Package software.amazon.awssdk.services.dynamodb.model

Class DeleteItemRequest

    • Method Detail

      • tableName

        public final String tableName()

        The name of the table from which to delete the item. You can also provide the Amazon Resource Name (ARN) of the table in this parameter.

        Returns:
        The name of the table from which to delete the item. You can also provide the Amazon Resource Name (ARN) of the table in this parameter.

      • hasKey

        public final boolean hasKey()
        For responses, this returns true if the service returned a value for the Key property. This DOES NOT check that the value is non-empty (for which, you should check the isEmpty() method on the property). This is useful because the SDK will never return a null collection or map, but you may need to differentiate between the service returning nothing (or null) and the service returning an empty collection or map. For requests, this returns true if a value for the property was specified in the request builder, and false if a value was not specified.

      • key

        public final Map<String,​AttributeValue> key()

        A map of attribute names to AttributeValue objects, representing the primary key of the item to delete.

        For the primary key, you must provide all of the key attributes. For example, with a simple primary key, you only need to provide a value for the partition key. For a composite primary key, you must provide values for both the partition key and the sort key.

        Attempts to modify the collection returned by this method will result in an UnsupportedOperationException.

        This method will never return null. If you would like to know whether the service returned this field (so that you can differentiate between null and empty), you can use the hasKey() method.

        Returns:
        A map of attribute names to AttributeValue objects, representing the primary key of the item to delete.

        For the primary key, you must provide all of the key attributes. For example, with a simple primary key, you only need to provide a value for the partition key. For a composite primary key, you must provide values for both the partition key and the sort key.

      • hasExpected

        public final boolean hasExpected()
        For responses, this returns true if the service returned a value for the Expected property. This DOES NOT check that the value is non-empty (for which, you should check the isEmpty() method on the property). This is useful because the SDK will never return a null collection or map, but you may need to differentiate between the service returning nothing (or null) and the service returning an empty collection or map. For requests, this returns true if a value for the property was specified in the request builder, and false if a value was not specified.

      • expected

        public final Map<String,​ExpectedAttributeValue> expected()

        This is a legacy parameter. Use ConditionExpression instead. For more information, see Expected in the Amazon DynamoDB Developer Guide.

        Attempts to modify the collection returned by this method will result in an UnsupportedOperationException.

        This method will never return null. If you would like to know whether the service returned this field (so that you can differentiate between null and empty), you can use the hasExpected() method.

        Returns:
        This is a legacy parameter. Use ConditionExpression instead. For more information, see Expected in the Amazon DynamoDB Developer Guide.

      • returnValues

        public final ReturnValue returnValues()

        Use ReturnValues if you want to get the item attributes as they appeared before they were deleted. For DeleteItem, the valid values are:

        • NONE - If ReturnValues is not specified, or if its value is NONE, then nothing is returned. (This setting is the default for ReturnValues.)

        • ALL_OLD - The content of the old item is returned.

        There is no additional cost associated with requesting a return value aside from the small network and processing overhead of receiving a larger response. No read capacity units are consumed.

        The ReturnValues parameter is used by several DynamoDB operations; however, DeleteItem does not recognize any values other than NONE or ALL_OLD.

        If the service returns an enum value that is not available in the current SDK version, returnValues will return ReturnValue.UNKNOWN_TO_SDK_VERSION. The raw value returned by the service is available from returnValuesAsString().

        Returns:
        Use ReturnValues if you want to get the item attributes as they appeared before they were deleted. For DeleteItem, the valid values are:

        • NONE - If ReturnValues is not specified, or if its value is NONE, then nothing is returned. (This setting is the default for ReturnValues.)

        • ALL_OLD - The content of the old item is returned.

        There is no additional cost associated with requesting a return value aside from the small network and processing overhead of receiving a larger response. No read capacity units are consumed.

        The ReturnValues parameter is used by several DynamoDB operations; however, DeleteItem does not recognize any values other than NONE or ALL_OLD.

        See Also:
        ReturnValue

      • returnValuesAsString

        public final String returnValuesAsString()

        Use ReturnValues if you want to get the item attributes as they appeared before they were deleted. For DeleteItem, the valid values are:

        • NONE - If ReturnValues is not specified, or if its value is NONE, then nothing is returned. (This setting is the default for ReturnValues.)

        • ALL_OLD - The content of the old item is returned.

        There is no additional cost associated with requesting a return value aside from the small network and processing overhead of receiving a larger response. No read capacity units are consumed.

        The ReturnValues parameter is used by several DynamoDB operations; however, DeleteItem does not recognize any values other than NONE or ALL_OLD.

        If the service returns an enum value that is not available in the current SDK version, returnValues will return ReturnValue.UNKNOWN_TO_SDK_VERSION. The raw value returned by the service is available from returnValuesAsString().

