Reference documentation and code samples for the Google BigQuery Storage V1 Client class ReadSession.
Information about the ReadSession.
Generated from protobuf message google.cloud.bigquery.storage.v1.ReadSession
Namespace
Google \ Cloud \ BigQuery \ Storage \ V1Methods
__construct
Constructor.
| Parameters | |
|---|---|
| Name | Description |
data |
array
Optional. Data for populating the Message object. |
↳ name |
string
Output only. Unique identifier for the session, in the form |
↳ expire_time |
Google\Protobuf\Timestamp
Output only. Time at which the session becomes invalid. After this time, subsequent requests to read this Session will return errors. The expire_time is automatically assigned and currently cannot be specified or updated. |
↳ data_format |
int
Immutable. Data format of the output data. DATA_FORMAT_UNSPECIFIED not supported. |
↳ avro_schema |
AvroSchema
Output only. Avro schema. |
↳ arrow_schema |
ArrowSchema
Output only. Arrow schema. |
↳ table |
string
Immutable. Table that this ReadSession is reading from, in the form |
↳ table_modifiers |
ReadSession\TableModifiers
Optional. Any modifiers which are applied when reading from the specified table. |
↳ read_options |
ReadSession\TableReadOptions
Optional. Read options for this session (e.g. column selection, filters). |
↳ streams |
array<ReadStream>
Output only. A list of streams created with the session. At least one stream is created with the session. In the future, larger request_stream_count values may result in this list being unpopulated, in that case, the user will need to use a List method to get the streams instead, which is not yet available. |
↳ estimated_total_bytes_scanned |
int|string
Output only. An estimate on the number of bytes this session will scan when all streams are completely consumed. This estimate is based on metadata from the table which might be incomplete or stale. |
↳ estimated_total_physical_file_size |
int|string
Output only. A pre-projected estimate of the total physical size of files (in bytes) that this session will scan when all streams are consumed. This estimate is independent of the selected columns and can be based on incomplete or stale metadata from the table. This field is only set for BigLake tables. |
↳ estimated_row_count |
int|string
Output only. An estimate on the number of rows present in this session's streams. This estimate is based on metadata from the table which might be incomplete or stale. |
↳ trace_id |
string
Optional. ID set by client to annotate a session identity. This does not need to be strictly unique, but instead the same ID should be used to group logically connected sessions (e.g. All using the same ID for all sessions needed to complete a Spark SQL query is reasonable). Maximum length is 256 bytes. |
getName
Output only. Unique identifier for the session, in the form
projects/{project_id}/locations/{location}/sessions/{session_id}.
| Returns | |
|---|---|
| Type | Description |
string |
|
setName
Output only. Unique identifier for the session, in the form
projects/{project_id}/locations/{location}/sessions/{session_id}.
| Parameter | |
|---|---|
| Name | Description |
var |
string
|
| Returns | |
|---|---|
| Type | Description |
$this |
|
getExpireTime
Output only. Time at which the session becomes invalid. After this time, subsequent requests to read this Session will return errors. The expire_time is automatically assigned and currently cannot be specified or updated.
| Returns | |
|---|---|
| Type | Description |
Google\Protobuf\Timestamp|null |
|
hasExpireTime
clearExpireTime
setExpireTime
Output only. Time at which the session becomes invalid. After this time, subsequent requests to read this Session will return errors. The expire_time is automatically assigned and currently cannot be specified or updated.
| Parameter | |
|---|---|
| Name | Description |
var |
Google\Protobuf\Timestamp
|
| Returns | |
|---|---|
| Type | Description |
$this |
|
getDataFormat
Immutable. Data format of the output data. DATA_FORMAT_UNSPECIFIED not supported.
| Returns | |
|---|---|
| Type | Description |
int |
|
setDataFormat
Immutable. Data format of the output data. DATA_FORMAT_UNSPECIFIED not supported.
| Parameter | |
|---|---|
| Name | Description |
var |
int
|
| Returns | |
|---|---|
| Type | Description |
$this |
|
getAvroSchema
Output only. Avro schema.
| Returns | |
|---|---|
| Type | Description |
AvroSchema|null |
|
hasAvroSchema
setAvroSchema
Output only. Avro schema.
| Parameter | |
|---|---|
| Name | Description |
var |
AvroSchema
|
| Returns | |
|---|---|
| Type | Description |
$this |
|
getArrowSchema
Output only. Arrow schema.
| Returns | |
|---|---|
| Type | Description |
ArrowSchema|null |
|
hasArrowSchema
setArrowSchema
Output only. Arrow schema.
