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use arrow::array::{Array, BooleanArray};
use arrow::bitmap::{binary_fold, quaternary, ternary};
use arrow::datatypes::ArrowDataType;
/// Returns whether any of the non-null values in the array are `true`.
///
/// If there are no non-null values, None is returned.
pub fn any(arr: &BooleanArray) -> Option<bool> {
let null_count = arr.null_count();
if null_count == arr.len() {
None
} else if null_count == 0 {
Some(arr.values().set_bits() > 0)
} else {
Some(arr.values().intersects_with(arr.validity().unwrap()))
}
}
/// Returns whether all non-null values in the array are `true`.
///
/// If there are no non-null values, None is returned.
pub fn all(arr: &BooleanArray) -> Option<bool> {
let null_count = arr.null_count();
if null_count == arr.len() {
None
} else if null_count == 0 {
Some(arr.values().unset_bits() == 0)
} else {
let false_found = binary_fold(
arr.values(),
arr.validity().unwrap(),
|lhs, rhs| (!lhs & rhs) != 0,
false,
|a, b| a || b,
);
Some(!false_found)
}
}
/// Inverts false to true and vice versa. Nulls remain null.
pub fn not(array: &BooleanArray) -> BooleanArray {
let values = !array.values();
let validity = array.validity().cloned();
BooleanArray::new(ArrowDataType::Boolean, values, validity)
}
/// Logical 'or' operation on two arrays with [Kleene logic](https://en.wikipedia.org/wiki/Three-valued_logic#Kleene_and_Priest_logics)..
pub fn or(lhs: &BooleanArray, rhs: &BooleanArray) -> BooleanArray {
assert_eq!(
lhs.len(),
rhs.len(),
"lhs and rhs must have the same length"
);
let lhs_values = lhs.values();
let rhs_values = rhs.values();
let lhs_validity = lhs.validity();
let rhs_validity = rhs.validity();
let validity = match (lhs_validity, rhs_validity) {
(Some(lhs_validity), Some(rhs_validity)) => {
Some(quaternary(
lhs_values,
rhs_values,
lhs_validity,
rhs_validity,
|lhs, rhs, lhs_v, rhs_v| {
// A = T
(lhs & lhs_v) |
// B = T
(rhs & rhs_v) |
// A = F & B = F
(!lhs & lhs_v) & (!rhs & rhs_v)
},
))
},
(Some(lhs_validity), None) => {
// B != U
Some(ternary(
lhs_values,
rhs_values,
lhs_validity,
|lhs, rhs, lhs_v| {
// A = T
(lhs & lhs_v) |
// B = T
rhs |
// A = F & B = F
(!lhs & lhs_v) & !rhs
},
))
},
(None, Some(rhs_validity)) => {
Some(ternary(
lhs_values,
rhs_values,
rhs_validity,
|lhs, rhs, rhs_v| {
// A = T
lhs |
// B = T
(rhs & rhs_v) |
// A = F & B = F
!lhs & (!rhs & rhs_v)
},
))
},
(None, None) => None,
};
BooleanArray::new(ArrowDataType::Boolean, lhs_values | rhs_values, validity)
}
/// Logical 'and' operation on two arrays with [Kleene logic](https://en.wikipedia.org/wiki/Three-valued_logic#Kleene_and_Priest_logics).
pub fn and(lhs: &BooleanArray, rhs: &BooleanArray) -> BooleanArray {
assert_eq!(
lhs.len(),
rhs.len(),
"lhs and rhs must have the same length"
);
let lhs_values = lhs.values();
let rhs_values = rhs.values();
let lhs_validity = lhs.validity();
let rhs_validity = rhs.validity();
let validity = match (lhs_validity, rhs_validity) {
(Some(lhs_validity), Some(rhs_validity)) => {
Some(quaternary(
lhs_values,
rhs_values,
lhs_validity,
rhs_validity,
|lhs, rhs, lhs_v, rhs_v| {
// B = F
(!rhs & rhs_v) |
// A = F
(!lhs & lhs_v) |
// A = T & B = T
(lhs & lhs_v) & (rhs & rhs_v)
},
))
},
(Some(lhs_validity), None) => {
Some(ternary(
lhs_values,
rhs_values,
lhs_validity,
|lhs, rhs, lhs_v| {
// B = F
!rhs |
// A = F
(!lhs & lhs_v) |
// A = T & B = T
(lhs & lhs_v) & rhs
},
))
},
(None, Some(rhs_validity)) => {
Some(ternary(
lhs_values,
rhs_values,
rhs_validity,
|lhs, rhs, rhs_v| {
// B = F
(!rhs & rhs_v) |
// A = F
!lhs |
// A = T & B = T
lhs & (rhs & rhs_v)
},
))
},
(None, None) => None,
};
BooleanArray::new(ArrowDataType::Boolean, lhs_values & rhs_values, validity)
}