MongoDB: db.listCommands() method
db.listCommands
The db.listCommands() method is used to display a list of common database commands.
Syntax:
db.listCommands()
Example: MongoDB: db.listCommands() method
db.listCommands();
Output:
> db.listCommands();
_isSelf:
{ _isSelf : 1 } INTERNAL ONLY
_mergeAuthzCollections: adminOnly slaveOk
Internal command used by mongorestore for updating user/role data
_migrateClone: adminOnly slaveOk
internal
_recvChunkAbort: adminOnly slaveOk
internal
_recvChunkCommit: adminOnly slaveOk
internal
_recvChunkStart: adminOnly slaveOk
internal
_recvChunkStatus: adminOnly slaveOk
internal
_transferMods: adminOnly slaveOk
internal
aggregate:
{ pipeline: [ { $operator: {...}}, ... ], explain: <bool>, allowDiskUse: <bool>, cursor: {batchSize: <number>} }
See http://dochub.mongodb.org/core/aggregation for more details.
appendOplogNote: adminOnly slaveOk
Adds a no-op entry to the oplog
applyOps:
internal (sharding)
{ applyOps : [ ] , preCondition : [ { ns : ... , q : ... , res : ... } ] }
authSchemaUpgrade: adminOnly slaveOk
Upgrades the auth data storage schema
authenticate:
internal
availableQueryOptions:
no help defined
buildInfo:
get version #, etc.
{ buildinfo:1 }
checkShardingIndex:
Internal command.
cleanupOrphaned: adminOnly slaveOk
no help defined
clone:
clone this database from an instance of the db on another host
{ clone : "host13" }
cloneCollection:
{ cloneCollection: <collection>, from: <host> [,query: <query_filter>] [,copyIndexes:<bool>] }
Copies a collection from one server to another. Do not use on a single server as the destination is placed at the same db.collection (namespace) as the source.
cloneCollectionAsCapped:
{ cloneCollectionAsCapped:<fromName>, toCollection:<toName>, size:<sizeInBytes> }
closeAllDatabases: adminOnly slaveOk
Close all database files.
A new request will cause an immediate reopening; thus, this is mostly for testing purposes.
collMod:
Sets collection options.
Example: { collMod: 'foo', usePowerOf2Sizes:true }
Example: { collMod: 'foo', index: {keyPattern: {a: 1}, expireAfterSeconds: 600} }
collStats:
{ collStats:"blog.posts" , scale : 1 } scale divides sizes e.g. for KB use 1024
avgObjSize - in bytes
compact:
compact collection
warning: this operation locks the database and is slow. you can cancel with killOp()
{ compact : <collection_name>, [force:<bool>], [validate:<bool>],
[paddingFactor:<num>], [paddingBytes:<num>] }
force - allows to run on a replica set primary
validate - check records are noncorrupt before adding to newly compacting extents. slower but safer (defaults to true in this version)
connPoolStats:
stats about connection pool
connPoolSync:
internal
connectionStatus:
Returns connection-specific information such as logged-in users
convertToCapped:
{ convertToCapped:<fromCollectionName>, size:<sizeInBytes> }
copydb: adminOnly slaveOk
copy a database from another host to this host
usage: {copydb: 1, fromhost: <connection string>, fromdb: <db>, todb: <db>[, slaveOk: <bool>, username: <username>, nonce: <nonce>, key: <key>]}
copydbgetnonce: adminOnly slaveOk
get a nonce for subsequent copy db request from secure server
usage: {copydbgetnonce: 1, fromhost: <hostname>}
count:
count objects in collection
create:
create a collection explicitly
{ create: <ns>[, capped: <bool>, size: <collSizeInBytes>, max: <nDocs>] }
createIndexes:
no help defined
createRole:
Adds a role to the system
createUser:
Adds a user to the system
cursorInfo:
example: { cursorInfo : 1 }, deprecated
dataSize:
determine data size for a set of data in a certain range
example: { dataSize:"blog.posts", keyPattern:{x:1}, min:{x:10}, max:{x:55} }
min and max parameters are optional. They must either both be included or both omitted
keyPattern is an optional parameter indicating an index pattern that would be usefulfor iterating over the min/max bounds. If keyPattern is omitted, it is inferred from the structure of min.
note: This command may take a while to run
dbHash:
no help defined
dbStats:
Get stats on a database. Not instantaneous. Slower for databases with large .ns files.
