The mysqldump command in MySQL is used for creating backups of MySQL databases. One of its options, -y or --no-tablespaces, allows users to exclude tablespace information from the output generated by mysqldump. This option is useful when you want to omit metadata related to tablespaces during the backup process.
Here are some examples illustrating the usage of the -y option:
Example 1: Dump a single database excluding tablespace information:
mysqldump -y -u username -p database_name > backup.sql
In this command, -y ensures that tablespaces information is not included in the backup file backup.sql of database_name. To verify if tablespaces information is omitted, you can examine the contents of backup.sql and check for any references to tablespaces.
Example 2: Dump all databases except tablespaces:
mysqldump -y -u username -p --all-databases > all_databases.sql
This command backs up all databases on the MySQL server, excluding tablespace information. To verify, open all_databases.sql and ensure no tablespaces metadata is present.
Example 3: Dump a specific table without tablespace details:
mysqldump -y -u username -p database_name table_name > table_backup.sql
Here, table_backup.sql will contain only the structure and data of table_name from database_name, without any tablespace information.
Example 4: Exclude tablespace information in a compressed backup:
mysqldump -y -u username -p database_name | gzip > backup.sql.gz
This command compresses the backup of database_name while excluding tablespaces information. After extraction, verify the contents of backup.sql to confirm.
Example 5: Dump with tablespace exclusion and verbose output:
mysqldump -y -v -u username -p database_name > backup_verbose.sql
The -v flag adds verbosity to the output, useful for monitoring the dump process. Check backup_verbose.sql for the absence of tablespaces metadata.
Example 6: Dump excluding events and tablespace details:
mysqldump -y --ignore-table=database_name.events -u username -p database_name > backup_no_events.sql
This command excludes both events and tablespaces information from the backup of database_name. Verify the resulting file to ensure completeness.
Example 7: Dump excluding stored procedures with no tablespace info:
mysqldump -y --routines=false -u username -p database_name > backup_no_routines.sql
Here, stored procedures are excluded alongside tablespace details in backup_no_routines.sql. Confirm by reviewing the backup file.
Example 8: Dump specific tables without tablespaces:
mysqldump -y -u username -p database_name table1 table2 > tables_backup.sql
tables_backup.sql will include table1 and table2 from database_name, omitting any tablespace information.
Example 9: Dump excluding triggers and tablespaces:
mysqldump -y --skip-triggers -u username -p database_name > backup_no_triggers.sql
This command skips triggers and tablespaces information when backing up database_name. Verify the backup file to ensure the exclusion.
Example 10: Dump a single table without tablespace details:
mysqldump -y -u username -p database_name table_name --no-create-info > data_only.sql
data_only.sql will contain only the data from table_name, excluding its structure and tablespace information.
Read Also
Using Custom Configuration Files with mysqldump
Dump All Tablespaces with mysqldump
Dump All Databases Using mysqldump
How to Utilize Named Login Paths in mysqldump
Exclude Default Option Files in mysqldump Output
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