Mysql – Does thesqldump -all-databases include all objects

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Does mysqldump -all-databases include all objects ?

I have to migrate all databases to new server.

Best Answer

No mysqldump -all-databases does not include all objects

mysqldump --help

  -A, --all-databases Dump all the databases. This will be same as --databases
                      with all databases selected.

So mysqldump with --all-databases only dumps all the databases.

In order to migrate all the databases to a new server, you should take a complete backup :

mysqldump an entire mysql instance

mysqldump -h... -u... -p... --events --routines --triggers --all-databases > MySQLData.sql

The drawback is that backups created this way can only be reloaded into the same major release version of mysql that the mysqldump was generated with. In other words, a mysqldump --all-databases from a MySQL 5.0 database cannot be loaded in 5.1 or 5.5. The reason ? The mysql schema is totally different between major releases.

Here is the generic way to dump the SQL Grants for users that is readble and more portable

mysql -h... -u... -p... --skip-column-names -A -e"SELECT CONCAT('SHOW GRANTS FOR ''',user,'''@''',host,''';') FROM mysql.user WHERE user<>''" | mysql -h... -u... -p... --skip-column-names -A | sed 's/$/;/g' > MySQLGrants.sql

Have a look at answer from RolandoMySQLDBA on How can I optimize a mysqldump of a large database ?

Related Solutions

Mysql – Error on import of thesqldump file – Illegal double value found during parsing

There is current open bug report on this one.

The bug report has a suggested work around at the bottom entry [22 Jan 2010 6:46]:

replace 1.79769313486232e+308 \'1.79769313486232e+308\' -- filename

Give it a Try !!!

MySQL – How to Use mysqldump to Ignore Databases for Backup

Back on Dec 16, 2011, I answered the question How do you mysqldump specific table(s)?

I collected all tables not including a certain set of table names.

Using the same principles, you could have collect all the database names from the metadata table information_schema.schemata that you want mysqldump'd, create a query to return that list, then use that list of databases to formulate the mysqldump command.

DATABASES_TO_EXCLUDE="db1 db2 db3"
EXCLUSION_LIST="'information_schema','mysql'"
for DB in `echo "${DATABASES_TO_EXCLUDE}"`
do
    EXCLUSION_LIST="${EXCLUSION_LIST},'${DB}'"
done
SQLSTMT="SELECT schema_name FROM information_schema.schemata"
SQLSTMT="${SQLSTMT} WHERE schema_name NOT IN (${EXCLUSION_LIST})"
MYSQLDUMP_DATABASES="--databases"
for DB in `mysql -ANe"${SQLSTMT}"`
do
    MYSQLDUMP_DATABASES="${MYSQLDUMP_DATABASES} ${DB}"
done
MYSQLDUMP_OPTIONS="--routines --triggers"
mysqldump ${MYSQLDUMP_OPTIONS} ${MYSQLDUMP_DATABASES} > MySQLDatabases.sql

All you need to do is put the databases you do not want mysqldump'd into DATABASES_TO_EXCLUDE

Give it a Try !!!

Best Answer

Related Solutions

Mysql – Error on import of thesqldump file – Illegal double value found during parsing

MySQL – How to Use mysqldump to Ignore Databases for Backup

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