Module thin 

TTC thin-protocol wire codecs, split across cohesive submodules. mod.rs wires the submodules and re-exports their items so every oracledb_protocol::thin::* path that downstream crates depend on stays reachable, and so submodules see each other via use super::*.

Modules

aq

Sans-io codecs for Oracle Advanced Queuing (AQ) enqueue/dequeue operations.

Structs

AcceptInfo

AuthResponse

BatchServerError

One batch error entry from executemany(batcherrors=True) (reference impl/thin/messages/base.pyx batch error codes/offsets/messages arrays).

BindTypeInfo

BorrowedFetchResult

The borrowed counterpart of a fetched QueryResult: a BorrowedRowBatch of zero-copy rows plus the response-level fields a caller needs to page and finalize the cursor. Produced by parse_query_response_borrowed.

BorrowedRowBatch

A decoded fetch batch that owns the wire response buffer and column metadata, and yields rows of borrowed QueryValueRef that point straight into that buffer. This is the zero-copy fetch fast path: the common scalar grid is decoded with no per-cell allocation.

ClientCapabilities

ColumnMetadata

CursorValue

Heap payload of QueryValue::Cursor. Boxed out of the enum because a REF CURSOR carries a full column-metadata vector — see QueryValue.

DbObjectPackedReader

ExecuteOptions

Optional execute modes (reference ExecuteMessage attributes).

LobReadResult

LobValue

Heap payload of QueryValue::Lob (LOB / BFILE locator). Boxed out of the enum — see QueryValue.

MsgQuery

One query whose result set changed (QUERYCHANGE notifications).

MsgRow

One row changed inside a table notification.

MsgTable

One table changed inside an OBJCHANGE / QUERYCHANGE notification.

NotificationMessage

A single decoded OAC notification record handed to the user callback.

ObjectValue

Heap payload of QueryValue::Object (ADT / collection image). Boxed out of the enum — see QueryValue.

QueryResult

SubscribeResult

Result of decoding the SUBSCRIBE (register) response.

TpcChangeStateResponse

Outcome of a TPC transaction change-state (func 104) round trip used by tpc_prepare / tpc_commit / tpc_rollback. Reference tpc_change_state.pyx _process_return_parameters reads the out state (ub4) from the PARAMETER message; the txn-in-progress bit is sampled from the final call status.

TpcSwitchResponse

Outcome of a TPC transaction-switch (func 103) round trip used by tpc_begin (START) and tpc_end (DETACH). Reference tpc_switch.pyx _process_return_parameters captures the application value and the returned transaction context; the txn-in-progress bit is sampled from the final call status (reference protocol.pyx _process_call_status).

TpcXid

A two-phase-commit transaction id (reference Xid namedtuple). The global_transaction_id and branch_qualifier are the raw (already UTF-8 encoded) byte values; the shim coerces str members before calling.

Enums

BindValue

NotificationRecord

Outcome of decoding one OAC record from the notification stream.

OracleNumber

Inline, lossless decimal carrier for an Oracle NUMBER.

QueryValue

QueryValueRef

A borrowed, zero-copy mirror of the hot scalar QueryValue variants whose payload lives inside the fetch decode buffer (the network response Vec<u8>). A consumer iterating a fetched row batch via the borrowed path receives QueryValueRef<'buf> values that point straight at the wire bytes — the common scalar case pays zero per-cell allocations, in contrast to the owned QueryValue path which materializes a String/Vec<u8> for every column of every row.

SessionlessTxnState

Outcome of a sessionless transaction switch / suspend round trip, as signalled by the server through the transaction-id key/value pair (reference messages/base.pyx _update_sessionless_txn_state). None means the response carried no transaction-id update.

Constants

CS_FORM_IMPLICIT

CS_FORM_NCHAR

EVENT_AQ

EVENT_DEREG

EVENT_OBJCHANGE

EVENT_QUERYCHANGE

OPCODE_ALLROWS

Table operation flag: rows are summarised (no per-row records follow).

