在 bash 中捕获 Mysql 错误

Question

我有一个查询 mysql 的 bash 脚本，我想捕捉错误并回显它。这是我的代码

 mysql --silent -h ${sql_server} -P 3306 -u${USER} -p${MYSQL_PASS} -D${DATABASE} -BNe "$sql_str" | while read -r line
do
    query="$(echo "$line" | cut -f1)"
    database_out="$(echo "$line" | cut -f2)"
    outfile="$(echo "$line" | cut -f3)"
    directory_out="$(echo "$line" | cut -f4)"
    type="$(echo "$line" | cut -f5)"
    host="$(echo "$line" | cut -f6)"
    username="$(echo "$line" | cut -f7)"
    directory_scp="$(echo "$line" | cut -f8)"

    #switch over format types
    case "$type" in 
        csv)
            file_out=$directory_out$outfile"."`date +%Y%m%d`.csv
            mysql -h ${sql_server} -P 3306 -u${USER} -p${MYSQL_PASS} -D${database_out} -e "$query" | sed 's/\t/","/g;s/^/"/;s/$/"/;s/\n//g' > $file_out
            ;;
        xml)
            file_out=$directory_out$outfile`date +%Y%m%d`.xml
            mysql -h ${sql_server} -P 3306 -u${USER} -p${MYSQL_PASS} -D${database_out} -e "$query" -X > $file_out
            ;;
        *)
        echo "["$(timestamp)"] : {ERROR} Invalid output format.  Currently only csv and xml output supported."
        ;;
    esac
    str=$file_out" "$username@$host:$directory_scp  
    echo "["$(timestamp)"] : {NOTIFICATION} Attempting to scp "$outfile" to "$username@$host:$directory_scp" - [Started]"
    scp $str
    echo "["$(timestamp)"] : {NOTIFICATION} scp "$outfile" to "$username@$host:$directory_scp" - [Complete]"

done 

任何想法。我想捕获错误并格式化错误输出。

Answer 1

 result=$(mysql --silent -h ${sql_server} -P 3306 -u${USER} -p${MYSQL_PASS} -D${DATABASE} -BNe "$sql_str")
    if [ $? -ne "0" ]; then
            echo "["$(timestamp)"] : {ERROR} MySQL error thrown in EOD DUMP"
    else
            while read -r line 

                   ...do something