Posts tagged sed

mysql: extract table dump from database dump

posted on 2016-08-10 09:08

Usually complete databases are dumped via mysqldump so you get a consistent backup. Dumping table after single table would only work if the database were made read-only during the backup, and is too much of a hazzle normally.

To restore a single table but not the whole database, the regular approach is to restore the dump to new database, and only dump the table you need.

However with huge dumps like 1GB and bigger this becomes cumbersome. Since a mysql dump are just all the SQL statements in plaintext, you can easily strip all other information via sed from the dump file:

sed -n -e "/DROP TABLE.*`my_table_i_want`/,/UNLOCK TABLES/p" mysql_dump_file.sql > my_table_i_want.sql

This will restore all necessary information for the table my_table_i_want from the dumpfile mysql_dump_file.sql into file my_table_i_want.sql.

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