mirror of
				https://github.com/MariaDB/server.git
				synced 2025-10-24 07:13:33 +03:00 
			
		
		
		
	NDB cluster is not fully supported. This will be added with
WL 1892 (NDB Handler: Add support for CREATE/DROP INDEX).
Some preparatory code for this is already present though.
A change for the "duplicate key" error message is planned
for another changeset.
include/my_base.h:
  WL#1563 - Modify MySQL to support fast CREATE/DROP INDEX
  Defined a mask of flags which must be the same for two indexes
  if they should compare as compatible.
  Added an error number for a new drop index error message.
mysql-test/r/key.result:
  WL#1563 - Modify MySQL to support fast CREATE/DROP INDEX
  The test result.
mysql-test/t/key.test:
  WL#1563 - Modify MySQL to support fast CREATE/DROP INDEX
  The test case.
sql/handler.cc:
  WL#1563 - Modify MySQL to support fast CREATE/DROP INDEX
  Prepared for a later change in an error message:
  Replace index number by index name for "duplicate key" error.
  Added handling for the new drop index error message.
sql/handler.h:
  WL#1563 - Modify MySQL to support fast CREATE/DROP INDEX
  Added new flags and methods.
  Removed old flags and methods (from the last attempt).
sql/share/errmsg.txt:
  WL#1563 - Modify MySQL to support fast CREATE/DROP INDEX
  Added a new error message for drop index.
sql/sql_table.cc:
  WL#1563 - Modify MySQL to support fast CREATE/DROP INDEX
  Moved definitions to the top of the file.
  In mysql_prepare_table() allow an index to have the name
  "PRIMARY" if it has the key type "Key::PRIMARY".
  Added a parenthesis for readability.
  Removed old code from the last attempt.
  Some changes to compare_tables():
  - Input parameter "List<Key> *key_list" is replaced by
    "KEY *key_info_buffer, uint key_count".
  - Output parameters added: "index_drop_buffer/index_drop_count"
    and "index_add_buffer/index_add_count".
  - Key comparison must now find matching keys in changed
    old and new key lists.
  - Key comparison of a key is easier now because both old
    and new keys are of type 'KEY'.
  Call mysql_prepare_table() before compare_tables(). The
  translated KEY structs are needed at some places now.
  Inserted a code segment for checking alter_table_flags().
  Removed mysql_prepare_table() from the 'partition' branches
  (it is done above now).
  Removed a pair of unnecessary braces.
  Inserted a code segment for executing fast add/drop index.
  Made close of table dependent on whether it was opened.
  Prepared for NDB cluster support.
  Fixed commit to be called outside of LOCK_open.
		
	
		
			
				
	
	
		
			433 lines
		
	
	
		
			13 KiB
		
	
	
	
		
			Plaintext
		
	
	
	
	
	
			
		
		
	
	
			433 lines
		
	
	
		
			13 KiB
		
	
	
	
		
			Plaintext
		
	
	
	
	
