Enum ColumnOp 

pub enum ColumnOp {
    Identity,
    Rename(Vec<(String, String)>),
    Select(Vec<String>),
    Drop(Vec<String>),
    Set(Vec<String>),
    Opaque,
}

A lineage-relevant view of one transform stage. The CLI maps its resolved transform specs onto these.

Variants

Identity

Keys unchanged (cast / redact / value_case / spell_symbols / filter).

Rename(Vec<(String, String)>)

Explicit 1:1 key renames (old → new).

Select(Vec<String>)

Keep only these top-level keys.

Drop(Vec<String>)

Remove these top-level keys.

Set(Vec<String>)

Add these new keys as literals (no upstream edge).

Opaque

Structure-changing / key-rewriting / unknown — lineage not derivable.

Trait Implementations

impl Clone for ColumnOp

fn clone(&self) -> ColumnOp

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ColumnOp

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.