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Creates a set of partition tokens that can be used to execute a query operation in parallel. Each of the returned partition tokens can be used by ExecuteStreamingSql to specify a subset of the query result to read. The same session and read-only transaction must be used by the PartitionQueryRequest used to create the partition tokens and the ExecuteSqlRequests that use the partition tokens. Partition tokens become invalid when the session used to create them is deleted, is idle for too long, begins a new transaction, or becomes too old. When any of these happen, it isn't possible to resume the query, and the whole operation must be restarted from the beginning.

post/v1/{+session}:partitionQuery

Request

  • Base URL: https://spanner.googleapis.com
  • URL: https://spanner.googleapis.com/v1/{+session}:partitionQuery
  • Auth: one of:
    • OAuth 2 (implicit, authorization URL https://accounts.google.com/o/oauth2/auth, scopes: https://www.googleapis.com/auth/cloud-platform) and OAuth 2 (authorization code, authorization URL https://accounts.google.com/o/oauth2/auth, token URL https://accounts.google.com/o/oauth2/token, scopes: https://www.googleapis.com/auth/cloud-platform)
    • OAuth 2 (implicit, authorization URL https://accounts.google.com/o/oauth2/auth, scopes: https://www.googleapis.com/auth/spanner.data) and OAuth 2 (authorization code, authorization URL https://accounts.google.com/o/oauth2/auth, token URL https://accounts.google.com/o/oauth2/token, scopes: https://www.googleapis.com/auth/spanner.data)

Path parameters

sessionstring required

Required. The session used to create the partitions.

Request body

paramTypesobject

Optional. It isn't always possible for Cloud Spanner to infer the right SQL type from a JSON value. For example, values of type BYTES and values of type STRING both appear in params as JSON strings. In these cases, param_types can be used to specify the exact SQL type for some or all of the SQL query parameters. See the definition of Type for more information about SQL types.

paramsobject

Optional. Parameter names and values that bind to placeholders in the SQL string. A parameter placeholder consists of the @ character followed by the parameter name (for example, @firstName). Parameter names can contain letters, numbers, and underscores. Parameters can appear anywhere that a literal value is expected. The same parameter name can be used more than once, for example: "WHERE id > @msg_id AND id < @msg_id + 100" It's an error to execute a SQL statement with unbound parameters.

sqlstring

Required. The query request to generate partitions for. The request fails if the query isn't root partitionable. For a query to be root partitionable, it needs to satisfy a few conditions. For example, if the query execution plan contains a distributed union operator, then it must be the first operator in the plan. For more information about other conditions, see Read data in parallel. The query request must not contain DML commands, such as INSERT, UPDATE, or DELETE. Use ExecuteStreamingSql with a PartitionedDml transaction for large, partition-friendly DML operations.

Response

Successful response

Changes

  • acbc6ffd2502Revision changes
    • info

      the security scope https://www.googleapis.com/auth/cloud-platform was added to the endpoint's security scheme Oauth2

    • info

      the security scope https://www.googleapis.com/auth/cloud-platform was added to the endpoint's security scheme Oauth2c

    • info

      the security scope https://www.googleapis.com/auth/spanner.data was removed from the endpoint's security scheme Oauth2

    • info

      the security scope https://www.googleapis.com/auth/spanner.data was removed from the endpoint's security scheme Oauth2c

  • 0665b07c9b64Revision changes
    • breaking

      removed the request body

    • breaking

      removed the media type */* for the response with the status

    • info

      the security scope https://www.googleapis.com/auth/cloud-platform was added to the endpoint's security scheme Oauth2

    • info

      the security scope https://www.googleapis.com/auth/cloud-platform was added to the endpoint's security scheme Oauth2c

    • info

      the security scope https://www.googleapis.com/auth/spanner.data was removed from the endpoint's security scheme Oauth2

    • info

      the security scope https://www.googleapis.com/auth/spanner.data was removed from the endpoint's security scheme Oauth2c