Added support for writing simple types nullable columns into parquet

[norberttech]

Change Log

Added

• Added support for writing simple types nullable columns into parquet

Fixed

Changed

Removed

Deprecated

Security

---

Description

Ref: #575

Writing nullable nested columns is still not working as expected, but it will be fixed in the next PR.

[github-actions]

Flow PHP - Benchmarks

^{_{Results of the benchmarks from this PR are compared with the results from 1.x branch.}}

Extractors

+-----------------------+-------------------+------+-----+-----------+-----------+
| benchmark             | subject           | revs | its | mem_peak  | mode      |
+-----------------------+-------------------+------+-----+-----------+-----------+
| AvroExtractorBench    | bench_extract_10k | 5    | 3   | 44.122mb  | 488.008ms |
| CSVExtractorBench     | bench_extract_10k | 5    | 3   | 14.007mb  | 415.672ms |
| JsonExtractorBench    | bench_extract_10k | 5    | 3   | 18.669mb  | 830.575ms |
| ParquetExtractorBench | bench_extract_10k | 5    | 3   | 237.792mb | 1.110s    |
| TextExtractorBench    | bench_extract_10k | 5    | 3   | 7.277mb   | 15.757ms  |
| XmlExtractorBench     | bench_extract_10k | 5    | 3   | 7.624mb   | 686.782ms |
+-----------------------+-------------------+------+-----+-----------+-----------+

Transformers

+-----------------------------+--------------------------+------+-----+-----------------+------------------+
| benchmark                   | subject                  | revs | its | mem_peak        | mode             |
+-----------------------------+--------------------------+------+-----+-----------------+------------------+
| RenameEntryTransformerBench | bench_transform_10k_rows | 5    | 5   | 87.062mb -0.00% | 67.279ms -12.61% |
+-----------------------------+--------------------------+------+-----+-----------------+------------------+

Loaders

+--------------------+----------------+------+-----+-----------+-----------+
| benchmark          | subject        | revs | its | mem_peak  | mode      |
+--------------------+----------------+------+-----+-----------+-----------+
| AvroLoaderBench    | bench_load_10k | 5    | 3   | 219.956mb | 778.149ms |
| CSVLoaderBench     | bench_load_10k | 5    | 3   | 47.140mb  | 78.087ms  |
| JsonLoaderBench    | bench_load_10k | 5    | 3   | 88.580mb  | 78.208ms  |
| ParquetLoaderBench | bench_load_10k | 5    | 3   | 281.200mb | 1.121s    |
| TextLoaderBench    | bench_load_10k | 5    | 3   | 16.566mb  | 41.067ms  |
+--------------------+----------------+------+-----+-----------+-----------+

Building Blocks

+-------------------------+-----------------------+------+-----+----------+-----------+
| benchmark               | subject               | revs | its | mem_peak | mode      |
+-------------------------+-----------------------+------+-----+----------+-----------+
| RowsBench               | bench_chunk_10_on_10k | 5    | 5   | 57.617mb | 4.011ms   |
| RowsBench               | bench_drop_100_on_10k | 5    | 5   | 57.617mb | 5.976ms   |
| NativeEntryFactoryBench | bench_10k_rows        | 5    | 5   | 83.921mb | 160.241ms |
| NativeEntryFactoryBench | bench_1k_rows         | 5    | 5   | 45.430mb | 15.520ms  |
| NativeEntryFactoryBench | bench_5k_rows         | 5    | 5   | 62.716mb | 80.092ms  |
+-------------------------+-----------------------+------+-----+----------+-----------+