数据库系统升级，要注意很多东西，5.x版本升级到mysql8，是一次大的版本升级，因此要注意诸多事项.

charset更新

关键字

一些在5.x版本没有问题的字段，在mysql8中会触发关键字.
例如： rank，在mysql 8中就是关键字.
下面附录mysql 8中关键字.

AACCESSIBLE (R)ACCOUNTACTIONACTIVEADD (R)ADMINAFTERAGAINSTAGGREGATEALGORITHMALL (R)ALTER (R)ALWAYSANALYZE (R)AND (R)ANYARRAYAS (R)ASC (R)ASCIIASENSITIVE (R)ATATTRIBUTEAUTHENTICATIONAUTOEXTEND_SIZEAUTO_INCREMENTAVGAVG_ROW_LENGTHBBACKUPBEFORE (R)BEGINBETWEEN (R)BIGINT (R)BINARY (R)BINLOGBITBLOB (R)BLOCKBOOLBOOLEANBOTH (R)BTREEBUCKETSBULKBY (R)BYTECCACHECALL (R)CASCADE (R)CASCADEDCASE (R)CATALOG_NAMECHAINCHALLENGE_RESPONSECHANGE (R)CHANGEDCHANNELCHAR (R)CHARACTER (R)CHARSETCHECK (R)CHECKSUMCIPHERCLASS_ORIGINCLIENTCLONECLOSECOALESCECODECOLLATE (R)COLLATIONCOLUMN (R)COLUMNSCOLUMN_FORMATCOLUMN_NAMECOMMENTCOMMITCOMMITTEDCOMPACTCOMPLETIONCOMPONENTCOMPRESSEDCOMPRESSIONCONCURRENTCONDITION (R)CONNECTIONCONSISTENTCONSTRAINT (R)CONSTRAINT_CATALOGCONSTRAINT_NAMECONSTRAINT_SCHEMACONTAINSCONTEXTCONTINUE (R)CONVERT (R)CPUCREATE (R)CROSS (R)CUBE (R)CUME_DIST (R)CURRENTCURRENT_DATE (R)CURRENT_TIME (R)CURRENT_TIMESTAMP (R)CURRENT_USER (R)CURSOR (R)CURSOR_NAMEDDATADATABASE (R)DATABASES (R)DATAFILEDATEDATETIMEDAYDAY_HOUR (R)DAY_MICROSECOND (R)DAY_MINUTE (R)DAY_SECOND (R)DEALLOCATEDEC (R)DECIMAL (R)DECLARE (R)DEFAULT (R)DEFAULT_AUTHDEFINERDEFINITIONDELAYED (R)DELAY_KEY_WRITEDELETE (R)DENSE_RANK (R)DESC (R)DESCRIBE (R)DESCRIPTIONDETERMINISTIC (R)DIAGNOSTICSDIRECTORYDISABLEDISCARDDISKDISTINCT (R)DISTINCTROW (R)DIV (R)DODOUBLE (R)DROP (R)DUAL (R)DUMPFILEDUPLICATEDYNAMICEEACH (R)ELSE (R)ELSEIF (R)EMPTY (R)ENABLEENCLOSED (R)ENCRYPTIONENDENDSENFORCEDENGINEENGINESENGINE_ATTRIBUTEENUMERRORERRORSESCAPEESCAPED (R)EVENTEVENTSEVERYEXCEPT (R)EXCHANGEEXCLUDEEXECUTEEXISTS (R)EXIT (R)EXPANSIONEXPIREEXPLAIN (R)EXPORTEXTENDEDEXTENT_SIZEFFACTORFAILED_LOGIN_ATTEMPTSFALSE (R)FASTFAULTSFETCH (R)FIELDSFILEFILE_BLOCK_SIZEFILTERFINISHFIRSTFIRST_VALUE (R)FIXEDFLOAT (R)FLOAT4 (R)FLOAT8 (R)FLUSHFOLLOWINGFOLLOWSFOR (R)FORCE (R)FOREIGN (R)FORMATFOUNDFROM (R)FULLFULLTEXT (R)FUNCTION (R)GGENERALGENERATEGENERATED (R)GEOMCOLLECTIONGEOMETRYGEOMETRYCOLLECTIONGET (R)GET_FORMATGET_MASTER_PUBLIC_KEYGET_SOURCE_PUBLIC_KEYGLOBALGRANT (R)GRANTSGROUP (R)GROUPING (R)GROUPS (R)GROUP_REPLICATIONGTIDSGTID_ONLYHHANDLERHASHHAVING (R)HELPHIGH_PRIORITY (R)HISTOGRAMHISTORYHOSTHOSTSHOURHOUR_MICROSECOND (R)HOUR_MINUTE (R)HOUR_SECOND (R)IIDENTIFIEDIF (R)IGNORE (R)IGNORE_SERVER_IDSIMPORTIN (R)INACTIVEINDEX (R)INDEXESINFILE (R)INITIALINITIAL_SIZEINITIATEINNER (R)INOUT (R)INSENSITIVE (R)INSERT (R)INSERT_METHODINSTALLINSTANCEINT (R)INT1 (R)INT2 (R)INT3 (R)INT4 (R)INT8 (R)INTEGER (R)INTERSECT (R)INTERVAL (R)INTO (R)INVISIBLEINVOKERIOIO_AFTER_GTIDS (R)IO_BEFORE_GTIDS (R)IO_THREADIPCIS (R)ISOLATIONISSUERITERATE (R)JJOIN (R)JSONJSON_TABLE (R)JSON_VALUEKKEY (R)KEYRINGKEYS (R)KEY_BLOCK_SIZEKILL (R)LLAG (R)LANGUAGELASTLAST_VALUE (R)LATERAL (R)LEAD (R)LEADING (R)LEAVE (R)LEAVESLEFT (R)LESSLEVELLIKE (R)LIMIT (R)LINEAR (R)LINES (R)LINESTRINGLISTLOAD (R)LOCALLOCALTIME (R)LOCALTIMESTAMP (R)LOCK (R)LOCKEDLOCKSLOGLOGFILELOGSLONG (R)LONGBLOB (R)LONGTEXT (R)LOOP (R)LOW_PRIORITY (R)MMASTERMASTER_AUTO_POSITIONMASTER_BIND (R)MASTER_COMPRESSION_ALGORITHMSMASTER_CONNECT_RETRYMASTER_DELAYMASTER_HEARTBEAT_PERIODMASTER_HOSTMASTER_LOG_FILEMASTER_LOG_POSMASTER_PASSWORDMASTER_PORTMASTER_PUBLIC_KEY_PATHMASTER_RETRY_COUNTMASTER_SSLMASTER_SSL_CAMASTER_SSL_CAPATHMASTER_SSL_CERTMASTER_SSL_CIPHERMASTER_SSL_CRLMASTER_SSL_CRLPATHMASTER_SSL_KEYMASTER_SSL_VERIFY_SERVER_CERT (R)MASTER_TLS_CIPHERSUITESMASTER_TLS_VERSIONMASTER_USERMASTER_ZSTD_COMPRESSION_LEVELMATCH (R)MAXVALUE (R)MAX_CONNECTIONS_PER_HOURMAX_QUERIES_PER_HOURMAX_ROWSMAX_SIZEMAX_UPDATES_PER_HOURMAX_USER_CONNECTIONSMEDIUMMEDIUMBLOB (R)MEDIUMINT (R)MEDIUMTEXT (R)MEMBERMEMORYMERGEMESSAGE_TEXTMICROSECONDMIDDLEINT (R)MIGRATEMINUTEMINUTE_MICROSECOND (R)MINUTE_SECOND (R)MIN_ROWSMOD (R)MODEMODIFIES (R)MODIFYMONTHMULTILINESTRINGMULTIPOINTMULTIPOLYGONMUTEXMYSQL_ERRNONNAMENAMESNATIONALNATURAL (R)NCHARNDBNDBCLUSTERNESTEDNETWORK_NAMESPACENEVERNEWNEXTNONODEGROUPNONENOT (R)NOWAITNO_WAITNO_WRITE_TO_BINLOG (R)NTH_VALUE (R)NTILE (R)NULL (R)NULLSNUMBERNUMERIC (R)NVARCHAROOF (R)OFFOFFSETOJOLDON (R)ONEONLYOPENOPTIMIZE (R)OPTIMIZER_COSTS (R)OPTION (R)OPTIONALOPTIONALLY (R)OPTIONSOR (R)ORDER (R)ORDINALITYORGANIZATIONOTHERSOUT (R)OUTER (R)OUTFILE (R)OVER (R)OWNERPPACK_KEYSPAGEPARALLEL (R)PARSERPARSE_TREEPARTIALPARTITION (R)PARTITIONINGPARTITIONSPASSWORDPASSWORD_LOCK_TIMEPATHPERCENT_RANK (R)PERSISTPERSIST_ONLYPHASEPLUGINPLUGINSPLUGIN_DIRPOINTPOLYGONPORTPRECEDESPRECEDINGPRECISION (R)PREPAREPRESERVEPREVPRIMARY (R)PRIVILEGESPRIVILEGE_CHECKS_USERPROCEDURE (R)PROCESSPROCESSLISTPROFILEPROFILESPROXYPURGE (R)QQUALIFY (R)QUARTERQUERYQUICKRRANDOMRANGE (R)RANK (R)READ (R)READS (R)READ_ONLYREAD_WRITE (R)REAL (R)REBUILDRECOVERRECURSIVE (R)REDO_BUFFER_SIZEREDUNDANTREFERENCEREFERENCES (R)REGEXP (R)REGISTRATIONRELAYRELAYLOGRELAY_LOG_FILERELAY_LOG_POSRELAY_THREADRELEASE (R)RELOADREMOVERENAME (R)REORGANIZEREPAIRREPEAT (R)REPEATABLEREPLACE (R)REPLICAREPLICASREPLICATE_DO_DBREPLICATE_DO_TABLEREPLICATE_IGNORE_DBREPLICATE_IGNORE_TABLEREPLICATE_REWRITE_DBREPLICATE_WILD_DO_TABLEREPLICATE_WILD_IGNORE_TABLEREPLICATIONREQUIRE (R)REQUIRE_ROW_FORMATRESETRESIGNAL (R)RESOURCERESPECTRESTARTRESTORERESTRICT (R)RESUMERETAINRETURN (R)RETURNED_SQLSTATERETURNINGRETURNSREUSEREVERSEREVOKE (R)RIGHT (R)RLIKE (R)ROLEROLLBACKROLLUPROTATEROUTINEROW (R)ROWS (R)ROW_COUNTROW_FORMATROW_NUMBER (R)RTREESS3SAVEPOINTSCHEDULESCHEMA (R)SCHEMAS (R)SCHEMA_NAMESECONDSECONDARYSECONDARY_ENGINESECONDARY_ENGINE_ATTRIBUTESECONDARY_LOADSECONDARY_UNLOADSECOND_MICROSECOND (R)SECURITYSELECT (R)SENSITIVE (R)SEPARATOR (R)SERIALSERIALIZABLESERVERSESSIONSET (R)SHARESHOW (R)SHUTDOWNSIGNAL (R)SIGNEDSIMPLESKIPSLAVESLOWSMALLINT (R)SNAPSHOTSOCKETSOMESONAMESOUNDSSOURCESOURCE_AUTO_POSITIONSOURCE_BINDSOURCE_COMPRESSION_ALGORITHMSSOURCE_CONNECT_RETRYSOURCE_DELAYSOURCE_HEARTBEAT_PERIODSOURCE_HOSTSOURCE_LOG_FILESOURCE_LOG_POSSOURCE_PASSWORDSOURCE_PORTSOURCE_PUBLIC_KEY_PATHSOURCE_RETRY_COUNTSOURCE_SSLSOURCE_SSL_CASOURCE_SSL_CAPATHSOURCE_SSL_CERTSOURCE_SSL_CIPHERSOURCE_SSL_CRLSOURCE_SSL_CRLPATHSOURCE_SSL_KEYSOURCE_SSL_VERIFY_SERVER_CERTSOURCE_TLS_CIPHERSUITESSOURCE_TLS_VERSIONSOURCE_USERSOURCE_ZSTD_COMPRESSION_LEVELSPATIAL (R)SPECIFIC (R)SQL (R)SQLEXCEPTION (R)SQLSTATE (R)SQLWARNING (R)SQL_AFTER_GTIDSSQL_AFTER_MTS_GAPSSQL_BEFORE_GTIDSSQL_BIG_RESULT (R)SQL_BUFFER_RESULTSQL_CALC_FOUND_ROWS (R)SQL_NO_CACHESQL_SMALL_RESULT (R)SQL_THREADSQL_TSI_DAYSQL_TSI_HOURSQL_TSI_MINUTESQL_TSI_MONTHSQL_TSI_QUARTERSQL_TSI_SECONDSQL_TSI_WEEKSQL_TSI_YEARSRIDSSL (R)STACKEDSTARTSTARTING (R)STARTSSTATS_AUTO_RECALCSTATS_PERSISTENTSTATS_SAMPLE_PAGESSTATUSSTOPSTORAGESTORED (R)STRAIGHT_JOIN (R)STREAMSTRINGSUBCLASS_ORIGINSUBJECTSUBPARTITIONSUBPARTITIONSSUPERSUSPENDSWAPSSWITCHESSYSTEM (R)TTABLE (R)TABLESTABLESPACETABLE_CHECKSUMTABLE_NAMETEMPORARYTEMPTABLETERMINATED (R)TEXTTHANTHEN (R)THREAD_PRIORITYTIESTIMETIMESTAMPTIMESTAMPADDTIMESTAMPDIFFTINYBLOB (R)TINYINT (R)TINYTEXT (R)TLSTO (R)TRAILING (R)TRANSACTIONTRIGGER (R)TRIGGERSTRUE (R)TRUNCATETYPETYPESUUNBOUNDEDUNCOMMITTEDUNDEFINEDUNDO (R)UNDOFILEUNDO_BUFFER_SIZEUNICODEUNINSTALLUNION (R)UNIQUE (R)UNKNOWNUNLOCK (R)UNREGISTERUNSIGNED (R)UNTILUPDATE (R)UPGRADEURLUSAGE (R)USE (R)USERUSER_RESOURCESUSE_FRMUSING (R)UTC_DATE (R)UTC_TIME (R)UTC_TIMESTAMP (R)VVALIDATIONVALUEVALUES (R)VARBINARY (R)VARCHAR (R)VARCHARACTER (R)VARIABLESVARYING (R)VCPUVIEWVIRTUAL (R)VISIBLEWWAITWARNINGSWEEKWEIGHT_STRINGWHEN (R)WHERE (R)WHILE (R)WINDOW (R)WITH (R)WITHOUTWORKWRAPPERWRITE (R)XX509XAXIDXMLXOR (R)YYEARYEAR_MONTH (R)ZZEROFILL (R)ZONEMySQL 8.3 New Keywords and Reserved Words
The following list shows the keywords and reserved words that are added in MySQL 8.3, compared to MySQL 8.2. Reserved keywords are marked with (R).A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | ZAACTIVEADMINARRAYATTRIBUTEAUTHENTICATIONBBUCKETSBULKCCHALLENGE_RESPONSECLONECOMPONENTCUME_DIST (R)DDEFINITIONDENSE_RANK (R)DESCRIPTIONEEMPTY (R)ENFORCEDENGINE_ATTRIBUTEEXCEPT (R)EXCLUDEFFACTORFAILED_LOGIN_ATTEMPTSFINISHFIRST_VALUE (R)FOLLOWINGGGENERATEGEOMCOLLECTIONGET_MASTER_PUBLIC_KEYGET_SOURCE_PUBLIC_KEYGROUPING (R)GROUPS (R)GTIDSGTID_ONLYHHISTOGRAMHISTORYIINACTIVEINITIALINITIATEINTERSECT (R)INVISIBLEJJSON_TABLE (R)JSON_VALUEKKEYRINGLLAG (R)LAST_VALUE (R)LATERAL (R)LEAD (R)LOCKEDLOGMMASTER_COMPRESSION_ALGORITHMSMASTER_PUBLIC_KEY_PATHMASTER_TLS_CIPHERSUITESMASTER_ZSTD_COMPRESSION_LEVELMEMBERNNESTEDNETWORK_NAMESPACENOWAITNTH_VALUE (R)NTILE (R)NULLSOOF (R)OFFOJOLDOPTIONALORDINALITYORGANIZATIONOTHERSOVER (R)PPARALLEL (R)PARSE_TREEPASSWORD_LOCK_TIMEPATHPERCENT_RANK (R)PERSISTPERSIST_ONLYPRECEDINGPRIVILEGE_CHECKS_USERPROCESSQQUALIFY (R)RRANDOMRANK (R)RECURSIVE (R)REFERENCEREGISTRATIONREPLICAREPLICASREQUIRE_ROW_FORMATRESOURCERESPECTRESTARTRETAINRETURNINGREUSEROLEROW_NUMBER (R)SS3SECONDARYSECONDARY_ENGINESECONDARY_ENGINE_ATTRIBUTESECONDARY_LOADSECONDARY_UNLOADSKIPSOURCE_AUTO_POSITIONSOURCE_BINDSOURCE_COMPRESSION_ALGORITHMSSOURCE_CONNECT_RETRYSOURCE_DELAYSOURCE_HEARTBEAT_PERIODSOURCE_HOSTSOURCE_LOG_FILESOURCE_LOG_POSSOURCE_PASSWORDSOURCE_PORTSOURCE_PUBLIC_KEY_PATHSOURCE_RETRY_COUNTSOURCE_SSLSOURCE_SSL_CASOURCE_SSL_CAPATHSOURCE_SSL_CERTSOURCE_SSL_CIPHERSOURCE_SSL_CRLSOURCE_SSL_CRLPATHSOURCE_SSL_KEYSOURCE_SSL_VERIFY_SERVER_CERTSOURCE_TLS_CIPHERSUITESSOURCE_TLS_VERSIONSOURCE_USERSOURCE_ZSTD_COMPRESSION_LEVELSRIDSTREAMSYSTEM (R)TTHREAD_PRIORITYTIESTLSUUNBOUNDEDUNREGISTERURLVVCPUVISIBLEWWINDOW (R)ZZONE

参考链接