Gabor Szadovszky created PARQUET-1985:
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Summary: Improve integration tests between implementations
Key: PARQUET-1985
URL: https://issues.apache.org/jira/browse/PARQUET-1985
Project: Parquet
Issue Type: Test
Components: parquet-testing
Environment:
{noformat}
*no* further _formatting_ is done here
{noformat}
Reporter: Gabor Szadovszky
We have a lack of proper integration tests between components. Fortunately, we
already have a git repository to upload test data:
https://github.com/apache/parquet-testing.
The idea is the following.
Create a directory structure for the different versions of the implementations
containing parquet files with defined data. The structure definition shall be
self-descriptive so we can write integration tests that reads the whole
structure automatically and also works with files to be added later.
The following directory structure is an example for the previous requirements:
{noformat}
test-data/
├── basic-data.csv
├── basic-data.schema
├── impala
│ ├── 3.2.0
│ │ └── basic-data.parquet
│ ├── 3.3.0
│ │ └── basic-data.parquet
│ └── 3.4.0
│ ├── basic-data.lz4.parquet
│ ├── basic-data.snappy.parquet
│ ├── some-specific-issue-2.parquet
│ ├── some-specific-issue-3.csv
│ ├── some-specific-issue-3_mode1.parquet
│ ├── some-specific-issue-3_mode2.parquet
│ └── some-specific-issue-3.schema
├── parquet-cpp
│ ├── 1.5.0
│ │ ├── basic-data.lz4.parquet
│ │ └── basic-data.parquet
│ └── 1.6.0
│ ├── basic-data.lz4.parquet
│ └── some-specific-issue-2.parquet
├── parquet-mr
│ ├── 1.10.2
│ │ └── basic-data.parquet
│ ├── 1.11.1
│ │ ├── basic-data.parquet
│ │ └── some-specific-issue-1.parquet
│ ├── 1.12.0
│ │ ├── basic-data.br.parquet
│ │ ├── basic-data.lz4.parquet
│ │ ├── basic-data.snappy.parquet
│ │ ├── basic-data.zstd.parquet
│ │ ├── some-specific-issue-1.parquet
│ │ └── some-specific-issue-2.parquet
│ ├── some-specific-issue-1.csv
│ └── some-specific-issue-1.schema
├── some-specific-issue-2.csv
└── some-specific-issue-2.schema
{noformat}
Parquet files are created at leaf level. The expected data is saved in a csv
format (to be specified: separators, how to save binary etc.), the expected
schema (to specify the data types independently from the parquet files) are
saved in .schema files. The csv and schema files can be saved on the same level
of the parquet files or upper levels if they are common to several parquet
files.
Any comments about the idea are welcomed.
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