Struct mz_adapter::catalog::transact::ObjectsToDrop

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pub(crate) struct ObjectsToDrop {
    pub comments: BTreeSet<CommentObjectId>,
    pub databases: BTreeSet<DatabaseId>,
    pub schemas: BTreeMap<SchemaSpecifier, ResolvedDatabaseSpecifier>,
    pub clusters: BTreeSet<ClusterId>,
    pub replicas: BTreeMap<ReplicaId, (ClusterId, ReplicaCreateDropReason)>,
    pub roles: BTreeSet<RoleId>,
    pub items: Vec<CatalogItemId>,
    pub network_policies: BTreeSet<NetworkPolicyId>,
}
Expand description

All of the objects that need to be removed in response to an Op::DropObjects.

Note: Previously we used to omit a single Op::DropObject for every object we needed to drop. But removing a batch of objects from a durable Catalog Transaction is O(n) where n is the number of objects that exist in the Catalog. This resulted in an unacceptable O(m * n) performance for a DROP ... CASCADE statement.

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§comments: BTreeSet<CommentObjectId>§databases: BTreeSet<DatabaseId>§schemas: BTreeMap<SchemaSpecifier, ResolvedDatabaseSpecifier>§clusters: BTreeSet<ClusterId>§replicas: BTreeMap<ReplicaId, (ClusterId, ReplicaCreateDropReason)>§roles: BTreeSet<RoleId>§items: Vec<CatalogItemId>§network_policies: BTreeSet<NetworkPolicyId>

Implementations§

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impl ObjectsToDrop

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pub fn generate( drop_object_infos: impl IntoIterator<Item = DropObjectInfo>, state: &CatalogState, session: Option<&ConnMeta>, ) -> Result<Self, AdapterError>

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fn add_item( &mut self, drop_object_info: DropObjectInfo, state: &CatalogState, session: Option<&ConnMeta>, ) -> Result<(), AdapterError>

Trait Implementations§

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impl Debug for ObjectsToDrop

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

Formats the value using the given formatter. Read more
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impl Default for ObjectsToDrop

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fn default() -> ObjectsToDrop

Returns the “default value” for a type. Read more

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