Enum Ring0Predicate 

pub enum Ring0Predicate {
    Eq {
        column_index: usize,
        value: ScalarValue,
    },
    NotEq {
        column_index: usize,
        value: ScalarValue,
    },
    Gt {
        column_index: usize,
        value: ScalarValue,
    },
    GtEq {
        column_index: usize,
        value: ScalarValue,
    },
    Lt {
        column_index: usize,
        value: ScalarValue,
    },
    LtEq {
        column_index: usize,
        value: ScalarValue,
    },
    Between {
        column_index: usize,
        low: ScalarValue,
        high: ScalarValue,
    },
    IsNull {
        column_index: usize,
    },
    IsNotNull {
        column_index: usize,
    },
    In {
        column_index: usize,
        values: SmallVec<[ScalarValue; 8]>,
    },
}

Ring 0 predicate (must be zero-allocation, < 50ns).

Supports column-level checks that can be evaluated with no heap allocation. Complex expressions (AND/OR, multi-column, UDFs) are deferred to Ring 1.

Variants

Eq

Column equals a constant value: column = value

Fields

column_index: usize

Column index in the RecordBatch schema.

value: ScalarValue

The constant value to compare against.

NotEq

Column not equal: column != value / column <> value

Fields

column_index: usize

Column index in the RecordBatch schema.

value: ScalarValue

The constant value to compare against.

Gt

Column greater than: column > value

Fields

column_index: usize

Column index in the RecordBatch schema.

value: ScalarValue

The constant value to compare against.

GtEq

Column greater than or equal: column >= value

Fields

column_index: usize

Column index in the RecordBatch schema.

value: ScalarValue

The constant value to compare against.

Lt

Column less than: column < value

Fields

column_index: usize

Column index in the RecordBatch schema.

value: ScalarValue

The constant value to compare against.

LtEq

Column less than or equal: column <= value

Fields

column_index: usize

Column index in the RecordBatch schema.

value: ScalarValue

The constant value to compare against.

Between

Column is between two values (inclusive): column BETWEEN low AND high

Fields

column_index: usize

Column index in the RecordBatch schema.

low: ScalarValue

Lower bound (inclusive).

high: ScalarValue

Upper bound (inclusive).

IsNull

Column is null: column IS NULL

Fields

column_index: usize

Column index in the RecordBatch schema.

IsNotNull

Column is not null: column IS NOT NULL

Fields

column_index: usize

Column index in the RecordBatch schema.

In

Column value is in a set: column IN (v1, v2, ...)

Limited to 8 values to stay on the stack via SmallVec.

Fields

column_index: usize

Column index in the RecordBatch schema.

values: SmallVec<[ScalarValue; 8]>

Fixed-capacity inline set. Max 8 values to stay on stack.

Implementations

impl Ring0Predicate

pub fn evaluate( &self, batch: &RecordBatch, row: usize, intern: &StringInternTable, ) -> bool

Evaluates the predicate against a single row in a RecordBatch.

Returns true if the row matches the predicate. This runs on the Ring 0 hot path.

Trait Implementations

impl Clone for Ring0Predicate

fn clone(&self) -> Ring0Predicate

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Ring0Predicate

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.