Spring boot show sql parameter binding?

This is just a hint to the underlying persistence provider e.g. Hibernate, EclipseLink etc. Without knowing what you are using it is difficult to say.

For Hibernate you can configure logging to also output the bind parameters:

http://www.mkyong.com/hibernate/how-to-display-hibernate-sql-parameter-values-log4j/

which will give you output like:

Hibernate: INSERT INTO transaction (A, B) 
VALUES (?, ?)
13:33:07,253 DEBUG FloatType:133 - binding '10.0' to parameter: 1
13:33:07,253 DEBUG FloatType:133 - binding '1.1' to parameter: 2

An alternative solution which should work across all JPA providers is to use something like log4jdbc which would give you the nicer output:

INSERT INTO transaction (A, B) values (10.0, 1.1);

See:

https://code.google.com/p/log4jdbc-log4j2/

Add these to application.properties and you should see the logs in details.

logging.level.org.hibernate.SQL=debug
logging.level.org.hibernate.type.descriptor.sql=trace