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Embulk 0.8.9で追加されたdateオプション

Posted at

まとめ

  • Embulk 0.8.9から、時刻のみのカラムに日付を指定できるようになった。
  • デフォルトの日付を指定するときは、default_date
  • カラム毎に指定するには、date
  • タイムゾーン指定を忘れずに

サンプルデータ

次のようなデータがある、3番目のカラムは19:23:49のような時刻形式

id,account,time,comment
1,32864,19:23:49,embulk
2,14824,19:01:23,embulk jruby
3,27559,02:20:02,"Embulk ""csv"" parser plugin"
4,11270,11:54:36,NULL

default_date, dateを使わない場合

  parser:
    charset: UTF-8
    newline: CRLF
    type: csv
    delimiter: ','
    quote: '"'
    escape: '"'
    null_string: 'NULL'
    trim_if_not_quoted: false
    skip_header_lines: 1
    allow_extra_columns: false
    allow_optional_columns: false
    columns:
    - {name: id, type: long}
    - {name: account, type: long}
    - {name: time, type: timestamp, format: "%H:%M:%S" }
    - {name: comment, type: string}
*************************** 1 ***************************
     id (     long) : 1
account (     long) : 32,864
   time (timestamp) : 1970-01-01 19:23:49 UTC
comment (   string) : embulk

日付は、1970/1/1になる。

default_dateを使う場合

  parser:
    charset: UTF-8
    newline: CRLF
    type: csv
    delimiter: ','
    quote: '"'
    escape: '"'
    null_string: 'NULL'
    trim_if_not_quoted: false
    skip_header_lines: 1
    allow_extra_columns: false
    allow_optional_columns: false 
    default_date: "2016-07-22" # 追加
    default_timezone: "Asia/Tokyo" # 追加
    columns:
    - {name: id, type: long}
    - {name: account, type: long}
    - {name: time, type: timestamp, format: "%H:%M:%S" }
    - {name: comment, type: string}

previewすると、最初の日付が、2016/07/22 10:23:49(UTC)になっていることが確認できた。(日本時間は9時間先になる)

*************************** 1 ***************************
     id (     long) : 1
account (     long) : 32,864
   time (timestamp) : 2016-07-22 10:23:49 UTC
comment (   string) : embulk

個別に指定する場合は、date

  parser:
    charset: UTF-8
    newline: CRLF
    type: csv
    delimiter: ','
    quote: '"'
    escape: '"'
    null_string: 'NULL'
    trim_if_not_quoted: false
    skip_header_lines: 1
    allow_extra_columns: false
    allow_optional_columns: false
    default_timezone: "Asia/Tokyo"
    columns:
    - {name: id, type: long}
    - {name: account, type: long}
    - {name: time, type: timestamp, format: "%H:%M:%S", date: "2016-07-22" }
    - {name: comment, type: string}

余談

Embulk 0.8.10が出た日にこの記事を書いたのは、いままでこのプションの存在を知らなかったからだ。:smile:

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