ReadonlyarchetypesReadonlycomponentReadonlyindexesReadonlyresourcesOptionaloptions: EntitySelectOptions<Execute a transaction on the store. The transactionFunction must NOT directly mutate archetype rows as those changes would not be captured. Instead, use the store's update and delete and archetype insert methods to make changes.
A promise that resolves when the transaction is complete.
See Store.pruneToSchema. Also syncs the transactional resource wrapper.
Optionaloptions: ArchetypeQueryOptions<C, PK>Read exactly the components of archetype. A membership GATE: returns
null unless the entity is a superset of archetype. The result is
narrowed to the archetype's own row — reading a component outside
archetype off the result is a compile error (use a wider archetype, the
component-list overload, or read(entity)).
Read a chosen subset of an entity's components.
A pure PROJECTION, not a membership gate: returns null only when the
entity does not exist. A requested component the entity does not have
comes back absent — the field stays optional in the result, exactly as
from the full read(entity).
Prefer this over read(entity) when only a few fields are needed: it
names the exact components touched, so db.derive can scope its
recompute to just those fields instead of the whole entity. id is not a
readable component (you already hold it); the element type is inferred as
a literal union.
Optionaloptions: EntitySelectOptions<Serialize the store to a plain snapshot. When copy is true the snapshot
is detached from the live store (column/entity buffers are copied) so it
remains valid after subsequent mutations; otherwise it references live
buffers and is only valid until the next mutation. See Database.toData()
for the bug this copy flag addresses for transient-bearing strategies.
options.scope selects which persistent quadrants to emit; omit for all.
Optionaloptions: ToDataOptions
Count the entities
selectwould return for the same arguments — without building an entity array. With nowherefilter it sums matched archetype row counts (O(matched archetypes));orderis ignored (irrelevant to a count).