Data conversion method and computer system therefor

A computer system comprising:

• a database conversion server for converting a table of a database;
• and
• storage for storing the database;
• wherein:
• said database conversion server has table volume mapping information that associates the table of the database with storage information about storage in which the table is stored, said database conversion server comprising the functions of:
• with reference to the table volume mapping information, separating a data conversion job used for data conversion into a data conversion server job for executing conversion processing on the database conversion server and a storage job for instructing a copy of the table on the storage;
• executing the storage job to instruct a copy of a volume containing the table;
• and
• executing the data conversion server job to perform data conversion of the copied table.

A database conversion server for converting a table of a database, said database conversion server being connected to storage for storing the database, said database conversion server comprising the functions of:

• separating a data conversion job definition used for data conversion into a data conversion server job definition for executing conversion processing on the database conversion server and a storage job definition for instructing a copy of the table on the storage;
• requesting a job execution engine to execute the storage job definition, and thereby the storage is instructed to copy the table;
• and
• requesting the job execution engine to execute the data conversion server job definition, and thereby only fields which need to be converted are extracted from the copied table, and then the extracted fields are converted.

A data conversion program for converting table data of a database, said data conversion program comprising the functions of:

• separating a data conversion job definition used for data conversion into a data conversion server job definition for executing conversion processing on a data conversion server and a storage job definition for instructing a copy of a table on storage;
• requesting a job execution engine to execute the storage job definition, and thereby the storage is instructed to copy the table;
• and
• requesting the job execution engine to execute the data conversion server job definition to perform data conversion of the copied table.