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CSVファイルをSQL結果風に表示するシェルスクリプト

Posted at

このシェルスクリプトを作った経緯は割愛します。

CSVをSQLのテーブルみたいに変換するだけのシェルスクリプトです。(中身ほぼawkです…)

csv_parse_sqldisplay.sh
#!/bin/bash

cat $1 | LANG=C awk -F, '
{
    column_max_length[NF]
    # NF=列数
    # NR=行数
    data[0][NF]

    for (col_num=1; col_num<=NF; col_num++) {
        data[NR][col_num] = $col_num
    }

    if (NR == 1) {
        for (i=1; i<=NF; i++) {
            column_max_length[i] = 0;
        }
    }

    for(i=1; i<=NF; i++) {
        if (length($i) >= column_max_length[i]) {
            column_max_length[i] = length($i)
        }
    }
}
function separator() {
    printf("%s","+")
    for (m in column_max_length) {
        for (j=0; j<column_max_length[m]+2; j++) {
            printf("%s","-")
        }
        printf("%s","+")
    }
    print("")
}
END {
    for (row=1; row<=NR; row++) {
        if (row == 1 || row == 2) {
            separator()
        }
        for (col=1; col<=NF; col++) {
            printf("|")
            space_num = column_max_length[col]-length(data[row][col])
            for (x=0; x<space_num; x++) {
                printf("%s"," ")
            }
            printf(" %s ", data[row][col])
        }
        print("|")
    }
    separator()
}
'

【実行方法】
引数にCSVファイルを与えて実行します。
※CSVに全角文字が入ると表示が崩れます。(良い方法があればコメントいただけると大変嬉しいです。)

実行例
[hoge@local: ~]$ sh csv_parse_sqldisplay.sh test_data.csv
+----+-------------+------------------+---------------+----------------------+--------------------+
| id | postal_code | prefectures_code |  phone_number |                email |          date_time |
+----+-------------+------------------+---------------+----------------------+--------------------+
|  1 |    855-0151 |               18 | 080-3454-3698 |   OK_LI5@example.com | 2012/5/14 23:24:45 |
|  2 |    884-9283 |               14 | 080-5785-8416 |     w4dIMm6@test.com |   1976/9/9 9:12:50 |
|  3 |    105-8176 |               08 | 080-6521-4194 |       i7z6FM@test.jp |  2013/6/17 0:42:10 |
|  4 |    946-3408 |               11 | 090-0974-2227 |   GmeWUoL@sample.org |  2006/6/4 18:54:44 |
|  5 |    540-4290 |               22 | 090-9204-0243 |    PiLueGZht@test.jp | 2001/7/14 15:59:58 |
|  6 |    608-6516 |               14 | 080-2702-9315 | T1siLNEbc@example.jp | 1980/7/14 18:36:40 |
|  7 |    077-4354 |               31 | 090-6172-4143 |      mLgwOL@test.com | 2008/5/12 20:48:12 |
|  8 |    139-6143 |               04 | 090-5286-6431 |    jMzp9O21@test.net | 1993/2/20 23:46:50 |
|  9 |    098-3460 |               41 | 080-5108-5681 |     bMnYW@sample.com | 1992/6/13 17:52:03 |
| 10 |    354-5744 |               02 | 090-8018-7223 |   Ipcjl@sample.co.jp |  2016/5/8 20:26:07 |
+----+-------------+------------------+---------------+----------------------+--------------------+
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