What is the difference between vers and envers

As in English, the actual choice of a preposition can be highly idiomatic. For example, when people say have a beer on me or I'm waiting on a Big Mac and fries , the preposition on doesn't have its basic meaning of "on top of"— it's essentially the preposition that speakers have got used to using in these cases for no especially good reason. So you can imagine that in other languages, the choice of the equivalent of on in these cases would also vary somewhat.

What we give here, then, are essentially the equivalents of the preposition when it has what we might see as its "basic" meaning. As you might have gathered, that's not the full story. Beyond the prepositions above, French has a number of others, at least some of which you will probably need to get to grips with sooner or later:.

LazyInitializationException is the constant threat. Moreover, Hibernate dynamic proxies and persistent collections clutter your object graph. Looks fine, but what happens when you run this test? The second query throws an exception:.

After some digging in the User Guide , we can find the answer — Modification Flags. If we want to query by changed property we need to enable them for our class:. When we see these flags, they become obvious. Envers uses them to find records with changes on a given property. Search by changed property. Here, at the beginning, Envers threw an exception and we had to add the Modification Flags to the table schema.

I like the design of these flags for its simplicity. The problem is that they are disabled by default. Adding them to existing tables could be a pain… I think that JaVers solved this problem in a bit more elegant way. Snapshot structure is fixed, no more mucking around flags configuration. This is useful. Besides eq , you can use many other operators typical to SQL: ge , le , like , between , etc. In JaVers, there are no property value filters, we have the open issue for that.

On the other hand, JaVers offers a few filters based on Commit metadata. You can query by Commit author, dates and properties:. The last task is the hardest part of the competition.

We want to reconstruct the full object graph for a given point in time. That means time-aware joins which are tricky. In this use case, we load the historical version of one Employee and we check if related Employees are joined in proper versions.

To make the case harder and more realistic , we update Employees independently. Both tools have succeeded to reconstruct the correct object graph.

Performance benchmark is beyond the scope of this article. Develop and improve products. List of Partners vendors.

Share Flipboard Email. By ThoughtCo Team. Updated August 27, Featured Video. Cite this Article Format. Team, ThoughtCo. Using the French Prepositions 'En' and 'Dans'. They admire the sun setting behind the hills. Finally, they kiss passionately in front of the Capitol. Compare with dans. See also the use of en with place names and en with a present participle. They have a drink in a bar at the end of Fifth Street. Outside of Tammy, Tex doesn't know many Texans.

In spite of the alcohol, Tex behaves like a gentleman. Tex is seated across from Tammy. All of a sudden, Bette appears at the top of the staircase. Contrast with parmi 'among'.

Puis elle vient s'asseoir entre Tammy et Tex. Then she comes and sits down between Tammy and Tex. Contrast with vers , which means toward in a spatial or temporal sense. Tammy ressent une certaine antipathie envers Bette. Tammy feels a certain animosity toward Bette. Tex discovered his grandfather thanks to Rita's photo album. Paw-Paw lives outside of the city of Opelousas.

It is out of the question that Tex live in Opelousas. Tex and Tammy are going as far as Opelousas. Tex lives far from his grandfather Paw-Paw Louis. In spite of the distance, Tex likes to go see his grandfather.

It means 'by' when it is used with the passive voice. Tex goes to Opelousas once a month one time per month. Tex is invited to Opelousas by Paw-Paw. Tex goes through Houston to get to Opelousas.

Contrast with entre between.