ORA_TYPE_NUM_BFILE

ORA_TYPE_NUM_BINARY_DOUBLE

ORA_TYPE_NUM_BINARY_FLOAT

ORA_TYPE_NUM_BINARY_INTEGER

ORA_TYPE_NUM_BLOB

ORA_TYPE_NUM_BOOLEAN

ORA_TYPE_NUM_CHAR

ORA_TYPE_NUM_CLOB

ORA_TYPE_NUM_CURSOR

ORA_TYPE_NUM_DATE

ORA_TYPE_NUM_INTERVAL_DS

ORA_TYPE_NUM_INTERVAL_YM

ORA_TYPE_NUM_JSON

ORA_TYPE_NUM_LONG

ORA_TYPE_NUM_LONG_RAW

ORA_TYPE_NUM_NUMBER

ORA_TYPE_NUM_OBJECT

ORA_TYPE_NUM_RAW

ORA_TYPE_NUM_ROWID

ORA_TYPE_NUM_TIMESTAMP

ORA_TYPE_NUM_TIMESTAMP_LTZ

ORA_TYPE_NUM_TIMESTAMP_TZ

ORA_TYPE_NUM_UROWID

ORA_TYPE_NUM_VARCHAR

ORA_TYPE_NUM_VECTOR

SESSIONLESS_FORMAT_ID

Format id stamped into the XID of a sessionless transaction so the server can distinguish it from an XA global transaction (reference impl/thin/connection.pyx _SessionlessData.create_message).

SUBSCR_QOS_DEREG_NFY

SUBSCR_QOS_QUERY

SUBSCR_QOS_RELIABLE

SUBSCR_QOS_ROWIDS

TNS_AQ_ARRAY_DEQ

TNS_AQ_ARRAY_ENQ

TNS_AQ_ARRAY_FLAGS_RETURN_MESSAGE_ID

TNS_AQ_EXT_KEYWORD_AGENT_ADDRESS

TNS_AQ_EXT_KEYWORD_AGENT_NAME

TNS_AQ_EXT_KEYWORD_AGENT_PROTOCOL

TNS_AQ_EXT_KEYWORD_ORIGINAL_MSGID

TNS_AQ_MESSAGE_ID_LENGTH

TNS_AQ_MESSAGE_VERSION

TNS_AQ_MSG_BUFFERED

TNS_AQ_MSG_PERSISTENT

TNS_AQ_MSG_PERSISTENT_OR_BUFFERED

TNS_AUTH_MODE_CHANGE_PASSWORD

TNS_AUTH_MODE_LOGON

TNS_AUTH_MODE_WITH_PASSWORD

TNS_CCAP_FIELD_VERSION_12_1

ttc_field_version gate that drives the 12.1 SUBSCRIBE block / response client-id read (reference TNS_CCAP_FIELD_VERSION_12_1).

TNS_DATA_FLAGS_BEGIN_PIPELINE

TNS_DATA_FLAGS_END_OF_REQUEST

TNS_DATA_FLAGS_END_OF_RESPONSE

TNS_DATA_FLAGS_EOF

TNS_EOCS_FLAGS_TXN_IN_PROGRESS

End-of-call status flag signalling a server-side transaction is in progress (reference constants.pxi:586 TNS_EOCS_FLAGS_TXN_IN_PROGRESS). Sampled from the last STATUS / ERROR message of every round trip to drive transaction_in_progress (reference protocol.pyx _process_call_status).

TNS_ERR_NO_MESSAGES_FOUND

ORA-25228: dequeue from an empty queue with NO_WAIT returns this; the thin driver clears it and surfaces None instead (reference aq_base.pyx).

TNS_FETCH_ORIENTATION_ABSOLUTE

TNS_FETCH_ORIENTATION_CURRENT

Fetch orientations for scrollable cursors (reference constants.pxi).

TNS_FETCH_ORIENTATION_FIRST

TNS_FETCH_ORIENTATION_LAST

TNS_FETCH_ORIENTATION_NEXT

TNS_FETCH_ORIENTATION_PRIOR

TNS_FETCH_ORIENTATION_RELATIVE

TNS_FUNC_AQ_ARRAY

TNS_FUNC_AQ_DEQ

TNS_FUNC_AQ_ENQ

TNS_FUNC_AUTH_PHASE_ONE

TNS_FUNC_AUTH_PHASE_TWO

TNS_FUNC_CLOSE_CURSORS

TNS_FUNC_COMMIT

TNS_FUNC_EXECUTE

TNS_FUNC_FETCH

TNS_FUNC_LOB_OP

TNS_FUNC_LOGOFF

TNS_FUNC_NOTIFY

Arm the EMON notification stream (FUNC byte on the second/emon connection).

TNS_FUNC_PING

TNS_FUNC_PIPELINE_BEGIN

TNS_FUNC_PIPELINE_END

TNS_FUNC_ROLLBACK

TNS_FUNC_SUBSCRIBE

Register / unregister a subscription (FUNC byte on the primary connection).

