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get_target_functional_dependencies in datafusion::common - Rust
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datafusion::common

Function get_target_functional_dependencies

Source 
pub fn get_target_functional_dependencies(
    schema: &DFSchema,
    group_by_expr_names: &[String],
) -> Option<Vec<usize>>
Expand description

Returns target indices, for the determinant keys that are inside group by expressions.