FRTc@sddlmZddlZddlmZddlmZddlmZddl m Z ddl m Z defd YZ dS( i(tcrc32N(tjson(tAWSQueryConnection(t RegionInfo(tJSONResponseError(t exceptionstDynamoDBConnectioncBseZdZdZdZdZdZdZeZ ie j d6e j d6e j d6e jd 6e jd 6e jd 6e jd 6Zd ZdZdZedZeedZeedZeeeeeeeedZdZdZeeeeedZeedZeeeeeeeedZeeeeeeeeeeeeeedZ eeeeeeeeeeeeed Z!eeeeeeeeeed Z"eedZ#dZ$dZ%dZ&RS( s` Amazon DynamoDB **Overview** This is the Amazon DynamoDB API Reference. This guide provides descriptions and samples of the low-level DynamoDB API. For information about DynamoDB application development, go to the `Amazon DynamoDB Developer Guide`_. Instead of making the requests to the low-level DynamoDB API directly from your application, we recommend that you use the AWS Software Development Kits (SDKs). The easy-to-use libraries in the AWS SDKs make it unnecessary to call the low-level DynamoDB API directly from your application. The libraries take care of request authentication, serialization, and connection management. For more information, go to `Using the AWS SDKs with DynamoDB`_ in the Amazon DynamoDB Developer Guide . If you decide to code against the low-level DynamoDB API directly, you will need to write the necessary code to authenticate your requests. For more information on signing your requests, go to `Using the DynamoDB API`_ in the Amazon DynamoDB Developer Guide . The following are short descriptions of each low-level API action, organized by function. **Managing Tables** + CreateTable - Creates a table with user-specified provisioned throughput settings. You must designate one attribute as the hash primary key for the table; you can optionally designate a second attribute as the range primary key. DynamoDB creates indexes on these key attributes for fast data access. Optionally, you can create one or more secondary indexes, which provide fast data access using non-key attributes. + DescribeTable - Returns metadata for a table, such as table size, status, and index information. + UpdateTable - Modifies the provisioned throughput settings for a table. Optionally, you can modify the provisioned throughput settings for global secondary indexes on the table. + ListTables - Returns a list of all tables associated with the current AWS account and endpoint. + DeleteTable - Deletes a table and all of its indexes. For conceptual information about managing tables, go to `Working with Tables`_ in the Amazon DynamoDB Developer Guide . **Reading Data** + GetItem - Returns a set of attributes for the item that has a given primary key. By default, GetItem performs an eventually consistent read; however, applications can specify a strongly consistent read instead. + BatchGetItem - Performs multiple GetItem requests for data items using their primary keys, from one table or multiple tables. The response from BatchGetItem has a size limit of 16 MB and returns a maximum of 100 items. Both eventually consistent and strongly consistent reads can be used. + Query - Returns one or more items from a table or a secondary index. You must provide a specific hash key value. You can narrow the scope of the query using comparison operators against a range key value, or on the index key. Query supports either eventual or strong consistency. A single response has a size limit of 1 MB. + Scan - Reads every item in a table; the result set is eventually consistent. You can limit the number of items returned by filtering the data attributes, using conditional expressions. Scan can be used to enable ad-hoc querying of a table against non-key attributes; however, since this is a full table scan without using an index, Scan should not be used for any application query use case that requires predictable performance. For conceptual information about reading data, go to `Working with Items`_ and `Query and Scan Operations`_ in the Amazon DynamoDB Developer Guide . **Modifying Data** + PutItem - Creates a new item, or replaces an existing item with a new item (including all the attributes). By default, if an item in the table already exists with the same primary key, the new item completely replaces the existing item. You can use conditional operators to replace an item only if its attribute values match certain conditions, or to insert a new item only if that item doesn't already exist. + UpdateItem - Modifies the attributes of an existing item. You can also use conditional operators to perform an update only if the item's attribute values match certain conditions. + DeleteItem - Deletes an item in a table by primary key. You can use conditional operators to perform a delete an item only if the item's attribute values match certain conditions. + BatchWriteItem - Performs multiple PutItem and DeleteItem requests across multiple tables in a single request. A failure of any request(s) in the batch will not cause the entire BatchWriteItem operation to fail. Supports batches of up to 25 items to put or delete, with a maximum total request size of 16 MB. For conceptual information about modifying data, go to `Working with Items`_ and `Query and Scan Operations`_ in the Amazon DynamoDB Developer Guide . s 2012-08-10s us-east-1s dynamodb.us-east-1.amazonaws.comtDynamoDBtDynamoDB_20120810t&ProvisionedThroughputExceededExceptiontLimitExceededExceptiontConditionalCheckFailedExceptiontResourceInUseExceptiontResourceNotFoundExceptiontInternalServerErrort(ItemCollectionSizeLimitExceededExceptioni cKs|jdd}|jdt}|s{tjjdd|j}x3tjjD]}|j |krU|}PqUqUWnd|kr|j |d
  • + `NE` : Not equal. `NE` is supported for all datatypes, including lists and maps. AttributeValueList can contain only one AttributeValue of type String, Number, Binary, String Set, Number Set, or Binary Set. If an item contains an AttributeValue of a different type than the one specified in the request, the value does not match. For example, `{"S":"6"}` does not equal `{"N":"6"}`. Also, `{"N":"6"}` does not equal `{"NS":["6", "2", "1"]}`. >
