Server IP : 104.21.38.3 / Your IP : 172.71.81.177 Web Server : Apache System : Linux krdc-ubuntu-s-2vcpu-4gb-amd-blr1-01.localdomain 5.15.0-142-generic #152-Ubuntu SMP Mon May 19 10:54:31 UTC 2025 x86_64 User : www ( 1000) PHP Version : 7.4.33 Disable Function : passthru,exec,system,putenv,chroot,chgrp,chown,shell_exec,popen,proc_open,pcntl_exec,ini_alter,ini_restore,dl,openlog,syslog,readlink,symlink,popepassthru,pcntl_alarm,pcntl_fork,pcntl_waitpid,pcntl_wait,pcntl_wifexited,pcntl_wifstopped,pcntl_wifsignaled,pcntl_wifcontinued,pcntl_wexitstatus,pcntl_wtermsig,pcntl_wstopsig,pcntl_signal,pcntl_signal_dispatch,pcntl_get_last_error,pcntl_strerror,pcntl_sigprocmask,pcntl_sigwaitinfo,pcntl_sigtimedwait,pcntl_exec,pcntl_getpriority,pcntl_setpriority,imap_open,apache_setenv MySQL : OFF | cURL : ON | WGET : ON | Perl : ON | Python : OFF | Sudo : ON | Pkexec : ON Directory : /www/server/mysql/src/mysql-test/suite/ndb/r/ |
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DROP TABLE IF EXISTS t1; create table t1 ( a int primary key, b varchar(10), c varchar(10), index (b) ) engine=ndb; insert into t1 values (1,'one','one'), (2,'two','two'), (3,'three','three'); create index c on t1(c); show indexes from t1; Table Non_unique Key_name Seq_in_index Column_name Collation Cardinality Sub_part Packed Null Index_type Comment Index_comment t1 0 PRIMARY 1 a A 3 NULL NULL BTREE t1 1 b 1 b A NULL NULL NULL YES BTREE t1 1 c 1 c A NULL NULL NULL YES BTREE select * from t1 where c = 'two'; a b c 2 two two alter table t1 drop index c; show indexes from t1; Table Non_unique Key_name Seq_in_index Column_name Collation Cardinality Sub_part Packed Null Index_type Comment Index_comment t1 0 PRIMARY 1 a A 3 NULL NULL BTREE t1 1 b 1 b A NULL NULL NULL YES BTREE select * from t1 where c = 'two'; a b c 2 two two drop table t1; create table t3 (a int primary key) engine=ndbcluster; insert into t3 values (1); alter table t3 rename t4; select * from t3; ERROR 42S02: Table 'test.t3' doesn't exist select * from t4; a 1 drop table t4; show tables; Tables_in_test drop table if exists t6; create table t6 (a int primary key ,b int) engine=ndbcluster; insert into t6 values(1,12), (2,12); alter table t6 add unique key ui_t(b); ERROR 23000: Can't write, because of unique constraint, to table 't6' delete from t6; insert into t6 values(1,12), (2,12); alter table t6 add unique key ui_t(b); ERROR 23000: Can't write, because of unique constraint, to table 't6' delete from t6; drop table t6;