Enum ColumnGen 

pub enum ColumnGen {
    Field {
        field: &'static Field,
        modifier: String,
        transform: Transform,
        range: Option<RangeSpec>,
        ordering: Ordering,
        omit_pct: Option<u8>,
        zipf: Option<ZipfSpec>,
    },
    Literal(String),
    Aggr {
        func: AggrFunc,
        source_col: String,
        group_by: Option<String>,
    },
    Ref {
        source_col: String,
        modifier: String,
    },
    Expr {
        left: ExprOperand,
        op: ExprOp,
        right: ExprOperand,
        result_type: ExprResultType,
    },
    Fk {
        parent_table: String,
        parent_col_name: String,
        parent_field: &'static Field,
        parent_modifier: String,
        parent_range: Option<RangeSpec>,
        parent_ordering: Ordering,
        parent_count: u64,
        distribution: FkDistribution,
        parent_domain_hash: u64,
        parent_ctx: Box<ParentCtx>,
    },
    FkDeref {
        anchor_col: String,
        deref_col_name: String,
        deref_field: &'static Field,
        deref_modifier: String,
        deref_range: Option<RangeSpec>,
        deref_ordering: Ordering,
        deref_domain_hash: u64,
        parent_ctx: Box<ParentCtx>,
    },
}

Variants

Field

Fields

field: &'static Field

modifier: String

transform: Transform

range: Option<RangeSpec>

ordering: Ordering

omit_pct: Option<u8>

zipf: Option<ZipfSpec>

Literal(String)

Aggr

Fields

func: AggrFunc

source_col: String

group_by: Option<String>

Ref

Fields

source_col: String

modifier: String

Expr

Fields

left: ExprOperand

op: ExprOp

right: ExprOperand

result_type: ExprResultType

Fk

Foreign-key anchor: samples a row from the parent table and generates the parent field value. parent_domain_hash is zero at parse time; set by finalize_fk_columns.

Fields

parent_table: String

parent_col_name: String

parent_field: &'static Field

parent_modifier: String

parent_range: Option<RangeSpec>

parent_ordering: Ordering

Ordering of the parent column (asc/desc/none). Propagated into the GenContext used to regenerate the parent field value, otherwise monotonic fields like timestamp:asc fall back to random output.

parent_count: u64

distribution: FkDistribution

parent_domain_hash: u64

Pre-computed hash of the parent field; set at orchestration time.

parent_ctx: Box<ParentCtx>

FkDeref

Foreign-key dereference: reuses the row index sampled by an Fk anchor column in this table to generate a different field of the same parent row. deref_domain_hash is zero at parse time; set by finalize_fk_columns.

Fields

anchor_col: String

deref_col_name: String

deref_field: &'static Field

deref_modifier: String

deref_range: Option<RangeSpec>

deref_ordering: Ordering

Ordering of the dereferenced parent column — same role as parent_ordering.

deref_domain_hash: u64

Pre-computed hash of the dereferenced parent field; set at orchestration time.

parent_ctx: Box<ParentCtx>

Trait Implementations

impl Clone for ColumnGen

fn clone(&self) -> ColumnGen

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ColumnGen

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

Formats the value using the given formatter.