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Does Amazon Dynamodb Support Conditional Operations? |
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Answer» For an operation to be COMPLETED on an item, you have to specify a condition.You can define a ConditionExpression that can be constructed from the following: Boolean functions: ATTRIBUTE_EXIST, CONTAINS, and BEGINS_WITH =, <>, <, >, <=, >=, BETWEEN, and IN NOT, AND, and OR. You can also construct a free-form conditional expression that COMBINES multiple conditional clauses which also includes nested clauses. For an operation to be completed on an item, you have to specify a condition.You can define a ConditionExpression that can be constructed from the following: Boolean functions: ATTRIBUTE_EXIST, CONTAINS, and BEGINS_WITH Comparison operators: =, <>, <, >, <=, >=, BETWEEN, and IN NOT, AND, and OR. You can also construct a free-form conditional expression that combines multiple conditional clauses which also includes nested clauses. |
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