class Aws::DynamoDB::Table
Public Class Methods
@overload def initialize(name, options = {})
@param [String] name @option options [Client] :client
@overload def initialize(options = {})
@option options [required, String] :name @option options [Client] :client
# File lib/aws-sdk-dynamodb/table.rb, line 22 def initialize(*args) options = Hash === args.last ? args.pop.dup : {} @name = extract_name(args, options) @data = options.delete(:data) @client = options.delete(:client) || Client.new(options) @waiter_block_warned = false end
Public Instance Methods
Contains information about the table archive. @return [Types::ArchivalSummary]
# File lib/aws-sdk-dynamodb/table.rb, line 355 def archival_summary data[:archival_summary] end
An array of `AttributeDefinition` objects. Each of these objects describes one attribute in the table and index key schema.
Each `AttributeDefinition` object in this array is composed of:
-
`AttributeName` - The name of the attribute.
-
`AttributeType` - The data type for the attribute.
@return [Array<Types::AttributeDefinition>]
# File lib/aws-sdk-dynamodb/table.rb, line 47 def attribute_definitions data[:attribute_definitions] end
Contains the details for the read/write capacity mode. @return [Types::BillingModeSummary]
# File lib/aws-sdk-dynamodb/table.rb, line 160 def billing_mode_summary data[:billing_mode_summary] end
@return [Client]
# File lib/aws-sdk-dynamodb/table.rb, line 362 def client @client end
The date and time when the table was created, in [UNIX epoch time] format.
[1]: www.epochconverter.com/ @return [Time]
# File lib/aws-sdk-dynamodb/table.rb, line 118 def creation_date_time data[:creation_date_time] end
@return [Types::TableDescription]
Returns the data for this {Table}. Calls {Client#describe_table} if {#data_loaded?} is `false`.
# File lib/aws-sdk-dynamodb/table.rb, line 382 def data load unless @data @data end
@return [Boolean]
Returns `true` if this resource is loaded. Accessing attributes or {#data} on an unloaded resource will trigger a call to {#load}.
# File lib/aws-sdk-dynamodb/table.rb, line 390 def data_loaded? !!@data end
@example Request syntax with placeholder values
table.delete()
@param [Hash] options ({}) @return [Types::DeleteTableOutput]
# File lib/aws-sdk-dynamodb/table.rb, line 498 def delete(options = {}) options = options.merge(table_name: @name) resp = @client.delete_table(options) resp.data end
@example Request syntax with placeholder values
table.delete_item({ key: { # required "AttributeName" => "value", # value <Hash,Array,String,Numeric,Boolean,IO,Set,nil> }, expected: { "AttributeName" => { value: "value", # value <Hash,Array,String,Numeric,Boolean,IO,Set,nil> exists: false, comparison_operator: "EQ", # accepts EQ, NE, IN, LE, LT, GE, GT, BETWEEN, NOT_NULL, NULL, CONTAINS, NOT_CONTAINS, BEGINS_WITH attribute_value_list: ["value"], # value <Hash,Array,String,Numeric,Boolean,IO,Set,nil> }, }, conditional_operator: "AND", # accepts AND, OR return_values: "NONE", # accepts NONE, ALL_OLD, UPDATED_OLD, ALL_NEW, UPDATED_NEW return_consumed_capacity: "INDEXES", # accepts INDEXES, TOTAL, NONE return_item_collection_metrics: "SIZE", # accepts SIZE, NONE condition_expression: "ConditionExpression", expression_attribute_names: { "ExpressionAttributeNameVariable" => "AttributeName", }, expression_attribute_values: { "ExpressionAttributeValueVariable" => "value", # value <Hash,Array,String,Numeric,Boolean,IO,Set,nil> }, })
@param [Hash] options ({}) @option options [required, Hash<String,Types::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 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.
@option options [Hash<String,Types::ExpectedAttributeValue>] :expected
This is a legacy parameter. Use `ConditionExpression` instead. For more information, see [Expected][1] in the *Amazon DynamoDB Developer Guide*. [1]: https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/LegacyConditionalParameters.Expected.html
@option options [String] :conditional_operator
This is a legacy parameter. Use `ConditionExpression` instead. For more information, see [ConditionalOperator][1] in the *Amazon DynamoDB Developer Guide*. [1]: https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/LegacyConditionalParameters.ConditionalOperator.html
@option options [String] :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. <note markdown="1"> The `ReturnValues` parameter is used by several DynamoDB operations; however, `DeleteItem` does not recognize any values other than `NONE` or `ALL_OLD`. </note>
@option options [String] :return_consumed_capacity
Determines the level of detail about provisioned throughput consumption that is returned in the response: * `INDEXES` - The response includes the aggregate `ConsumedCapacity` for the operation, together with `ConsumedCapacity` for each table and secondary index that was accessed. Note that some operations, such as `GetItem` and `BatchGetItem`, do not access any indexes at all. In these cases, specifying `INDEXES` will only return `ConsumedCapacity` information for table(s). * `TOTAL` - The response includes only the aggregate `ConsumedCapacity` for the operation. * `NONE` - No `ConsumedCapacity` details are included in the response.
@option options [String] :return_item_collection_metrics
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.
@option options [String] :condition_expression
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][1] in the *Amazon DynamoDB Developer Guide*. [1]: https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Expressions.SpecifyingConditions.html
@option options [Hash<String,String>] :expression_attribute_names
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][1] 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` ^ <note markdown="1"> Tokens that begin with the **\:** character are *expression attribute values*, which are placeholders for the actual value at runtime. </note> For more information on expression attribute names, see [Specifying Item Attributes][2] in the *Amazon DynamoDB Developer Guide*. [1]: https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/ReservedWords.html [2]: https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Expressions.AccessingItemAttributes.html
@option options [Hash<String,Types::AttributeValue>] :expression_attribute_values
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][1] in the *Amazon DynamoDB Developer Guide*. [1]: https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Expressions.SpecifyingConditions.html
@return [Types::DeleteItemOutput]
# File lib/aws-sdk-dynamodb/table.rb, line 689 def delete_item(options = {}) options = options.merge(table_name: @name) resp = @client.delete_item(options) resp.data end
@example Request syntax with placeholder values
table.get_item({ key: { # required "AttributeName" => "value", # value <Hash,Array,String,Numeric,Boolean,IO,Set,nil> }, attributes_to_get: ["AttributeName"], consistent_read: false, return_consumed_capacity: "INDEXES", # accepts INDEXES, TOTAL, NONE projection_expression: "ProjectionExpression", expression_attribute_names: { "ExpressionAttributeNameVariable" => "AttributeName", }, })
@param [Hash] options ({}) @option options [required, Hash<String,Types::AttributeValue>] :key
A map of attribute names to `AttributeValue` objects, representing the primary key of the item to retrieve. For the primary key, you must provide all of the 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.
@option options [Array<String>] :attributes_to_get
This is a legacy parameter. Use `ProjectionExpression` instead. For more information, see [AttributesToGet][1] in the *Amazon DynamoDB Developer Guide*. [1]: https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/LegacyConditionalParameters.AttributesToGet.html
@option options [Boolean] :consistent_read
Determines the read consistency model: If set to `true`, then the operation uses strongly consistent reads; otherwise, the operation uses eventually consistent reads.
