Header
Common Preamble:
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The following ~Opcodes~ have been defined:
~Opcode Name Value Comment~
OP_REPLY 1 Reply to a client request. responseTo is set.
OP_UPDATE 2001 Update document.
OP_INSERT 2002 Insert new document.
RESERVED 2003 Formerly used for OP_GET_BY_OID.
OP_QUERY 2004 Query a collection.
OP_GET_MORE 2005 Get more data from a query. See Cursors.
OP_DELETE 2006 Delete documents.
OP_KILL_CURSORS 2007 Notify database that the client has finished with the cursor.
OP_COMMAND 2010 Cluster internal protocol representing a command request.
OP_COMMANDREPLY 2011 Cluster internal protocol representing a reply to an OP_COMMAND.
OP_MSG 2013 Send a message using the format introduced in MongoDB 3.6.
~Opcode Name Value Comment~
*OP_REPLY 1 Reply to a client request. responseTo is set.*
|999999|OP_UPDATE 2001 Update document.|
|999999|OP_INSERT 2002 Insert new document.|
|999999|RESERVED 2003 Formerly used for OP_GET_BY_OID.|
*OP_QUERY 2004 Query a collection.*
|999999|OP_GET_MORE 2005 Get more data from a query. See Cursors.|
|999999|OP_DELETE 2006 Delete documents.|
|999999|OP_KILL_CURSORS 2007 Notify database that the client has finished with the cursor.|
|999999|OP_COMMAND 2010 Cluster internal protocol representing a command request.|
|999999|OP_COMMANDREPLY 2011 Cluster internal protocol representing a reply to an OP_COMMAND.|
*OP_MSG 2013 Send a message using the format introduced in MongoDB 3.6.*
Only a few are used in MongoDB 4.0