TNS_FUNC_TPC_TXN_CHANGE_STATE

Two-phase-commit transaction change-state (commit/abort/prepare/forget); reference TNS_FUNC_TPC_TXN_CHANGE_STATE (impl/thin/constants.pxi:441).

TNS_FUNC_TPC_TXN_SWITCH

Two-phase-commit / sessionless transaction switch (start/attach/detach); reference TNS_FUNC_TPC_TXN_SWITCH (impl/thin/constants.pxi:440).

TNS_INIT_KPNDRREQ

TNS_KEYWORD_NUM_TRANSACTION_ID

Keyword number carrying the (binary) sessionless transaction id / state in a return-parameter key/value pair (reference constants.pxi:207).

TNS_KPD_AQ_BUFMSG

TNS_KPD_AQ_EITHER

TNS_MAX_LONG_LENGTH

TNS_MSG_TYPE_BIT_VECTOR

TNS_MSG_TYPE_DATA_TYPES

TNS_MSG_TYPE_DESCRIBE_INFO

TNS_MSG_TYPE_END_OF_RESPONSE

TNS_MSG_TYPE_ERROR

TNS_MSG_TYPE_FLUSH_OUT_BINDS

TNS_MSG_TYPE_FUNCTION

TNS_MSG_TYPE_IMPLICIT_RESULTSET

TNS_MSG_TYPE_IO_VECTOR

TNS_MSG_TYPE_LOB_DATA

TNS_MSG_TYPE_OAC

OAC data message type read at the head of the notification stream.

TNS_MSG_TYPE_PARAMETER

TNS_MSG_TYPE_PIGGYBACK

TNS_MSG_TYPE_PROTOCOL

TNS_MSG_TYPE_ROW_DATA

TNS_MSG_TYPE_ROW_HEADER

TNS_MSG_TYPE_SERVER_SIDE_PIGGYBACK

TNS_MSG_TYPE_STATUS

TNS_MSG_TYPE_TOKEN

TNS_OBJ_TOP_LEVEL

TNS_PACKET_TYPE_ACCEPT

TNS_PACKET_TYPE_CONNECT

TNS_PACKET_TYPE_DATA

TNS_PACKET_TYPE_REDIRECT

TNS_PACKET_TYPE_REFUSE

TNS_PIPELINE_MODE_ABORT_ON_ERROR

TNS_PIPELINE_MODE_CONTINUE_ON_ERROR

TNS_SUBSCR_CLIENT_ID_LEN

TNS_SUBSCR_FLAGS_INCLUDE_ROWIDS

TNS_SUBSCR_FLAGS_QUERY

TNS_SUBSCR_MODE_CLIENT_INITIATED

TNS_SUBSCR_NAMESPACE_AQ

Notification namespaces (shared numeric space with the public enums).

TNS_SUBSCR_NAMESPACE_DBCHANGE

TNS_SUBSCR_OP_REGISTER

TNS_SUBSCR_OP_UNREGISTER

TNS_SUBSCR_QOS_PURGE_ON_NTFN

TNS_SUBSCR_QOS_RELIABLE

TNS_SUBSCR_QOS_SECURE

TNS_SUBSCR_STOP_NOTIF

OAC record message_type value that ends the notification stream.

TNS_TPC_TXNID_SYNC_SERVER

TNS_TPC_TXNID_SYNC_SET

TNS_TPC_TXNID_SYNC_UNSET

TNS_TPC_TXN_ABORT

TNS_TPC_TXN_COMMIT

TNS_TPC_TXN_DETACH

TNS_TPC_TXN_FORGET

TNS_TPC_TXN_POST_DETACH

TNS_TPC_TXN_PREPARE

TNS_TPC_TXN_START

TNS_TPC_TXN_STATE_ABORTED

TNS_TPC_TXN_STATE_COMMITTED

TNS_TPC_TXN_STATE_FORGOTTEN

TNS_TPC_TXN_STATE_PREPARE

TNS_TPC_TXN_STATE_READ_ONLY

TNS_TPC_TXN_STATE_REQUIRES_COMMIT

TNS_VERIFIER_TYPE_11G_1

TNS_VERIFIER_TYPE_11G_2

TNS_VERIFIER_TYPE_12C

TPC_TXN_FLAGS_JOIN

TPC_TXN_FLAGS_NEW

TPC_TXN_FLAGS_PROMOTE

TPC_TXN_FLAGS_RESUME

TPC_TXN_FLAGS_SESSIONLESS

Functions

adjust_refetch_metadata

When the same query is re-executed after a column’s data type changed to CLOB/BLOB but the previous execution fetched the column as a char/raw type, the server streams the data as LONG/LONG RAW (same as a define of CLOB/BLOB as string/bytes); the fetch metadata must follow (reference impl/thin/messages/base.pyx:820-845 _adjust_metadata). Returns true when the metadata was adjusted.

