Module protocol 

Shared protocol constants and types used by the storage codec, the HTTP/2 server, and the msgpack wire codec.

The actual wire encoding lives in crate::msgpack_codec; this module holds the data-type tag taxonomy (also used by the storage codec to keep a single set of type identifiers across storage and wire), the error code enum, and the column description used in query response schemas.

Structs

ColumnDescription

Enums

ErrorCode

Constants

DEFAULT_MAX_MESSAGE_SIZE

Default maximum HTTP body size (64 MB).

SEVERITY_ERROR

ErrorResponse severity byte for non-fatal errors.

SEVERITY_FATAL

ErrorResponse severity byte for fatal errors.

TAG_BIG_INT

TAG_BOOLEAN

TAG_BYTES

TAG_DOUBLE

TAG_FLOAT

TAG_INSTANT

TAG_KEYWORD

TAG_LONG

TAG_MAP

TAG_REF

Reserved for a future DataType::Ref variant.

TAG_STRING

TAG_UNION

Column-description-only tag for unions of concrete types.

TAG_UNKNOWN

Column-description-only tag for indeterminate column types.

TAG_UUID

TAG_VECTOR

Functions

data_type_tag

Returns the DataType tag byte for a value (see TAG_* constants).

micros_to_datetime

Convert microseconds since Unix epoch to a DateTime<Utc>.