Execute Statement

dynamodb_execute_statement

R Documentation

This operation allows you to perform reads and singleton writes on data stored in DynamoDB, using PartiQL

Description

This operation allows you to perform reads and singleton writes on data stored in DynamoDB, using PartiQL.

For PartiQL reads (SELECT statement), if the total number of processed items exceeds the maximum dataset size limit of 1 MB, the read stops and results are returned to the user as a LastEvaluatedKey value to continue the read in a subsequent operation. If the filter criteria in WHERE clause does not match any data, the read will return an empty result set.

A single SELECT statement response can return up to the maximum number of items (if using the Limit parameter) or a maximum of 1 MB of data (and then apply any filtering to the results using WHERE clause). If LastEvaluatedKey is present in the response, you need to paginate the result set. If NextToken is present, you need to paginate the result set and include NextToken.

Usage

dynamodb_execute_statement(Statement, Parameters, ConsistentRead,
  NextToken, ReturnConsumedCapacity, Limit,
  ReturnValuesOnConditionCheckFailure)

Arguments

Statement

[required] The PartiQL statement representing the operation to run.

Parameters

The parameters for the PartiQL statement, if any.

ConsistentRead

The consistency of a read operation. If set to true, then a strongly consistent read is used; otherwise, an eventually consistent read is used.

NextToken

Set this value to get remaining results, if NextToken was returned in the statement response.

ReturnConsumedCapacity

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, along with a key in LastEvaluatedKey to apply in a subsequent operation so 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.

ReturnValuesOnConditionCheckFailure

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

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

Value

A list with the following syntax:

list(
  Items = list(
    list(
      list(
        S = "string",
        N = "string",
        B = raw,
        SS = list(
          "string"
        ),
        NS = list(
          "string"
        ),
        BS = list(
          raw
        ),
        M = list(
          list()
        ),
        L = list(
          list()
        ),
        NULL = TRUE|FALSE,
        BOOL = TRUE|FALSE
      )
    )
  ),
  NextToken = "string",
  ConsumedCapacity = list(
    TableName = "string",
    CapacityUnits = 123.0,
    ReadCapacityUnits = 123.0,
    WriteCapacityUnits = 123.0,
    Table = list(
      ReadCapacityUnits = 123.0,
      WriteCapacityUnits = 123.0,
      CapacityUnits = 123.0
    ),
    LocalSecondaryIndexes = list(
      list(
        ReadCapacityUnits = 123.0,
        WriteCapacityUnits = 123.0,
        CapacityUnits = 123.0
      )
    ),
    GlobalSecondaryIndexes = list(
      list(
        ReadCapacityUnits = 123.0,
        WriteCapacityUnits = 123.0,
        CapacityUnits = 123.0
      )
    )
  ),
  LastEvaluatedKey = list(
    list(
      S = "string",
      N = "string",
      B = raw,
      SS = list(
        "string"
      ),
      NS = list(
        "string"
      ),
      BS = list(
        raw
      ),
      M = list(
        list()
      ),
      L = list(
        list()
      ),
      NULL = TRUE|FALSE,
      BOOL = TRUE|FALSE
    )
  )
)

Request syntax

svc$execute_statement(
  Statement = "string",
  Parameters = list(
    list(
      S = "string",
      N = "string",
      B = raw,
      SS = list(
        "string"
      ),
      NS = list(
        "string"
      ),
      BS = list(
        raw
      ),
      M = list(
        list()
      ),
      L = list(
        list()
      ),
      NULL = TRUE|FALSE,
      BOOL = TRUE|FALSE
    )
  ),
  ConsistentRead = TRUE|FALSE,
  NextToken = "string",
  ReturnConsumedCapacity = "INDEXES"|"TOTAL"|"NONE",
  Limit = 123,
  ReturnValuesOnConditionCheckFailure = "ALL_OLD"|"NONE"
)