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Azure Extension 12644
The azure extension lets DuckDB read and write files in Azure Blob Storage and Azure Data Lake Storage (ADLS) Gen2. Installing and Loading The azure extension will be transparently autoloaded on first use from the official extension reposit ... e as follows: Azure Blob Storage Allowed URI schemes: az or azure SELECT count(*) FROM 'az://⟨my_container⟩/⟨path⟩/⟨my_file⟩.⟨parquet_or_csv⟩'; Globs are also supported: SELECT * FROM 'az://⟨my_container⟩/⟨path⟩/*.csv'; SELECT * FROM 'az://⟨my_cont ... ainer⟩/⟨path⟩/**'; Or with a fully qualified path syntax: SELECT count(*) FROM 'az://⟨my_storage_account⟩.blob.core.windows.net/⟨my_container⟩/⟨path⟩/⟨my_file⟩.⟨parquet_or_csv⟩'; SELECT * FROM 'az://⟨my_storage_account⟩.blob.core ... Allowed URI schemes: abfss or abfs (both connect over HTTPS) SELECT count(*) FROM 'abfss://⟨my_filesystem⟩/⟨path⟩/⟨my_file⟩.⟨parquet_or_csv⟩'; Globs are also supported: SELECT * FROM 'abfss://⟨my_filesystem⟩/⟨path⟩/*.csv'; SELECT * FROM 'abfss://⟨ ...
https://man.mtool.work/duckdb/2.0/core_extensions/azure.html
S3 API Support 11567
The httpfs extension supports reading/writing/ globbing files on object storage servers using the S3 API. S3 offers a standard API to read and write to remote files (while regular http servers, predating S3, do not offer a common write API) ... If you get an IO Error ( Connection error for HTTP HEAD ), configure the endpoint explicitly via ENDPOINT 's3.⟨your-region⟩.amazonaws.com' . Now, to query using the above secret, simply query any s3:// prefixed file: SELECT * FROM 's3://⟨your-buck ... et⟩/⟨your_file⟩.parquet'; credential_chain Provider The credential_chain provider automatically fetches credentials using the AWS SDK (prof ... lable when using URLs starting with r2:// , for example: SELECT * FROM read_parquet('r2://⟨some-file-that-uses-an-r2-secret⟩.parquet'); GCS Secrets While Google Cloud Storage is accessed by DuckDB using the S3 API, DuckDB has a special Secret type, ...
https://man.mtool.work/duckdb/2.0/core_extensions/httpfs/s3api.html
S3 Parquet Export 11404
To write a Parquet file to S3, the httpfs extension is required. This can be installed using the INSTALL SQL command. This only needs to be run once. INSTALL httpfs; To load the httpfs extension for usage, use the LOAD SQL command: LOAD htt ... If you get an IO Error ( Connection error for HTTP HEAD ), configure the endpoint explicitly via ENDPOINT 's3.⟨your-region⟩.amazonaws.com' . To fetch credentials automatically instead — or to use a named profile, SSO, or an assumed role — see the ... onfigured, Parquet files can be written to S3 using the following command: COPY ⟨table_name⟩ TO 's3://⟨s3-bucket⟩/⟨filename⟩.parquet'; Similarly, Google Cloud Storage (GCS) is supported through the Interoperability API. You need to create HMAC keys ... AMPLEKEY⟩' ); After setting up the GCS credentials, you can export using: COPY ⟨table_name⟩ TO 'gs://⟨gcs_bucket⟩/⟨filename⟩.parquet'; ...
https://man.mtool.work/duckdb/2.0/guides/network_cloud_storage/s3_export.html
Fastly Object Storage Import 9871
Prerequisites For Fastly Object Storage, the S3 Compatibility API allows you to use DuckDB's S3 support to read and write from Fastly buckets. This requires the httpfs extension , which can be installed using the INSTALL SQL command. This o ... NN7EXAMPLE⟩', SECRET '⟨wJalrXUtnFEMI/K7MDENG/bPxRfiCYEXAMPLEKEY⟩', URL_STYLE 'path', REGION '⟨us-east⟩', ENDPOINT '⟨us-east⟩.object.fastlystorage.app' -- see note below ); The ENDPOINT needs to point to the Fastly endpoint for the region you want t ... parquet : SELECT * FROM 's3://⟨fastly-bucket-name⟩/(file).csv'; SELECT * FROM read_parquet('s3://⟨fastly-bucket-name⟩/⟨file⟩.parquet'); ...
https://man.mtool.work/duckdb/2.0/guides/network_cloud_storage/fastly_object_sto...
