hudi - ClickHouse Documentation

Provides a read-only table-like interface to Apache Hudi tables in Amazon S3.

Syntax

hudi(url [,aws_access_key_id, aws_secret_access_key] [,format] [,structure] [,compression] [,extra_credentials])

Argument	Description
`url`	Bucket url with the path to an existing Hudi table in S3.
`aws_access_key_id`, `aws_secret_access_key`	Long-term credentials for the AWS account user. You can use these to authenticate your requests. These parameters are optional. If credentials are not specified, they are used from the ClickHouse configuration. For more information see Using S3 for Data Storage.
`format`	The format of the file.
`structure`	Structure of the table. Format `'column1_name column1_type, column2_name column2_type, ...'`.
`compression`	Parameter is optional. Supported values: `none`, `gzip/gz`, `brotli/br`, `xz/LZMA`, `zstd/zst`. By default, compression will be autodetected by the file extension.
`extra_credentials`	Parameter is optional. Used to pass a `role_arn` for role-based access in ClickHouse Cloud. See Secure S3 for configuration steps.

A table with the specified structure for reading data in the specified Hudi table in S3.

_path — Path to the file. Type: LowCardinality(String).
_file — Name of the file. Type: LowCardinality(String).
_size — Size of the file in bytes. Type: Nullable(UInt64). If the file size is unknown, the value is NULL.
_time — Last modified time of the file. Type: Nullable(DateTime). If the time is unknown, the value is NULL.
_etag — The etag of the file. Type: LowCardinality(String). If the etag is unknown, the value is NULL.