Example: { dbStats:1, scale:1 }
delete:
delete documents
diagLogging: adminOnly slaveOk
http://dochub.mongodb.org/core/monitoring#MonitoringandDiagnostics-DatabaseRecord%2FReplay%28diagLoggingcommand%29
distinct:
{ distinct : 'collection name' , key : 'a.b' , query : {} }
driverOIDTest:
no help defined
drop:
drop a collection
{drop : <collectionName>}
dropAllRolesFromDatabase:
Drops all roles from the given database. Before deleting the roles completely it must remove them from any users or other roles that reference them. If any errors occur in the middle of that process it's possible to be left in a state where the roles have been removed from some user/roles but ot
herwise still exist.
dropAllUsersFromDatabase:
Drops all users for a single database.
dropDatabase:
drop (delete) this database
dropIndexes:
drop indexes for a collection
dropRole:
Drops a single role. Before deleting the role completely it must remove it from any users or roles that reference it. If any errors occur in the middle of that process it's possible to be left in a state where the role has been removed from some user/roles but otherwise still exists.
dropUser:
Drops a single user.
eval:
Evaluate javascript at the server.
http://dochub.mongodb.org/core/serversidecodeexecution
features:
return build level feature settings
filemd5:
example: { filemd5 : ObjectId(aaaaaaa) , root : "fs" }
findAndModify:
{ findAndModify: "collection", query: {processed:false}, update: {$set: {processed:true}}, new: true}
{ findAndModify: "collection", query: {processed:false}, remove: true, sort: {priority:-1}}
Either update or remove is required, all other fields have default values.
Output is in the "value" field
forceerror:
for testing purposes only. forces a user assertion exception
fsync: adminOnly slaveOk
http://dochub.mongodb.org/core/fsynccommand
geoNear:
http://dochub.mongodb.org/core/geo#GeospatialIndexing-geoNearCommand
geoSearch:
no help defined
getCmdLineOpts: adminOnly slaveOk
get argv
getLastError:
return error status of the last operation on this connection
options:
{ fsync:true } - fsync before returning, or wait for journal commit if running with --journal
{ j:true } - wait for journal commit if running with --journal
{ w:n } - await replication to n servers (including self) before returning
{ w:'majority' } - await replication to majority of set
{ wtimeout:m} - timeout for w in m milliseconds
getLog: adminOnly slaveOk
{ getLog : '*' } OR { getLog : 'global' }
getParameter: adminOnly slaveOk
get administrative option(s)
example:
{ getParameter:1, notablescan:1 }
supported:
_forceLegacyShardWriteMode
authSchemaVersion
clusterAuthMode
connPoolMaxConnsPerHost
connPoolMaxShardedConnsPerHost
enableLocalhostAuthBypass
enableTestCommands
failIndexKeyTooLong
internalQueryCacheFeedbacksStored
internalQueryCacheSize
internalQueryCacheStdDeviations
internalQueryCacheWriteOpsBetweenFlush
internalQueryEnumerationMaxIntersectPerAnd
internalQueryEnumerationMaxOrSolutions
internalQueryForceIntersectionPlans
internalQueryMaxScansToExplode
internalQueryPlanEvaluationCollFraction
internalQueryPlanEvaluationMaxResults
internalQueryPlanEvaluationWorks
internalQueryPlanOrChildrenIndependently
internalQueryPlannerEnableHashIntersection
internalQueryPlannerEnableIndexIntersection
internalQueryPlannerMaxIndexedSolutions
internalSCCAllowFastestAuthConfigReads
internalSCCAllowFastestMetadataConfigReads
logLevel
logUserIds
maxSyncSourceLagSecs
newCollectionsUsePowerOf2Sizes
notablescan
queueForMigrationCommit
quiet
releaseConnectionsAfterResponse
replApplyBatchSize
replIndexPrefetch
sslMode
supportCompatibilityFormPrivilegeDocuments
syncdelay
textSearchEnabled
ttlMonitorEnabled
verboseQueryLogging
{ getParameter:'*' } to get everything
getPrevError:
check for errors since last reseterror commandcal
getShardMap: adminOnly slaveOk
internal
getShardVersion: adminOnly slaveOk
example: { getShardVersion : 'alleyinsider.foo' }
getnonce:
internal
getoptime:
internal
grantPrivilegesToRole:
Grants privileges to a role
grantRolesToRole:
Grants roles to another role.