@option options [String] :return_consumed_capacity
Determines the level of detail about provisioned throughput consumption that is returned in the response: * `INDEXES` - The response includes the aggregate `ConsumedCapacity` for the operation, together with `ConsumedCapacity` for each table and secondary index that was accessed. Note that some operations, such as `GetItem` and `BatchGetItem`, do not access any indexes at all. In these cases, specifying `INDEXES` will only return `ConsumedCapacity` information for table(s). * `TOTAL` - The response includes only the aggregate `ConsumedCapacity` for the operation. * `NONE` - No `ConsumedCapacity` details are included in the response.
@option options [String] :projection_expression
A string that identifies 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 are returned. If any of the requested attributes are not found, they do not appear in the result. For more information, see [Specifying Item Attributes][1] in the *Amazon DynamoDB Developer Guide*. [1]: https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Expressions.AccessingItemAttributes.html
@option options [Hash<String,String>] :expression_attribute_names
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][1] 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` ^ <note markdown="1"> Tokens that begin with the **\:** character are *expression attribute values*, which are placeholders for the actual value at runtime. </note> For more information on expression attribute names, see [Specifying Item Attributes][2] in the *Amazon DynamoDB Developer Guide*. [1]: https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/ReservedWords.html [2]: https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Expressions.AccessingItemAttributes.html
@return [Types::GetItemOutput]
# File lib/aws-sdk-dynamodb/table.rb, line 813 def get_item(options = {}) options = options.merge(table_name: @name) resp = @client.get_item(options) resp.data end
The global secondary indexes, if any, on the table. Each index is scoped to a given partition key value. Each element is composed of:
-
`Backfilling` - If true, then the index is currently in the backfilling phase. Backfilling occurs only when a new global secondary index is added to the table. It is the process by which
DynamoDB
populates the new index with data from the table. (This attribute does not appear for indexes that were created during a `CreateTable` operation.)You can delete an index that is being created during the `Backfilling` phase when `IndexStatus` is set to CREATING and `Backfilling` is true. You can't delete the index that is being created when `IndexStatus` is set to CREATING and `Backfilling` is false. (This attribute does not appear for indexes that were created during a `CreateTable` operation.)
-
`IndexName` - The name of the global secondary index.
-
`IndexSizeBytes` - The total size of the global secondary index, in bytes.
DynamoDB
updates this value approximately every six hours. Recent changes might not be reflected in this value. -
`IndexStatus` - The current status of the global secondary index:
-
`CREATING` - The index is being created.
-
`UPDATING` - The index is being updated.
-
`DELETING` - The index is being deleted.
-
`ACTIVE` - The index is ready for use.
-
-
`ItemCount` - The number of items in the global secondary index.
DynamoDB
updates this value approximately every six hours. Recent changes might not be reflected in this value. -
`KeySchema` - Specifies the complete index key schema. The attribute names in the key schema must be between 1 and 255 characters (inclusive). The key schema must begin with the same partition key as the table.
-
`Projection` - Specifies attributes that are copied (projected) from the table into the index. These are in addition to the primary key attributes and index key attributes, which are automatically projected. Each attribute specification is composed of:
-
`ProjectionType` - One of the following:
-
`KEYS_ONLY` - Only the index and primary keys are projected into the index.
-
`INCLUDE` - In addition to the attributes described in `KEYS_ONLY`, the secondary index will include other non-key attributes that you specify.
-
`ALL` - All of the table attributes are projected into the index.
-
-
`NonKeyAttributes` - A list of one or more non-key attribute names that are projected into the secondary index. The total count of attributes provided in `NonKeyAttributes`, summed across all of the secondary indexes, must not exceed 20. If you project the same attribute into two different indexes, this counts as two distinct attributes when determining the total.
-
-
`ProvisionedThroughput` - The provisioned throughput settings for the global secondary index, consisting of read and write capacity units, along with data about increases and decreases.
If the table is in the `DELETING` state, no information about indexes will be returned. @return [Array<Types::GlobalSecondaryIndexDescription>]
# File lib/aws-sdk-dynamodb/table.rb, line 289 def global_secondary_indexes data[:global_secondary_indexes] end
Represents the version of [global tables] in use, if the table is replicated across AWS Regions.
[1]: docs.aws.amazon.com/amazondynamodb/latest/developerguide/GlobalTables.html @return [String]
# File lib/aws-sdk-dynamodb/table.rb, line 330 def global_table_version data[:global_table_version] end
@deprecated @api private
# File lib/aws-sdk-dynamodb/table.rb, line 2207 def identifiers { name: @name } end
The number of items in the specified table. DynamoDB
updates this value approximately every six hours. Recent changes might not be reflected in this value. @return [Integer]
# File lib/aws-sdk-dynamodb/table.rb, line 142 def item_count data[:item_count] end
The primary key structure for the table. Each `KeySchemaElement` consists of:
-
`AttributeName` - The name of the attribute.
-
`KeyType` - The role of the attribute:
-
`HASH` - partition key
-
`RANGE` - sort key
<note markdown=“1”> The partition key of an item is also known as its *hash attribute*. The term “hash attribute” derives from DynamoDB's usage of an internal hash function to evenly distribute data items across partitions, based on their partition key values.
The sort key of an item is also known as its *range attribute*. The
term “range attribute” derives from the way
DynamoDB
stores items with the same partition key physically close together, in sorted order by the sort key value.</note>
-
For more information about primary keys, see [Primary Key] in the *Amazon DynamoDB
Developer Guide*.
[1]: docs.aws.amazon.com/amazondynamodb/latest/developerguide/DataModel.html#DataModelPrimaryKey @return [Array<Types::KeySchemaElement>]
# File lib/aws-sdk-dynamodb/table.rb, line 81 def key_schema data[:key_schema] end
The Amazon Resource
Name (ARN) that uniquely identifies the latest stream for this table. @return [String]
# File lib/aws-sdk-dynamodb/table.rb, line 319 def latest_stream_arn data[:latest_stream_arn] end
A timestamp, in ISO 8601 format, for this stream.
Note that `LatestStreamLabel` is not a unique identifier for the stream, because it is possible that a stream from another table might have the same timestamp. However, the combination of the following three elements is guaranteed to be unique:
-
AWS customer ID
-
Table
name -
`StreamLabel`
@return [String]
# File lib/aws-sdk-dynamodb/table.rb, line 312 def latest_stream_label data[:latest_stream_label] end
Loads, or reloads {#data} for the current {Table}. Returns `self` making it possible to chain methods.
table.reload.data
@return [self]
# File lib/aws-sdk-dynamodb/table.rb, line 372 def load resp = @client.describe_table(table_name: @name) @data = resp.table self end
Represents one or more local secondary indexes on the table. Each index is scoped to a given partition key value. Tables with one or more local secondary indexes are subject to an item collection size limit, where the amount of data within a given item collection cannot exceed 10 GB. Each element is composed of:
-
`IndexName` - The name of the local secondary index.
