JSON to Arrow

Convert JSON files to Apache Arrow. This package is part of Arrow CLI tools.

Installation

Download prebuilt binaries

You can get the latest releases from https://github.com/domoritz/arrow-tools/releases.

With Cargo

cargo install json2arrow

With Cargo B(inary)Install

To avoid re-compilation and speed up installation, you can install this tool with cargo binstall:

cargo binstall json2arrow

Usage

``` Usage: json2arrow [OPTIONS] [ARROW]

Arguments: Input JSON file, stdin if not present [ARROW] Output file, stdout if not present

Options: -s, --schema-file File with Arrow schema in JSON format -m, --max-read-records The number of records to infer the schema from. All rows if not present. Setting max-read-records to zero will stop schema inference and all columns will be string typed -p, --print-schema Print the schema to stderr -n, --dry Only print the schema -h, --help Print help -V, --version Print version ```

The --schema-file option uses the same file format as --dry and --print-schema.

Limitations

Since we use the Arrow JSON loader, we are limited to what it supports. Right now, it supports JSON line-delimited files.

json { "a": 42, "b": true } { "a": 12, "b": false } { "a": 7, "b": true }