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String Column Factory
make_string_column(...)
- What are the necessary inputs?
- Do we need more than one factory for String columns for different inputs?
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String column wrapper type
- There should be a type,
cudf::string_column
that is a thin wrapper aroundcudf::column
that encodes behavior unique to string columns, e.g., it abstracts which children are offsets vs characters, etc. - Example usage would be something like:
unique_ptr<cudf::column> col = make_string_column(...); // String specific view constructable from a `cudf::column`of type STRING cudf::string_column_view strings{col}; // The wrapper type abstracts the roles of children column_view offsets = strings.offsets(); // returns child that holds offsets column_view chars = strings.characters(); // returns child that holds characters // Top-level string specific APIs can accept string_column_views directly void string_specific_function(string_column_view strings); // wrapper type can provide string specific device functions __global__ kernel( string_column_view strings1, string_column_view strings2){ ... // compares string `i` in `strings1` to string `j` in `strings2` compare_strings(strings1, i, strings2, j); }
- There should be a type,
Last active
August 27, 2019 16:17
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Musings on STRING cudf::columns
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