Struct mz_catalog::expr_cache::ExpressionCache

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pub struct ExpressionCache {
    deploy_generation: u64,
    durable_cache: DurableCache<ExpressionCodec>,
}
Expand description

A durable cache of optimized expressions.

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§deploy_generation: u64§durable_cache: DurableCache<ExpressionCodec>

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impl ExpressionCache

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pub async fn open( __arg0: ExpressionCacheConfig, ) -> (Self, BTreeMap<GlobalId, LocalExpressions>, BTreeMap<GlobalId, GlobalExpressions>)

Creates a new ExpressionCache and reconciles all entries in current deploy generation. Reconciliation will remove all entries that are not in current_ids and remove all entries that have optimizer features that are not equal to optimizer_features.

If remove_prior_gens is true, then all previous generations are durably removed from the cache.

If compact_shard is true, then this function will block on fully compacting the backing persist shard.

Returns all cached expressions in the current deploy generation, after reconciliation.

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async fn try_open( &mut self, current_ids: &BTreeSet<GlobalId>, remove_prior_gens: bool, compact_shard: bool, dyncfgs: &ConfigSet, ) -> Result<(BTreeMap<GlobalId, LocalExpressions>, BTreeMap<GlobalId, GlobalExpressions>), Error>

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async fn update( &mut self, new_local_expressions: Vec<(GlobalId, LocalExpressions)>, new_global_expressions: Vec<(GlobalId, GlobalExpressions)>, invalidate_ids: BTreeSet<GlobalId>, )

Durably removes all entries given by invalidate_ids and inserts new_local_expressions and new_global_expressions into current deploy generation.

If there is a duplicate ID in both invalidate_ids and one of the new expressions vector, then the final value will be taken from the new expressions vector.

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