BendSQL

Databend Native Client in Rust

Components

core: Databend RestAPI rust client
driver: Databend unified SQL client for RestAPI and FlightSQL
cli: Databend native CLI

Installation for BendSQL

Cargo:

cargo install bendsql

Homebrew:

brew install databendcloud/homebrew-tap/bendsql

Apt:

sudo curl -L -o /usr/share/keyrings/datafuselabs-keyring.gpg https://repo.databend.rs/deb/datafuselabs.gpg
sudo curl -L -o /etc/apt/sources.list.d/datafuselabs.list https://repo.databend.rs/deb/datafuselabs.list

# or using DEB822-STYLE format in Ubuntu-22.04/Debian-12 and later
# sudo curl -L -o /etc/apt/sources.list.d/datafuselabs.sources https://repo.databend.rs/deb/datafuselabs.sources

sudo apt update

sudo apt install bendsql

Binary: check for latest release here

Usage

❯ bendsql --help
Databend Native Command Line Tool

Usage: bendsql [OPTIONS]

Options:
      --help                     Print help information
      --flight                   Using flight sql protocol
      --tls                      Enable TLS
  -h, --host <HOST>              Databend Server host, Default: 127.0.0.1
  -P, --port <PORT>              Databend Server port, Default: 8000
  -u, --user <USER>              Default: root
  -p, --password <PASSWORD>      [env: BENDSQL_PASSWORD=]
  -D, --database <DATABASE>      Database name
      --set <SET>                Settings
      --dsn <DSN>                Data source name [env: BENDSQL_DSN=]
  -n, --non-interactive          Force non-interactive mode
  -q, --query <QUERY>            Query to execute
  -d, --data <DATA>              Data to load, @file or @- for stdin
  -f, --format <FORMAT>          Data format to load [default: csv] [possible values: csv, tsv, ndjson, parquet, xml]
      --format-opt <FORMAT_OPT>  Data format options
  -o, --output <OUTPUT>          Output format [possible values: table, csv, tsv, null]
      --progress                 Show progress for query execution in stderr, only works with output format `table` and `null`.
      --stats                    Show stats after query execution in stderr, only works with non-interactive mode.
      --time                     Only show execution time without results, will implicitly set output format to `null`.
  -V, --version                  Print version

Custom configuration

By default bendsql will read configuration from ~/.bendsql/config.toml and ~/.config/bendsql/config.toml sequentially if exists.

Example file

❯ cat ~/.bendsql/config.toml
[connection]
connect_timeout = "30s"


[settings]
display_pretty_sql = true
progress_color = "green"
expand = "auto"
prompt = ":) "

Connection section

Parameter	Description
`host`	Server host to connect.
`port`	Server port to connect.
`user`	User name.
`database`	Which database to connect.
`args`	Additional connection args.

Settings section

Parameter	Description
`display_pretty_sql`	Whether to display SQL queries in a formatted way.
`prompt`	The prompt to display before asking for input.
`progress_color`	The color to use for the progress bar.
`show_progress`	Whether to show a progress bar when executing queries.
`show_stats`	Whether to show statistics after executing queries.
`max_display_rows`	The maximum number of rows to display in table output format.
`max_width`	Limit display render box max width, 0 means default to the size of the terminal.
`max_col_width`	Limit display render each column max width, smaller than 3 means disable the limit.
`output_format`	The output format to use.
`expand`	Expand table format display, default off, could be on/off/auto.
`time`	Whether to show the time elapsed when executing queries.
`multi_line`	Whether to allow multi-line input.
`replace_newline`	whether replace '\n' with '\\n'.

Control commands in REPL

We can use .CMD_NAME VAL to update the Settings above in runtime, example:

❯ bendsql

:) .display_pretty_sql false
:) .max_display_rows 10
:) .expand auto

DSN

Format:

databend[+flight]://user:[password]@host[:port]/[database][?sslmode=disabled][&arg1=value1]

Examples:

databend://root:@localhost:8000/?sslmode=disable
databend://user1:password1@tnxxxx--default.gw.aws-us-east-2.default.databend.com:443/benchmark?enable_dphyp=1
databend+flight://root:@localhost:8900/database1?connect_timeout=10

Available Args:

Common:

Arg	Description
`tenant`	Tenant ID, Databend Cloud only.
`warehouse`	Warehouse name, Databend Cloud only.
`sslmode`	Set to `disable` if not using tls.
`tls_ca_file`	Custom root CA certificate path.

RestAPI client:

Arg	Description
`presigned_url_disabled`	Set to `1` to disable presigned upload to object storage, should only be used with local testing environment
`wait_time_secs`	Request wait time for page, default to `1`
`max_rows_in_buffer`	Max rows for page buffer
`max_rows_per_page`	Max response rows for a single page

FlightSQL client:

Arg	Description
`connect_timeout`	Grpc connect timeout seconds
`query_timeout`	Query timeout seconds
`tcp_nodelay`	Default to `true`
`tcp_keepalive`	Tcp keepalive seconds, default to `3600`, set to `0` to disable keepalive
`http2_keep_alive_interval`	Keep alive interval in seconds, default to `300`
`keep_alive_timeout`	Keep alive timeout in seconds, default to `20`
`keep_alive_while_idle`	Default to `true`

Query Settings:

see: Databend Query Settings

Development

Cargo fmt, clippy, audit

make check

Unit tests

make test

integration tests

Note: Docker and Docker Compose needed

make integration

flaneur2020/bendsql