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Editor to share with you why Mybatis needs to be pre-compiled, I believe most people do not know much about it, so share this article for your reference, I hope you can learn a lot after reading this article, let's go to understand it!

Why do you need precompilation?

Definition:

SQL precompilation means that the database driver compiles SQL statements and parameters before sending SQL statements and parameters to DBMS, so that DBMS does not need to recompile when it executes SQL.

Why do you need precompilation?

Object PreparedStatement is used in JDBC to abstract precompiled statements, and precompiled is used. The precompilation phase can optimize the execution of SQL. In most cases, the precompiled SQL can be executed directly, and the DBMS does not need to be compiled again. The more complex the SQL, the greater the compilation complexity, and the precompilation phase can merge multiple operations into one operation. At the same time, the object of the precompiled sentence can be reused. Cache a SQL precompiled PreparedStatement object, and next time for the same SQL, you can use the cached PreparedState object directly. Mybatis by default, all SQL is precompiled.

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