-
`KeySchema` - Specifies the complete index key schema. The attribute names in the key schema must be between 1 and 255 characters (inclusive). The key schema must begin with the same partition key as the table.
-
`Projection` - Specifies attributes that are copied (projected) from the table into the index. These are in addition to the primary key attributes and index key attributes, which are automatically projected. Each attribute specification is composed of:
-
`ProjectionType` - One of the following:
-
`KEYS_ONLY` - Only the index and primary keys are projected into the index.
-
`INCLUDE` - Only the specified table attributes are projected into the index. The list of projected attributes is in `NonKeyAttributes`.
-
`ALL` - All of the table attributes are projected into the index.
-
-
`NonKeyAttributes` - A list of one or more non-key attribute names that are projected into the secondary index. The total count of attributes provided in `NonKeyAttributes`, summed across all of the secondary indexes, must not exceed 20. If you project the same attribute into two different indexes, this counts as two distinct attributes when determining the total.
-
-
`IndexSizeBytes` - Represents the total size of the index, in bytes.
DynamoDB
updates this value approximately every six hours. Recent changes might not be reflected in this value. -
`ItemCount` - Represents the number of items in the index.
DynamoDB
updates this value approximately every six hours. Recent changes might not be reflected in this value.
If the table is in the `DELETING` state, no information about indexes will be returned. @return [Array<Types::LocalSecondaryIndexDescription>]
# File lib/aws-sdk-dynamodb/table.rb, line 212 def local_secondary_indexes data[:local_secondary_indexes] end
@return [String]
# File lib/aws-sdk-dynamodb/table.rb, line 33 def name @name end
The provisioned throughput settings for the table, consisting of read and write capacity units, along with data about increases and decreases. @return [Types::ProvisionedThroughputDescription]
# File lib/aws-sdk-dynamodb/table.rb, line 126 def provisioned_throughput data[:provisioned_throughput] end
@example Request syntax with placeholder values
table.put_item({ item: { # required "AttributeName" => "value", # value <Hash,Array,String,Numeric,Boolean,IO,Set,nil> }, expected: { "AttributeName" => { value: "value", # value <Hash,Array,String,Numeric,Boolean,IO,Set,nil> exists: false, comparison_operator: "EQ", # accepts EQ, NE, IN, LE, LT, GE, GT, BETWEEN, NOT_NULL, NULL, CONTAINS, NOT_CONTAINS, BEGINS_WITH attribute_value_list: ["value"], # value <Hash,Array,String,Numeric,Boolean,IO,Set,nil> }, }, return_values: "NONE", # accepts NONE, ALL_OLD, UPDATED_OLD, ALL_NEW, UPDATED_NEW return_consumed_capacity: "INDEXES", # accepts INDEXES, TOTAL, NONE return_item_collection_metrics: "SIZE", # accepts SIZE, NONE conditional_operator: "AND", # accepts AND, OR condition_expression: "ConditionExpression", expression_attribute_names: { "ExpressionAttributeNameVariable" => "AttributeName", }, expression_attribute_values: { "ExpressionAttributeValueVariable" => "value", # value <Hash,Array,String,Numeric,Boolean,IO,Set,nil> }, })
@param [Hash] options ({}) @option options [required, Hash<String,Types::AttributeValue>] :item
A map of attribute name/value pairs, one for each attribute. Only the primary key attributes are required; you can optionally provide other attribute name-value pairs for the item. You must provide all of the attributes for the primary key. 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 both values for both the partition key and the sort key. If you specify any attributes that are part of an index key, then the data types for those attributes must match those of the schema in the table's attribute definition. Empty String and Binary attribute values are allowed. Attribute values of type String and Binary must have a length greater than zero if the attribute is used as a key attribute for a table or index. For more information about primary keys, see [Primary Key][1] in the *Amazon DynamoDB Developer Guide*. Each element in the `Item` map is an `AttributeValue` object. [1]: https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/HowItWorks.CoreComponents.html#HowItWorks.CoreComponents.PrimaryKey
@option options [Hash<String,Types::ExpectedAttributeValue>] :expected
This is a legacy parameter. Use `ConditionExpression` instead. For more information, see [Expected][1] in the *Amazon DynamoDB Developer Guide*. [1]: https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/LegacyConditionalParameters.Expected.html
@option options [String] :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. <note markdown="1"> The `ReturnValues` parameter is used by several DynamoDB operations; however, `PutItem` does not recognize any values other than `NONE` or `ALL_OLD`. </note>
@option options [String] :return_consumed_capacity
Determines the level of detail about provisioned throughput consumption that is returned in the response: * `INDEXES` - The response includes the aggregate `ConsumedCapacity` for the operation, together with `ConsumedCapacity` for each table and secondary index that was accessed. Note that some operations, such as `GetItem` and `BatchGetItem`, do not access any indexes at all. In these cases, specifying `INDEXES` will only return `ConsumedCapacity` information for table(s). * `TOTAL` - The response includes only the aggregate `ConsumedCapacity` for the operation. * `NONE` - No `ConsumedCapacity` details are included in the response.
@option options [String] :return_item_collection_metrics
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.
