In my application i am using below property
spring.jpa.properties.hibernate.hbm2ddl.auto= validate
so does it validates schema like if manually i added one new column in my oracle table and not added this column in java entity .
so in this case will it give error on project startup ?
No, it's perfectly alright to have columns in a table that aren't mapped. An error would be a missing column or table that's mapped to an entity. Your database doesn't need to be identical to your mappings.