        Returns:
        Use ReturnValues if you want to get the item attributes as they appeared before they were deleted. For DeleteItem, the valid values are:

        • NONE - If ReturnValues is not specified, or if its value is NONE, then nothing is returned. (This setting is the default for ReturnValues.)

        • ALL_OLD - The content of the old item is returned.

        There is no additional cost associated with requesting a return value aside from the small network and processing overhead of receiving a larger response. No read capacity units are consumed.

        The ReturnValues parameter is used by several DynamoDB operations; however, DeleteItem does not recognize any values other than NONE or ALL_OLD.

        See Also:
        ReturnValue

      • returnConsumedCapacityAsString

        public final String returnConsumedCapacityAsString()
        Returns the value of the ReturnConsumedCapacity property for this object.

        If the service returns an enum value that is not available in the current SDK version, returnConsumedCapacity will return ReturnConsumedCapacity.UNKNOWN_TO_SDK_VERSION. The raw value returned by the service is available from returnConsumedCapacityAsString().

        Returns:
        The value of the ReturnConsumedCapacity property for this object.
        See Also:
        ReturnConsumedCapacity

      • returnItemCollectionMetrics

        public final ReturnItemCollectionMetrics returnItemCollectionMetrics()

        Determines whether item collection metrics are returned. If set to SIZE, the response includes statistics about item collections, if any, that were modified during the operation are returned in the response. If set to NONE (the default), no statistics are returned.

        If the service returns an enum value that is not available in the current SDK version, returnItemCollectionMetrics will return ReturnItemCollectionMetrics.UNKNOWN_TO_SDK_VERSION. The raw value returned by the service is available from returnItemCollectionMetricsAsString().

        Returns:
        Determines whether item collection metrics are returned. If set to SIZE, the response includes statistics about item collections, if any, that were modified during the operation are returned in the response. If set to NONE (the default), no statistics are returned.
        See Also:
        ReturnItemCollectionMetrics

      • returnItemCollectionMetricsAsString

        public final String returnItemCollectionMetricsAsString()

        Determines whether item collection metrics are returned. If set to SIZE, the response includes statistics about item collections, if any, that were modified during the operation are returned in the response. If set to NONE (the default), no statistics are returned.

        If the service returns an enum value that is not available in the current SDK version, returnItemCollectionMetrics will return ReturnItemCollectionMetrics.UNKNOWN_TO_SDK_VERSION. The raw value returned by the service is available from returnItemCollectionMetricsAsString().

        Returns:
        Determines whether item collection metrics are returned. If set to SIZE, the response includes statistics about item collections, if any, that were modified during the operation are returned in the response. If set to NONE (the default), no statistics are returned.
        See Also:
        ReturnItemCollectionMetrics

      • conditionExpression

        public final String conditionExpression()

        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 about condition expressions, see Condition Expressions in the Amazon DynamoDB Developer Guide.

        Returns:
        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 about condition expressions, see Condition Expressions in the Amazon DynamoDB Developer Guide.

      • hasExpressionAttributeNames

        public final boolean hasExpressionAttributeNames()
        For responses, this returns true if the service returned a value for the ExpressionAttributeNames property. This DOES NOT check that the value is non-empty (for which, you should check the isEmpty() method on the property). This is useful because the SDK will never return a null collection or map, but you may need to differentiate between the service returning nothing (or null) and the service returning an empty collection or map. For requests, this returns true if a value for the property was specified in the request builder, and false if a value was not specified.

      • expressionAttributeNames

        public final Map<String,​String> expressionAttributeNames()

        One or more substitution tokens for attribute names in an expression. The following are some use cases for using ExpressionAttributeNames:

        • To access an attribute whose name conflicts with a DynamoDB reserved word.

        • To create a placeholder for repeating occurrences of an attribute name in an expression.

        • To prevent special characters in an attribute name from being misinterpreted in an expression.

        Use the # character in an expression to dereference an attribute name. For example, consider the following attribute name:

        • Percentile

        The name of this attribute conflicts with a reserved word, so it cannot be used directly in an expression. (For the complete list of reserved words, see Reserved Words in the Amazon DynamoDB Developer Guide). To work around this, you could specify the following for ExpressionAttributeNames:

        • {"#P":"Percentile"}

        You could then use this substitution in an expression, as in this example:

        • #P = :val

        Tokens that begin with the : character are expression attribute values, which are placeholders for the actual value at runtime.

        For more information on expression attribute names, see Specifying Item Attributes in the Amazon DynamoDB Developer Guide.

        Attempts to modify the collection returned by this method will result in an UnsupportedOperationException.

        This method will never return null. If you would like to know whether the service returned this field (so that you can differentiate between null and empty), you can use the hasExpressionAttributeNames() method.

        Returns:
        One or more substitution tokens for attribute names in an expression. The following are some use cases for using ExpressionAttributeNames:

        • To access an attribute whose name conflicts with a DynamoDB reserved word.