append_auth_phase_one

append_auth_phase_two_token

Appends the auth message for token authentication (OCI IAM database token / OAuth2) to the fast-auth bundle. Unlike password auth there is no verifier challenge: the reference sends auth phase TWO directly, carrying the token in AUTH_TOKEN with no AUTH_SESSKEY/AUTH_PASSWORD and auth mode LOGON (no WITH_PASSWORD); it never resends (messages/auth.pyx _set_params/_write_message, messages/fast_auth.pyx). Because this message lives inside the fast-auth bundle (ttc field version 19.1), the function code carries no ub8 token-num — exactly like append_auth_phase_one.

bind_template_from_type_name

bind_value_type_info

build_auth_phase_two_payload

build_auth_phase_two_payload_with_context_with_seq

build_auth_phase_two_payload_with_proxy_with_seq

Phase-two auth payload with optional proxy authentication: the reference writes PROXY_CLIENT_NAME as the first key/value pair when the connect user is of the form user[proxy_user] (messages/auth.pyx).

build_auth_phase_two_payload_with_seq

build_begin_pipeline_piggyback

Begin-pipeline piggyback (messages/base.pyx _write_begin_pipeline_piggyback and _write_piggyback_code): prepended to the first pipelined message’s payload. The packet carrying it must set TNS_DATA_FLAGS_BEGIN_PIPELINE.

build_change_password_payload_with_seq

Change-password payload: an AUTH_PHASE_TWO message carrying only the combo-key-encrypted old/new passwords (reference connection.pyx _create_change_password_message + messages/auth.pyx _write_message: auth mode WITH_PASSWORD|CHANGE_PASSWORD, two pairs).

build_close_cursors_piggyback

Builds a close-cursors piggyback message (reference _write_close_cursors_piggyback + write_cursors_to_close); it is prepended to the next regular message in the same data packet and consumes a TTC sequence number of its own.

build_connect_packet_payload

build_define_fetch_payload_with_seq

build_end_pipeline_payload_with_seq

End-pipeline message (messages/end_pipeline.pyx): function 200 plus an unused ub4 identifier. Sent after every pipelined operation message; its packet carries no END_OF_REQUEST flag and its response is the final (N+1th) boundary-delimited response of the pipeline.

build_execute_payload_with_bind_rows_and_options_with_seq

build_execute_payload_with_bind_rows_with_seq

build_execute_payload_with_bind_rows_with_seq_and_token

Execute message with an explicit pipeline token; pipelined operations carry tokens 1..N (impl/thin/connection.pyx _create_messages_for_pipeline), everything else carries 0.

build_execute_payload_with_binds_with_seq

build_execute_payload_with_seq

build_execute_query_payload

build_execute_query_payload_with_seq

build_fast_auth_phase_one_payload

build_fast_auth_token_payload

Fast-auth bundle for token authentication: the same static protocol/data-types prefix as build_fast_auth_phase_one_payload, but with a phase-two AUTH_TOKEN message appended (no verifier round-trip). The caller sends this once and reads a single auth response.

build_fetch_payload

build_fetch_payload_with_seq

build_function_payload

build_function_payload_with_seq

build_function_payload_with_seq_and_token

Bare function message with an explicit pipeline token (messages/base.pyx _write_function_code writes ub8 token_num for field version >= 23.1 ext 1; non-pipelined messages carry 0).

build_lob_create_temp_payload_with_seq

build_lob_free_temp_payload_with_seq

build_lob_read_payload_with_seq

build_lob_trim_payload_with_seq

build_lob_write_payload_with_seq

build_notify_payload_with_seq

Build the NOTIFY (FUNC 187) payload sent on the emon connection. Ports notification.pyx::_write_message. The caller must transmit this packet with the TNS_DATA_FLAGS_END_OF_REQUEST data flag set.

build_sessionless_piggyback

Sessionless transaction-switch piggyback, prepended to the next execute message’s payload (reference messages/base.pyx _write_sessionless_piggyback — the same message body written with a TNS_MSG_TYPE_PIGGYBACK header). Used for a deferred begin/resume (defer_round_trip=True) and for the suspend_on_success post-detach. operation already encodes whether a post-detach is folded in (TNS_TPC_TXN_START | TNS_TPC_TXN_POST_DETACH).

