Implement nightly backup and restore procedure in task.sh

[Petliuk]

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[mateacademy-ai-mentor]

Review Summary

Your script has a critical execution error that prevents the backup/restore operations from completing. The error ERROR 1046 (3D000) at line 22: No database selected occurs because the mysql restore commands do not specify which database to use when executing the SQL dump file. When restoring databases with mysql < /scripts/backup.sql, MySQL needs to know which database to target. Your script uses sed to replace database names in the dump output, but doesn't tell mysql which database to restore into. To fix this, add the database name as an argument to each mysql restore command. For example: mysql -u "$DB_USER" -p"$DB_PASSWORD" ShopDBReserve < /tmp/full_backup.sql or use the -D flag: mysql -u "$DB_USER" -p"$DB_PASSWORD" -D ShopDBReserve < /tmp/full_backup.sql. This is blocking because the backup operations complete successfully, but the restore step fails for all three databases. Once you specify the target database in the restore commands, the script should execute end-to-end.

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[mateacademy-ai-mentor]

Review Summary

The script correctly implements all task requirements: it reads DB_USER and DB_PASSWORD from environment variables, creates a full backup of ShopDB and restores it to ShopDBReserve with schema and data, and creates a data-only backup (excluding schema) for ShopDBDevelopment. The critical issue that was present before—missing database name in mysql restore commands causing ERROR 1046—has been successfully resolved by specifying the target database as an argument to each mysql command. All 18 checklist items pass, and the pipeline approach used for both backup and restore operations is clean and efficient, making it suitable for cron job execution. Great work on fixing the database name issue and ensuring the script meets all requirements.

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