DSL · Parquet

from_parquet

Definition

/**
 * @param Path|string $path
 * @param array<string> $columns - list of columns to read from parquet file - @deprecated use `withColumns` method instead
 * @param Options $options - @deprecated use `withOptions` method instead
 * @param ByteOrder $byte_order - @deprecated use `withByteOrder` method instead
 * @param null|int $offset - @deprecated use `withOffset` method instead
 */
from_parquet(Path|string $path, array $columns, Options $options, ByteOrder $byte_order, ?int $offset) : ParquetExtractor

Usage examples

Data frame · Data reading

<?php

declare(strict_types=1);

use function Flow\ETL\Adapter\Parquet\from_parquet;
use function Flow\ETL\DSL\{data_frame, to_output};

require __DIR__ . '/vendor/autoload.php';

data_frame()
    ->read(from_parquet(
        __DIR__ . '/input/dataset.parquet',
    ))
    ->collect()
    ->write(to_output(truncate: false))
    ->run();

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