Convert JSON files to Apache Parquet. You may also be interested in csv2parquet, json2arrow, or csv2arrow.
You can get the latest releases from https://github.com/domoritz/json2parquet/releases/.
cargo install json2parquet
Usage: json2parquet [OPTIONS] <JSON> <PARQUET>
Arguments:
<JSON> Input JSON file
<PARQUET> Output file
Options:
-s, --schema-file <SCHEMA_FILE>
File with Arrow schema in JSON format
--max-read-records <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
-c, --compression <COMPRESSION>
Set the compression [possible values: uncompressed, snappy, gzip, lzo, brotli, lz4, zstd]
-e, --encoding <ENCODING>
Sets encoding for any column [possible values: plain, rle, bit-packed, delta-binary-packed, delta-length-byte-array, delta-byte-array, rle-dictionary]
--data-pagesize-limit <DATA_PAGESIZE_LIMIT>
Sets data page size limit
--dictionary-pagesize-limit <DICTIONARY_PAGESIZE_LIMIT>
Sets dictionary page size limit
--write-batch-size <WRITE_BATCH_SIZE>
Sets write batch size
--max-row-group-size <MAX_ROW_GROUP_SIZE>
Sets max size for a row group
--created-by <CREATED_BY>
Sets "created by" property
--dictionary
Sets flag to enable/disable dictionary encoding for any column
--statistics <STATISTICS>
Sets flag to enable/disable statistics for any column [possible values: none, chunk, page]
--max-statistics-size <MAX_STATISTICS_SIZE>
Sets max statistics size for any column. Applicable only if statistics are enabled
-p, --print-schema
Print the schema to stderr
-n, --dry
Only print the schema
-h, --help
Print help information
-V, --version
Print version information
The --schema-file option uses the same file format as --dry and --print-schema.
Since we use the Arrow JSON loader, we are limited to what it supports. Right now, it supports JSON line-delimited files.
{ "a": 42, "b": true }
{ "a": 12, "b": false }
{ "a": 7, "b": true }