feat: compression info in schema subcommand

[SteveLauC]

What does this PR do

1. Add compression information to pqrs schema -D

   $ pqrs cat 1.parquet
   
   ###############
   File: 1.parquet
   ###############
   
   {age: 18, name: "steve", timestamp: 0}
   
   $ ./target/debug/pqrs schema 1.parquet -D
   ...
   column 0:
   --------------------------------------------------------------------------------
   column type: INT64
   column path: "age"
   encodings: PLAIN RLE
   file path: N/A
   file offset: 57
   num of values: 1
   compression: UNCOMPRESSED
   total compressed size (in bytes): 53
   total uncompressed size (in bytes): 53
   data page offset: 4
   index page offset: N/A
   dictionary page offset: N/A
   statistics: {min: 18, max: 18, distinct_count: N/A, null_count: 0, min_max_deprecated: false}
   bloom filter offset: N/A
   offset index offset: 423
   offset index length: 10
   column index offset: 336
   column index length: 31
   
   column 1:
   --------------------------------------------------------------------------------
   column type: BYTE_ARRAY
   column path: "name"
   encodings: PLAIN RLE
   file path: N/A
   file offset: 170
   num of values: 1
   compression: UNCOMPRESSED
   total compressed size (in bytes): 48
   total uncompressed size (in bytes): 48
   data page offset: 122
   index page offset: N/A
   dictionary page offset: N/A
   statistics: {min: [115, 116, 101, 118, 101], max: [115, 116, 101, 118, 101], distinct_count: N/A, null_count: 0, min_max_deprecated: false}
   bloom filter offset: N/A
   offset index offset: 433
   offset index length: 11
   column index offset: 367
   column index length: 25
   
   column 2:
   --------------------------------------------------------------------------------
   column type: INT64
   column path: "timestamp"
   encodings: PLAIN RLE
   file path: N/A
   file offset: 264
   num of values: 1
   compression: UNCOMPRESSED
   total compressed size (in bytes): 53
   total uncompressed size (in bytes): 53
   data page offset: 211
   index page offset: N/A
   dictionary page offset: N/A
   statistics: {min: 0, max: 0, distinct_count: N/A, null_count: 0, min_max_deprecated: false}
   bloom filter offset: N/A
   offset index offset: 444
   offset index length: 11
   column index offset: 392
   column index length: 31

Closes #40

[manojkarthick]

Thanks a lot @SteveLauC - will try and get a release out tonight!

[SteveLauC]

Thanks a lot @SteveLauC - will try and get a release out tonight!

That would be great, but I remember that crate with git dependencies is not allowed to be published to crates.io, so I guess we still need to wait for the release of 40.0.0:(

[manojkarthick]

That’s true yeah. I’ve released it using homebrew and also created prebuilt binaries for various platforms/architectures, so that’s something I suppose :)