	
| --disable_warnings
 | |
| drop table if exists t1,t2,t3;
 | |
| --enable_warnings
 | |
| SET SQL_WARNINGS=1;
 | |
| 
 | |
| #
 | |
| # This failed for Elizabeth Mattijsen
 | |
| #
 | |
| 
 | |
| CREATE TABLE t1 (
 | |
|   ID CHAR(32) NOT NULL,
 | |
|   name CHAR(32) NOT NULL,
 | |
|   value CHAR(255),
 | |
|   INDEX indexIDname (ID(8),name(8))
 | |
| ) ;
 | |
| 
 | |
| INSERT INTO t1 VALUES
 | |
| ('keyword','indexdir','/export/home/local/www/database/indexes/keyword');
 | |
| INSERT INTO t1 VALUES ('keyword','urlprefix','text/ /text');
 | |
| INSERT INTO t1 VALUES ('keyword','urlmap','/text/ /');
 | |
| INSERT INTO t1 VALUES ('keyword','attr','personal employee company');
 | |
| INSERT INTO t1 VALUES
 | |
| ('emailgids','indexdir','/export/home/local/www/database/indexes/emailgids');
 | |
| INSERT INTO t1 VALUES ('emailgids','urlprefix','text/ /text');
 | |
| INSERT INTO t1 VALUES ('emailgids','urlmap','/text/ /');
 | |
| INSERT INTO t1 VALUES ('emailgids','attr','personal employee company');
 | |
| 
 | |
| SELECT value FROM t1 WHERE ID='emailgids' AND name='attr';
 | |
| 
 | |
| drop table t1;
 | |
| 
 | |
| #
 | |
| # Problem with many key parts and many or
 | |
| #
 | |
| 
 | |
| CREATE TABLE t1 (
 | |
|   price int(5) DEFAULT '0' NOT NULL,
 | |
|   area varchar(40) DEFAULT '' NOT NULL,
 | |
|   type varchar(40) DEFAULT '' NOT NULL,
 | |
|   transityes enum('Y','N') DEFAULT 'Y' NOT NULL,
 | |
|   shopsyes enum('Y','N') DEFAULT 'Y' NOT NULL,
 | |
|   schoolsyes enum('Y','N') DEFAULT 'Y' NOT NULL,
 | |
|   petsyes enum('Y','N') DEFAULT 'Y' NOT NULL,
 | |
|   KEY price (price,area,type,transityes,shopsyes,schoolsyes,petsyes)
 | |
| );
 | |
| 
 | |
| INSERT INTO t1 VALUES (900,'Vancouver','Shared/Roomate','N','N','N','N');
 | |
| INSERT INTO t1 VALUES (900,'Vancouver','Shared/Roomate','N','N','N','N');
 | |
| INSERT INTO t1 VALUES (900,'Vancouver','Shared/Roomate','','','','');
 | |
| INSERT INTO t1 VALUES (900,'Vancouver','Shared/Roomate','Y','Y','Y','Y');
 | |
| INSERT INTO t1 VALUES (900,'Vancouver','Shared/Roomate','Y','Y','Y','Y');
 | |
| INSERT INTO t1 VALUES (900,'Vancouver','Shared/Roomate','Y','Y','Y','Y');
 | |
| INSERT INTO t1 VALUES (900,'Vancouver','Shared/Roomate','Y','Y','Y','Y');
 | |
| INSERT INTO t1 VALUES (900,'Vancouver','Shared/Roomate','Y','Y','Y','Y');
 | |
| 
 | |
|  SELECT * FROM t1 WHERE area='Vancouver' and transityes='y' and schoolsyes='y' and ( ((type='1 Bedroom' or type='Studio/Bach') and (price<=500)) or ((type='2 Bedroom') and (price<=550)) or ((type='Shared/Roomate') and (price<=300)) or ((type='Room and Board') and (price<=500)) ) and price <= 400;
 | |
| 
 | |
| drop table t1;
 | |
| 
 | |
| #
 | |
| # No longer a problem with primary key
 | |
| #
 | |
| 
 | |
| CREATE TABLE t1 (program enum('signup','unique','sliding') not null,  type enum('basic','sliding','signup'),  sites set('mt'),  PRIMARY KEY (program));
 | |
| # This no longer give an error for wrong primary key
 | |
| ALTER TABLE t1 modify program enum('signup','unique','sliding');
 | |
| drop table t1;
 | |
| 
 | |
| #
 | |
| # Test of compressed decimal index.
 | |
| #
 | |
| 
 | |
| CREATE TABLE t1 (
 | |
|   name varchar(50) DEFAULT '' NOT NULL,
 | |
|   author varchar(50) DEFAULT '' NOT NULL,
 | |
|   category decimal(10,0) DEFAULT '0' NOT NULL,
