SelectFields class - Amazon Glue
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SelectFields class

The SelectFields class creates a new DynamicFrame from an existing DynamicFrame, and keeps only the fields that you specify. SelectFields provides similar functionality to a SQL SELECT statement.

Example

We recommend that you use the DynamicFrame.select_fields() method to select fields from a DynamicFrame. To view a code example, see Example: Use select_fields to create a new DynamicFrame with chosen fields.

Methods

__call__(frame, paths, transformation_ctx = "", info = "", stageThreshold = 0, totalThreshold = 0)

Gets fields (nodes) in a DynamicFrame.

  • frame – The DynamicFrame to select fields in (required).

  • paths – A list of full paths to the fields to select (required).

  • transformation_ctx – A unique string that is used to identify state information (optional).

  • info – A string that is associated with errors in the transformation (optional).

  • stageThreshold – The maximum number of errors that can occur in the transformation before it errors out (optional). The default is zero.

  • totalThreshold – The maximum number of errors that can occur overall before processing errors out (optional). The default is zero.

Returns a new DynamicFrame that contains only the specified fields.

apply(cls, *args, **kwargs)

Inherited from GlueTransform Apply.

name(cls)

Inherited from GlueTransform Name.

describeArgs(cls)

Inherited from GlueTransform describeArgs.

describeReturn(cls)

Inherited from GlueTransform describeReturn.

describeTransform(cls)

Inherited from GlueTransform describeTransform.

describeErrors(cls)

Inherited from GlueTransform describeErrors.

describe(cls)

Inherited from GlueTransform Describe.