Possible problems in MySQL cross database operation with database name

Mysql Possible problems in cross library operation with the library name

Put it in the test environment , The library name of the test environment is inconsistent , Test environment loss

When the test environment shares the same server with the production environment mysql When
To distinguish between test libraries and production Libraries The test library may be followed by _test Make a distinction
For example, the production warehouse is called db_order, The test library may be called db_order_test
This time , Cross database operations are carried out with the database name curd There are problems

Master slave synchronization , Data from multiple master databases are synchronized to one slave database

When multiple master databases , Sync to a slave Library
The main library Add modify delete The command with the database name will export that the corresponding database does not exist in the library
Master-slave error 1146: The corresponding database table cannot be found from the Library