 | |
|   email varchar(50),
 | |
|   password varchar(50),
 | |
|   proxy varchar(50),
 | |
|   bitmap varchar(20),
 | |
|   msg varchar(255),
 | |
|   urlscol varchar(127),
 | |
|   urlhttp varchar(127),
 | |
|   timeout decimal(10,0),
 | |
|   nbcnx decimal(10,0),
 | |
|   creation decimal(10,0),
 | |
|   livinguntil decimal(10,0),
 | |
|   lang decimal(10,0),
 | |
|   type decimal(10,0),
 | |
|   subcat decimal(10,0),
 | |
|   subtype decimal(10,0),
 | |
|   reg char(1),
 | |
|   scs varchar(255),
 | |
|   capacity decimal(10,0),
 | |
|   userISP varchar(50),
 | |
|   CCident varchar(50) DEFAULT '' NOT NULL,
 | |
|   PRIMARY KEY (name,author,category)
 | |
| );
 | |
| INSERT INTO t1 VALUES
 | |
| ('patnom','patauteur',0,'p.favre@cryo-networks.fr',NULL,NULL,'#p2sndnq6ae5g1u6t','essai salut','scol://195.242.78.119:patauteur.patnom',NULL,NULL,NULL,950036174,-882087474,NULL,3,0,3,'1','Pub/patnom/futur_divers.scs',NULL,'pat','CC1');
 | |
| INSERT INTO t1 VALUES
 | |
| ('LeNomDeMonSite','Marc',0,'m.barilley@cryo-networks.fr',NULL,NULL,NULL,NULL,'scol://195.242.78.119:Marc.LeNomDeMonSite',NULL,NULL,NULL,950560434,-881563214,NULL,3,0,3,'1','Pub/LeNomDeMonSite/domus_hibere.scs',NULL,'Marq','CC1');
 | |
| select * from t1 where name='patnom' and author='patauteur' and category=0;
 | |
| drop table t1;
 | |
| 
 | |
| #
 | |
| # Problem with search on partial index
 | |
| #
 | |
| 
 | |
| create table t1
 | |
| (
 | |
|   name_id int not null auto_increment,
 | |
|   name blob,
 | |
|   INDEX name_idx (name(5)),
 | |
|   primary key (name_id)
 | |
| );
 | |
| 
 | |
| INSERT t1 VALUES(NULL,'/');
 | |
| INSERT t1 VALUES(NULL,'[T,U]_axpby');         
 | |
| SELECT * FROM t1 WHERE name='[T,U]_axpy';
 | |
| SELECT * FROM t1 WHERE name='[T,U]_axpby';
 | |
| create table t2
 | |
| (
 | |
|   name_id int not null auto_increment,
 | |
|   name char(255) binary,
 | |
|   INDEX name_idx (name(5)),
 | |
|   primary key (name_id)
 | |
| );
 | |
| INSERT t2 select * from t1;
 | |
| SELECT * FROM t2 WHERE name='[T,U]_axpy';
 | |
| SELECT * FROM t2 WHERE name='[T,U]_axpby';
 | |
| # Test possible problems with warnings in CREATE ... SELECT
 | |
| CREATE TABLE t3 SELECT * FROM t2 WHERE name='[T,U]_axpby';
 | |
| SELECT * FROM t2 WHERE name='[T,U]_axpby';
 | |
| 
 | |
| drop table t1,t2,t3;
 | |
| 
 | |
| #
 | |
| # Test bug with long primary key
 | |
| #
 | |
| 
 | |
| create table t1
 | |
| (
 | |
|    SEQNO                         numeric(12 ) not null,
 | |
|    MOTYPEID                 numeric(12 ) not null,
 | |
|    MOINSTANCEID     numeric(12 ) not null,
 | |
|    ATTRID                       numeric(12 ) not null,
 | |
|    VALUE                         varchar(120) not null,
 | |
|    primary key (SEQNO, MOTYPEID, MOINSTANCEID, ATTRID, VALUE )
 | |
| );
 | |
| INSERT INTO t1 VALUES (1, 1, 1, 1, 'a'); 
 | |
| INSERT INTO t1 VALUES (1, 1, 1, 1, 'b'); 
 | |
| --error 1062
 | |
| INSERT INTO t1 VALUES (1, 1, 1, 1, 'a');
 | |
| drop table t1;
 | |
| 
 | |
| #
 | |
| # Test with blob + tinyint key
 | |
| # (Failed for Greg Valure)
 | |
| #
 | |
| 
 | |
| CREATE TABLE t1 (
 | |
|   a tinytext NOT NULL,
 | |
|   b tinyint(3) unsigned NOT NULL default '0',
 | |
|   PRIMARY KEY (a(32),b)
 | |
| ) ENGINE=MyISAM;
 | |
| INSERT INTO t1 VALUES ('a',1),('a',2);
 | |