@option options [String] :conditional_operator
This is a legacy parameter. Use `ConditionExpression` instead. For more information, see [ConditionalOperator][1] in the *Amazon DynamoDB Developer Guide*. [1]: https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/LegacyConditionalParameters.ConditionalOperator.html
@option options [String] :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: * 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 [Condition Expressions][1] in the *Amazon DynamoDB Developer Guide*. [1]: https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Expressions.SpecifyingConditions.html
@option options [Hash<String,String>] :expression_attribute_names
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][1] 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` ^ <note markdown="1"> Tokens that begin with the **\:** character are *expression attribute values*, which are placeholders for the actual value at runtime. </note> For more information on expression attribute names, see [Specifying Item Attributes][2] in the *Amazon DynamoDB Developer Guide*. [1]: https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/ReservedWords.html [2]: https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Expressions.AccessingItemAttributes.html
@option options [Hash<String,Types::AttributeValue>] :expression_attribute_values
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][1] in the *Amazon DynamoDB Developer Guide*. [1]: https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Expressions.SpecifyingConditions.html
@return [Types::PutItemOutput]
# File lib/aws-sdk-dynamodb/table.rb, line 1023 def put_item(options = {}) options = options.merge(table_name: @name) resp = @client.put_item(options) resp.data end
@example Request syntax with placeholder values
table.query({ index_name: "IndexName", select: "ALL_ATTRIBUTES", # accepts ALL_ATTRIBUTES, ALL_PROJECTED_ATTRIBUTES, SPECIFIC_ATTRIBUTES, COUNT attributes_to_get: ["AttributeName"], limit: 1, consistent_read: false, key_conditions: { "AttributeName" => { attribute_value_list: ["value"], # value <Hash,Array,String,Numeric,Boolean,IO,Set,nil> comparison_operator: "EQ", # required, accepts EQ, NE, IN, LE, LT, GE, GT, BETWEEN, NOT_NULL, NULL, CONTAINS, NOT_CONTAINS, BEGINS_WITH }, }, query_filter: { "AttributeName" => { attribute_value_list: ["value"], # value <Hash,Array,String,Numeric,Boolean,IO,Set,nil> comparison_operator: "EQ", # required, accepts EQ, NE, IN, LE, LT, GE, GT, BETWEEN, NOT_NULL, NULL, CONTAINS, NOT_CONTAINS, BEGINS_WITH }, }, conditional_operator: "AND", # accepts AND, OR scan_index_forward: false, exclusive_start_key: { "AttributeName" => "value", # value <Hash,Array,String,Numeric,Boolean,IO,Set,nil> }, return_consumed_capacity: "INDEXES", # accepts INDEXES, TOTAL, NONE projection_expression: "ProjectionExpression", filter_expression: "ConditionExpression", key_condition_expression: "KeyExpression", expression_attribute_names: { "ExpressionAttributeNameVariable" => "AttributeName", }, expression_attribute_values: { "ExpressionAttributeValueVariable" => "value", # value <Hash,Array,String,Numeric,Boolean,IO,Set,nil> }, })
@param [Hash] options ({}) @option options [String] :index_name
The name of an index to query. This index can be any local secondary index or global secondary index on the table. Note that if you use the `IndexName` parameter, you must also provide `TableName.`
@option options [String] :select
The attributes to be returned in the result. You can retrieve all item attributes, specific item attributes, the count of matching items, or in the case of an index, some or all of the attributes projected into the index. * `ALL_ATTRIBUTES` - Returns all of the item attributes from the specified table or index. If you query a local secondary index, then for each matching item in the index, DynamoDB fetches the entire item from the parent table. If the index is configured to project all item attributes, then all of the data can be obtained from the local secondary index, and no fetching is required. * `ALL_PROJECTED_ATTRIBUTES` - Allowed only when querying an index. Retrieves all attributes that have been projected into the index. If the index is configured to project all attributes, this return value is equivalent to specifying `ALL_ATTRIBUTES`. * `COUNT` - Returns the number of matching items, rather than the matching items themselves. * `SPECIFIC_ATTRIBUTES` - Returns only the attributes listed in `AttributesToGet`. This return value is equivalent to specifying `AttributesToGet` without specifying any value for `Select`. If you query or scan a local secondary index and request only attributes that are projected into that index, the operation will read only the index and not the table. If any of the requested attributes are not projected into the local secondary index, DynamoDB fetches each of these attributes from the parent table. This extra fetching incurs additional throughput cost and latency. If you query or scan a global secondary index, you can only request attributes that are projected into the index. Global secondary index queries cannot fetch attributes from the parent table. If neither `Select` nor `AttributesToGet` are specified, DynamoDB defaults to `ALL_ATTRIBUTES` when accessing a table, and `ALL_PROJECTED_ATTRIBUTES` when accessing an index. You cannot use both `Select` and `AttributesToGet` together in a single request, unless the value for `Select` is `SPECIFIC_ATTRIBUTES`. (This usage is equivalent to specifying `AttributesToGet` without any value for `Select`.) <note markdown="1"> If you use the `ProjectionExpression` parameter, then the value for `Select` can only be `SPECIFIC_ATTRIBUTES`. Any other value for `Select` will return an error. </note>
@option options [Array<String>] :attributes_to_get
This is a legacy parameter. Use `ProjectionExpression` instead. For more information, see [AttributesToGet][1] in the *Amazon DynamoDB Developer Guide*. [1]: https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/LegacyConditionalParameters.AttributesToGet.html
@option options [Integer] :limit
The maximum number of items to evaluate (not necessarily the number of matching items). If DynamoDB processes the number of items up to the limit while processing the results, it stops the operation and returns the matching values up to that point, and a key in `LastEvaluatedKey` to apply in a subsequent operation, so that you can pick up where you left off. Also, if the processed dataset size exceeds 1 MB before DynamoDB reaches this limit, it stops the operation and returns the matching values up to the limit, and a key in `LastEvaluatedKey` to apply in a subsequent operation to continue the operation. For more information, see [Query and Scan][1] in the *Amazon DynamoDB Developer Guide*. [1]: https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/QueryAndScan.html
@option options [Boolean] :consistent_read
Determines the read consistency model: If set to `true`, then the operation uses strongly consistent reads; otherwise, the operation uses eventually consistent reads. Strongly consistent reads are not supported on global secondary indexes. If you query a global secondary index with `ConsistentRead` set to `true`, you will receive a `ValidationException`.
@option options [Hash<String,Types::Condition>] :key_conditions
This is a legacy parameter. Use `KeyConditionExpression` instead. For more information, see [KeyConditions][1] in the *Amazon DynamoDB Developer Guide*. [1]: https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/LegacyConditionalParameters.KeyConditions.html
@option options [Hash<String,Types::Condition>] :query_filter
This is a legacy parameter. Use `FilterExpression` instead. For more information, see [QueryFilter][1] in the *Amazon DynamoDB Developer Guide*. [1]: https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/LegacyConditionalParameters.QueryFilter.html
@option options [String] :conditional_operator
This is a legacy parameter. Use `FilterExpression` instead. For more information, see [ConditionalOperator][1] in the *Amazon DynamoDB Developer Guide*. [1]: https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/LegacyConditionalParameters.ConditionalOperator.html
@option options [Boolean] :scan_index_forward
Specifies the order for index traversal: If `true` (default), the traversal is performed in ascending order; if `false`, the traversal is performed in descending order. Items with the same partition key value are stored in sorted order by sort key. If the sort key data type is Number, the results are stored in numeric order. For type String, the results are stored in order of UTF-8 bytes. For type Binary, DynamoDB treats each byte of the binary data as unsigned. If `ScanIndexForward` is `true`, DynamoDB returns the results in the order in which they are stored (by sort key value). This is the default behavior. If `ScanIndexForward` is `false`, DynamoDB reads the results in reverse order by sort key value, and then returns the results to the client.
@option options [Hash<String,Types::AttributeValue>] :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.
@option options [String] :return_consumed_capacity
Determines the level of detail about provisioned throughput consumption that is returned in the response: * `INDEXES` - The response includes the aggregate `ConsumedCapacity` for the operation, together with `ConsumedCapacity` for each table and secondary index that was accessed. Note that some operations, such as `GetItem` and `BatchGetItem`, do not access any indexes at all. In these cases, specifying `INDEXES` will only return `ConsumedCapacity` information for table(s). * `TOTAL` - The response includes only the aggregate `ConsumedCapacity` for the operation. * `NONE` - No `ConsumedCapacity` details are included in the response.