  • + `LE` : Less than or equal. AttributeValueList can contain only one AttributeValue element of type String, Number, or Binary (not a set type). If an item contains an AttributeValue element of a different type than the one specified in the request, the value does not match. For example, `{"S":"6"}` does not equal `{"N":"6"}`. Also, `{"N":"6"}` does not compare to `{"NS":["6", "2", "1"]}`. >
  • + `LT` : Less than. AttributeValueList can contain only one AttributeValue of type String, Number, or Binary (not a set type). If an item contains an AttributeValue element of a different type than the one specified in the request, the value does not match. For example, `{"S":"6"}` does not equal `{"N":"6"}`. Also, `{"N":"6"}` does not compare to `{"NS":["6", "2", "1"]}`. >
  • + `GE` : Greater than or equal. AttributeValueList can contain only one AttributeValue element of type String, Number, or Binary (not a set type). If an item contains an AttributeValue element of a different type than the one specified in the request, the value does not match. For example, `{"S":"6"}` does not equal `{"N":"6"}`. Also, `{"N":"6"}` does not compare to `{"NS":["6", "2", "1"]}`. >
  • + `GT` : Greater than. AttributeValueList can contain only one AttributeValue element of type String, Number, or Binary (not a set type). If an item contains an AttributeValue element of a different type than the one specified in the request, the value does not match. For example, `{"S":"6"}` does not equal `{"N":"6"}`. Also, `{"N":"6"}` does not compare to `{"NS":["6", "2", "1"]}`. >
  • + `NOT_NULL` : The attribute exists. `NOT_NULL` is supported for all datatypes, including lists and maps. + `NULL` : The attribute does not exist. `NULL` is supported for all datatypes, including lists and maps. + `CONTAINS` : Checks for a subsequence, or value in a set. AttributeValueList can contain only one AttributeValue element of type String, Number, or Binary (not a set type). If the target attribute of the comparison is of type String, then the operator checks for a substring match. If the target attribute of the comparison is of type Binary, then the operator looks for a subsequence of the target that matches the input. If the target attribute of the comparison is a set (" `SS`", " `NS`", or " `BS`"), then the operator evaluates to true if it finds an exact match with any member of the set. CONTAINS is supported for lists: When evaluating " `a CONTAINS b`", " `a`" can be a list; however, " `b`" cannot be a set, a map, or a list. + `NOT_CONTAINS` : Checks for absence of a subsequence, or absence of a value in a set. AttributeValueList can contain only one AttributeValue element of type String, Number, or Binary (not a set type). If the target attribute of the comparison is a String, then the operator checks for the absence of a substring match. If the target attribute of the comparison is Binary, then the operator checks for the absence of a subsequence of the target that matches the input. If the target attribute of the comparison is a set (" `SS`", " `NS`", or " `BS`"), then the operator evaluates to true if it does not find an exact match with any member of the set. NOT_CONTAINS is supported for lists: When evaluating " `a NOT CONTAINS b`", " `a`" can be a list; however, " `b`" cannot be a set, a map, or a list. + `BEGINS_WITH` : Checks for a prefix. AttributeValueList can contain only one AttributeValue of type String or Binary (not a Number or a set type). The target attribute of the comparison must be of type String or Binary (not a Number or a set type). >
  • + `IN` : Checks for matching elements within two sets. AttributeValueList can contain one or more AttributeValue elements of type String, Number, or Binary (not a set type). These attributes are compared against an existing set type attribute of an item. If any elements of the input set are present in the item attribute, the expression evaluates to true. + `BETWEEN` : Greater than or equal to the first value, and less than or equal to the second value. AttributeValueList must contain two AttributeValue elements of the same type, either String, Number, or Binary (not a set type). A target attribute matches if the target value is greater than, or equal to, the first element and less than, or equal to, the second element. If an item contains an AttributeValue element of a different type than the one specified in the request, the value does not match. For example, `{"S":"6"}` does not compare to `{"N":"6"}`. Also, `{"N":"6"}` does not compare to `{"NS":["6", "2", "1"]}` For usage examples of AttributeValueList and ComparisonOperator , see `Legacy Conditional Parameters`_ in the Amazon DynamoDB Developer Guide . For backward compatibility with previous DynamoDB releases, the following parameters can be used instead of AttributeValueList and ComparisonOperator : + Value - A value for DynamoDB to compare with an attribute. + Exists - A Boolean value that causes DynamoDB to evaluate the value before attempting the conditional operation: + If Exists is `True`, DynamoDB will check to see if that attribute value already exists in the table. If it is found, then the condition evaluates to true; otherwise the condition evaluate to false. + If Exists is `False`, DynamoDB assumes that the attribute value does not exist in the table. If in fact the value does not exist, then the assumption is valid and the condition evaluates to true. If the value is found, despite the assumption that it does not exist, the condition evaluates to false. The Value and Exists parameters are incompatible with AttributeValueList and ComparisonOperator . Note that if you use both sets of parameters at once, DynamoDB will return a ValidationException exception. :type conditional_operator: string :param conditional_operator: There is a newer parameter available. Use ConditionExpression instead. Note that if you use ConditionalOperator and ConditionExpression at the same time, DynamoDB will return a ValidationException exception. This parameter does not support lists or maps. A logical operator to apply to the conditions in the Expected map: + `AND` - If all of the conditions evaluate to true, then the entire map evaluates to true. + `OR` - If at least one of the conditions evaluate to true, then the entire map evaluates to true. If you omit ConditionalOperator , then `AND` is the default. The operation will succeed only if the entire map evaluates to true. :type return_values: string :param return_values: 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. :type return_consumed_capacity: string :param return_consumed_capacity: A value that if set to `TOTAL`, the response includes ConsumedCapacity data for tables and indexes. If set to `INDEXES`, the response includes ConsumedCapacity for indexes. If set to `NONE` (the default), ConsumedCapacity is not included in the response. :type return_item_collection_metrics: string :param return_item_collection_metrics: A value that 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. :type condition_expression: string :param condition_expression: A condition that must be satisfied in order for a conditional DeleteItem to succeed. An expression can contain any of the following: + Boolean functions: `ATTRIBUTE_EXIST | CONTAINS | BEGINS_WITH` + Comparison operators: ` = | <> | < | > | <= | >= | BETWEEN | IN` + Logical operators: `NOT | AND | OR` :type expression_attribute_names: map :param expression_attribute_names: One or more substitution tokens for simplifying complex expressions. The following are some use cases for an ExpressionAttributeNames value: + To shorten an attribute name that is very long or unwieldy in an expression. + 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 expression: + `order.customerInfo.LastName = "Smith" OR order.customerInfo.LastName = "Jones"` Now suppose that you specified the following for ExpressionAttributeNames : + `{"n":"order.customerInfo.LastName"}` The expression can now be simplified as follows: + `#n = "Smith" OR #n = "Jones"` :type expression_attribute_values: map :param expression_attribute_values: One or more values that can be substituted in an expression. Use the **:** character in an expression to dereference an attribute value. For example, consider the following expression: + `ProductStatus IN ("Available","Backordered","Discontinued")` Now suppose that you specified the following for ExpressionAttributeValues : + `{ "a":{"S":"Available"}, "b":{"S":"Backordered"}, "d":{"S":"Discontinued"} }` The expression can now be simplified as follows: + `ProductStatus IN (:a,:b,:c)` R8tKeytExpectedtConditionalOperatort ReturnValuesR)R3tConditionExpressiontExpressionAttributeNamestExpressionAttributeValuesR*t DeleteItemR,(RR-RR.( R#R?tkeytexpectedtconditional_operatort return_valuesR0R5tcondition_expressiontexpression_attribute_namestexpression_attribute_valuesR1((sB/opt/freeware/lib/python2.7/site-packages/boto/dynamodb2/layer1.pyt delete_item5s(H                cCs,i|d6}|jdddtj|S(s4 The DeleteTable operation deletes a table and all of its items. After a DeleteTable request, the specified table is in the `DELETING` state until DynamoDB completes the deletion. If the table is in the `ACTIVE` state, you can delete it. If a table is in `CREATING` or `UPDATING` states, then DynamoDB returns a ResourceInUseException . If the specified table does not exist, DynamoDB returns a ResourceNotFoundException . If table is already in the `DELETING` state, no error is returned. When you delete a table, any indexes on that table are also deleted. Use the DescribeTable API to check the status of the table. :type table_name: string :param table_name: The name of the table to delete. R8R*t DeleteTableR,(R-RR.(R#R?R1((sB/opt/freeware/lib/python2.7/site-packages/boto/dynamodb2/layer1.pyt delete_tables cCs,i|d6}|jdddtj|S(s Returns information about the table, including the current status of the table, when it was created, the primary key schema, and any indexes on the table. :type table_name: string :param table_name: The name of the table to describe. R8R*t DescribeTableR,(R-RR.(R#R?R1((sB/opt/freeware/lib/python2.7/site-packages/boto/dynamodb2/layer1.pytdescribe_tables c Csi|d6|d6}|d k r-||d
  • + `NE` : Not equal. `NE` is supported for all datatypes, including lists and maps. AttributeValueList can contain only one AttributeValue of type String, Number, Binary, String Set, Number Set, or Binary Set. If an item contains an AttributeValue of a different type than the one specified in the request, the value does not match. For example, `{"S":"6"}` does not equal `{"N":"6"}`. Also, `{"N":"6"}` does not equal `{"NS":["6", "2", "1"]}`. >
  • + `LE` : Less than or equal. AttributeValueList can contain only one AttributeValue element of type String, Number, or Binary (not a set type). If an item contains an AttributeValue element of a different type than the one specified in the request, the value does not match. For example, `{"S":"6"}` does not equal `{"N":"6"}`. Also, `{"N":"6"}` does not compare to `{"NS":["6", "2", "1"]}`. >
  • + `LT` : Less than. AttributeValueList can contain only one AttributeValue of type String, Number, or Binary (not a set type). If an item contains an AttributeValue element of a different type than the one specified in the request, the value does not match. For example, `{"S":"6"}` does not equal `{"N":"6"}`. Also, `{"N":"6"}` does not compare to `{"NS":["6", "2", "1"]}`. >
