Module last_non_null 

Structs

ClosureLimits 🔒

Constraints checked on complete closures, never on partial seed inputs.

LastNonNullPicker 🔒

Picker for MergeMode::LastNonNull.

Functions

build_closed_outputs 🔒

Each seed and snapshot file is consumed at most once. Absorbing a seed also absorbs its disconnected members: a merge stream must never be split across independently scheduled outputs.

close_outputs 🔒

Attempts seeds in priority order until valid closures fill the output budget. Returns indices into the original seed list for all attempted/absorbed seeds, including rejected closures but excluding seeds left behind by the budget.

expand_closure 🔒

Expands one seed into its full merge closure: absorb every connected seed and every overlapping snapshot file, transitively. Growing output.inputs while iterating is what makes the expansion transitive.

extend_inputs 🔒

Appends never-seen inputs and removes them from the overlap index so the same file is neither expanded nor scheduled twice.

inputs_precede_memtables 🔒

Imported SSTs can be newer than pending writes. A merge must not attach an old field to a sequence above an intermediate version left in a memtable.