Module proto 

Available on crate feature declarative-plans only.

Protobuf wire format mirroring the kernel’s plan / schema / expression IR.

Each submodule wraps the prost-generated code for one .proto file in kernel/proto/. Consumers can serialise a kernel-built plan and ship it across a process / language boundary (Rust kernel -> JVM engine, etc.).

• schema – mirror of kernel/src/schema/mod.rs (DataType, PrimitiveType, StructType, …).
• expressions – mirror of kernel/src/expressions/mod.rs and scalars.rs (Expression, Predicate, Scalar, ColumnName, …).
• plan – mirror of kernel/src/plans/ir/{plan,nodes}.rs (Plan, PlanNode, Operator, per-variant payload messages).
• operation – mirror of kernel/src/plans/ir/operation.rs (Operation, IoOperation, and the I/O payload messages).

Modules

expressions

operation

plan

schema