  • + `GE` : Greater than or equal. AttributeValueList can contain only one AttributeValue element of type String, Number, or Binary (not a set type). If an item contains an AttributeValue element of a different type than the one specified in the request, the value does not match. For example, `{"S":"6"}` does not equal `{"N":"6"}`. Also, `{"N":"6"}` does not compare to `{"NS":["6", "2", "1"]}`. >
  • + `GT` : Greater than. AttributeValueList can contain only one AttributeValue element of type String, Number, or Binary (not a set type). If an item contains an AttributeValue element of a different type than the one specified in the request, the value does not match. For example, `{"S":"6"}` does not equal `{"N":"6"}`. Also, `{"N":"6"}` does not compare to `{"NS":["6", "2", "1"]}`. >
  • + `NOT_NULL` : The attribute exists. `NOT_NULL` is supported for all datatypes, including lists and maps. + `NULL` : The attribute does not exist. `NULL` is supported for all datatypes, including lists and maps. + `CONTAINS` : Checks for a subsequence, or value in a set. AttributeValueList can contain only one AttributeValue element of type String, Number, or Binary (not a set type). If the target attribute of the comparison is of type String, then the operator checks for a substring match. If the target attribute of the comparison is of type Binary, then the operator looks for a subsequence of the target that matches the input. If the target attribute of the comparison is a set (" `SS`", " `NS`", or " `BS`"), then the operator evaluates to true if it finds an exact match with any member of the set. CONTAINS is supported for lists: When evaluating " `a CONTAINS b`", " `a`" can be a list; however, " `b`" cannot be a set, a map, or a list. + `NOT_CONTAINS` : Checks for absence of a subsequence, or absence of a value in a set. AttributeValueList can contain only one AttributeValue element of type String, Number, or Binary (not a set type). If the target attribute of the comparison is a String, then the operator checks for the absence of a substring match. If the target attribute of the comparison is Binary, then the operator checks for the absence of a subsequence of the target that matches the input. If the target attribute of the comparison is a set (" `SS`", " `NS`", or " `BS`"), then the operator evaluates to true if it does not find an exact match with any member of the set. NOT_CONTAINS is supported for lists: When evaluating " `a NOT CONTAINS b`", " `a`" can be a list; however, " `b`" cannot be a set, a map, or a list. + `BEGINS_WITH` : Checks for a prefix. AttributeValueList can contain only one AttributeValue of type String or Binary (not a Number or a set type). The target attribute of the comparison must be of type String or Binary (not a Number or a set type). >
  • + `IN` : Checks for matching elements within two sets. AttributeValueList can contain one or more AttributeValue elements of type String, Number, or Binary (not a set type). These attributes are compared against an existing set type attribute of an item. If any elements of the input set are present in the item attribute, the expression evaluates to true. + `BETWEEN` : Greater than or equal to the first value, and less than or equal to the second value. AttributeValueList must contain two AttributeValue elements of the same type, either String, Number, or Binary (not a set type). A target attribute matches if the target value is greater than, or equal to, the first element and less than, or equal to, the second element. If an item contains an AttributeValue element of a different type than the one specified in the request, the value does not match. For example, `{"S":"6"}` does not compare to `{"N":"6"}`. Also, `{"N":"6"}` does not compare to `{"NS":["6", "2", "1"]}` For usage examples of AttributeValueList and ComparisonOperator , see `Legacy Conditional Parameters`_ in the Amazon DynamoDB Developer Guide . For backward compatibility with previous DynamoDB releases, the following parameters can be used instead of AttributeValueList and ComparisonOperator : + Value - A value for DynamoDB to compare with an attribute. + Exists - A Boolean value that causes DynamoDB to evaluate the value before attempting the conditional operation: + If Exists is `True`, DynamoDB will check to see if that attribute value already exists in the table. If it is found, then the condition evaluates to true; otherwise the condition evaluate to false. + If Exists is `False`, DynamoDB assumes that the attribute value does not exist in the table. If in fact the value does not exist, then the assumption is valid and the condition evaluates to true. If the value is found, despite the assumption that it does not exist, the condition evaluates to false. The Value and Exists parameters are incompatible with AttributeValueList and ComparisonOperator . Note that if you use both sets of parameters at once, DynamoDB will return a ValidationException exception. :type return_values: string :param return_values: Use ReturnValues if you want to get the item attributes as they appeared before they were updated with the PutItem request. For PutItem , 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` - If PutItem overwrote an attribute name-value pair, then the content of the old item is returned. :type return_consumed_capacity: string :param return_consumed_capacity: A value that if set to `TOTAL`, the response includes ConsumedCapacity data for tables and indexes. If set to `INDEXES`, the response includes ConsumedCapacity for indexes. If set to `NONE` (the default), ConsumedCapacity is not included in the response. :type return_item_collection_metrics: string :param return_item_collection_metrics: A value that 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. :type conditional_operator: string :param conditional_operator: There is a newer parameter available. Use ConditionExpression instead. Note that if you use ConditionalOperator and ConditionExpression at