Java.lang.IllegalArgumentException:XXX is ambiguous in Mapped statements collection

The problem arises:

When adding a new column in the background, the file does not have an error, as the program already has the original code to add new features. When you click on the new column, Java.lang.IllegalArgumentException:selectPageByExample is. Ambiguous in Mapped statements collection (try using the full name including the namespace, or rename one of the entries).

Solve:

Find the information on the Internet, said the XML configuration error, mainly namespace conflict, to write the full name and so on. However, I found that my namespace was correct and there were no duplicate names. Baffled, and later in watching the MyBatis video of the discovery, Originally mapper is a mapping file, the implementation of the method inside the class is actually the corresponding xxx.xml inside the SQL statement, thereby manipulating the database. Then I found the method of error, found that there is no sqlstatements in Xx.xml.

Plus the relative statements will not be an error.

Java.lang.IllegalArgumentException:XXX is ambiguous in Mapped statements collection