parquet2json

A command-line tool for converting Parquet to newline-delimited JSON.

It uses the excellent Apache Parquet Official Native Rust Implementation.

How to use it

Install from crates.io and execute from the command line, e.g.:

```shell $ cargo install parquet2json $ parquet2json --help

USAGE: parquet2json [OPTIONS]

ARGS: Location of Parquet input file (path, HTTP or S3 URL)

FLAGS: -h, --help Prints help information -V, --version Prints version information

OPTIONS: -l, --limit Maximum number of rows to output -o, --offset Starts outputting from this row ```

S3 Settings

Credentials are provided as per standard AWS toolchain, i.e. per environment variables (AWS_ACCESS_KEY_ID and AWS_SECRET_ACCESS_KEY), AWS credentials file or IAM ECS container/instance profile.

The default AWS region must be set per environment variable (AWS_DEFAULT_REGION) o in AWS credentials file and must match region of the bucket the bucket is located in.

Examples

Use it to stream output to files and other tools such as grep and jq.

Output to a file

shell $ parquet2json ./myfile.pq > output.ndjson

Filter with jq

shell $ parquet2json ./myfile.pq | jq 'select(.level==3) | .id'

From S3 or HTTP (S3)

shell $ parquet2json s3://amazon-reviews-pds/parquet/product_category=Gift_Card/part-00000-495c48e6-96d6-4650-aa65-3c36a3516ddd.c000.snappy.parquet

shell $ parquet2json https://amazon-reviews-pds.s3.us-east-1.amazonaws.com/parquet/product_category%3DGift_Card/part-00000-495c48e6-96d6-4650-aa65-3c36a3516ddd.c000.snappy.parquet

License

MIT