Module transform 

Record transformation pipeline.

Built-in transforms (optional Cargo features)

Variant	Feature flag	Default
RecordTransform::Flatten	transform-flatten	enabled
RecordTransform::RenameKeys	transform-rename-keys	enabled
RecordTransform::KeysCase	transform-keys-case	enabled
RecordTransform::Select	transform-select	off
RecordTransform::Drop	transform-drop	off
RecordTransform::Set	transform-set	off
RecordTransform::RenameField	transform-rename-field	off
RecordTransform::Cast	transform-cast	off
RecordTransform::Redact	transform-redact	off
RecordTransform::ValueCase	transform-value-case	off
RecordTransform::SpellSymbols	transform-spell-symbols	off

The transforms aggregate feature pulls in every variant above.

Disable a transform (and its dependencies) by opting out of its feature:

[dependencies]
faucet-stream = { version = "*", default-features = false,
                  features = ["transform-flatten"] }

Stage-level transforms (filter / explode)

filter and explode are not RecordTransform variants — they live as crate::stage::TransformStage::Filter / TransformStage::Explode because they may emit 0 or N records per input. Their feature flags are transform-filter and transform-explode. See the stage module for details.

Custom transforms

RecordTransform::Custom is always available regardless of features. Pass any closure or function pointer via RecordTransform::custom.

Enums

CastOnErrortransform-cast

Failure policy for RecordTransform::Cast. Default: Error.

CastTypetransform-cast

Target type for RecordTransform::Cast.

CompiledTransform

Pre-compiled form of a RecordTransform.

KeyCaseModetransform-keys-case

Output convention for RecordTransform::KeysCase.

RecordTransform

A transformation applied to every record fetched by a source (e.g. the REST source’s RestStream).

ValueCaseModetransform-value-case

String-value casing mode for RecordTransform::ValueCase.

Functions

apply_all

Apply a slice of pre-compiled transforms to a record, in order.

compile

Compile a RecordTransform into its CompiledTransform form.

default_symbol_maptransform-spell-symbols

Built-in symbol → word map used by RecordTransform::SpellSymbols.