension will be directly linked in the resulting DuckDB executable. Special Extension Flags BUILD_JEMALLOC When this flag is set, the jemalloc extension is built. BUILD_TPCE When this flag is set, the TPCE libray...roper extension and it's not distributed as such. Enabling this allows TPC-E enabled queries through our test suite. Debug Flags CRASH_ON_ASSERT D_ASSERT(condition) is used all throughout the code, these will throw an InternalException in debug build... - https://man.mtool.work/duckdb/1.3/dev/building/building_extensions.html
- Benchmark Suite – DuckDB 10023
- This page is for DuckDB 1.3, which is outdated. Switch to the current version . Search Shortcut cmd + k | ctrl + k Installation Documentation Getting Started Connect Overview Concurrency Data Import Overview Data Sources CSV Files Overview
...0.122534 benchmark/micro/nulls/no_nulls_addition.benchmark 5 0.124102 You can also specify an output file using the --out flag. This will write only the timings (delimited by newlines) to that file. build/release/benchmark/benchmark_runner benchmark...rks Not specifying any argument will run all benchmarks. build/release/benchmark/benchmark_runner Other Options The --info flag gives you some other information about the benchmark. build/release/benchmark/benchmark_runner benchmark/micro/nulls/no_nu...lls_addition.benchmark --info display_name:NULL Addition (no nulls) group:micro subgroup:nulls The --query flag will print the query that is run by the benchmark. SELECT min ( i + 1 ) FROM integers ; The --profile flag will output a q... - https://man.mtool.work/duckdb/1.3/dev/benchmark.html
- Hive Partitioning – DuckDB 9812
- This page is for DuckDB 1.3, which is outdated. Switch to the current version . Search Shortcut cmd + k | ctrl + k Installation Documentation Getting Started Connect Overview Concurrency Data Import Overview Data Sources CSV Files Overview
...│ └── file5.parquet └── month=12 └── file6.parquet Files stored in this hierarchy can be read using the hive_partitioning flag. SELECT * FROM read_parquet ( 'orders/*/*/*.parquet' , hive_partitioning = true ); When we specify the hive_partitioning f...ault the system tries to infer if the provided files are in a hive partitioned hierarchy. And if so, the hive_partitioning flag is enabled automatically. The auto-detection will look at the names of the folders and search for a 'key' = 'value' patter...e_types will be auto-detected for the following types: DATE , TIMESTAMP and BIGINT . To switch off the auto-detection, the flag hive_types_autocast = 0 can be set. Writing Partitioned Files See the Partitioned Writes section. 関連キーワード parquet h... - https://man.mtool.work/duckdb/1.3/data/partitioning/hive_partitioning.html
- Attach to a DuckDB Database over HTTPS or S3 – DuckDB 8789
- This page is for DuckDB 1.3, which is outdated. Switch to the current version . Search Shortcut cmd + k | ctrl + k Installation Documentation Getting Started Connect Overview Concurrency Data Import Overview Data Sources CSV Files Overview
...ATTACH statement creates a read-only connection to HTTP endpoints. In prior versions, it is necessary to use the READ_ONLY flag. Then, the database can be queried using: SELECT count ( * ) AS num_stations FROM stations_db.stations ; num_stations 578...ATTACH statement creates a read-only connection to HTTP endpoints. In prior versions, it is necessary to use the READ_ONLY flag. The database can be queried using: SELECT count ( * ) AS num_stations FROM stations_db.stations ; num_stations 578 Connec...tion using Cloud Storage httpfs Attaching connect follows blobs databases Since creates endpoints prior versions necessary flag 関連するページ ATTACH and DETACH Statements Sharing Macros Google Cloud Storage Import Connect Python API Python DB API Se... - https://man.mtool.work/duckdb/1.3/guides/network_cloud_storage/duckdb_over_https...
- CSV Import Tips – DuckDB 8691
- This page is for DuckDB 1.3, which is outdated. Switch to the current version . Search Shortcut cmd + k | ctrl + k Installation Documentation Getting Started Connect Overview Concurrency Data Import Overview Data Sources CSV Files Overview
...ips to help when attempting to import complex CSV files. In the examples, we use the flights.csv file. Override the Header Flag if the Header Is Not Correctly Detected If a file contains only string columns the header auto-detection might fail. Provi...M read_csv ( 'flights.csv' , names = [ 'DateOfFlight' , 'CarrierName' ]); Override the Types of Specific Columns The types flag can be used to override types of only certain columns by providing a struct of name → type mappings. SELECT * FROM read_cs...© 2026 DuckDB Foundation, Amsterdam NL DuckDB Home Code of Conduct Trademark Use Blog In this article Override the Header Flag if the Header Is Not Correctly Detected Provide Names if the File Does Not Contain a Header Override the Types of Specific... - https://man.mtool.work/duckdb/1.3/data/csv/tips.html
- Regular Expressions – DuckDB 8074
- This page is for DuckDB 1.3, which is outdated. Switch to the current version . Search Shortcut cmd + k | ctrl + k Installation Documentation Getting Started Connect Overview Concurrency Data Import Overview Data Sources CSV Files Overview
...art with replacement . By default, only the first occurrence is replaced. A set of optional options , including the global flag g , can be set. regexp_split_to_array(string, regex[, options]) Alias of string_split_regex . Splits the string along the...art with replacement . By default, only the first occurrence is replaced. A set of optional options , including the global flag g , can be set. Example regexp_replace('hello', '[lo]', '-') Result he-lo regexp_split_to_array(string, regex[, options])...ace only replaces the first occurrence of the regular expression. To replace all occurrences, use the global replace ( g ) flag. Some examples for using regexp_replace : SELECT regexp_replace ( 'abc' , '(b|c)' , 'X' ); -- aXc SELECT regexp_replace (... - https://man.mtool.work/duckdb/1.3/sql/functions/regular_expressions.html
- Complete API – DuckDB 7976
- This page is for DuckDB 1.3, which is outdated. Switch to the current version . Search Shortcut cmd + k | ctrl + k Installation Documentation Getting Started Connect Overview Concurrency Data Import Overview Data Sources CSV Files Overview
...b_state duckdb_create_config ( duckdb_config * out_config ); size_t duckdb_config_count (); duckdb_state duckdb_get_config_flag ( size_t index , const char ** out_name , const char ** out_description ); duckdb_state duckdb_set_config ( duckdb_config...ure. duckdb_config_count This returns the total amount of configuration options available for usage with duckdb_get_config_flag . This should not be called in a loop as it internally loops over all the options. Return Value The amount of config optio...ns available. Syntax size_t duckdb_config_count ( ); duckdb_get_config_flag Obtains a human-readable name and description of a specific configuration option. This can be used to e.g. display configu... - https://man.mtool.work/duckdb/1.3/clients/c/api.html
- Extension Distribution – DuckDB 7976
- This page is for DuckDB 1.3, which is outdated. Switch to the current version . Search Shortcut cmd + k | ctrl + k Installation Documentation Getting Started Connect Overview Concurrency Data Import Overview Data Sources CSV Files Overview
...ou wish to load your own extensions or extensions from third-parties you will need to enable the allow_unsigned_extensions flag. To load unsigned extensions using the CLI client , pass the -unsigned flag to it on startup: duckdb -unsigned Now any ext... - https://man.mtool.work/duckdb/1.3/extensions/extension_distribution.html
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