@option options [String] :projection_expression
A string that identifies 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. For more information, see [Accessing Item Attributes][1] in the *Amazon DynamoDB Developer Guide*. [1]: https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Expressions.AccessingItemAttributes.html
@option options [String] :filter_expression
A string that contains conditions that DynamoDB applies after the `Query` operation, but before the data is returned to you. Items that do not satisfy the `FilterExpression` criteria are not returned. A `FilterExpression` does not allow key attributes. You cannot define a filter expression based on a partition key or a sort key. <note markdown="1"> A `FilterExpression` is applied after the items have already been read; the process of filtering does not consume any additional read capacity units. </note> For more information, see [Filter Expressions][1] in the *Amazon DynamoDB Developer Guide*. [1]: https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/QueryAndScan.html#FilteringResults
@option options [String] :key_condition_expression
The condition that specifies the key values for items to be retrieved by the `Query` action. The condition must perform an equality test on a single partition key value. The condition can optionally perform one of several comparison tests on a single sort key value. This allows `Query` to retrieve one item with a given partition key value and sort key value, or several items that have the same partition key value but different sort key values. The partition key equality test is required, and must be specified in the following format: `partitionKeyName` *=* `:partitionkeyval` If you also want to provide a condition for the sort key, it must be combined using `AND` with the condition for the sort key. Following is an example, using the **=** comparison operator for the sort key: `partitionKeyName` `=` `:partitionkeyval` `AND` `sortKeyName` `=` `:sortkeyval` Valid comparisons for the sort key condition are as follows: * `sortKeyName` `=` `:sortkeyval` - true if the sort key value is equal to `:sortkeyval`. * `sortKeyName` `<` `:sortkeyval` - true if the sort key value is less than `:sortkeyval`. * `sortKeyName` `<=` `:sortkeyval` - true if the sort key value is less than or equal to `:sortkeyval`. * `sortKeyName` `>` `:sortkeyval` - true if the sort key value is greater than `:sortkeyval`. * `sortKeyName` `>= ` `:sortkeyval` - true if the sort key value is greater than or equal to `:sortkeyval`. * `sortKeyName` `BETWEEN` `:sortkeyval1` `AND` `:sortkeyval2` - true if the sort key value is greater than or equal to `:sortkeyval1`, and less than or equal to `:sortkeyval2`. * `begins_with (` `sortKeyName`, `:sortkeyval` `)` - true if the sort key value begins with a particular operand. (You cannot use this function with a sort key that is of type Number.) Note that the function name `begins_with` is case-sensitive. Use the `ExpressionAttributeValues` parameter to replace tokens such as `:partitionval` and `:sortval` with actual values at runtime. You can optionally use the `ExpressionAttributeNames` parameter to replace the names of the partition key and sort key with placeholder tokens. This option might be necessary if an attribute name conflicts with a DynamoDB reserved word. For example, the following `KeyConditionExpression` parameter causes an error because *Size* is a reserved word: * `Size = :myval` ^ To work around this, define a placeholder (such a `#S`) to represent the attribute name *Size*. `KeyConditionExpression` then is as follows: * `#S = :myval` ^ For a list of reserved words, see [Reserved Words][1] in the *Amazon DynamoDB Developer Guide*. For more information on `ExpressionAttributeNames` and `ExpressionAttributeValues`, see [Using Placeholders for Attribute Names and Values][2] in the *Amazon DynamoDB Developer Guide*. [1]: https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/ReservedWords.html [2]: https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/ExpressionPlaceholders.html
@option options [Hash<String,String>] :expression_attribute_names
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][1] 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` ^ <note markdown="1"> Tokens that begin with the **\:** character are *expression attribute values*, which are placeholders for the actual value at runtime. </note> For more information on expression attribute names, see [Specifying Item Attributes][2] in the *Amazon DynamoDB Developer Guide*. [1]: https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/ReservedWords.html [2]: https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Expressions.AccessingItemAttributes.html
@option options [Hash<String,Types::AttributeValue>] :expression_attribute_values
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 [Specifying Conditions][1] in the *Amazon DynamoDB Developer Guide*. [1]: https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Expressions.SpecifyingConditions.html
@return [Types::QueryOutput]
# File lib/aws-sdk-dynamodb/table.rb, line 1409 def query(options = {}) options = options.merge(table_name: @name) resp = @client.query(options) resp.data end
Represents replicas of the table. @return [Array<Types::ReplicaDescription>]
# File lib/aws-sdk-dynamodb/table.rb, line 336 def replicas data[:replicas] end
Contains details for the restore. @return [Types::RestoreSummary]
# File lib/aws-sdk-dynamodb/table.rb, line 342 def restore_summary data[:restore_summary] end
@example Request syntax with placeholder values
table.scan({ index_name: "IndexName", attributes_to_get: ["AttributeName"], limit: 1, select: "ALL_ATTRIBUTES", # accepts ALL_ATTRIBUTES, ALL_PROJECTED_ATTRIBUTES, SPECIFIC_ATTRIBUTES, COUNT scan_filter: { "AttributeName" => { attribute_value_list: ["value"], # value <Hash,Array,String,Numeric,Boolean,IO,Set,nil> comparison_operator: "EQ", # required, accepts EQ, NE, IN, LE, LT, GE, GT, BETWEEN, NOT_NULL, NULL, CONTAINS, NOT_CONTAINS, BEGINS_WITH }, }, conditional_operator: "AND", # accepts AND, OR exclusive_start_key: { "AttributeName" => "value", # value <Hash,Array,String,Numeric,Boolean,IO,Set,nil> }, return_consumed_capacity: "INDEXES", # accepts INDEXES, TOTAL, NONE total_segments: 1, segment: 1, projection_expression: "ProjectionExpression", filter_expression: "ConditionExpression", expression_attribute_names: { "ExpressionAttributeNameVariable" => "AttributeName", }, expression_attribute_values: { "ExpressionAttributeValueVariable" => "value", # value <Hash,Array,String,Numeric,Boolean,IO,Set,nil> }, consistent_read: false, })
@param [Hash] options ({}) @option options [String] :index_name
The name of a secondary index to scan. This index can be any local secondary index or global secondary index. Note that if you use the `IndexName` parameter, you must also provide `TableName`.
