dpone-native-accel
dpone-native-accel is the optional provider package for dpone native-transfer
acceleration. It contains the certified MSSQL BCP native -> ClickHouse Native
block encoder and the direct ClickHouse Native TCP ingest backend.
The direct ingest backend sends pre-encoded ClickHouse Native blocks through the
Native TCP protocol without spawning clickhouse-client. native_tcp.backend: auto selects this backend when the provider is installed and certified;
backend: client keeps the subprocess fallback for compatibility benchmarks.
Optional provider package for dpone native-transfer acceleration.
The package exposes the stable provider boundary used by dpone[accel].
Backends declare certified capabilities before dpone can select them for
native_transfer.wire.acceleration.mode: auto|required.
The v0.33 provider includes a fused MSSQL BCP native -> ClickHouse Native block
encoder and a direct ClickHouse Native TCP insert backend. Direct insert uses a
native-protocol INSERT ... VALUES query plus protocol Data packets; it does
not shell out to clickhouse-client and does not materialize Python row
objects.
Certification covers signed/unsigned integers, bool, Float32/Float64 finite extremes, Decimal128/Decimal256 max/min scaled values, nullable decimals, Unicode text, tabs/newlines, binary payloads, UUID, Date/Date32, DateTime/DateTime64 precision, FixedString padding and oversize rejection, and NULL versus empty values. Unsupported layouts fall back to the reference path unless acceleration is explicitly required.
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