RegionProxy¶

class lsst.daf.butler.queries.expression_factory.RegionProxy(expression: IntColumnLiteral | StringColumnLiteral | FloatColumnLiteral | HashColumnLiteral | UUIDColumnLiteral | DateTimeColumnLiteral | TimespanColumnLiteral | RegionColumnLiteral | DimensionKeyReference | DimensionFieldReference | DatasetFieldReference | UnaryExpression | BinaryExpression)¶

Bases: ExpressionProxy

An ExpressionProxy specialized for region columns and literals.

Parameters:

expressiontree.ColumnExpression: Expression that backs this proxy.

Attributes Summary

A boolean expression that tests whether this expression is NULL.

Methods Summary

overlaps(other)

Return a boolean expression representing an overlap test between this region and another.

Attributes Documentation

is_null¶: A boolean expression that tests whether this expression is NULL.

Methods Documentation

overlaps(other: RegionProxy | Region) → Predicate¶

Return a boolean expression representing an overlap test between this region and another.

Parameters:

otherRegionProxy or Region: Expression or literal to compare to.

Returns:

predicatetree.Predicate: Boolean expression object.