Evaluate the row element by ruby code
- Plugin type: filter
- eval_columns: (array)
- The ruby code to be evaluated for each element
- out_columns: (array)
- The column to be output from the input columns
$ embulk gem install embulk-filter-eval
$ embulk example
$ embulk guess embulk-example/example.yml -o config.yml
$ embulk preview config.yml
+---------+--------------+-------------------------+-------------------------+----------------------------+
| id:long | account:long | time:timestamp | purchase:timestamp | comment:string |
+---------+--------------+-------------------------+-------------------------+----------------------------+
| 1 | 32,864 | 2015-01-27 19:23:49 UTC | 2015-01-27 00:00:00 UTC | embulk |
| 2 | 14,824 | 2015-01-27 19:01:23 UTC | 2015-01-27 00:00:00 UTC | embulk jruby |
| 3 | 27,559 | 2015-01-28 02:20:02 UTC | 2015-01-28 00:00:00 UTC | Embulk "csv" parser plugin |
| 4 | 11,270 | 2015-01-29 11:54:36 UTC | 2015-01-29 00:00:00 UTC | NULL |
+---------+--------------+-------------------------+-------------------------+----------------------------+
config.yml as follows
filters:
- type: eval
eval_columns:
- id: value + 1
- account:
- time: Time.now
- comment: "'Eval is Evil! ' + value"value is an element of the column.
Such as sample, output will be this.
+---------+--------------+-----------------------------+-------------------------+------------------------------------------+
| id:long | account:long | time:timestamp | purchase:timestamp | comment:string |
+---------+--------------+-----------------------------+-------------------------+------------------------------------------+
| 2 | 32,864 | 2015-03-13 13:20:18.753 UTC | 2015-01-27 00:00:00 UTC | Eval is Evil! embulk |
| 3 | 14,824 | 2015-03-13 13:20:18.754 UTC | 2015-01-27 00:00:00 UTC | Eval is Evil! embulk jruby |
| 4 | 27,559 | 2015-03-13 13:20:18.755 UTC | 2015-01-28 00:00:00 UTC | Eval is Evil! Embulk "csv" parser plugin |
| 5 | 11,270 | 2015-03-13 13:20:18.756 UTC | 2015-01-29 00:00:00 UTC | Eval is Evil! NULL |
+---------+--------------+-----------------------------+-------------------------+------------------------------------------+
$ rake
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