icydb-core 0.94.0

IcyDB — A schema-first typed query engine and persistence runtime for Internet Computer canisters
Documentation 
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//! Module: db::query::intent::policy
//! Responsibility: intent-policy validation before planner compilation.
//! Does not own: logical-plan construction or executor runtime behavior.
//! Boundary: enforces query-shape and key-access policy on intent-owned state.

use crate::db::query::{
    intent::{IntentError, KeyAccessKind, state::QueryIntent},
    plan::{
        IntentKeyAccessKind as IntentValidationKeyAccessKind, validate_intent_key_access_policy,
        validate_intent_plan_shape,
    },
};

impl<K> QueryIntent<K> {
    /// Validate intent policy shape before planning.
    pub(in crate::db::query::intent) fn validate_policy_shape(&self) -> Result<(), IntentError> {
        let scalar_intent = self.scalar();
        validate_intent_plan_shape(self.mode(), scalar_intent.order.as_ref(), self.is_grouped())
            .map_err(IntentError::from)?;

        validate_intent_key_access_policy(
            scalar_intent.key_access_conflict,
            scalar_intent
                .key_access
                .as_ref()
                .map(|state| match state.kind {
                    KeyAccessKind::Single => IntentValidationKeyAccessKind::Single,
                    KeyAccessKind::Many => IntentValidationKeyAccessKind::Many,
                    KeyAccessKind::Only => IntentValidationKeyAccessKind::Only,
                }),
            scalar_intent.predicate.is_some(),
        )
        .map_err(IntentError::from)?;

        Ok(())
    }
}