FilterSpecification

Gets and sets the property ExpressionAttributeNames.

One or more substitution tokens for attribute names in an expression. For more information, see Expression Attribute Names in the Amazon DynamoDB Developer Guide.

Starting with version 4 of the SDK this property will default to null. If no data for this property is returned from the service the property will also be null. This was changed to improve performance and allow the SDK and caller to distinguish between a property not set or a property being empty to clear out a value. To retain the previous SDK behavior set the AWSConfigs.InitializeCollections static property to true.

Gets and sets the property ExpressionAttributeValues.

One or more values that can be substituted in an expression. For more information, see Expression Attribute Values in the Amazon DynamoDB Developer Guide.

Starting with version 4 of the SDK this property will default to null. If no data for this property is returned from the service the property will also be null. This was changed to improve performance and allow the SDK and caller to distinguish between a property not set or a property being empty to clear out a value. To retain the previous SDK behavior set the AWSConfigs.InitializeCollections static property to true.

Gets and sets the property FilterExpression.

A condition that filters which items are included in the export. This parameter uses the same syntax as FilterExpression in Query and Scan. If you don't provide KeyConditionExpression, this expression can also reference key attributes. If you don't specify this parameter, all items are included in the export.

Gets and sets the property KeyConditionExpression.

A condition expression that filters items by key values. The expression must test equality on a single partition key value and can optionally compare a sort key value. This parameter uses the same syntax as KeyConditionExpression in Query. When you provide this parameter, FilterExpression can only reference non-key attributes. If you don't specify this parameter, all items are eligible for export.

Gets and sets the property ProjectionExpression.

The attributes you want to retrieve for items included in the export. Separate attribute names in the expression with commas. If you don't specify this parameter, all attributes are returned.