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    Database efficient updating

    3) If exists and value is different: Update field and field revision.

    This will have two improvements: 1) Write to the database only if value changed 2) Select Update are much faster then Delete Insert Some of the benefits on database performance I can see are: I totally agree with you here (and it is an issue/feature of Drupal 7.x too) But there may be some history behind this?

    database efficient updating-8database efficient updating-69database efficient updating-15

    I would expect to see the following logic: 1) Query existing value for the field 2) If doesn't exist: Insert field and field revision.He minimizes the development time using modern SQL and optimizes the runtime with smart indexing.His book entitled SQL Performance Explained has become standard reading.“Use The Index, Luke!Built-in locking and transactions management functionality allow users to access data as it is being changed, prevents collisions between two users updating the data, and keeps users from accessing partially updated records.Authorization and privilege control features in an RDBMS allow the database administrator to restrict access to authorized users, and grant privileges to individual users based on the types of database tasks they need to perform.

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