public final class Options implements Serializable
Specifies options for various spanner operations
Static Methods
bufferRows(int bufferRows)
public static Options.ReadAndQueryOption bufferRows(int bufferRows)
| Parameter |
|---|
| Name | Description |
bufferRows | int
|
commitStats()
public static Options.TransactionOption commitStats()
Specifying this instructs the transaction to request CommitStats from the backend.
dataBoostEnabled(Boolean dataBoostEnabled)
public static Options.DataBoostQueryOption dataBoostEnabled(Boolean dataBoostEnabled)
If this is for PartitionedRead or PartitionedQuery and this field is set to true, the request
will be executed via Spanner independent compute resources.
| Parameter |
|---|
| Name | Description |
dataBoostEnabled | Boolean
|
| Returns |
|---|
| Type | Description |
com.google.cloud.spanner.Options.DataBoostQueryOption | |
directedRead(DirectedReadOptions directedReadOptions)
public static Options.ReadAndQueryOption directedRead(DirectedReadOptions directedReadOptions)
Option to request DirectedRead for ReadOnlyTransaction and SingleUseTransaction.
The DirectedReadOptions can be used to indicate which replicas or regions should be used for
non-transactional reads or queries. Not all requests can be sent to non-leader replicas. In
particular, some requests such as reads within read-write transactions must be sent to a
designated leader replica. These requests ignore DirectedReadOptions.
etag(String etag)
public static Options.DeleteAdminApiOption etag(String etag)
Specifying this will help in optimistic concurrency control as a way to help prevent
simultaneous deletes of an instance config from overwriting each other. Operations that support
this option are:
| Parameter |
|---|
| Name | Description |
etag | String
|
filter(String filter)
public static Options.ListOption filter(String filter)
Specifying this will cause the given filter to be applied to the list operation. List
operations that support this options are:
If this option is passed to any other list operation, it will throw an
IllegalArgumentException.
| Parameter |
|---|
| Name | Description |
filter | String
An expression for filtering the results of the request. Filter rules are case
insensitive. Some examples of using filters are:
- name:* The entity has a name.
- name:Howl The entity's name contains "howl".
- name:HOWL Equivalent to above.
- NAME:howl Equivalent to above.
- labels.env:* The entity has the label env.
- labels.env:dev The entity has a label env whose value contains "dev".
- name:howl labels.env:dev The entity's name contains "howl" and it has the label env
whose value contains "dev".
|
limit(long limit)
public static Options.ReadOption limit(long limit)
Specifying this will cause the read to yield at most this many rows. This should be greater
than 0.
| Parameter |
|---|
| Name | Description |
limit | long
|
optimisticLock()
public static Options.TransactionOption optimisticLock()
Specifying this instructs the transaction to request Optimistic Lock from the backend. In this
concurrency mode, operations during the execution phase, i.e., reads and queries, are performed
without acquiring locks, and transactional consistency is ensured by running a validation
process in the commit phase (when any needed locks are acquired). The validation process
succeeds only if there are no conflicting committed transactions (that committed mutations to
the read data at a commit timestamp after the read timestamp).
pageSize(int pageSize)
public static Options.ListOption pageSize(int pageSize)
Specifying this will cause the list operations to fetch at most this many records in a page.
| Parameter |
|---|
| Name | Description |
pageSize | int
|
pageToken(String pageToken)
public static Options.ListOption pageToken(String pageToken)
Specifying this will cause the list operation to start fetching the record from this onwards.
| Parameter |
|---|
| Name | Description |
pageToken | String
|
prefetchChunks(int prefetchChunks)
public static Options.ReadAndQueryOption prefetchChunks(int prefetchChunks)
Specifying this will allow the client to prefetch up to prefetchChunks
PartialResultSet chunks for read and query. The data size of each chunk depends on the server
implementation but a good rule of thumb is that each chunk will be up to 1 MiB. Larger values
reduce the likelihood of blocking while consuming results at the cost of greater memory
consumption. prefetchChunks should be greater than 0. To get good performance choose a
value that is large enough to allow buffering of chunks for an entire row. Apart from the
buffered chunks, there can be at most one more row buffered in the client.
| Parameter |
|---|
| Name | Description |
prefetchChunks | int
|
priority(Options.RpcPriority priority)
public static Options.ReadQueryUpdateTransactionOption priority(Options.RpcPriority priority)
Specifies the priority to use for the RPC.
tag(String name)
public static Options.ReadQueryUpdateTransactionOption tag(String name)
Specifying this will cause the reads, queries, updates and writes operations statistics
collection to be grouped by tag.
| Parameter |
|---|
| Name | Description |
name | String
|
validateOnly(Boolean validateOnly)
public static Options.CreateUpdateDeleteAdminApiOption validateOnly(Boolean validateOnly)
Specifying this will not actually execute a request, and provide the same response. Operations
that support this option are:
| Parameter |
|---|
| Name | Description |
validateOnly | Boolean
|
Methods
equals(Object o)
public boolean equals(Object o)
| Parameter |
|---|
| Name | Description |
o | Object
|
Overrides
hashCode()
| Returns |
|---|
| Type | Description |
int | |
Overrides
toString()
Overrides
