IDEA reported an error Unable to resolve column XXXX solution.

Cause Analysis	IDEA cannot fully identify the information of the database
Scenes	When Mybatis in IDEA needs to write SQL statements, the compilation process will report a warning

In idea, file>setting–>languages&Frameworks–>SQL Resolution Scopes–>Project mapping select the library table of your own project–>click the plus sign to add your own project address–>Select your own library table as under Resolution Scope ——>Apply——>OK is solved.