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- HTTP(S) Support – DuckDB 13712
- This page is for DuckDB 1.3, which is outdated.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
...s to be read at all as they only require reading the metadata: SELECT count ( * ) FROM 'https://domain.tld/file.parquet' ; Scanning Multiple Files Scanning multiple files over HTTP(S) is also supported: SELECT * FROM read_parquet ([ 'https://domain.tld/f...tpfs extension read query DuckDB Parquet metadata column username password over supported cases supports reading following Scanning using 関連するページ HTTP Parquet Import Configuration httpfs Extension for HTTP and S3 Support Reading and Writing Parque...ssue © 2026 DuckDB Foundation, Amsterdam NL DuckDB Home Code of Conduct Trademark Use Blog In this article Partial Reading Scanning Multiple Files Authenticating HTTP Proxy Using a Custom Certificate File... - https://man.mtool.work/duckdb/1.3/core_extensions/httpfs/https.html
- Delta Extension – DuckDB 9868
- This page is for DuckDB 1.3, which is outdated.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
...ROM delta_scan ( 'az://my-container/my-table-with-auth' ); Features While the delta extension is still experimental, many (scanning) features and optimizations are already supported: multithreaded scans and Parquet metadata reading data skipping/filter p...ups in file (based on Parquet metadata) skipping complete files (based on Delta partition information) projection pushdown scanning tables with deletion vectors all primitive types structs S3 support with secrets More optimizations are going to be releas... - https://man.mtool.work/duckdb/1.3/core_extensions/delta.html
- Julia Client – DuckDB 9582
- This page is for DuckDB 1.3, which is outdated. Switch to the current documentation . Search Shortcut cmd + k | ctrl + k Installation Documentation Getting Started Connect Overview Concurrency Data Import Overview Data Sources CSV Files Ove
...() . Instead they can be run with DuckDB.query() instead of DuckDB.execute() and will always return a materialized result. Scanning DataFrames The DuckDB Julia package also provides support for querying Julia DataFrames. Note that the DataFrames are dire...© 2026 DuckDB Foundation, Amsterdam NL DuckDB Home Code of Conduct Trademark Use Blog In this article Installation Basics Scanning DataFrames Appender API Concurrency Original Julia Connector... - https://man.mtool.work/duckdb/1.3/clients/julia.html
- Iceberg Extension – DuckDB 9314
- 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
...rg_data.zip file and unzip it. Common Parameters Parameter Type Default Description allow_moved_paths BOOLEAN false Allows scanning Iceberg tables that are moved metadata_compression_codec VARCHAR '' Treats metadata files as when set to 'gzip' snapshot_f...ths = true ); count_star() 51793 The allow_moved_paths option ensures that some path resolution is performed, which allows scanning Iceberg tables that are moved. You can also address specify the current manifest directly in the query, this may be resolv... - https://man.mtool.work/duckdb/1.3/core_extensions/iceberg/overview.html
- Hugging Face Support – DuckDB 7937
- 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
...This is a special branch where Hugging Face automatically generates the Parquet files of every dataset to enable efficient scanning. Authentication Configure your Hugging Face Token in the DuckDB Secrets Manager to access private or gated datasets. First... - https://man.mtool.work/duckdb/1.3/core_extensions/httpfs/hugging_face.html
- Indexing – DuckDB 7937
- 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 sorting queries. ART Index Scans ART index scans probe a single-column ART index for the requested data instead of scanning a table sequentially. Probing can improve the performance of some queries. DuckDB will try to use an index scan for equali... - https://man.mtool.work/duckdb/1.3/guides/performance/indexing.html
- SQL on Apache Arrow – DuckDB 7937
- 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
...w Dataset my_arrow_dataset = ds . dataset ( str ( base_path / 'parquet_folder/' )) # define the filter to be applied while scanning # equivalent to "WHERE i = 2" scanner_filter = ( pc . field ( "i" ) == pc . scalar ( 2 )) arrow_scanner = ds . Scanner . f... - https://man.mtool.work/duckdb/1.3/guides/python/sql_on_arrow.html
- PostgreSQL Extension – DuckDB 7669
- This page is for DuckDB 1.3, which is outdated. Switch to the current documentation . Search Shortcut cmd + k | ctrl + k Installation Documentation Getting Started Connect Overview Concurrency Data Import Overview Data Sources CSV Files Ove
...writing NULL bytes to Postgres, replace them with the given character NULL pg_use_ctid_scan Whether or not to parallelize scanning using table ctids true Schema Cache To avoid having to continuously fetch schema data from PostgreSQL, DuckDB keeps schema... - https://man.mtool.work/duckdb/1.3/core_extensions/postgres.html
- R-Tree Indexes – DuckDB 7669
- 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
...kDB in disk-backed mode), but they are currently never unloaded unless the index is dropped. This means that if you end up scanning the entire index, the entire index will be loaded into memory and stay there for the duration of the database connection.... - https://man.mtool.work/duckdb/1.3/core_extensions/spatial/r-tree_indexes.html
- Reading Faulty CSV Files – DuckDB 7669
- 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
...or By default, when performing a CSV read, if any structural errors are encountered, the scanner will immediately stop the scanning process and throw the error to the user. These errors are designed to provide as much information as possible to allow use... - https://man.mtool.work/duckdb/1.3/data/csv/reading_faulty_csv_files.html
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