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Disclosed is a process to store static information in a precompiled source file so that the information can be used at runtime for the Database Manager to process executable SQL statements.
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Preinitialized Data Structure Generated by the Precompiler
Disclosed is a process to store static information in a precompiled source file
so that the information can be used at runtime for the Database Manager to
process executable SQL statements.
The precompiler generates runtime calls to the Database Manager for every
executable SQL statement found in a user's source file. Each of these calls
requires certain information to be stored in a data structure, the SQLRA. Some of
the information changes on each call and some is static for the entire application.
The precompiler generates a data structure in the user's source file to store
the static information so that it can be used to initialize the SQLRA before each
call to the Database Manager. The initiaization occurs at runtime.
The data structure generated by the precompiler has the same general
structure as an actual SQLRA. The static data is stored as initialization data for
the declared data structure. The structure is passed to a runtime function that
can use it as an actual SQLRA data structure.
The structure is available to the code in the source file and also to the
Database Manager runtime functions. The static data is stored in the proper
fields required for a real SQLRA, so there is no need to reassign the static data
for each call to a runtime function.