| Parameter | |
|---|---|
| Name | Description |
var |
ArrowSchema
|
| Returns | |
|---|---|
| Type | Description |
$this |
|
getTable
Immutable. Table that this ReadSession is reading from, in the form
projects/{project_id}/datasets/{dataset_id}/tables/{table_id}
| Returns | |
|---|---|
| Type | Description |
string |
|
setTable
Immutable. Table that this ReadSession is reading from, in the form
projects/{project_id}/datasets/{dataset_id}/tables/{table_id}
| Parameter | |
|---|---|
| Name | Description |
var |
string
|
| Returns | |
|---|---|
| Type | Description |
$this |
|
getTableModifiers
Optional. Any modifiers which are applied when reading from the specified table.
| Returns | |
|---|---|
| Type | Description |
ReadSession\TableModifiers|null |
|
hasTableModifiers
clearTableModifiers
setTableModifiers
Optional. Any modifiers which are applied when reading from the specified table.
| Parameter | |
|---|---|
| Name | Description |
var |
ReadSession\TableModifiers
|
| Returns | |
|---|---|
| Type | Description |
$this |
|
getReadOptions
Optional. Read options for this session (e.g. column selection, filters).
| Returns | |
|---|---|
| Type | Description |
ReadSession\TableReadOptions|null |
|
hasReadOptions
clearReadOptions
setReadOptions
Optional. Read options for this session (e.g. column selection, filters).
| Parameter | |
|---|---|
| Name | Description |
var |
ReadSession\TableReadOptions
|
| Returns | |
|---|---|
| Type | Description |
$this |
|
getStreams
Output only. A list of streams created with the session.
At least one stream is created with the session. In the future, larger request_stream_count values may result in this list being unpopulated, in that case, the user will need to use a List method to get the streams instead, which is not yet available.
| Returns | |
|---|---|
| Type | Description |
Google\Protobuf\Internal\RepeatedField |
|
setStreams
Output only. A list of streams created with the session.
At least one stream is created with the session. In the future, larger request_stream_count values may result in this list being unpopulated, in that case, the user will need to use a List method to get the streams instead, which is not yet available.
| Parameter | |
|---|---|
| Name | Description |
var |
array<ReadStream>
|
| Returns | |
|---|---|
| Type | Description |
$this |
|
getEstimatedTotalBytesScanned
Output only. An estimate on the number of bytes this session will scan when all streams are completely consumed. This estimate is based on metadata from the table which might be incomplete or stale.
| Returns | |
|---|---|
| Type | Description |
int|string |
|
setEstimatedTotalBytesScanned
Output only. An estimate on the number of bytes this session will scan when all streams are completely consumed. This estimate is based on metadata from the table which might be incomplete or stale.
| Parameter | |
|---|---|
| Name | Description |
var |
int|string
|
| Returns | |
|---|---|
| Type | Description |
$this |
|
getEstimatedTotalPhysicalFileSize
Output only. A pre-projected estimate of the total physical size of files (in bytes) that this session will scan when all streams are consumed. This estimate is independent of the selected columns and can be based on incomplete or stale metadata from the table. This field is only set for BigLake tables.
| Returns | |
|---|---|
| Type | Description |
int|string |
|
setEstimatedTotalPhysicalFileSize
Output only. A pre-projected estimate of the total physical size of files (in bytes) that this session will scan when all streams are consumed. This estimate is independent of the selected columns and can be based on incomplete or stale metadata from the table. This field is only set for BigLake tables.
| Parameter | |
|---|---|
| Name | Description |
var |
int|string
|
| Returns | |
|---|---|
| Type | Description |
$this |
|
getEstimatedRowCount
Output only. An estimate on the number of rows present in this session's streams. This estimate is based on metadata from the table which might be incomplete or stale.
| Returns | |
|---|---|
| Type | Description |
int|string |
|
setEstimatedRowCount
Output only. An estimate on the number of rows present in this session's streams. This estimate is based on metadata from the table which might be incomplete or stale.
| Parameter | |
|---|---|
| Name | Description |
var |
int|string
|
| Returns | |
|---|---|
| Type | Description |
$this |
|
getTraceId
Optional. ID set by client to annotate a session identity. This does not need to be strictly unique, but instead the same ID should be used to group logically connected sessions (e.g. All using the same ID for all sessions needed to complete a Spark SQL query is reasonable).
Maximum length is 256 bytes.
| Returns | |
|---|---|
| Type | Description |
string |
|
setTraceId
Optional. ID set by client to annotate a session identity. This does not need to be strictly unique, but instead the same ID should be used to group logically connected sessions (e.g. All using the same ID for all sessions needed to complete a Spark SQL query is reasonable).
Maximum length is 256 bytes.
| Parameter | |
|---|---|
| Name | Description |
var |
string
|
| Returns | |
|---|---|
| Type | Description |
$this |
|
getSchema
| Returns | |
|---|---|
| Type | Description |
string |
|