Extracts
Read from various data sources.
Transforms
Shape and optimize for your needs.
Loads
Store and secure in one of many available data sinks.
Examples:
Code
<?php
declare(strict_types=1);
use function Flow\ETL\DSL\{data_frame, from_rows, int_entry, lit, ref, row, rows, to_stream, when};
require __DIR__ . '/../../../autoload.php';
data_frame()
->read(from_rows(rows(
row(int_entry('id', 1), int_entry('value', 1)),
row(int_entry('id', 2), int_entry('value', 1)),
row(int_entry('id', 3), int_entry('value', null)),
row(int_entry('id', 4), int_entry('value', 1)),
row(int_entry('id', 5), int_entry('value', null)),
)))
->withEntry(
'value',
when(ref('value')->isNull(), then: lit(0))
)
->write(to_stream(__DIR__ . '/output.txt', truncate: false))
->run();
Output
+----+-------+
| id | value |
+----+-------+
| 1 | |
| 2 | |
| 3 | 0 |
| 4 | |
| 5 | 0 |
+----+-------+
5 rows
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