Defined in File LogicalProject.cpp
evaluate_expressions(const cudf::table_view &table, const std::vector<std::string> &expressions)¶
Evaluates multiple expressions consisting of arithmetic operations and SQL functions.
The computation of the results consist of two steps:
We evaluate all complex operations operations one by one. Complex operations are operations that can’t be mapped as f(input_table[row]) => output_table[row] for a given row in a table e.g. string functions
We batch all simple operations and evaluate all of them in a single GPU kernel call. Simple operations are operations that can be mapped as f(input_table[row]) => output_table[row] for a given row in a table e.g. arithmetic operations and cast between primitive types