@option options [Array<String>] :attributes_to_get
This is a legacy parameter. Use `ProjectionExpression` instead. For more information, see [AttributesToGet][1] in the *Amazon DynamoDB Developer Guide*. [1]: https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/LegacyConditionalParameters.AttributesToGet.html
@option options [Integer] :limit
The maximum number of items to evaluate (not necessarily the number of matching items). If DynamoDB processes the number of items up to the limit while processing the results, it stops the operation and returns the matching values up to that point, and a key in `LastEvaluatedKey` to apply in a subsequent operation, so that you can pick up where you left off. Also, if the processed dataset size exceeds 1 MB before DynamoDB reaches this limit, it stops the operation and returns the matching values up to the limit, and a key in `LastEvaluatedKey` to apply in a subsequent operation to continue the operation. For more information, see [Working with Queries][1] in the *Amazon DynamoDB Developer Guide*. [1]: https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/QueryAndScan.html
@option options [String] :select
The attributes to be returned in the result. You can retrieve all item attributes, specific item attributes, the count of matching items, or in the case of an index, some or all of the attributes projected into the index. * `ALL_ATTRIBUTES` - Returns all of the item attributes from the specified table or index. If you query a local secondary index, then for each matching item in the index, DynamoDB fetches the entire item from the parent table. If the index is configured to project all item attributes, then all of the data can be obtained from the local secondary index, and no fetching is required. * `ALL_PROJECTED_ATTRIBUTES` - Allowed only when querying an index. Retrieves all attributes that have been projected into the index. If the index is configured to project all attributes, this return value is equivalent to specifying `ALL_ATTRIBUTES`. * `COUNT` - Returns the number of matching items, rather than the matching items themselves. * `SPECIFIC_ATTRIBUTES` - Returns only the attributes listed in `AttributesToGet`. This return value is equivalent to specifying `AttributesToGet` without specifying any value for `Select`. If you query or scan a local secondary index and request only attributes that are projected into that index, the operation reads only the index and not the table. If any of the requested attributes are not projected into the local secondary index, DynamoDB fetches each of these attributes from the parent table. This extra fetching incurs additional throughput cost and latency. If you query or scan a global secondary index, you can only request attributes that are projected into the index. Global secondary index queries cannot fetch attributes from the parent table. If neither `Select` nor `AttributesToGet` are specified, DynamoDB defaults to `ALL_ATTRIBUTES` when accessing a table, and `ALL_PROJECTED_ATTRIBUTES` when accessing an index. You cannot use both `Select` and `AttributesToGet` together in a single request, unless the value for `Select` is `SPECIFIC_ATTRIBUTES`. (This usage is equivalent to specifying `AttributesToGet` without any value for `Select`.) <note markdown="1"> If you use the `ProjectionExpression` parameter, then the value for `Select` can only be `SPECIFIC_ATTRIBUTES`. Any other value for `Select` will return an error. </note>
@option options [Hash<String,Types::Condition>] :scan_filter
This is a legacy parameter. Use `FilterExpression` instead. For more information, see [ScanFilter][1] in the *Amazon DynamoDB Developer Guide*. [1]: https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/LegacyConditionalParameters.ScanFilter.html
@option options [String] :conditional_operator
This is a legacy parameter. Use `FilterExpression` instead. For more information, see [ConditionalOperator][1] in the *Amazon DynamoDB Developer Guide*. [1]: https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/LegacyConditionalParameters.ConditionalOperator.html
@option options [Hash<String,Types::AttributeValue>] :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. In a parallel scan, a `Scan` request that includes `ExclusiveStartKey` must specify the same segment whose previous `Scan` returned the corresponding value of `LastEvaluatedKey`.
@option options [String] :return_consumed_capacity
Determines the level of detail about provisioned throughput consumption that is returned in the response: * `INDEXES` - The response includes the aggregate `ConsumedCapacity` for the operation, together with `ConsumedCapacity` for each table and secondary index that was accessed. Note that some operations, such as `GetItem` and `BatchGetItem`, do not access any indexes at all. In these cases, specifying `INDEXES` will only return `ConsumedCapacity` information for table(s). * `TOTAL` - The response includes only the aggregate `ConsumedCapacity` for the operation. * `NONE` - No `ConsumedCapacity` details are included in the response.
@option options [Integer] :total_segments
For a parallel `Scan` request, `TotalSegments` represents the total number of segments into which the `Scan` operation will be divided. The value of `TotalSegments` corresponds to the number of application workers that will perform the parallel scan. For example, if you want to use four application threads to scan a table or an index, specify a `TotalSegments` value of 4. The value for `TotalSegments` must be greater than or equal to 1, and less than or equal to 1000000. If you specify a `TotalSegments` value of 1, the `Scan` operation will be sequential rather than parallel. If you specify `TotalSegments`, you must also specify `Segment`.
@option options [Integer] :segment
For a parallel `Scan` request, `Segment` identifies an individual segment to be scanned by an application worker. Segment IDs are zero-based, so the first segment is always 0. For example, if you want to use four application threads to scan a table or an index, then the first thread specifies a `Segment` value of 0, the second thread specifies 1, and so on. The value of `LastEvaluatedKey` returned from a parallel `Scan` request must be used as `ExclusiveStartKey` with the same segment ID in a subsequent `Scan` operation. The value for `Segment` must be greater than or equal to 0, and less than the value provided for `TotalSegments`. If you provide `Segment`, you must also provide `TotalSegments`.
@option options [String] :projection_expression
A string that identifies one or more attributes to retrieve from the specified table or index. 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. For more information, see [Specifying Item Attributes][1] in the *Amazon DynamoDB Developer Guide*. [1]: https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Expressions.AccessingItemAttributes.html
@option options [String] :filter_expression
A string that contains conditions that DynamoDB applies after the `Scan` operation, but before the data is returned to you. Items that do not satisfy the `FilterExpression` criteria are not returned. <note markdown="1"> A `FilterExpression` is applied after the items have already been read; the process of filtering does not consume any additional read capacity units. </note> For more information, see [Filter Expressions][1] in the *Amazon DynamoDB Developer Guide*. [1]: https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/QueryAndScan.html#FilteringResults
@option options [Hash<String,String>] :expression_attribute_names
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][1] 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` ^ <note markdown="1"> Tokens that begin with the **\:** character are *expression attribute values*, which are placeholders for the actual value at runtime. </note> For more information on expression attribute names, see [Specifying Item Attributes][2] in the *Amazon DynamoDB Developer Guide*. [1]: https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/ReservedWords.html [2]: https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Expressions.AccessingItemAttributes.html
@option options [Hash<String,Types::AttributeValue>] :expression_attribute_values
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][1] in the *Amazon DynamoDB Developer Guide*. [1]: https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Expressions.SpecifyingConditions.html
@option options [Boolean] :consistent_read
A Boolean value that determines the read consistency model during the scan: * If `ConsistentRead` is `false`, then the data returned from `Scan` might not contain the results from other recently completed write operations (`PutItem`, `UpdateItem`, or `DeleteItem`). * If `ConsistentRead` is `true`, then all of the write operations that completed before the `Scan` began are guaranteed to be contained in the `Scan` response. The default setting for `ConsistentRead` is `false`. The `ConsistentRead` parameter is not supported on global secondary indexes. If you scan a global secondary index with `ConsistentRead` set to true, you will receive a `ValidationException`.
@return [Types::ScanOutput]
# File lib/aws-sdk-dynamodb/table.rb, line 1722 def scan(options = {}) options = options.merge(table_name: @name) resp = @client.scan(options) resp.data end
The description of the server-side encryption status on the specified table. @return [Types::SSEDescription]
# File lib/aws-sdk-dynamodb/table.rb, line 349 def sse_description data[:sse_description] end
The current DynamoDB
Streams configuration for the table. @return [Types::StreamSpecification]
# File lib/aws-sdk-dynamodb/table.rb, line 295 def stream_specification data[:stream_specification] end
The Amazon Resource
Name (ARN) that uniquely identifies the table. @return [String]
# File lib/aws-sdk-dynamodb/table.rb, line 148 def table_arn data[:table_arn] end
Unique identifier for the table for which the backup was created. @return [String]
# File lib/aws-sdk-dynamodb/table.rb, line 154 def table_id data[:table_id] end
The total size of the specified table, in bytes. DynamoDB
updates this value approximately every six hours. Recent changes might not be reflected in this value. @return [Integer]
# File lib/aws-sdk-dynamodb/table.rb, line 134 def table_size_bytes data[:table_size_bytes] end
The current state of the table:
-
`CREATING` - The table is being created.
