What is DB2 Precompilation?

The Db2 precompiler scans a program and copies all of the SQL statements and host variable information into a DBRM (database request module). The precompiler also returns source code that has been modified so that the SQL statements do not cause errors when you compile the program.

What is the role of a precompiler?

In computer science, a preprocessor (or precompiler) is a program that processes its input data to produce output that is used as input to another program. The output is said to be a preprocessed form of the input data, which is often used by some subsequent programs like compilers.

What is pre compile?

Precompile definition To do a preliminary conversion before doing the final conversion. The precompile phase sets up the source code, database, etc., in such a way that the final phase is performed faster. (computing) To compile in advance.

What is Plan bind in DB2?

Plans are collections of packages. Suppose we specify one or more DBRMs to include in the plan (using the MEMBER option of BIND PLAN). In that case, Db2 automatically binds those DBRMs into packages and then binds those packages into the plan.

What is Precompilation process?

Precompilation is the process through which the SQL statements used in the COBOL-DB2 program are replaced by appropriate COBOL calls. The precompilation is necessary before the actual compilation because the COBOL compiler cannot recognize the DB2 SQL statements and will throw errors due to them.

What is Dbrm in mainframe?

DBRM stands for Database Request Module. This is the traditional DB2® serialized representation of the SQL statements in a program.

What is precompiler in DBMS?

Software that turns SQL commands written within a source program into the appropriate function calls for the database management system (DBMS) being used.

What does Stdafx mean?

h (named stdafx. h before Visual Studio 2017) is a file generated by the Microsoft Visual Studio IDE wizard, that describes both standard system and project specific include files that are used frequently but hardly ever change. The afx in stdafx. h stands for application framework extensions.

What is a precompiled library?

Precompiled Standard Library is the . pyc (byte code) files generated for each of the standard libraries in python. It just converts . py code to . pyc code.

What is difference between plan and package?

The main difference between Plan and package lies with the time. When a DBRM undergoes the bind process, the outcome in earlier days was called as a Plan and nowadays it can either be a Plan or a package. So, plan was what existed prior to DB2 V2R3 and the concept of binding a DBRM into a package came later.