DBCC - Undocumented commands

Posted 2020-12-29

?????????pex   latch   undo   buffers   cache   timeout   debug   ror   collect   

These commands may affect system performance and/or force table-level locks.There is no guarantee these commands will remain available in any future release of SQL server.

DBCC activecursors [(spid)]

DBCC addextendedproc (function_name, dll_name)

DBCC addinstance (objectname, instancename)

DBCC adduserobject (name)

DBCC auditevent (eventclass, eventsubclass, success, loginname, rolename, dbusername, loginid)

DBCC autopilot (typeid, dbid, tabid, indid, pages [,flag])

DBCC balancefactor (variance_percent)

DBCC bufcount [(number_of_buffers)]

DBCC buffer ( {???dbname??? | dbid} [, objid [, number [, printopt={0|1|2} ] [, dirty | io | kept | rlock | ioerr | hashed ]]]) 

DBCC bytes ( startaddress, length )

DBCC cachestats

DBCC callfulltext

DBCC checkdbts (dbid, newTimestamp)]

DBCC checkprimaryfile ( {???FileName???} [, opt={0|1|2|3} ])

DBCC cacheprofile [( {actionid} [, bucketid])

DBCC clearspacecaches (???database_name???|database_id, ???table_name???|table_id, ???index_name???|index_id)

DBCC collectstats (on | off)

DBCC config

DBCC cursorstats ([spid [,???clear???]])

DBCC dbinfo [(???dbname???)]

DBCC dbrecover (dbname [, IgnoreErrors])

DBCC dbreindexall (db_name/db_id, type_bitmap)

DBCC dbrepair (???dbname???, DROPDB [, NOINIT])

DBCC dbtable [({???dbname??? | dbid})]

DBCC debugbreak

DBCC deleteinstance (objectname, instancename)

DBCC des [( {???dbname??? | dbid} [, {???objname??? | objid} ])]

DBCC detachdb [( ???dbname??? )]

DBCC dropextendedproc (function_name)

DBCC dropuserobject (???object_name???)

DBCC dumptrigger ({???BREAK???, {0 | 1}} | ???DISPLAY??? | {???SET???, exception_number} | {???CLEAR???, exception_number})

DBCC errorlog

DBCC extentinfo [({???database_name???| dbid | 0} [,{???table_name??? | table_id} [, {???index_name??? | index_id | -1}]])]

DBCC fileheader [( {???dbname??? | dbid} [, fileid])

DBCC fixallocation [({???ADD??? | ???REMOVE???}, {???PAGE??? | ???SINGLEPAGE??? | ???EXTENT??? | ???MIXEDEXTENT???} , filenum, pagenum [, objectid, indid])

DBCC flush (???data??? | ???log???, dbid)

DBCC flushprocindb (database)

DBCC freeze_io (db)

DBCC getvalue (name)

DBCC icecapquery (???dbname???, stored_proc_name [, #_times_to_icecap (-1 infinite, 0 turns off)])
Use ???dbcc icecapquery (printlist)??? to see list of SP???s to profile.
Use ???dbcc icecapquery (icecapall)??? to profile all SP???s.

DBCC incrementinstance (objectname, countername, instancename, value)

DBCC ind ( { ???dbname??? | dbid }, { ???objname??? | objid }, { indid | 0 | -1 | -2 } )

DBCC invalidate_textptr (textptr)

DBCC invalidate_textptr_objid (objid)

DBCC iotrace ( { ???dbname??? | dbid | 0 | -1 } , { fileid | 0 }, bufsize, [ { numios | -1 } [, { timeout (sec) | -1 } [, printopt={ 0 | 1 }]]] )

DBCC latch ( address [, ???owners???] [, ???stackdumps???])

DBCC lock ([{???DUMPTABLE??? | ???DUMPSTATS??? | ???RESETSTATS??? | ???HASH???}] | [{???STALLREPORTTHESHOLD???, stallthreshold}])

DBCC lockobjectschema (???object_name???)