-
`UPDATING` - The table is being updated.
-
`DELETING` - The table is being deleted.
-
`ACTIVE` - The table is ready for use.
-
`INACCESSIBLE_ENCRYPTION_CREDENTIALS` - The AWS KMS key used to encrypt the table in inaccessible.
Table
operations may fail due to failure to use the AWS KMS key.DynamoDB
will initiate the table archival process when a table's AWS KMS key remains inaccessible for more than seven days. -
`ARCHIVING` - The table is being archived. Operations are not allowed until archival is complete.
-
`ARCHIVED` - The table has been archived. See the ArchivalReason for more information.
@return [String]
# File lib/aws-sdk-dynamodb/table.rb, line 107 def table_status data[:table_status] end
@example Request syntax with placeholder values
table = table.update({ attribute_definitions: [ { attribute_name: "KeySchemaAttributeName", # required attribute_type: "S", # required, accepts S, N, B }, ], billing_mode: "PROVISIONED", # accepts PROVISIONED, PAY_PER_REQUEST provisioned_throughput: { read_capacity_units: 1, # required write_capacity_units: 1, # required }, global_secondary_index_updates: [ { update: { index_name: "IndexName", # required provisioned_throughput: { # required read_capacity_units: 1, # required write_capacity_units: 1, # required }, }, create: { index_name: "IndexName", # required key_schema: [ # required { attribute_name: "KeySchemaAttributeName", # required key_type: "HASH", # required, accepts HASH, RANGE }, ], projection: { # required projection_type: "ALL", # accepts ALL, KEYS_ONLY, INCLUDE non_key_attributes: ["NonKeyAttributeName"], }, provisioned_throughput: { read_capacity_units: 1, # required write_capacity_units: 1, # required }, }, delete: { index_name: "IndexName", # required }, }, ], stream_specification: { stream_enabled: false, # required stream_view_type: "NEW_IMAGE", # accepts NEW_IMAGE, OLD_IMAGE, NEW_AND_OLD_IMAGES, KEYS_ONLY }, sse_specification: { enabled: false, sse_type: "AES256", # accepts AES256, KMS kms_master_key_id: "KMSMasterKeyId", }, replica_updates: [ { create: { region_name: "RegionName", # required kms_master_key_id: "KMSMasterKeyId", provisioned_throughput_override: { read_capacity_units: 1, }, global_secondary_indexes: [ { index_name: "IndexName", # required provisioned_throughput_override: { read_capacity_units: 1, }, }, ], }, update: { region_name: "RegionName", # required kms_master_key_id: "KMSMasterKeyId", provisioned_throughput_override: { read_capacity_units: 1, }, global_secondary_indexes: [ { index_name: "IndexName", # required provisioned_throughput_override: { read_capacity_units: 1, }, }, ], }, delete: { region_name: "RegionName", # required }, }, ], })
@param [Hash] options ({}) @option options [Array<Types::AttributeDefinition>] :attribute_definitions
An array of attributes that describe the key schema for the table and indexes. If you are adding a new global secondary index to the table, `AttributeDefinitions` must include the key element(s) of the new index.
@option options [String] :billing_mode
Controls how you are charged for read and write throughput and how you manage capacity. When switching from pay-per-request to provisioned capacity, initial provisioned capacity values must be set. The initial provisioned capacity values are estimated based on the consumed read and write capacity of your table and global secondary indexes over the past 30 minutes. * `PROVISIONED` - We recommend using `PROVISIONED` for predictable workloads. `PROVISIONED` sets the billing mode to [Provisioned Mode][1]. * `PAY_PER_REQUEST` - We recommend using `PAY_PER_REQUEST` for unpredictable workloads. `PAY_PER_REQUEST` sets the billing mode to [On-Demand Mode][2]. [1]: https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/HowItWorks.ReadWriteCapacityMode.html#HowItWorks.ProvisionedThroughput.Manual [2]: https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/HowItWorks.ReadWriteCapacityMode.html#HowItWorks.OnDemand
@option options [Types::ProvisionedThroughput] :provisioned_throughput
The new provisioned throughput settings for the specified table or index.
@option options [Array<Types::GlobalSecondaryIndexUpdate>] :global_secondary_index_updates
An array of one or more global secondary indexes for the table. For each index in the array, you can request one action: * `Create` - add a new global secondary index to the table. * `Update` - modify the provisioned throughput settings of an existing global secondary index. * `Delete` - remove a global secondary index from the table. You can create or delete only one global secondary index per `UpdateTable` operation. For more information, see [Managing Global Secondary Indexes][1] in the *Amazon DynamoDB Developer Guide*. [1]: https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/GSI.OnlineOps.html
@option options [Types::StreamSpecification] :stream_specification
Represents the DynamoDB Streams configuration for the table. <note markdown="1"> You receive a `ResourceInUseException` if you try to enable a stream on a table that already has a stream, or if you try to disable a stream on a table that doesn't have a stream. </note>
@option options [Types::SSESpecification] :sse_specification
The new server-side encryption settings for the specified table.
@option options [Array<Types::ReplicationGroupUpdate>] :replica_updates
A list of replica update actions (create, delete, or update) for the table. <note markdown="1"> This property only applies to [Version 2019.11.21][1] of global tables. </note> [1]: https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/globaltables.V2.html
@return [Table]
# File lib/aws-sdk-dynamodb/table.rb, line 1892 def update(options = {}) options = options.merge(table_name: @name) resp = @client.update_table(options) Table.new( name: @name, data: resp.data.table_description, client: @client ) end
@example Request syntax with placeholder values
table.update_item({ key: { # required "AttributeName" => "value", # value <Hash,Array,String,Numeric,Boolean,IO,Set,nil> }, attribute_updates: { "AttributeName" => { value: "value", # value <Hash,Array,String,Numeric,Boolean,IO,Set,nil> action: "ADD", # accepts ADD, PUT, DELETE }, }, expected: { "AttributeName" => { value: "value", # value <Hash,Array,String,Numeric,Boolean,IO,Set,nil> exists: false, comparison_operator: "EQ", # accepts EQ, NE, IN, LE, LT, GE, GT, BETWEEN, NOT_NULL, NULL, CONTAINS, NOT_CONTAINS, BEGINS_WITH attribute_value_list: ["value"], # value <Hash,Array,String,Numeric,Boolean,IO,Set,nil> }, }, conditional_operator: "AND", # accepts AND, OR return_values: "NONE", # accepts NONE, ALL_OLD, UPDATED_OLD, ALL_NEW, UPDATED_NEW return_consumed_capacity: "INDEXES", # accepts INDEXES, TOTAL, NONE return_item_collection_metrics: "SIZE", # accepts SIZE, NONE update_expression: "UpdateExpression", condition_expression: "ConditionExpression", expression_attribute_names: { "ExpressionAttributeNameVariable" => "AttributeName", }, expression_attribute_values: { "ExpressionAttributeValueVariable" => "value", # value <Hash,Array,String,Numeric,Boolean,IO,Set,nil> }, })
@param [Hash] options ({}) @option options [required, Hash<String,Types::AttributeValue>] :key
The primary key of the item to be updated. Each element consists of an attribute name and a value for that attribute. For the primary key, you must provide all of the 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.
