TimespanProxy

class lsst.daf.butler.queries.expression_factory.TimespanProxy(expression: Annotated[IntColumnLiteral | StringColumnLiteral | FloatColumnLiteral | HashColumnLiteral | UUIDColumnLiteral | DateTimeColumnLiteral | TimespanColumnLiteral | RegionColumnLiteral | DimensionKeyReference | DimensionFieldReference | DatasetFieldReference | UnaryExpression | BinaryExpression, FieldInfo(annotation=NoneType, required=True, discriminator='expression_type')])

Bases: ExpressionProxy

An ExpressionProxy specialized for timespan columns and literals.

Parameters

expressiontree.ColumnExpression

Expression that backs this proxy.

Attributes Summary

begin	An expression representing the lower bound (inclusive).
end	An expression representing the upper bound (exclusive).

Methods Summary

overlaps(other)

Return a boolean expression representing an overlap test between this timespan and another timespan or a datetime.

Attributes Documentation

begin

An expression representing the lower bound (inclusive).

end

An expression representing the upper bound (exclusive).

Methods Documentation

overlaps(other: TimespanProxy | Timespan | astropy.time.Time) → tree.Predicate

Return a boolean expression representing an overlap test between this timespan and another timespan or a datetime.

Parameters

otherTimespanProxy or Timespan

Expression or literal to compare to.

Returns

predicatetree.Predicate

Boolean expression object.