        • To create a placeholder for repeating occurrences of an attribute name in an expression.

        • To prevent special characters in an attribute name from being misinterpreted in an expression.

        Use the # character in an expression to dereference an attribute name. For example, consider the following attribute name:

        • Percentile

        The name of this attribute conflicts with a reserved word, so it cannot be used directly in an expression. (For the complete list of reserved words, see Reserved Words in the Amazon DynamoDB Developer Guide). To work around this, you could specify the following for ExpressionAttributeNames:

        • {"#P":"Percentile"}

        You could then use this substitution in an expression, as in this example:

        • #P = :val

        Tokens that begin with the : character are expression attribute values, which are placeholders for the actual value at runtime.

        For more information on expression attribute names, see Specifying Item Attributes in the Amazon DynamoDB Developer Guide.

      • hasExpressionAttributeValues

        public final boolean hasExpressionAttributeValues()
        For responses, this returns true if the service returned a value for the ExpressionAttributeValues property. This DOES NOT check that the value is non-empty (for which, you should check the isEmpty() method on the property). This is useful because the SDK will never return a null collection or map, but you may need to differentiate between the service returning nothing (or null) and the service returning an empty collection or map. For requests, this returns true if a value for the property was specified in the request builder, and false if a value was not specified.

      • expressionAttributeValues

        public final Map<String,​AttributeValue> expressionAttributeValues()

        One or more values that can be substituted in an expression.

        Use the : (colon) character in an expression to dereference an attribute value. For example, suppose that you wanted to check whether the value of the ProductStatus attribute was one of the following:

        Available | Backordered | Discontinued

        You would first need to specify ExpressionAttributeValues as follows:

        { ":avail":{"S":"Available"}, ":back":{"S":"Backordered"}, ":disc":{"S":"Discontinued"} }

        You could then use these values in an expression, such as this:

        ProductStatus IN (:avail, :back, :disc)

        For more information on expression attribute values, see Condition Expressions in the Amazon DynamoDB Developer Guide.

        Attempts to modify the collection returned by this method will result in an UnsupportedOperationException.

        This method will never return null. If you would like to know whether the service returned this field (so that you can differentiate between null and empty), you can use the hasExpressionAttributeValues() method.

        Returns:
        One or more values that can be substituted in an expression.

        Use the : (colon) character in an expression to dereference an attribute value. For example, suppose that you wanted to check whether the value of the ProductStatus attribute was one of the following:

        Available | Backordered | Discontinued

        You would first need to specify ExpressionAttributeValues as follows:

        { ":avail":{"S":"Available"}, ":back":{"S":"Backordered"}, ":disc":{"S":"Discontinued"} }

        You could then use these values in an expression, such as this:

        ProductStatus IN (:avail, :back, :disc)

        For more information on expression attribute values, see Condition Expressions in the Amazon DynamoDB Developer Guide.

      • returnValuesOnConditionCheckFailure

        public final ReturnValuesOnConditionCheckFailure returnValuesOnConditionCheckFailure()

        An optional parameter that returns the item attributes for a DeleteItem operation that failed a condition check.

        There is no additional cost associated with requesting a return value aside from the small network and processing overhead of receiving a larger response. No read capacity units are consumed.

        If the service returns an enum value that is not available in the current SDK version, returnValuesOnConditionCheckFailure will return ReturnValuesOnConditionCheckFailure.UNKNOWN_TO_SDK_VERSION. The raw value returned by the service is available from returnValuesOnConditionCheckFailureAsString().

        Returns:
        An optional parameter that returns the item attributes for a DeleteItem operation that failed a condition check.

        There is no additional cost associated with requesting a return value aside from the small network and processing overhead of receiving a larger response. No read capacity units are consumed.

        See Also:
        ReturnValuesOnConditionCheckFailure

      • returnValuesOnConditionCheckFailureAsString

        public final String returnValuesOnConditionCheckFailureAsString()

        An optional parameter that returns the item attributes for a DeleteItem operation that failed a condition check.

        There is no additional cost associated with requesting a return value aside from the small network and processing overhead of receiving a larger response. No read capacity units are consumed.

        If the service returns an enum value that is not available in the current SDK version, returnValuesOnConditionCheckFailure will return ReturnValuesOnConditionCheckFailure.UNKNOWN_TO_SDK_VERSION. The raw value returned by the service is available from returnValuesOnConditionCheckFailureAsString().

        Returns:
        An optional parameter that returns the item attributes for a DeleteItem operation that failed a condition check.

        There is no additional cost associated with requesting a return value aside from the small network and processing overhead of receiving a larger response. No read capacity units are consumed.

        See Also:
        ReturnValuesOnConditionCheckFailure

      • toString

        public final String toString()
        Returns a string representation of this object. This is useful for testing and debugging. Sensitive data will be redacted from this string using a placeholder value.
        Overrides:
        toString in class Object