| SELECT * FROM t1 WHERE a='a' AND b=2;
 | |
| SELECT * FROM t1 WHERE a='a' AND b in (2);
 | |
| SELECT * FROM t1 WHERE a='a' AND b in (1,2);
 | |
| drop table t1;
 | |
| 
 | |
| #
 | |
| # Test of create key order
 | |
| #
 | |
| 
 | |
| create table t1 (a int not null unique, b int unique, c int, d int not null primary key, key(c), e int not null unique);
 | |
| show keys from t1;
 | |
| drop table t1;
 | |
| 
 | |
| #
 | |
| # Problem with UNIQUE() with NULL parts and auto increment
 | |
| #
 | |
| 
 | |
| CREATE TABLE t1 (c CHAR(10) NOT NULL,i INT NOT NULL AUTO_INCREMENT,
 | |
| UNIQUE (c,i));
 | |
| INSERT INTO t1 (c) VALUES (NULL),(NULL);
 | |
| SELECT * FROM t1;
 | |
| INSERT INTO t1 (c) VALUES ('a'),('a');
 | |
| SELECT * FROM t1;
 | |
| DROP TABLE IF EXISTS t1;
 | |
| CREATE TABLE t1 (c CHAR(10) NULL, i INT NOT NULL AUTO_INCREMENT,
 | |
| UNIQUE (c,i));
 | |
| INSERT INTO t1 (c) VALUES (NULL),(NULL);
 | |
| SELECT * FROM t1;
 | |
| INSERT INTO t1 (c) VALUES ('a'),('a');
 | |
| SELECT * FROM t1;
 | |
| drop table t1;
 | |
| 
 | |
| #
 | |
| # longer keys
 | |
| #
 | |
| create table t1 (i int, a char(200), b text, unique (a), unique (b(300))) charset utf8;
 | |
| insert t1 values (1, repeat('a',210), repeat('b', 310));
 | |
| insert t1 values (2, repeat(0xD0B1,215), repeat(0xD0B1, 310));
 | |
| select i, length(a), length(b), char_length(a), char_length(b) from t1;
 | |
| select i from t1 where a=repeat(_utf8 'a',200);
 | |
| select i from t1 where a=repeat(_utf8 0xD0B1,200);
 | |
| select i from t1 where b=repeat(_utf8 'b',310);
 | |
| drop table t1;
 | |
| 
 | |
| #
 | |
| # Test of key read with primary key (Bug #3497)
 | |
| #
 | |
| 
 | |
| CREATE TABLE t1 (id int unsigned auto_increment, name char(50), primary key (id)) engine=myisam;
 | |
| insert into t1 (name) values ('a'), ('b'),('c'),('d'),('e'),('f'),('g');
 | |
| explain select 1 from t1 where id =2;
 | |
| explain select 1 from t1 where id =2 or id=3;
 | |
| explain select name from t1 where id =2;
 | |
| ALTER TABLE t1 DROP PRIMARY KEY, ADD INDEX (id);
 | |
| explain select 1 from t1 where id =2;
 | |
| drop table t1;
 | |
| 
 | |
| #
 | |
| # Test of problem with key read (Bug #3666)
 | |
| #
 | |
| 
 | |
| CREATE TABLE t1 (numeropost mediumint(8) unsigned NOT NULL default '0', numreponse int(10) unsigned NOT NULL auto_increment, PRIMARY KEY (numeropost,numreponse), UNIQUE KEY numreponse (numreponse));
 | |
| INSERT INTO t1 (numeropost,numreponse) VALUES ('1','1'),('1','2'),('2','3'),('2','4');
 | |
| SELECT numeropost FROM t1 WHERE numreponse='1';
 | |
| EXPLAIN SELECT numeropost FROM t1 WHERE numreponse='1';
 | |
| FLUSH TABLES;
 | |
| SELECT numeropost FROM t1 WHERE numreponse='1';
 | |
| drop table t1;
 | |
| 
 | |
| #
 | |
| # UNIQUE prefix keys and multi-byte charsets
 | |
| #
 | |
| 
 | |
| create table t1 (c varchar(30) character set utf8, t text character set utf8, unique (c(2)), unique (t(3))) engine=myisam;
 | |
| show create table t1;
 | |
| insert t1 values ('cccc', 'tttt'),
 | |
|   (0xD0B1212223D0B1D0B1D0B1D0B1D0B1, 0xD0B1D0B1212223D0B1D0B1D0B1D0B1),
 | |
|   (0xD0B1222123D0B1D0B1D0B1D0B1D0B1, 0xD0B1D0B1222123D0B1D0B1D0B1D0B1);
 | |
| --error 1062
 | |
| insert t1 (c) values ('cc22');
 | |
| --error 1062
 | |
| insert t1 (t) values ('ttt22');
 | |
| --error 1062