Tigris Import 9724
Prerequisites For Tigris , the S3-compatible API allows you to use DuckDB's S3 support to read and write from Tigris buckets. This requires the httpfs extension , which can be installed using the INSTALL SQL command. This only needs to be r ... the data using DuckDB's built-in methods, such as read_csv or read_parquet : SELECT * FROM 's3://⟨tigris-bucket-name⟩/⟨file⟩.csv'; SELECT * FROM read_parquet('s3://⟨tigris-bucket-name⟩/⟨file⟩.parquet'); ...
https://man.mtool.work/duckdb/2.0/guides/network_cloud_storage/tigris_import.htm...
Amazon RDS with IAM Authentication 9414
Managed PostgreSQL databases on Amazon RDS and Aurora can authenticate with short-lived IAM tokens instead of a static password. DuckDB supports this through the postgres and aws extensions: the aws extension generates the token from an AWS ... et ( TYPE rds, PROVIDER credential_chain, CHAIN 'env;sso', REGION '⟨eu-west-1⟩', RDS_USER '⟨postgres⟩', RDS_HOST '⟨instance⟩.⟨identifier⟩.⟨region⟩.rds.amazonaws.com', RDS_PORT '5432' ); Then create a secret of type postgres that references it via A ... rated by the rds secret is used (and refreshed) automatically: CREATE SECRET pg_rds_secret ( TYPE postgres, HOST '⟨instance⟩.⟨identifier⟩.⟨region⟩.rds.amazonaws.com', PORT '5432', USER '⟨postgres⟩', DATABASE '⟨postgres⟩', SSLMODE require, AWS_RDS_S ...
https://man.mtool.work/duckdb/2.0/guides/database_integration/rds_iam.html
Files Created by DuckDB 9267
DuckDB creates several files and directories on disk. This page lists both the global and the local ones. Global Files and Directories DuckDB creates the following global files and directories in the user's home directory (denoted with ~ ): ... .duckdb , .db and .ddb . weather.duckdb .tmp/ Temporary directory. Only created in in-memory mode. .tmp/ ⟨database_filename⟩.tmp/ Temporary directory. Only created in on-disk mode. weather.duckdb.tmp/ ⟨database_filename⟩.wal Write-ahead log file. I ...
https://man.mtool.work/duckdb/2.0/operations_manual/footprint_of_duckdb/files_cr...
S3 Express One 8957
In late 2023, AWS announced the S3 Express One Zone , a high-speed variant of traditional S3 buckets. DuckDB can read S3 Express One buckets using the httpfs extension . Credentials and Configuration The configuration of S3 Express One buck ... buckets with one exception: you must specify the endpoint according to the following pattern: s3express-⟨availability_zone⟩.⟨region⟩.amazonaws.com where the ⟨availability_zone⟩ (e.g., use-az5 ) can be obtained from the S3 Express One bucket's conf ... OSFODNN7EXAMPLE⟩', SECRET '⟨wJalrXUtnFEMI/K7MDENG/bPxRfiCYEXAMPLEKEY⟩', REGION '⟨us-east-1⟩', ENDPOINT 's3express-⟨use1-az5⟩.⟨us-east-1⟩.amazonaws.com' ); Instance Location For best performance, ensure the EC2 instance is in the same availability z ...
https://man.mtool.work/duckdb/2.0/guides/network_cloud_storage/s3_express_one.ht...
SeaweedFS Import 8957
Prerequisites For SeaweedFS , the S3-compatible gateway allows you to use DuckDB's S3 support to read and write from SeaweedFS buckets. This requires the httpfs extension , which can be installed using the INSTALL SQL command. This only nee ... query the data using DuckDB's built-in methods, such as read_csv or read_parquet : SELECT * FROM 's3://⟨your-bucket⟩/⟨file⟩.csv'; SELECT * FROM read_parquet('s3://⟨your-bucket⟩/⟨file⟩.parquet'); Writing works the same way, including glob reads ove ...
https://man.mtool.work/duckdb/2.0/guides/network_cloud_storage/seaweedfs_import....
Avro Extension 8500
The avro extension enables DuckDB to read Apache Avro files. The avro extension was released as a community extension in late 2024 and became a core extension in early 2025. The read_avro Function The extension adds a single DuckDB function ... , read_avro . This function can be used like so: FROM read_avro('⟨some_file⟩.avro'); This function will expose the contents of the Avro file as a DuckDB table. You can then use any arbitrary SQL const ... For example: FROM read_avro('https://blobs.duckdb.org/data/userdata1.avro'); FROM read_avro('s3://⟨your-bucket⟩/⟨some_file⟩.avro'); should "just" work. You can also glob multiple files in a single read call or pass a list of files to the functions ...
https://man.mtool.work/duckdb/2.0/core_extensions/avro.html
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