Debug Check in mysqldump

The mysqldump command in MySQL is used to create backups of MySQL databases. One of the options available is --debug-check, which enables debug checking during the dumping process to help identify any potential issues or errors that might occur. This option is particularly useful for troubleshooting and ensuring the integrity of the backup data.

Here are several examples demonstrating the usage of --debug-check in mysqldump:

Example 1: Basic usage with a single database:

        mysqldump --debug-check mydatabase
        

This command performs a debug check while dumping the database named mydatabase. The output typically includes diagnostic messages related to the dump process and any encountered issues.

Example 2: Dumping multiple databases with debug checking:

        mysqldump --debug-check --databases db1 db2 db3
        

Here, the --databases option specifies multiple databases (db1, db2, db3) to be dumped with debug checking enabled. Each database’s debug information will be displayed separately.

Example 3: Debug checking with table-level backup:

        mysqldump --debug-check mydatabase mytable
        

This command dumps only the mytable table from the mydatabase database while performing debug checking. It verifies the dump process specifically for this table.

Example 4: Using debug checking with compression:

        mysqldump --debug-check --single-transaction --quick --compress mydatabase
        

Here, debug checking is applied along with other options like --single-transaction, --quick, and --compress to create a compressed backup of the mydatabase database.

Example 5: Debug checking with extended inserts:

        mysqldump --debug-check --extended-insert mydatabase
        

This command enables extended inserts while performing debug checking for the mydatabase database, optimizing the dump process for faster insertion of data during restoration.

Example 6: Dumping with debug checking and ignoring table data:

        mysqldump --debug-check --no-data mydatabase
        

Here, --no-data ensures only table structures are dumped, while debug checking verifies the structure dump for potential issues.

Example 7: Debug checking with specific login credentials:

        mysqldump --debug-check --user=myuser --password=mypassword mydatabase
        

This command specifies login credentials (--user and --password) for the user myuser to dump the mydatabase with debug checking.

Example 8: Debug checking with custom SQL query:

        mysqldump --debug-check --where="id > 1000" mydatabase mytable
        

Here, a custom SQL query (--where="id > 1000") filters data while debug checking ensures integrity during the dump process for the specified table mytable in mydatabase.

Example 9: Debug checking with XML format output:

        mysqldump --debug-check --xml mydatabase
        

This command dumps the mydatabase with debug checking enabled and outputs the result in XML format, useful for structured data analysis and parsing.

Example 10: Debug checking with tabular format output:

        mysqldump --debug-check --tab=/backup mydatabase
        

Here, the --tab=/backup option dumps the mydatabase with debug checking and creates tabular format output files in the specified directory /backup.

To verify whether the mysqldump command executed successfully with --debug-check, you can check the terminal output or any generated log files for debug messages or errors. Alternatively, inspect the resulting dump files to ensure they reflect the expected database structure and content integrity.

Also check similar articles.

Debugging Options in mysqldump
Dump Multiple Databases with mysqldump
Including MySQL Specific Create Options in mysqldump
Using Compression in mysqldump Output
Using Complete INSERT Statements in mysqldump