Struct RetrieveStep 

pub struct RetrieveStep {
    pub store_name: String,
    pub where_expr: String,
    pub alias: String,
    pub order_by: String,
    pub limit_expr: String,
    pub aggregate: String,
    pub group_by: String,
    pub cache: String,
    pub loc: Loc,
}

Fields

store_name: String

where_expr: String

alias: String

order_by: String

v2.21.0 — optional order_by: clause: a closed comma-separated list of column [asc|desc] (same identifier discipline as where: columns — no injection). Empty = no ordering. Raw string, parsed + validated by the runtime (filter::render_bounds) and at axon check (v1.31.0 axon-T807).

limit_expr: String

v2.21.0 — optional limit: clause: a u32 literal OR a ${binding} resolved to a u32 at runtime. Empty = no limit. Raw string ("100" or "${max}"), validated at axon check (v1.31.0 axon-T808).

aggregate: String

v2.33.0 — optional aggregate: clause: a member of the CLOSED catalog count | sum(<col>) | avg(<col>) | min(<col>) | max(<col>). Empty = a plain SELECT * retrieve. Raw string, parsed + validated by the runtime (filter::parse_aggregate_clause) and at axon check (v2.33.0 axon-T843/T844/T845).

group_by: String

v2.33.0 — optional group_by: clause: a comma-separated list of column identifiers (same discipline as order_by: columns). Requires an aggregate:. Empty = no grouping.

cache: String

v2.40.0 — optional cache: reference. A retrieve reads a store (a storage effect — never pure), so caching it is always a WIDENING that accepts staleness: the named cache MUST carry a finite ttl: (axon-T865) and typically an invalidate_on:. Names a declared cache (axon-T864); empty = uncached. Never governed by a default: true policy (defaults only auto-cover provably-pure tools).

loc: Loc

Trait Implementations

impl Debug for RetrieveStep

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

Formats the value using the given formatter.