A condition that must be satisfied in order for a conditional DeleteItem to succeed.
An expression can contain any of the following:
Functions: attribute_exists | attribute_not_exists | attribute_type |
contains | begins_with | size
These function names are case-sensitive.
Comparison operators: = | <> | < | > | <= |
>= | BETWEEN | IN
Logical operators: AND | OR | NOT For more information on condition expressions, see Specifying Conditions
(http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Expressions.SpecifyingConditions.html) in the Amazon DynamoDB Developer Guide.
ConditionExpression replaces the legacy ConditionalOperator and Expected