com.google.cloud.dataflow.sdk.io

Class BigQueryIO.Read.Bound

java.lang.Object

com.google.cloud.dataflow.sdk.transforms.PTransform<PInput,PCollection<TableRow>>

com.google.cloud.dataflow.sdk.io.BigQueryIO.Read.Bound

All Implemented Interfaces:

java.io.Serializable

Enclosing class:

BigQueryIO.Read

public static class BigQueryIO.Read.Bound
extends PTransform<PInput,PCollection<TableRow>>

A PTransform that reads from a BigQuery table and returns a bounded PCollection<TableRow>.

See Also:

Serialized Form

Field Summary

Fields inherited from class com.google.cloud.dataflow.sdk.transforms.PTransform

name

Method Summary

Methods

Modifier and Type	Method and Description
PCollection<TableRow>	apply(PInput input) Applies this PTransform on the given Input, and returns its Output.
BigQueryIO.Read.Bound	from(java.lang.String tableSpec) Sets the table specification.
BigQueryIO.Read.Bound	from(TableReference table) Sets the table specification.
protected Coder<TableRow>	getDefaultOutputCoder() Returns the default Coder to use for the output of this single-output PTransform, or null if none can be inferred.
protected java.lang.String	getKindString() Returns a string describing what kind of PTransform this is.
TableReference	getTable() Returns the table to write.
boolean	getValidate() Returns true if table validation is enabled.
BigQueryIO.Read.Bound	named(java.lang.String name) Sets the name associated with this transformation.
BigQueryIO.Read.Bound	withoutValidation() Disable table validation.

Methods inherited from class com.google.cloud.dataflow.sdk.transforms.PTransform

finishSpecifying, getCoderRegistry, getDefaultName, getDefaultOutputCoder, getInput, getName, getOutput, getPipeline, setName, setPipeline, toString, withName

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Method Detail

named

public BigQueryIO.Read.Bound named(java.lang.String name)

Sets the name associated with this transformation.

from

public BigQueryIO.Read.Bound from(java.lang.String tableSpec)

Sets the table specification.

Refer to BigQueryIO.parseTableSpec(String) for the specification format.

from

public BigQueryIO.Read.Bound from(TableReference table)

Sets the table specification.

withoutValidation

public BigQueryIO.Read.Bound withoutValidation()

Disable table validation.

apply

public PCollection<TableRow> apply(PInput input)

Description copied from class: PTransform

Applies this PTransform on the given Input, and returns its Output.

Composite transforms, which are defined in terms of other transforms, should return the output of one of the composed transforms. Non-composite transforms, which do not apply any transforms internally, should return a new unbound output and register evaluators (via backend-specific registration methods).

The default implementation throws an exception. A derived class must either implement apply, or else each runner must supply a custom implementation via PipelineRunner.apply(com.google.cloud.dataflow.sdk.transforms.PTransform<Input, Output>, Input).

Overrides:

apply in class PTransform<PInput,PCollection<TableRow>>

getDefaultOutputCoder

protected Coder<TableRow> getDefaultOutputCoder()

Description copied from class: PTransform

Returns the default Coder to use for the output of this single-output PTransform, or null if none can be inferred.

By default, returns null.

Overrides:

getDefaultOutputCoder in class PTransform<PInput,PCollection<TableRow>>

getKindString

protected java.lang.String getKindString()

Description copied from class: PTransform

Returns a string describing what kind of PTransform this is.

By default, returns the base name of this PTransform's class.

Overrides:

getKindString in class PTransform<PInput,PCollection<TableRow>>

getTable

public TableReference getTable()

Returns the table to write.

getValidate

public boolean getValidate()

Returns true if table validation is enabled.