grantRolesToUser:
Grants roles to a user.
group:
http://dochub.mongodb.org/core/aggregation
handshake:
internal
hostInfo:
returns information about the daemon's host
insert:
insert documents
invalidateUserCache:
Invalidates the in-memory cache of user information
isMaster:
Check if this server is primary for a replica pair/set; also if it is --master or --slave in simple master/slave setups.
{ isMaster : 1 }
listCommands:
get a list of all db commands
listDatabases: adminOnly slaveOk
list databases on this server
logRotate: adminOnly slaveOk
no help defined
logout:
de-authenticate
mapReduce:
Run a map/reduce operation on the server.
Note this is used for aggregation, not querying, in MongoDB.
http://dochub.mongodb.org/core/mapreduce
mapreduce.shardedfinish:
internal
medianKey:
Deprecated internal command. Use splitVector command instead.
mergeChunks: adminOnly slaveOk
Merge Chunks command
usage: { mergeChunks : <ns>, bounds : [ <min key>, <max key> ], (opt) epoch : <epoch>, (opt) config : <configdb string>, (opt) shardName : <shard name> }
moveChunk: adminOnly slaveOk
should not be calling this directly
parallelCollectionScan:
no help defined
ping:
a way to check that the server is alive. responds immediately even if server is in a db lock.
planCacheClear:
Drops one or all cached queries in a collection.
planCacheClearFilters:
Clears index filter for a single query shape or, if the query shape is omitted, all filters for the collection.
planCacheListFilters:
Displays index filters for all query shapes in a collection.
planCacheListPlans:
Displays the cached plans for a query shape.
planCacheListQueryShapes:
Displays all query shapes in a collection.
planCacheSetFilter:
Sets index filter for a query shape. Overrides existing filter.
profile:
enable or disable performance profiling
{ profile : <n> }
0=off 1=log slow ops 2=log all
-1 to get current values
http://dochub.mongodb.org/core/databaseprofiler
reIndex:
re-index a collection
renameCollection: adminOnly slaveOk
example: { renameCollection: foo.a, to: bar.b }
repairDatabase:
repair database. also compacts. note: slow.
replSetElect: adminOnly slaveOk
internal
replSetFreeze: adminOnly slaveOk
{ replSetFreeze : <seconds> }'freeze' state of member to the extent we can do that. What this really means is that
this node will not attempt to become primary until the time period specified expires.
You can call again with {replSetFreeze:0} to unfreeze sooner.
A process restart unfreezes the member also.
http://dochub.mongodb.org/core/replicasetcommands
replSetFresh: adminOnly slaveOk
internal
replSetGetRBID: adminOnly slaveOk
internal
replSetGetStatus: adminOnly slaveOk
Report status of a replica set from the POV of this server
{ replSetGetStatus : 1 }
http://dochub.mongodb.org/core/replicasetcommands
replSetHeartbeat: adminOnly slaveOk
internal
replSetInitiate: adminOnly slaveOk
Initiate/christen a replica set.
http://dochub.mongodb.org/core/replicasetcommands
replSetMaintenance: adminOnly slaveOk
{ replSetMaintenance : bool }
Enable or disable maintenance mode.
replSetReconfig: adminOnly slaveOk
Adjust configuration of a replica set
{ replSetReconfig : config_object }
http://dochub.mongodb.org/core/replicasetcommands
replSetStepDown: adminOnly slaveOk
{ replSetStepDown : <seconds> }
Step down as primary. Will not try to reelect self for the specified time period (1 minute if no numeric secs value specified).
