mysql 数据库转储脚本添加功能以跳过转储的数据库

mysql 数据库转储脚本添加功能以跳过转储的数据库

我正在使用以下脚本来转储我的数据库。效果很好。我想添加功能,它首先检查数据库表是否已转储,如果存在转储,则应跳过它并移至下一个表。

DB_host=127.0.0.1
DB_user=root
DB=mydb
DB_pass=mydbpassword
DIR=/

[ -n "$DIR" ] || DIR=.
test -d $DIR || mkdir -p $DIR

echo "Dumping tables into separate SQL command files for database '$DB' into dir=$DIR"

tbl_count=0

for t in $(mysql -NBA -h $DB_host -u $DB_user -p$DB_pass -D $DB -e 'show tables')
do
    echo "DUMPING TABLE: $t"
    mysqldump -h $DB_host -u $DB_user -p$DB_pass $DB $t  > $DIR/$t.sql
    (( tbl_count++ ))
done

echo "$tbl_count tables dumped from database '$DB' into dir=$DIR"

答案1

更改此代码块:

echo "DUMPING TABLE: $t"
mysqldump -h $DB_host -u $DB_user -p$DB_pass $DB $t  > $DIR/$t.sql
(( tbl_count++ ))

对此:

echo "DUMPING TABLE: $t"
if [ -e "$DIR/$t.sql" ]; then
  echo "TABLE $DIR/$t.sql exists, skipping..."
else
  mysqldump -h $DB_host -u $DB_user -p$DB_pass $DB $t  > $DIR/$t.sql
fi
(( tbl_count++ ))

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