@option options [Hash<String,Types::AttributeValueUpdate>] :attribute_updates
This is a legacy parameter. Use `UpdateExpression` instead. For more information, see [AttributeUpdates][1] in the *Amazon DynamoDB Developer Guide*. [1]: https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/LegacyConditionalParameters.AttributeUpdates.html
@option options [Hash<String,Types::ExpectedAttributeValue>] :expected
This is a legacy parameter. Use `ConditionExpression` instead. For more information, see [Expected][1] in the *Amazon DynamoDB Developer Guide*. [1]: https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/LegacyConditionalParameters.Expected.html
@option options [String] :conditional_operator
This is a legacy parameter. Use `ConditionExpression` instead. For more information, see [ConditionalOperator][1] in the *Amazon DynamoDB Developer Guide*. [1]: https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/LegacyConditionalParameters.ConditionalOperator.html
@option options [String] :return_values
Use `ReturnValues` if you want to get the item attributes as they appear before or after they are 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` - Returns all of the attributes of the item, as they appeared before the UpdateItem operation. * `UPDATED_OLD` - Returns only the updated attributes, as they appeared before the UpdateItem operation. * `ALL_NEW` - Returns all of the attributes of the item, as they appear after the UpdateItem operation. * `UPDATED_NEW` - Returns only the updated attributes, as they appear after the UpdateItem operation. 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 values returned are strongly consistent.
@option options [String] :return_consumed_capacity
Determines the level of detail about provisioned throughput consumption that is returned in the response: * `INDEXES` - The response includes the aggregate `ConsumedCapacity` for the operation, together with `ConsumedCapacity` for each table and secondary index that was accessed. Note that some operations, such as `GetItem` and `BatchGetItem`, do not access any indexes at all. In these cases, specifying `INDEXES` will only return `ConsumedCapacity` information for table(s). * `TOTAL` - The response includes only the aggregate `ConsumedCapacity` for the operation. * `NONE` - No `ConsumedCapacity` details are included in the response.
@option options [String] :return_item_collection_metrics
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.
@option options [String] :update_expression
An expression that defines one or more attributes to be updated, the action to be performed on them, and new values 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 attributes 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. For example: `SET myNum = myNum + :val` `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. <note markdown="1"> If you use `ADD` to increment or decrement a number value for an item that doesn't exist before the update, DynamoDB uses `0` as the initial value. Similarly, if you use `ADD` for an existing item to increment or decrement an attribute value that doesn't exist before the update, DynamoDB uses `0` as the initial value. For example, suppose that the item you want to update doesn't have an attribute named `itemcount`, but you decide to `ADD` the number `3` to this attribute anyway. DynamoDB will create the `itemcount` attribute, set its initial value to `0`, and finally add `3` to it. The result will be a new `itemcount` attribute in the item, with a value of `3`. </note> * 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 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` For more information on update expressions, see [Modifying Items and Attributes][1] in the *Amazon DynamoDB Developer Guide*. [1]: https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Expressions.Modifying.html
@option options [String] :condition_expression
A condition that must be satisfied in order for a conditional update 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 [Specifying Conditions][1] in the *Amazon DynamoDB Developer Guide*. [1]: https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Expressions.SpecifyingConditions.html
@option options [Hash<String,String>] :expression_attribute_names
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][1] 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` ^ <note markdown="1"> Tokens that begin with the **\:** character are *expression attribute values*, which are placeholders for the actual value at runtime. </note> For more information about expression attribute names, see [Specifying Item Attributes][2] in the *Amazon DynamoDB Developer Guide*. [1]: https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/ReservedWords.html [2]: https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Expressions.AccessingItemAttributes.html
@option options [Hash<String,Types::AttributeValue>] :expression_attribute_values
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][1] in the *Amazon DynamoDB Developer Guide*. [1]: https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Expressions.SpecifyingConditions.html
@return [Types::UpdateItemOutput]
# File lib/aws-sdk-dynamodb/table.rb, line 2199 def update_item(options = {}) options = options.merge(table_name: @name) resp = @client.update_item(options) resp.data end
@deprecated Use [Aws::DynamoDB::Client] wait_until
instead
Waiter polls an API operation until a resource enters a desired state.
@note The waiting operation is performed on a copy. The original resource
remains unchanged.
## Basic Usage
Waiter will polls until it is successful, it fails by entering a terminal state, or until a maximum number of attempts are made.
# polls in a loop until condition is true resource.wait_until(options) {|resource| condition}
## Example
instance.wait_until(max_attempts:10, delay:5) do |instance| instance.state.name == 'running' end
## Configuration
You can configure the maximum number of polling attempts, and the delay (in seconds) between each polling attempt. The waiting condition is set by passing a block to {#wait_until}:
# poll for ~25 seconds resource.wait_until(max_attempts:5,delay:5) {|resource|...}
## Callbacks
You can be notified before each polling attempt and before each delay. If you throw `:success` or `:failure` from these callbacks, it will terminate the waiter.
started_at = Time.now # poll for 1 hour, instead of a number of attempts proc = Proc.new do |attempts, response| throw :failure if Time.now - started_at > 3600 end # disable max attempts instance.wait_until(before_wait:proc, max_attempts:nil) {...}
## Handling Errors
When a waiter is successful, it returns the Resource
. When a waiter fails, it raises an error.
begin resource.wait_until(...) rescue Aws::Waiters::Errors::WaiterFailed # resource did not enter the desired state in time end
@yieldparam [Resource] resource to be used in the waiting condition.
@raise [Aws::Waiters::Errors::FailureStateError] Raised when the waiter
terminates because the waiter has entered a state that it will not transition out of, preventing success. yet successful.
@raise [Aws::Waiters::Errors::UnexpectedError] Raised when an error is
encountered while polling for a resource that is not expected.
@raise [NotImplementedError] Raised when the resource does not
@option options [Integer] :max_attempts (10) Maximum number of attempts @option options [Integer] :delay (10) Delay between each attempt in seconds @option options [Proc] :before_attempt (nil) Callback invoked before each attempt @option options [Proc] :before_wait (nil) Callback invoked before each wait @return [Resource] if the waiter was successful
# File lib/aws-sdk-dynamodb/table.rb, line 474 def wait_until(options = {}, &block) self_copy = self.dup attempts = 0 options[:max_attempts] = 10 unless options.key?(:max_attempts) options[:delay] ||= 10 options[:poller] = Proc.new do attempts += 1 if block.call(self_copy) [:success, self_copy] else self_copy.reload unless attempts == options[:max_attempts] :retry end end Aws::Waiters::Waiter.new(options).wait({}) end
Private Instance Methods
# File lib/aws-sdk-dynamodb/table.rb, line 2214 def extract_name(args, options) value = args[0] || options.delete(:name) case value when String then value when nil then raise ArgumentError, "missing required option :name" else msg = "expected :name to be a String, got #{value.class}" raise ArgumentError, msg end end