DBCC log ([dbid[,{0|1|2|3|4}[,[???lsn???,???[0x]x:y:z???]|[???numrecs???,num]|[???xdesid???,???x:y???] | [???extent???,???x:y???]|[???pageid???,???x:y???]|[???objid???,{x,???y???}]|[???logrecs???, {???lop???|op}...]|[???output???,x,[???filename???,???x???]]...]]])

DBCC loginfo [({???database_name??? | dbid})]

DBCC matview ({???PERSIST??? | ???ENDPERSIST??? | ???FREE??? | ???USE??? | ???ENDUSE???})

DBCC memobjlist [(memory object)]

DBCC memorymap

DBCC memorystatus

DBCC memospy

DBCC memusage ([IDS | NAMES], [Number of rows to output])

DBCC monitorevents (???sink??? [, ???filter-expression???])

DBCC newalloc - please use checkalloc instead

DBCC no_textptr (table_id , max_inline)

DBCC page ( {???dbname??? | dbid}, filenum, pagenum [, printopt={0|1|2|3} ][, cache={0|1} ])

DBCC perflog

DBCC perfmon

DBCC pglinkage (dbid, startfile, startpg, number, printopt={0|1|2} , targetfile, targetpg, order={1|0})

DBCC procbuf [({???dbname??? | dbid}[, {???objname??? | objid} [, nbufs[, printopt = { 0 | 1 } ]]] )]

DBCC prtipage (dbid, objid, indexid [, [{{level, 0} | {filenum, pagenum}}] [,printopt]])

DBCC pss [(uid[, spid[, printopt = { 1 | 0 }]] )]

DBCC readpage ({ dbid, ???dbname??? }, fileid, pageid , formatstr [, printopt = { 0 | 1} ])

DBCC rebuild_log (dbname [, filename])

DBCC renamecolumn (object_name, old_name, new_name)

DBCC resource

DBCC row_lock (dbid, tableid, set) - Not Needed

DBCC ruleoff ({ rulenum | rulestring } [, { rulenum | rulestring } ]+)

DBCC ruleon ( rulenum | rulestring } [, { rulenum | rulestring } ]+)

DBCC setcpuweight (weight)

DBCC setinstance (objectname, countername, instancename, value)

DBCC setioweight (weight)

DBCC showdbaffinity

DBCC showfilestats [(file_num)]

DBCC showoffrules

DBCC showonrules

DBCC showtableaffinity (table)

DBCC showtext (???dbname???, {textpointer | {fileid, pageid, slotid[,option]}})

DBCC showweights

DBCC sqlmgrstats

DBCC stackdump [( {uid[, spid[, ecid]} | {threadId, ???THREADID???}] )]

DBCC tab ( dbid, objid )

DBCC tape_control {???query??? | ???release???}[,(???\. ape???)]

DBCC tec [( uid[, spid[, ecid]] )]

DBCC textall [({???database_name???|database_id}[, ???FULL??? | FAST] )]

DBCC textalloc ({???table_name???|table_id}[, ???FULL??? | FAST])

DBCC thaw_io (db)

DBCC upgradedb (db)

DBCC usagegovernor (command, value)

DBCC useplan [(number_of_plan)]

DBCC wakeup (spid)

DBCC writepage ({ dbid, ???dbname??? }, fileid, pageid, offset, length, data)

In early versions of SQL Server - DBCC stood for "Database Consistency Checker", now renamed as Database Console Command.

Related (current) commands:

DBCC CHECK... 
DBCC CLEANTABLE 
DBCC dllname 
DBCC DROPCLEANBUFFERS 
DBCC FREE... CACHE 
DBCC HELP 
DBCC INPUTBUFFER 
DBCC OPENTRAN 
DBCC OUTPUTBUFFER 
DBCC PROCCACHE 
DBCC SHOW_STATISTICS 
DBCC SHRINKDATABASE 
DBCC SHRINKFILE 
DBCC SQLPERF 
DBCC TRACE... 
DBCC UPDATEUSAGE 
DBCC USEROPTIONS