the same time, DynamoDB will return a ValidationException exception. This parameter does not support lists or maps. A logical operator to apply to the conditions in the Expected map: + `AND` - If all of the conditions evaluate to true, then the entire map evaluates to true. + `OR` - If at least one of the conditions evaluate to true, then the entire map evaluates to true. If you omit ConditionalOperator , then `AND` is the default. The operation will succeed only if the entire map evaluates to true. :type condition_expression: string :param condition_expression: A condition that must be satisfied in order for a conditional PutItem operation to succeed. An expression can contain any of the following: + Boolean functions: `ATTRIBUTE_EXIST | CONTAINS | BEGINS_WITH` + Comparison operators: ` = | <> | < | > | <= | >= | BETWEEN | IN` + Logical operators: `NOT | AND | OR` :type expression_attribute_names: map :param expression_attribute_names: One or more substitution tokens for simplifying complex expressions. The following are some use cases for an ExpressionAttributeNames value: + To shorten an attribute name that is very long or unwieldy in an expression. + 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 expression: + `order.customerInfo.LastName = "Smith" OR order.customerInfo.LastName = "Jones"` Now suppose that you specified the following for ExpressionAttributeNames : + `{"n":"order.customerInfo.LastName"}` The expression can now be simplified as follows: + `#n = "Smith" OR #n = "Jones"` :type expression_attribute_values: map :param expression_attribute_values: One or more values that can be substituted in an expression. Use the **:** character in an expression to dereference an attribute value. For example, consider the following expression: + `ProductStatus IN ("Available","Backordered","Discontinued")` Now suppose that you specified the following for ExpressionAttributeValues : + `{ "a":{"S":"Available"}, "b":{"S":"Backordered"}, "d":{"S":"Discontinued"} }` The expression can now be simplified as follows: + `ProductStatus IN (:a,:b,:c)` R8tItemRFRHR)R3RGRIRJRKR*tPutItemR,(RR-RR.( R#R?titemRNRPR0R5RORQRRRSR1((sB/opt/freeware/lib/python2.7/site-packages/boto/dynamodb2/layer1.pytput_itemDs(\                cCsi|d6|d6}|tk r-||d
  • + `LT` : Less than. AttributeValueList can contain only one AttributeValue of type String, Number, or Binary (not a set type). If an item contains an AttributeValue element of a different type than the one specified in the request, the value does not match. For example, `{"S":"6"}` does not equal `{"N":"6"}`. Also, `{"N":"6"}` does not compare to `{"NS":["6", "2", "1"]}`. >
  • + `GE` : Greater than or equal. AttributeValueList can contain only one AttributeValue element of type String, Number, or Binary (not a set type). If an item contains an AttributeValue element of a different type than the one specified in the request, the value does not match. For example, `{"S":"6"}` does not equal `{"N":"6"}`. Also, `{"N":"6"}` does not compare to `{"NS":["6", "2", "1"]}`. >
  • + `GT` : Greater than. AttributeValueList can contain only one AttributeValue element of type String, Number, or Binary (not a set type). If an item contains an AttributeValue element of a different type than the one specified in the request, the value does not match. For example, `{"S":"6"}` does not equal `{"N":"6"}`. Also, `{"N":"6"}` does not compare to `{"NS":["6", "2", "1"]}`. >
  • + `BEGINS_WITH` : Checks for a prefix. AttributeValueList can contain only one AttributeValue of type String or Binary (not a Number or a set type). The target attribute of the comparison must be of type String or Binary (not a Number or a set type). >
  • + `BETWEEN` : Greater than or equal to the first value, and less than or equal to the second value. AttributeValueList must contain two AttributeValue elements of the same type, either String, Number, or Binary (not a set type). A target attribute matches if the target value is greater than, or equal to, the first element and less than, or equal to, the second element. If an item contains an AttributeValue element of a different type than the one specified in the request, the value does not match. For example, `{"S":"6"}` does not compare to `{"N":"6"}`. Also, `{"N":"6"}` does not compare to `{"NS":["6", "2", "1"]}` For usage examples of AttributeValueList and ComparisonOperator , see `Legacy Conditional Parameters`_ in the Amazon DynamoDB Developer Guide . :type query_filter: map :param query_filter: There is a newer parameter available. Use FilterExpression instead. Note that if you use QueryFilter and FilterExpression at the same time, DynamoDB will return a ValidationException exception. This parameter does not support lists or maps. A condition that evaluates the query results and returns only the desired values. If you specify more than one condition in the QueryFilter map, then by default all of the conditions must evaluate to true. In other words, the conditions are ANDed together. (You can use the ConditionalOperator parameter to OR the conditions instead. If you do this, then at least one of the conditions must evaluate to true, rather than all of them.) Each QueryFilter element consists of an attribute name to compare, along with the following: + AttributeValueList - One or more values to evaluate against the supplied attribute. The number of values in the list depends on the operator specified in ComparisonOperator . For type Number, value comparisons are numeric. String value comparisons for greater than, equals, or less than are based on ASCII character code values. For example, `a` is greater than `A`, and `aa` is greater than `B`. For a list of code values, see `http://en.wikipedia.org/wiki/ASCII#ASCII_printable_characters`_. For type Binary, DynamoDB treats each byte of the binary