build_subscribe_payload_with_seq

Build the SUBSCRIBE (FUNC 125) payload for register (opcode = 1) or unregister (opcode = 2). Ports subscribe.pyx::_write_message.

build_tpc_change_state_payload_with_seq

TPC transaction change-state payload (func 104), used by tpc_prepare (operation = TNS_TPC_TXN_PREPARE), tpc_commit (TNS_TPC_TXN_COMMIT) and tpc_rollback (TNS_TPC_TXN_ABORT). requested_state is the desired state (0 for prepare; READ_ONLY/COMMITTED for commit; ABORTED for rollback). Reference messages/tpc_change_state.pyx _write_message.

build_tpc_switch_payload_with_seq

Full-XA transaction-switch payload (func 103), used by tpc_begin (operation = TNS_TPC_TXN_START) and tpc_end (operation = TNS_TPC_TXN_DETACH). Unlike build_tpc_txn_switch_payload_with_seq (the sessionless special case) this carries a real format_id, a non-empty branch qualifier, and the captured transaction context to echo back. Reference messages/tpc_switch.pyx _write_message.

build_tpc_txn_switch_payload_with_seq

Direct (non-deferred) transaction-switch function call used to begin/resume (TNS_TPC_TXN_START + new/resume flag, with xid) or suspend (TNS_TPC_TXN_DETACH, no xid) a sessionless transaction. Reference impl/thin/connection.pyx begin/resume/suspend_sessionless_transaction.

check_fetch_conversion

Mirrors the reference fetch-conversion legality matrix (reference impl/base/var.pyx:113-248 _check_fetch_conversion). Given the metadata of the column being fetched and the Oracle type requested by an output type handler variable, returns the metadata that should be used for the wire define. Conversions that only affect the Python materialization keep the original wire metadata; LOB and JSON sources adjust the define so the server sends inline data. Unsupported pairs return None and the caller is expected to raise DPY-4007.

check_notification_header

Consume the leading TNS_MSG_TYPE_OAC byte that precedes the OAC record stream (process() reads it once before delivering any record). Returns the number of bytes consumed (1) or an error if the byte is not OAC.

collection_flags_for

Collection flags byte written at the start of a collection body (TNS_OBJ_HAS_INDEXES for associative arrays, else 0). Reference _parse_tds collection_flags + _pack_data.

column_metadata_is_xmltype

cursor_bind_template

dbobject_attr_max_size

dbobject_attr_precision_scale

dbobject_element_bind_type_info

dbobject_rowtype_attr_max_size

decode_bfile_locator_name

decode_datetime_value

decode_dbobject_binary_double

decode_dbobject_binary_float

decode_dbobject_text

decode_dbobject_xmltype_text

decode_lob_text

decode_number_text_into

Decode the Oracle NUMBER wire form into canonical decimal text, appending to text and returning whether the value is integral. digits is a caller-owned scratch buffer (cleared on entry) so a tight decode loop can reuse one allocation across many values — this is the allocation-free core the borrowed fetch path drives, writing straight into its per-row arena. decode_number_value is the owning convenience wrapper.

decode_number_value

decode_sessionless_txn_state

Decode the sessionless state bits packed in the transaction-id key/value binary payload (reference _update_sessionless_txn_state). The last two bytes are the state mask and the sync version; the leading bytes are the transaction id itself.

define_metadata_from_bind

encode_lob_text

encode_number_text

Encode a canonical decimal value into the Oracle NUMBER wire form (the inverse of decode_number_value). Public so benches / parity harnesses can synthesize fetch payloads. Reference impl/base/encoders.pyx.

image_begin

Builds the pickle image header (reference write_header + image_flags from create_new_object). Returns the buffer pre-seeded with the header; the caller appends the body and then calls image_finalize to back-patch the total size (4-byte BE at offset 3).

image_finalize

Back-patches the total image size (reference _get_packed_data: the 4-byte BE size at offset 3, after flags + version + 0xFE).

image_write_length

Writes a collection/element count length into a pickle image buffer using the 245-cutoff scheme (reference DbObjectPickleBuffer.write_length).

image_write_null

Writes a NULL element/attribute marker into the image. Non-collection object attributes use TNS_OBJ_ATOMIC_NULL (253); scalars and collection elements use TNS_NULL_LENGTH_INDICATOR (255). Reference _pack_value None branch.

