mongod实例的写操作命令(增、删、改)由write_commands.cpp文件实现,该文件中的CmdInsert、CmdDelete、CmdUpdate类分别对应具体的增、删、改命令操作。读操作命令由find_cmd.cpp文件实现,对应命令类为FindCmd 除了mongod实例,mongos作为代理转发节点,同样支持增、删、改操作。mongodb内核实现的时候,如果集群部署是shard...
if (!retval) { 31. command->incrementCommandsFailed(); 32. } 33. ... 34.} execCommandDatabase(...)最终调用RunCommandImpl(...)进行对应命令的真正处理,该接口核心代码实现如下: 1.bool runCommandImpl(...) { 2. //获取命令请求内容body 3. BSONObj cmd = request.body; 4. //获取请求中的...
db.listCommands() lists all the db commands 27. db.printCollectionStats() 28. db.printReplicationInfo() 29. db.printSlaveReplicationInfo() 30. db.printShardingStatus() 31. db.removeUser(username) 32. db.repairDatabase() 33. db.resetError() 34. db.runCommand(cmdObj) run a database co...
16. directory 17. -d [ --db ] arg database to use 18. -c [ --collection ] arg collection to use (some commands) 19. -f [ --fields ] arg comma separated list of field names e.g. -f name,age 20. --fieldFile arg file with fields names - 1 per line 21. --ignoreBlanks i...
killOp(opid) kills the current operation in the db db.listCommands() lists all the db commands db.loadServerScripts() loads all the scripts in db.system.js db.logout() db.printCollectionStats() db.printReplicationInfo() db.printShardingStatus() db.printSlaveReplicationInfo() db.dropUser(...
killOp(opid) kills the current operation in the db26db.listCommands() lists all the db commands27db.printCollectionStats()28db.printReplicationInfo()29db.printSlaveReplicationInfo()30db.printShardingStatus()31db.removeUser(username)32db.repairDatabase()33db.resetError()34db.runCommand(cmdObj) ...
listCommands() lists all the db commands db.loadServerScripts() loads all the myscripts in db.system.js db.logout() db.printCollectionStats() db.printReplicationInfo() db.printShardingStatus() db.printSlaveReplicationInfo() db.resetError() db.runCommand(cmdObj) run a database command. if...
db.killOp(opid) kills the current operation in the db db.listCommands() lists all the db commands db.loadServerScripts() loads all the scripts in db.system.js db.logout() db.printCollectionStats() db.printReplicationInfo() db.printShardingStatus() ...
opWorkingTime.commands opWorkingTime.reads opWorkingTime.writes opWorkingTime.transactions planCache.classic.replanned planCache.sbe.replanned 排序选项 从MongoDB 8.0 开始,updateOne()、replaceOne()和update有一个可选的sort字段,用于在应用更新之前对文档进行排序。
We’ve already seen a couple of commands in the previous chapters; for instance, we used the getLastError command in Chapter 3 to check the number of documents affected by an update: > db.count.update({x : 1}, {$inc : {x : 1}}, false, true) > db.runCommand({getLastError : 1}...