data as unsigned when it compares binary values, for example when evaluating query expressions. For information on specifying data types in JSON, see `JSON Data Format`_ in the Amazon DynamoDB Developer Guide . + ComparisonOperator - A comparator for evaluating attributes. For example, equals, greater than, less than, etc. The following comparison operators are available: `EQ | NE | LE | LT | GE | GT | NOT_NULL | NULL | CONTAINS | NOT_CONTAINS | BEGINS_WITH | IN | BETWEEN` For complete descriptions of all comparison operators, see `API_Condition.html`_. :type conditional_operator: string :param conditional_operator: There is a newer parameter available. Use ConditionExpression instead. Note that if you use ConditionalOperator and ConditionExpression at the same time, DynamoDB will return a ValidationException exception. This parameter does not support lists or maps. A logical operator to apply to the conditions in the QueryFilter map: + `AND` - If all of the conditions evaluate to true, then the entire map evaluates to true. + `OR` - If at least one of the conditions evaluate to true, then the entire map evaluates to true. If you omit ConditionalOperator , then `AND` is the default. The operation will succeed only if the entire map evaluates to true. :type scan_index_forward: boolean :param scan_index_forward: A value that specifies ascending (true) or descending (false) traversal of the index. DynamoDB returns results reflecting the requested order determined by the range key. If the data type is Number, the results are returned in numeric order. For type String, the results are returned in order of ASCII character code values. For type Binary, DynamoDB treats each byte of the binary data as unsigned when it compares binary values. If ScanIndexForward is not specified, the results are returned in ascending order. :type exclusive_start_key: map :param exclusive_start_key: The primary key of the first item that this operation will evaluate. Use the value that was returned for LastEvaluatedKey in the previous operation. The data type for ExclusiveStartKey must be String, Number or Binary. No set data types are allowed. :type return_consumed_capacity: string :param return_consumed_capacity: A value that if set to `TOTAL`, the response includes ConsumedCapacity data for tables and indexes. If set to `INDEXES`, the response includes ConsumedCapacity for indexes. If set to `NONE` (the default), ConsumedCapacity is not included in the response. :type projection_expression: string :param projection_expression: One or more attributes to retrieve from the table. These attributes can include scalars, sets, or elements of a JSON document. The attributes in the expression must be separated by commas. If no attribute names are specified, then all attributes will be returned. If any of the requested attributes are not found, they will not appear in the result. :type filter_expression: string :param filter_expression: A condition that evaluates the query results and returns only the desired values. The condition you specify is applied to the items queried; any items that do not match the expression are not returned. :type expression_attribute_names: map :param expression_attribute_names: One or more substitution tokens for simplifying complex expressions. The following are some use cases for an ExpressionAttributeNames value: + To shorten an attribute name that is very long or unwieldy in an expression. + 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 expression: + `order.customerInfo.LastName = "Smith" OR order.customerInfo.LastName = "Jones"` Now suppose that you specified the following for ExpressionAttributeNames : + `{"n":"order.customerInfo.LastName"}` The expression can now be simplified as follows: + `#n = "Smith" OR #n = "Jones"` :type expression_attribute_values: map :param expression_attribute_values: One or more values that can be substituted in an expression. Use the **:** character in an expression to dereference an attribute value. For example, consider the following expression: + `ProductStatus IN ("Available","Backordered","Discontinued")` Now suppose that you specified the following for ExpressionAttributeValues : + `{ "a":{"S":"Available"}, "b":{"S":"Backordered"}, "d":{"S":"Discontinued"} }` The expression can now be simplified as follows: + `ProductStatus IN (:a,:b,:c)` R8t KeyConditionst IndexNametSelectRYRbRZt QueryFilterRGtScanIndexForwardtExclusiveStartKeyR)R[tFilterExpressionRJRKR*tQueryR,(RR-RR.(R#R?tkey_conditionst index_nametselectR]ReR^t query_filterROtscan_index_forwardtexclusive_start_keyR0R_tfilter_expressionRRRSR1((sB/opt/freeware/lib/python2.7/site-packages/boto/dynamodb2/layer1.pytquerysD                             cCsqi|d6}|tk r&||d
  • + `NE` : Not equal. `NE` is supported for all datatypes, including lists and maps. AttributeValueList can contain only one AttributeValue of type String, Number, Binary, String Set, Number Set, or Binary Set. If an item contains an AttributeValue of a different type than the one specified in the request, the value does not match. For example, `{"S":"6"}` does not equal `{"N":"6"}`. Also, `{"N":"6"}` does not equal `{"NS":["6", "2", "1"]}`. >
  • + `LE` : Less than or equal. AttributeValueList can contain only one AttributeValue element of type String, Number, or Binary (not a set type). If an item contains an AttributeValue element of a different type than the one specified in the request, the value does not match. For example, `{"S":"6"}` does not equal `{"N":"6"}`. Also, `{"N":"6"}` does not compare to `{"NS":["6", "2", "1"]}`. >
  • + `LT` : Less than. AttributeValueList can contain only one AttributeValue of type String, Number, or Binary (not a set type). If an item contains an AttributeValue element of a different type than the one specified in the request, the value does not match. For example, `{"S":"6"}` does not equal `{"N":"6"}`. Also, `{"N":"6"}` does not compare to `{"NS":["6", "2", "1"]}`. >
