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# Copyright (C) 2018-present MongoDB, Inc.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the Server Side Public License, version 1,
# as published by MongoDB, Inc.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# Server Side Public License for more details.
#
# You should have received a copy of the Server Side Public License
# along with this program. If not, see
# <http://www.mongodb.com/licensing/server-side-public-license>.
#
# As a special exception, the copyright holders give permission to link the
# code of portions of this program with the OpenSSL library under certain
# conditions as described in each individual source file and distribute
# linked combinations including the program with the OpenSSL library. You
# must comply with the Server Side Public License in all respects for
# all of the code used other than as permitted herein. If you modify file(s)
# with this exception, you may extend this exception to your version of the
# file(s), but you are not obligated to do so. If you do not wish to do so,
# delete this exception statement from your version. If you delete this
# exception statement from all source files in the program, then also delete
# it in the license file.
#
# Oplog Entry IDL File
global:
cpp_namespace: "mongo::repl"
imports:
- "mongo/idl/basic_types.idl"
- "mongo/db/logical_session_id.idl"
- "mongo/db/pipeline/value.idl"
- "mongo/db/repl/optime_base.idl"
- "mongo/db/repl/replication_types.idl"
- "mongo/s/sharding_types.idl"
enums:
OpType:
description: "The type of an operation in the oplog"
type: string
values:
kCommand: "c"
kInsert: "i"
kUpdate: "u"
kDelete: "d"
kNoop: "n"
RetryImage:
description: "Dictates whether a pre-image or post-image is to be stored on behalf of this
retryable write."
type: string
values:
kPreImage: "preImage"
kPostImage: "postImage"
structs:
DurableReplOperation:
description: "A document that represents an operation in a transaction. Should never be
used directly in server code. Instead, create an instance of ReplOperation."
fields:
op:
cpp_name: opType
type: OpType
description: "The operation type"
ns:
cpp_name: nss
type: namespacestring
description: "The namespace on which to apply the operation"
ui:
cpp_name: uuid
type: uuid
optional: true
description: "The UUID of the collection"
o:
cpp_name: object
type: object
description: "The operation applied"
o2:
cpp_name: object2
type: object
optional: true
description: "Additional information about the operation applied"
b:
cpp_name: upsert
type: bool
optional: true
description: "If true, treats this update operation as an upsert.
Used when extracting individual update oplog entries from the oplog
entry of an applyOps command that was executed with alwaysUpsert true
(the default). Originally added for backwards compatibility with
updates from 3.6 and before."
preImageOpTime:
type: optime
optional: true
description: "The optime of another oplog entry that contains the document
before an update/remove was applied."
destinedRecipient:
cpp_name: destinedRecipient
type: shard_id
optional: true
description: "The destined recipient for this op under the new shard key pattern.
Only included when a resharding operation is in progress."
OplogEntryBase:
description: A document in which the server stores an oplog entry.
inline_chained_structs: true
chained_structs:
OperationSessionInfo: OperationSessionInfo
DurableReplOperation: DurableReplOperation
OpTimeBase: OpTimeBase
fields:
h:
cpp_name: hash
type: long
optional: true # Only used for backwards compatibility with 4.0 and before.
description: "The hash of the oplog entry"
v:
cpp_name: version
type: safeInt64
default: 2
description: "The version of the oplog"
wall:
cpp_name: wallClockTime
type: date
description: "A wallclock time with MS resolution"
fromMigrate:
type: bool
optional: true
description: "An operation caused by a chunk migration"
fromTenantMigration:
type: uuid
optional: true
description: "Contains the UUID of a tenant migration for an operation caused by
one."
_id:
cpp_name: _id
type: Value
optional: true
description: "Used by tests in replication and also by production resharding code to
store timestamps."
stmtId:
cpp_name: statementIds
type:
variant: [StmtId, array<StmtId>]
optional: true
description: "Identifier of the transaction statement(s) which generated this oplog
entry"
prevOpTime:
cpp_name: prevWriteOpTimeInTransaction
type: optime
optional: true # Only for writes that are part of a transaction
description: "The opTime of the previous write with the same transaction."
postImageOpTime:
type: optime
optional: true
description: "The optime of another oplog entry that contains the document
after an update was applied."
needsRetryImage:
type: RetryImage
optional: true
description: "Identifies whether a secondary should store a pre-image or post-image
associated with this oplog entry."
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