The declaration generator provides an SQL Declare Table statement and language like COBOL, C data declaration for a particular table or view.
In the context of IBM Db2, DCLGEN stands for Declaration Generator. DCLGEN is a utility that generates host language declarations for SQL statements embedded in application programs. These declarations are used to define the structure of result sets and host variables in the program.
When you embed SQL statements in a host language (such as COBOL or C) within your application programs, you need to declare the structure of the result sets and host variables used in those SQL statements. DCLGEN automates this process by generating the necessary declarations based on the SQL statements in your program.
In summary, DCLGEN simplifies the task of declaring host variables and result sets in your application programs when using SQL with Db2 databases. It helps ensure consistency and accuracy in the data types and structures used in your SQL statements and program variables.