  • + `GE` : Greater than or equal. AttributeValueList can contain only one AttributeValue element of type String, Number, or Binary (not a set type). If an item contains an AttributeValue element of a different type than the one specified in the request, the value does not match. For example, `{"S":"6"}` does not equal `{"N":"6"}`. Also, `{"N":"6"}` does not compare to `{"NS":["6", "2", "1"]}`. >
  • + `GT` : Greater than. AttributeValueList can contain only one AttributeValue element of type String, Number, or Binary (not a set type). If an item contains an AttributeValue element of a different type than the one specified in the request, the value does not match. For example, `{"S":"6"}` does not equal `{"N":"6"}`. Also, `{"N":"6"}` does not compare to `{"NS":["6", "2", "1"]}`. >
  • + `NOT_NULL` : The attribute exists. `NOT_NULL` is supported for all datatypes, including lists and maps. + `NULL` : The attribute does not exist. `NULL` is supported for all datatypes, including lists and maps. + `CONTAINS` : Checks for a subsequence, or value in a set. AttributeValueList can contain only one AttributeValue element of type String, Number, or Binary (not a set type). If the target attribute of the comparison is of type String, then the operator checks for a substring match. If the target attribute of the comparison is of type Binary, then the operator looks for a subsequence of the target that matches the input. If the target attribute of the comparison is a set (" `SS`", " `NS`", or " `BS`"), then the operator evaluates to true if it finds an exact match with any member of the set. CONTAINS is supported for lists: When evaluating " `a CONTAINS b`", " `a`" can be a list; however, " `b`" cannot be a set, a map, or a list. + `NOT_CONTAINS` : Checks for absence of a subsequence, or absence of a value in a set. AttributeValueList can contain only one AttributeValue element of type String, Number, or Binary (not a set type). If the target attribute of the comparison is a String, then the operator checks for the absence of a substring match. If the target attribute of the comparison is Binary, then the operator checks for the absence of a subsequence of the target that matches the input. If the target attribute of the comparison is a set (" `SS`", " `NS`", or " `BS`"), then the operator evaluates to true if it does not find an exact match with any member of the set. NOT_CONTAINS is supported for lists: When evaluating " `a NOT CONTAINS b`", " `a`" can be a list; however, " `b`" cannot be a set, a map, or a list. + `BEGINS_WITH` : Checks for a prefix. AttributeValueList can contain only one AttributeValue of type String or Binary (not a Number or a set type). The target attribute of the comparison must be of type String or Binary (not a Number or a set type). >
  • + `IN` : Checks for matching elements within two sets. AttributeValueList can contain one or more AttributeValue elements of type String, Number, or Binary (not a set type). These attributes are compared against an existing set type attribute of an item. If any elements of the input set are present in the item attribute, the expression evaluates to true. + `BETWEEN` : Greater than or equal to the first value, and less than or equal to the second value. AttributeValueList must contain two AttributeValue elements of the same type, either String, Number, or Binary (not a set type). A target attribute matches if the target value is greater than, or equal to, the first element and less than, or equal to, the second element. If an item contains an AttributeValue element of a different type than the one specified in the request, the value does not match. For example, `{"S":"6"}` does not compare to `{"N":"6"}`. Also, `{"N":"6"}` does not compare to `{"NS":["6", "2", "1"]}` For usage examples of AttributeValueList and ComparisonOperator , see `Legacy Conditional Parameters`_ in the Amazon DynamoDB Developer Guide . For backward compatibility with previous DynamoDB releases, the following parameters can be used instead of AttributeValueList and ComparisonOperator : + Value - A value for DynamoDB to compare with an attribute. + Exists - A Boolean value that causes DynamoDB to evaluate the value before attempting the conditional operation: + If Exists is `True`, DynamoDB will check to see if that attribute value already exists in the table. If it is found, then the condition evaluates to true; otherwise the condition evaluate to false. + If Exists is `False`, DynamoDB assumes that the attribute value does not exist in the table. If in fact the value does not exist, then the assumption is valid and the condition evaluates to true. If the value is found, despite the assumption that it does not exist, the condition evaluates to false. The Value and Exists parameters are incompatible with AttributeValueList and ComparisonOperator . Note that if you use both sets of parameters at once, DynamoDB will return a ValidationException exception. :type conditional_operator: string :param conditional_operator: There is a newer parameter available. Use ConditionExpression instead. Note that if you use ConditionalOperator and ConditionExpression at the same time, DynamoDB will return a ValidationException exception. This parameter does not support lists or maps. A logical operator to apply to the conditions in the Expected map: + `AND` - If all of the conditions evaluate to true, then the entire map evaluates to true. + `OR` - If at least one of the conditions evaluate to true, then the entire map evaluates to true. If you omit ConditionalOperator , then `AND` is the default. The operation will succeed only if the entire map evaluates to true. :type return_values: string :param return_values: Use ReturnValues if you want to get the item attributes as they appeared either before or after they were updated. For UpdateItem , 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` - If UpdateItem overwrote an attribute name-value pair, then the content of the old item is returned. + `UPDATED_OLD` - The old versions of only the updated attributes are returned. + `ALL_NEW` - All of the attributes of the new version of the item are returned. + `UPDATED_NEW` - The new versions of only the updated attributes are returned. :type return_consumed_capacity: string :param return_consumed_capacity: A value that if set to `TOTAL`, the response includes ConsumedCapacity data for tables and indexes. If set to `INDEXES`, the response includes ConsumedCapacity for indexes. If set to `NONE` (the default), ConsumedCapacity is not included in the response. :type return_item_collection_metrics: string :param return_item_collection_metrics: A value that 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. :type update_expression: string :param update_expression: An expression that defines one or more attributes to be updated, the action to be performed on them, and new value(s) for them. The following action values are available for UpdateExpression . + `SET` - Adds one or more attributes and values to an item. If any of these attribute already exist, they are replaced by the new values. You can also use `SET` to add or subtract from an attribute that is of type Number. `SET` supports the following functions: + `if_not_exists (path, operand)` - if the item does not contain an attribute at the specified path, then `if_not_exists` evaluates to operand; otherwise, it evaluates to path. You can use this function to avoid overwriting an attribute that may already be present in the item. + `list_append (operand, operand)` - evaluates to a list with a new element added to it. You can append the new element to the start or the end of the list by reversing the order of the operands. These function names are case-sensitive. + `REMOVE` - Removes one or more attributes from an item. + `ADD` - Adds the specified value to the item, if the attribute does not already exist. If the attribute does exist, then the behavior of `ADD` depends on the data type of the attribute: + If the existing attribute is a number, and if Value is also a number, then Value is mathematically added to the existing attribute. If Value is a negative number, then it is subtracted from the existing attribute. + If the existing data type is a set and if Value is also a set, then Value is added to the existing set. For example, if the attribute value is the set `[1,2]`, and the `ADD` action specified `[3]`, then the final attribute value is `[1,2,3]`. An error occurs if an `ADD` action is specified for a set attribute and the attribute type specified does not match the existing set type. Both sets must have the same primitive data type. For example, if the existing data type is a set of strings, the Value must also be a set of strings. The `ADD` action only supports Number and set data types. In addition, `ADD` can only be used on top-level attributes, not nested attributes. + `DELETE` - Deletes an element from a set. If a set of values is specified, then those values are subtracted from the old set. For example, if the attribute value was the set `[a,b,c]` and the `DELETE` action specifies `[a,c]`, then the final attribute value is `[b]`. Specifying an empty set is an error. The `DELETE` action only supports Number and set data types. In addition, `DELETE` can only be used on top-level attributes, not nested attributes. You can have many actions in a single expression, such as the following: `SET a=:value1, b=:value2 DELETE :value3, :value4, :value5` An expression can contain any of the following: + Boolean functions: `ATTRIBUTE_EXIST | CONTAINS | BEGINS_WITH` + Comparison operators: ` = | <> | < | > | <= | >= | BETWEEN | IN` + Logical operators: `NOT | AND | OR` :type condition_expression: string :param condition_expression: A condition that must be satisfied in order for a conditional update to succeed. An expression can contain any of the following: + Boolean functions: `ATTRIBUTE_EXIST | CONTAINS | BEGINS_WITH` + Comparison operators: ` = | <> | < | > | <= | >= | BETWEEN | IN` + Logical operators: `NOT | AND | OR` :type expression_attribute_names: map :param expression_attribute_names: One or more substitution tokens for simplifying complex expressions. The following are some use cases for an ExpressionAttributeNames value: + To shorten an attribute name that is very long or unwieldy in an expression. + 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 expression: + `order.customerInfo.LastName = "Smith" OR order.customerInfo.LastName = "Jones"` Now suppose that you specified the following for ExpressionAttributeNames : + `{"n":"order.customerInfo.LastName"}` The expression can now be simplified as follows: + `#n = "Smith" OR #n = "Jones"` :type expression_attribute_values: map :param expression_attribute_values: One or more values that can be substituted in an expression. Use the **:** character in an expression to dereference an attribute value. For example, consider the following expression: + `ProductStatus IN ("Available","Backordered","Discontinued")` Now suppose that you specified the following for ExpressionAttributeValues : + `{ "a":{"S":"Available"}, "b":{"S":"Backordered"}, "d":{"S":"Discontinued"} }` The expression can now be simplified as follows: + `ProductStatus IN (:a,:b,:c)` R8REtAttributeUpdatesRFRGRHR)R3tUpdateExpressionRIRJRKR*t UpdateItemR,(RR-RR.(R#R?RMtattribute_updatesRNRORPR0R5tupdate_expressionRQRRRSR1((sB/opt/freeware/lib/python2.7/site-packages/boto/dynamodb2/layer1.pyt update_items0                    cCs^i|d6}|dk r&||ds