 | |
| insert t1 (c) values (0xD0B1212322D0B1D0B1D0B1D0B1D0B1);
 | |
| --error 1062
 | |
| insert t1 (t) values (0xD0B1D0B1212322D0B1D0B1D0B1D0B1);
 | |
| select c from t1 where c='cccc';
 | |
| select t from t1 where t='tttt';
 | |
| select c from t1 where c=0xD0B1212223D0B1D0B1D0B1D0B1D0B1;
 | |
| select t from t1 where t=0xD0B1D0B1212223D0B1D0B1D0B1D0B1;
 | |
| drop table t1;
 | |
| 
 | |
| #
 | |
| # BUG#6151 - myisam index corruption
 | |
| #
 | |
| DROP TABLE IF EXISTS t1;
 | |
| CREATE TABLE t1 (
 | |
|   c1 int,
 | |
|   c2 varbinary(240),
 | |
|   UNIQUE KEY (c1),
 | |
|   KEY (c2)
 | |
| ) ENGINE=MyISAM;
 | |
| INSERT INTO t1 VALUES (1,'\Z\Z\Z\Z');
 | |
| INSERT INTO t1 VALUES (2,'\Z\Z\Z\Z\Z\Z');
 | |
| INSERT INTO t1 VALUES (3,'\Z\Z\Z\Z');
 | |
| select c1 from t1 where c2='\Z\Z\Z\Z';
 | |
| DELETE FROM t1 WHERE (c1 = 1);
 | |
| check table t1;
 | |
| select c1 from t1 where c2='\Z\Z\Z\Z';
 | |
| DELETE FROM t1 WHERE (c1 = 3);
 | |
| check table t1;
 | |
| select c1 from t1 where c2='\Z\Z\Z\Z';
 | |
| 
 | |
| #
 | |
| # test delete of keys in a different order
 | |
| #
 | |
| truncate table t1;
 | |
| insert into t1 values(1,"aaaa"),(2,"aaab"),(3,"aaac"),(4,"aaccc");
 | |
| delete from t1 where c1=3;
 | |
| delete from t1 where c1=1;
 | |
| delete from t1 where c1=4;
 | |
| check table t1;
 | |
| 
 | |
| drop table t1;
 | |
| 
 | |
| #
 | |
| # Bug 6166: index prefix length of 0 not rejected
 | |
| #
 | |
| # this test should fail in 5.0
 | |
| # to fix it, remove #ifdef in 
 | |
| # file sql_yacc.yy(key_part)
 | |
| # create dedicated error code for this and
 | |
| # and change my_printf_error() to my_error
 | |
| 
 | |
| --error 1391
 | |
| create table t1 (c char(10), index (c(0)));
 | |
| 
 | |
| #
 | |
| # Bug #6126: Duplicate columns in keys should fail
 | |
| # Bug #6252: (dup)
 | |
| #
 | |
| --error 1060
 | |
| create table t1 (c char(10), index (c,c));
 | |
| --error 1060
 | |
| create table t1 (c1 char(10), c2 char(10), index (c1,c2,c1));
 | |
| --error 1060
 | |
| create table t1 (c1 char(10), c2 char(10), index (c1,c1,c2));
 | |
| --error 1060
 | |
| create table t1 (c1 char(10), c2 char(10), index (c2,c1,c1));
 | |
| create table t1 (c1 char(10), c2 char(10));
 | |
| --error 1060
 | |
| alter table t1 add key (c1,c1);
 | |
| --error 1060
 | |
| alter table t1 add key (c2,c1,c1);
 | |
| --error 1060
 | |
| alter table t1 add key (c1,c2,c1);
 | |
| --error 1060
 | |
| alter table t1 add key (c1,c1,c2);
 | |
| drop table t1;
 | |
| 
 | |
| #
 | |
| # Bug#12565 - ERROR 1034 when running simple UPDATE or DELETE 
 | |
| #             on large MyISAM table
 | |
| #
 | |
| create table t1 (
 | |
|   c1 int,
 | |
|   c2 varchar(20) not null,
 | |
|   primary key (c1),
 | |
|   key (c2(10))
 | |
| ) engine=myisam;
 | |
| insert into t1 values (1,'');
 | |
| insert into t1 values (2,' \t\tTest String');
 | |
| insert into t1 values (3,' \n\tTest String');
 | |
| update t1 set c2 = 'New Test String' where c1 = 1;
 | |
| select * from t1;
 | |
| drop table t1;
 | |
| 
 | |
| #
 | |
| # If we use a partial field for a key that is actually the length of the
 | |
| # field, and we extend the field, we end up with a key that includes the
 | |
| # whole new length of the field.
 | |
| #
 | |
| create table t1 (a varchar(10), b varchar(10), key(a(10),b(10)));