(If another member with same priority takes over in the meantime, it will stay primary.)
http://dochub.mongodb.org/core/replicasetcommands
replSetSyncFrom: adminOnly slaveOk
{ replSetSyncFrom : "host:port" }
Change who this member is syncing from.
replSetUpdatePosition: adminOnly slaveOk
internal
resetError:
reset error state (used with getpreverror)
resync: adminOnly slaveOk
resync (from scratch) a stale slave or replica set secondary node.
revokePrivilegesFromRole:
Revokes privileges from a role
revokeRolesFromRole:
Revokes roles from another role.
revokeRolesFromUser:
Revokes roles from a user.
rolesInfo:
Returns information about roles.
serverStatus:
returns lots of administrative server statistics
setParameter: adminOnly slaveOk
set administrative option(s)
{ setParameter:1, <param>:<value> }
supported:
_forceLegacyShardWriteMode
authSchemaVersion
clusterAuthMode
connPoolMaxConnsPerHost
connPoolMaxShardedConnsPerHost
enableLocalhostAuthBypass
enableTestCommands
failIndexKeyTooLong
internalQueryCacheFeedbacksStored
internalQueryCacheSize
internalQueryCacheStdDeviations
internalQueryCacheWriteOpsBetweenFlush
internalQueryEnumerationMaxIntersectPerAnd
internalQueryEnumerationMaxOrSolutions
internalQueryForceIntersectionPlans
internalQueryMaxScansToExplode
internalQueryPlanEvaluationCollFraction
internalQueryPlanEvaluationMaxResults
internalQueryPlanEvaluationWorks
internalQueryPlanOrChildrenIndependently
internalQueryPlannerEnableHashIntersection
internalQueryPlannerEnableIndexIntersection
internalQueryPlannerMaxIndexedSolutions
internalSCCAllowFastestAuthConfigReads
internalSCCAllowFastestMetadataConfigReads
logLevel
logUserIds
maxSyncSourceLagSecs
newCollectionsUsePowerOf2Sizes
notablescan
queueForMigrationCommit
quiet
releaseConnectionsAfterResponse
replApplyBatchSize
replIndexPrefetch
sslMode
supportCompatibilityFormPrivilegeDocuments
syncdelay
textSearchEnabled
ttlMonitorEnabled
verboseQueryLogging
setShardVersion: adminOnly slaveOk
internal
shardConnPoolStats:
stats about the shard connection pool
shardingState: adminOnly slaveOk
no help defined
shutdown: adminOnly slaveOk
shutdown the database. must be ran against admin db and either (1) ran from localhost or (2) authenticated. If this is a primary in a replica set and there is no member within 10 seconds of its optime, it will not shutdown without force : true. You can also specify timeoutSecs : N to wait N seco
nds for other members to catch up.
splitChunk: adminOnly slaveOk
internal command usage only
example:
{ splitChunk:"db.foo" , keyPattern: {a:1} , min : {a:100} , max: {a:200} { splitKeys : [ {a:150} , ... ]}
splitVector:
Internal command.
examples:
{ splitVector : "blog.post" , keyPattern:{x:1} , min:{x:10} , max:{x:20}, maxChunkSize:200 }
maxChunkSize unit in MBs
May optionally specify 'maxSplitPoints' and 'maxChunkObjects' to avoid traversing the whole chunk
{ splitVector : "blog.post" , keyPattern:{x:1} , min:{x:10} , max:{x:20}, force: true }
'force' will produce one split point even if data is small; defaults to false
NOTE: This command may take a while to run
stageDebug:
text:
no help defined
top: adminOnly slaveOk
usage by collection, in micros
touch:
touch collection
Page in all pages of memory containing every extent for the given collection
{ touch : <collection_name>, [data : true] , [index : true] }
at least one of data or index must be true; default is both are false
unsetSharding: adminOnly slaveOk
internal
update:
update documents
updateRole:
Used to update a role
updateUser:
Used to update a user, for example to change its password
usersInfo:
Returns information about users.
validate:
Validate contents of a namespace by scanning its data structures for correctness. Slow.
Add full:true option to do a more thorough check
whatsmyuri:
{whatsmyuri:1}
writeBacksQueued: adminOnly slaveOk
internal
writebacklisten: adminOnly slaveOk
internal
Retrieve the restaurants data from here
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db.isMaster() method
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db.logout() method
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