What does MySQL rename database do?

Although MySQL has rename database syntax, but only in 5.1.7 to 5.1.23 provided, the other version does not, want to do rename operation how to do? Percona provides a shell

#!/Bin/bash# Copyright -Percona LLCand/orIts affiliatesSet -eif [- Z " $ $"]; Thenecho "rename_db<Server> <Database> <New_database>"    Exit 1fidb_exists=' MySQL-H $1 -E "Show databases like ' $'"-SSS 'if [- N "$db _exists"]; Thenecho "Error:newDatabaseAlreadyexists$3"    Exit 1fiTIMESTAMP=' Date+%s ' Character_set=' MySQL-H $1 -E "ShowCreate Database$2G "-Sss|Grep^Create |Awk-F'CHARACTER SET' '{print $}' |Awk'{print $}'' TABLES=' MySQL-H $1 -ESelecttable_name fromInformation_schema.tableswhereTable_schema=' $'  andTable_type='BASE TABLE'"-SSS ' STATUS=$?if ["$STATUS"! = 0] || [- Z "$TABLES"]; Thenecho "Error Retrieving tables from$2"    Exit 1Fiecho "Create Database$3 DEFAULT CHARACTER SET$character _set "MySQL-H $1 -ECreate Database$3 DEFAULT CHARACTER SET$character _set "TRIGGERS=' MySQL-H $1$2 -E "Show TRIGGERSG"|GrepTrigger:|Awk'{print $}'' views=' MySQL-H $1 -ESelecttable_name fromInformation_schema.tableswhereTable_schema=' $'  andTable_type='VIEW'"-SSS 'if [- N "$VIEWS"]; Thenmysqldump-H $1$2$VIEWS> /Tmp/${2}_views${TIMESTAMP}.DumpFimysqldump-H $1$2 -D-T-R-E> /Tmp/${2}_triggers${TIMESTAMP}.Dump for TRIGGER inch$TRIGGERS, do echo "Drop Trigger$TRIGGER"MySQL-H $1$2 -EDrop Trigger$TRIGGER" Done for TABLE inch$TABLES, do echo "renameTable$2.$TABLE  to$3.$TABLE"MySQL-H $1$2 -ESETForeign_key_checks=0; RenameTable$2.$TABLE  to$3.$TABLE" Doneif [- N "$VIEWS"]; Thenecho "Loading views" MySQL-H $1$3 < /Tmp/${2}_views${TIMESTAMP}.DumpFiecho "Loading triggers, routines andevents "MySQL-H $1$3 < /Tmp/${2}_triggers${TIMESTAMP}.DumpTABLES=' MySQL-H $1 -ESelecttable_name fromInformation_schema.tableswhereTable_schema=' $'  andTable_type='BASE TABLE'"-SSS 'if [- Z "$TABLES"]; Thenecho "DroppingDatabase$2"MySQL-H $1$2 -EDrop Database$2"Fiif [' mysql-h $1-e ' select COUNT (*) from Mysql.columns_priv where db= ' $ $ ' "-sss '-gt 0]; ThenColumns_priv="UPDATEMysql.columns_privSetDb=' $' WHEREDb=' $';" Fiif [' mysql-h $1-e ' select COUNT (*) from Mysql.procs_priv where db= ' $ $ ' "-sss '-gt 0]; ThenProcs_priv="UPDATEMysql.procs_privSetDb=' $' WHEREDb=' $';" Fiif [' mysql-h $1-e ' select COUNT (*) from Mysql.tables_priv where db= ' $ $ ' "-sss '-gt 0]; ThenTables_priv="UPDATEMysql.tables_privSetDb=' $' WHEREDb=' $';" Fiif [' mysql-h $1-e ' select COUNT (*) from mysql.db where db= ' $ $ ' "-sss '-gt 0]; ThenDb_priv="UPDATEMysql.dbSetDb=' $' WHEREDb=' $';" Fiif [- N "$COLUMNS _priv"] || [- N "$PROCS _priv"] || [- N "$TABLES _priv"] || [- N "$DB _priv"]; Thenecho "IFYou want toRENAME the GRANTS you need toRUN AllOUTPUT BELOW: "if [- N "$COLUMNS _priv"]; Thenecho "$COLUMNS _priv"; Fiif [- N "$PROCS _priv"]; Thenecho "$PROCS _priv"; Fiif [- N "$TABLES _priv"]; Thenecho "$TABLES _priv"; Fiif [- N "$DB _priv"]; Thenecho "$DB _priv"; fi echo "FlushPrivileges;" Fi

Source:

https://www.percona.com/blog/2013/12/24/renaming-database-schema-mysql/

What does MySQL rename database do?