Code conversion device, method and program

A code conversion method comprising:

• accepting input of a target program code which is the program code to be processed;
• extracting, from the target program code, a first program code indicating that aggregation processing of each column in a data frame is performed based on a predetermined column value for a data frame representing data in a two-dimensional tabular format, and a second program code indicating predefined processing to be performed on each data frame for which the aggregation processing is performed and a function that calls the predefined processing;
• converting the extracted first program code and second program code into alternative program code, which is program code indicating a process that does not make a function call that invokes the predefined processing by the function and that produces a same result as the process by the first program code and the second program code;
• and
• outputting the alternative program code.

A non-transitory computer readable information recording medium storing a code conversion program, when executed by a processor, that performs a method for:

• accepting input of a target program code which is the program code to be processed;
• extracting, from the target program code, a first program code indicating that aggregation processing of each column in a data frame is performed based on a predetermined column value for a data frame representing data in a two-dimensional tabular format, and a second program code indicating predefined processing to be performed on each data frame for which the aggregation processing is performed and a function that calls the predefined processing;
• converting the extracted first program code and second program code into alternative program code, which is program code indicating a process that does not make a function call that invokes the predefined processing by the function and that produces a same result as the process by the first program code and the second program code;
• and
• outputting the alternative program code.