Crate ballista_cli

source ·
Expand description

Ballista Command-line Interface

Ballista is a distributed query execution framework, written in Rust, that uses Apache Arrow as its in-memory format.

The Ballista CLI allows SQL queries to be executed by an in-process DataFusion context, or by a distributed Ballista context.

ⓘ
USAGE:
    ballista-cli [FLAGS] [OPTIONS]

FLAGS:
    -h, --help       Prints help information
    -q, --quiet      Reduce printing other than the results and work quietly
    -V, --version    Prints version information

OPTIONS:
    -c, --batch-size <batch-size>    The batch size of each query, or use DataFusion default
    -p, --data-path <data-path>      Path to your data, default to current directory
    -f, --file <file>...             Execute commands from file(s), then exit
        --format <format>            Output format [default: table]  [possible values: csv, tsv, table, json, ndjson]
        --host <host>                Ballista scheduler host
        --port <port>                Ballista scheduler port

Example

Create a CSV file to query.

$ echo "1,2" > data.csv

$ ballista-cli

Ballista CLI v0.6.0

> CREATE EXTERNAL TABLE foo (a INT, b INT) STORED AS CSV LOCATION 'data.csv';
0 rows in set. Query took 0.001 seconds.

> SELECT * FROM foo;
+---+---+
| a | b |
+---+---+
| 1 | 2 |
+---+---+
1 row in set. Query took 0.017 seconds.

Ballista-Cli

If you want to execute the SQL in ballista by ballista-cli, you must build/compile ballista-cli first.

cd arrow-datafusion/ballista-cli
cargo build

The Ballista CLI can connect to a Ballista scheduler for query execution.

ballista-cli --host localhost --port 50050

Modules

  • command
    Command within CLI
  • exec
    Execution functions
  • functions
    Functions that are query-able and searchable via the \h command
  • helper
    Helper that helps with interactive editing, including multi-line parsing and validation, and auto-completion for file name during creating external table.
  • print_format
    Print format variants
  • print_options

Constants