image_write_value_bytes

Writes a length-prefixed value into a DbObject pickle image buffer using the inner-buffer scheme (252 short cutoff, 32767 chunks for the long form). This mirrors Buffer.write_bytes_with_length used by _pack_value (reference impl/thin/packet.pyx) — NOT the 245-cutoff write_length.

is_cursor_bind_template

lob_locator_is_temporary

output_bind

pack_bindvalue_into_image

Packs a single scalar BindValue into a DbObject pickle image buffer, mirroring _pack_value (reference impl/thin/dbobject.pyx:247-306). Object (nested) and Null/Array values are handled by the caller (the pyshim owns the recursion and null framing); this serves scalar attributes and collection elements only.

parse_accept_payload

parse_auth_response

parse_fetch_response_with_context

parse_lob_create_temp_response

parse_lob_free_temp_response

parse_lob_read_response

parse_lob_trim_response

parse_lob_write_response

parse_notification_stream

Decode every OAC record in a notification stream. The reference reads one leading message_type byte (TNS_MSG_TYPE_OAC) then loops _process_oac until end_of_response; the driver chains network packets into payload so this operates on the full concatenated TTC stream.

parse_oac_record

Decode a single OAC record. Ports notification.pyx::_process_oac plus the inner payload decode.

parse_plain_function_response

Scan a plain function response (ping/commit/rollback) for a server error. Unknown message types end the scan without error so payload shapes that were previously tolerated (responses used to go unparsed) keep working. Returns whether a server-side transaction is in progress, sampled from the final end-of-call status bit (reference protocol.pyx _process_call_status).

parse_query_response

parse_query_response_borrowed

Walk a fetch/query response payload and produce a BorrowedFetchResult whose rows borrow payload (the caller must keep the owned buffer alive — BorrowedRowBatch owns it). This is the zero-copy companion to parse_fetch_response_with_context: it walks the exact same message framing (DESCRIBE_INFO / ROW_HEADER / BIT_VECTOR / ROW_DATA / ERROR / END_OF_RESPONSE) but, instead of materializing owned rows, records each row’s byte offset and bit vector so BorrowedRowBatch::for_each_row_ref can decode them lazily and without per-cell allocation.

parse_query_response_with_binds

parse_query_response_with_binds_and_options

parse_query_response_with_binds_options_and_columns

known_columns carries the fetch metadata of a re-executed statement whose response does not repeat the describe information (reference keeps the statement’s fetch vars across executions).

parse_query_response_with_context

parse_query_response_with_previous

parse_subscribe_response

Decode the SUBSCRIBE (register) response. Ports subscribe.pyx::_process_return_parameters, dispatched on the TNS_MSG_TYPE_PARAMETER message inside the standard function response loop.

parse_tpc_change_state_response

Parse a TPC change-state response (reference tpc_change_state.pyx _process_return_parameters plus the base.pyx message loop). Reads the out state from the PARAMETER message and the txn-in-progress bit from the last call status. Server errors are surfaced as ProtocolError.

parse_tpc_switch_response

Parse a full-XA transaction-switch response (reference tpc_switch.pyx _process_return_parameters plus the base.pyx message loop). Captures the returned transaction context (PARAMETER message) and the txn-in-progress bit (last call status). Server errors are surfaced as ProtocolError.

parse_tpc_txn_switch_response

Parse a transaction-switch response (reference tpc_switch.pyx _process_return_parameters plus base.pyx message loop). Returns any sessionless state update carried by a transaction-id key/value pair; server errors (e.g. ORA-25351 / ORA-26217) are surfaced as ProtocolError.

public_dbtype_name_from_bind

public_dbtype_name_from_column_metadata

public_dbtype_name_from_oracle_type_name

public_dbtype_name_from_type_name

public_dbtype_size_info

Mirrors the reference DbType.default_size / _buffer_size_factor table (reference impl/base/types.pyx:120-440). Returns (default_size, buffer_size_factor) for a public database type name.

returning_output_bind

try_parse_oac_record

Attempt to decode exactly one OAC record from the front of bytes. Returns the decoded record and the number of bytes consumed, or Ok(None) when the buffer does not yet hold a complete record (the caller must read more data from the EMON socket and retry — mirroring the reference ReadBuffer chaining packets within a single process() call).

write_dbobject_bind

Frames a fully-packed DbObject pickle image into the outgoing data row, replacing the zero stub used for empty OUT binds. Mirrors WriteBuffer.write_dbobject (reference impl/thin/packet.pyx:842-857). The toid is derived from the type oid per create_new_object (620-622).