Module batch 

Schema-bound, allocation-light physical rows and batches.

Column names belong to RowSchema, not to every row. A physical row is made from shared value fragments. Joins concatenate fragment handles while schemas remap (qualifier, column) identities to physical slots; neither operation rebuilds a string-keyed map or clones the contained values.

Structs

Batch

A schema and bounded vector of physical rows flowing between operators.

ColumnIdentity

Structured SQL column identity. A qualifier is metadata, never a prefix encoded into the column name, so quoted names containing . remain intact.

OwnedPhysicalRow

Owned schema/row pair for row-at-a-time consumers that must outlive a decoded batch. Cloning this carrier shares the immutable schema index and row fragments; it does not build a named row or clone contained values.

PhysicalRow

A physical row owns no column names. Each fragment is created by a scan or projection and shared thereafter; joining rows copies only Arc handles.

PhysicalRowView

Stack-only schema/row pair implementing the scalar evaluator’s read seam.

RowLockOrigin

Base-table identity carried on a composite physical row for FOR UPDATE.

RowSchema

Immutable column layout shared by an operator and all of its batches.

Enums

RowProjectionValue

One output position in a mixed physical projection.

Constants

DEFAULT_BATCH_SIZE

Default rows-per-batch hint.