 | |
| show create table t1;
 | |
| alter table t1 modify b varchar(20);
 | |
| show create table t1;
 | |
| alter table t1 modify a varchar(20);
 | |
| show create table t1;
 | |
| drop table t1;
 | |
| 
 | |
| #
 | |
| # Bug #11227: Incorrectly reporting 'MUL' vs. 'UNI' on varchar
 | |
| #
 | |
| create table t1 (a int not null primary key, b varchar(20) not null unique);
 | |
| desc t1;
 | |
| drop table t1;
 | |
| create table t1 (a int not null primary key, b int not null unique);
 | |
| desc t1;
 | |
| drop table t1;
 | |
| create table t1 (a int not null primary key, b varchar(20) not null, unique (b(10)));
 | |
| desc t1;
 | |
| drop table t1;
 | |
| create table t1 (a int not null primary key, b varchar(20) not null, c varchar(20) not null, unique(b(10),c(10)));
 | |
| desc t1;
 | |
| drop table t1;
 | |
| 
 | |
| # End of 4.1 tests
 | |
| 
 | |
| #
 | |
| # WL#1563 - Modify MySQL to support on-line CREATE/DROP INDEX
 | |
| # To test if this really works, you need to run with --debug
 | |
| # and check the trace file.
 | |
| #
 | |
| # Create a table with named and unnamed indexes.
 | |
| create table t1 (
 | |
|     c1 int,
 | |
|     c2 char(12),
 | |
|     c3 varchar(123),
 | |
|     c4 timestamp,
 | |
|     index (c1),
 | |
|     index i1 (c1),
 | |
|     index i2 (c2),
 | |
|     index i3 (c3),
 | |
|     unique i4 (c4),
 | |
|     index i5 (c1, c2, c3, c4),
 | |
|     primary key (c2, c3),
 | |
|     index (c2, c4));
 | |
| show create table t1;
 | |
| # Some simple tests.
 | |
| alter table t1 drop index c1;
 | |
| alter table t1 add index (c1);
 | |
| # This creates index 'c1_2'.
 | |
| alter table t1 add index (c1);
 | |
| alter table t1 drop index i3;
 | |
| alter table t1 add index i3 (c3);
 | |
| # Two indexes at the same time.
 | |
| alter table t1 drop index i2, drop index i4;
 | |
| alter table t1 add index i2 (c2), add index i4 (c4);
 | |
| # Three indexes, one of them reversely.
 | |
| alter table t1 drop index i2, drop index i4, add index i6 (c2, c4);
 | |
| alter table t1 add index i2 (c2), add index i4 (c4), drop index i6;
 | |
| # include an unique index.
 | |
| alter table t1 drop index i2, drop index i4, add unique i4 (c4);
 | |
| alter table t1 add index i2 (c2), drop index i4, add index i4 (c4);
 | |
| # Modify an index by changing its definition.
 | |
| alter table t1 drop index c2, add index (c2(4),c3(7));
 | |
| # Change nothing. The new key definition is the same as the old one.
 | |
| alter table t1 drop index c2, add index (c2(4),c3(7));
 | |
| # Test primary key handling.
 | |
| alter table t1 add primary key (c1, c2), drop primary key;
 | |
| alter table t1 drop primary key;
 | |
| # Drop is checked first. Primary key must exist.
 | |
| --error 1091
 | |
| alter table t1 add primary key (c1, c2), drop primary key;
 | |
| show create table t1;
 | |
| # Insert non-unique values.
 | |
| insert into t1 values(1, 'a', 'a', NULL);
 | |
| insert into t1 values(1, 'b', 'b', NULL);
 | |
| # Drop some indexes for new adds.
 | |
| alter table t1 drop index i3, drop index i2, drop index i1;
 | |
| # Add indexes, one is unique on non-unique values.
 | |
| --error 1062
 | |
| alter table t1 add index i3 (c3), add index i2 (c2), add unique index i1 (c1);
 | |
| drop table t1;
 | |
| 
 |