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CREATE TABLE t1(a INT, b INT);
CREATE INDEX IF NOT EXISTS i1 ON t1(a);
SHOW CREATE TABLE t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` int(11) DEFAULT NULL,
`b` int(11) DEFAULT NULL,
KEY `i1` (`a`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1
DROP INDEX IF EXISTS i1 ON t1;
SHOW CREATE TABLE t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` int(11) DEFAULT NULL,
`b` int(11) DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1
DROP INDEX IF EXISTS i1 ON t1;
Warnings:
Note 1091 Can't DROP 'i1'; check that column/key exists
SHOW CREATE TABLE t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` int(11) DEFAULT NULL,
`b` int(11) DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1
CREATE OR REPLACE INDEX i1 ON t1(a);
SHOW CREATE TABLE t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` int(11) DEFAULT NULL,
`b` int(11) DEFAULT NULL,
KEY `i1` (`a`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1
CREATE OR REPLACE INDEX i1 ON t1(a,b);
SHOW CREATE TABLE t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` int(11) DEFAULT NULL,
`b` int(11) DEFAULT NULL,
KEY `i1` (`a`,`b`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1
DROP TABLE t1;
CREATE OR REPLACE INDEX IF NOT EXISTS i1 ON t1(b,a);
ERROR HY000: Incorrect usage of OR REPLACE and IF NOT EXISTS
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