2016-07-17 00:46



I am facing a problem while writing a shell script. i have table in a database where there is a text field.. i need to write that field into a file.

database fields are id, file_name, text

here is my script

while read -a row
cat <<EOF >/root/${row[1]}
sleep 1
done < <(echo "SELECT * FROM installation WHERE status = 1" | mysql -h -u root -padmin -D data -s)

I have tried with

echo "${row[2]}" > /root/${row[1]}

But its writing the 1st line only, but the text field is multiline text and i need write full text in that file

please help

  • 点赞
  • 写回答
  • 关注问题
  • 收藏
  • 复制链接分享
  • 邀请回答


  • doudi7782 doudi7782 5年前

    By default read -r row will do word splitting by space/tab/new-line. Because the text field from table contains new-lines, word splitting would cut your text result. In this situation it's hard to avoid it.

    I recommend you should replace the new-line to another mark, e.g. ### or just new-line, using REPLACE(text, " ", 'new-line')(I am not familiar with sql REPlACE function) in SQL, then get result from shell, then use ${row[2]//new-line/$' '} to convert the new-line back.

    点赞 评论 复制链接分享