^^&&^^

Edit File: innodb-2byte-collation.test

# Test for InnoDB support of 2 bytes (15 bits) collation ID
# Some of the example and test setup are adopted from ctype_ldml.test

--source include/have_innodb.inc
--source include/have_debug.inc
--source include/have_ucs2.inc
--source include/have_utf8mb4.inc
--source include/have_utf16.inc
--source include/have_utf32.inc

--replace_result $MYSQL_TEST_DIR MYSQL_TEST_DIR
show variables like 'character_sets_dir%';

set names utf8;

# Test that the "ID" column in I_S and SHOW queries can handle two bytes
select * from information_schema.collations where id>256 order by id;
show collation like '%test%';

# Test that two-byte collation ID is correctly transfered to the client side.
show collation like 'ucs2_vn_ci';
create table 2byte_collation (c1 char(1) character set ucs2 collate ucs2_vn_ci)
engine = InnoDB;

insert into 2byte_collation values (0x0061);
--enable_metadata
set @@character_set_results=NULL;
select * from 2byte_collation;
--disable_metadata
drop table 2byte_collation;

#
# Check maximum collation ID (2047 as of MySQL-6.0.9)
#
CREATE TABLE 2byte_collation (s1 char(10) character set utf8 collate utf8_maxuserid_ci) engine = innodb;
INSERT INTO 2byte_collation VALUES ('a'),('b');
SELECT * FROM 2byte_collation WHERE s1='a' ORDER BY BINARY s1;
DROP TABLE 2byte_collation;

# Excercise some change buffer code with the help of
# "innodb_change_buffering_debug"
-- error 0,ER_UNKNOWN_SYSTEM_VARIABLE
SET @innodb_change_buffering_debug_orig = @@innodb_change_buffering_debug;
-- error 0,ER_UNKNOWN_SYSTEM_VARIABLE
SET GLOBAL innodb_change_buffering_debug = 1;

-- enable_query_log

set names utf8;

show collation like 'utf8_maxuserid_ci';

CREATE TABLE 2byte_collation(
       a INT AUTO_INCREMENT PRIMARY KEY,
       b CHAR(100) character set utf8 collate utf8_maxuserid_ci,
       c INT,
       z INT,
       INDEX(b))
ENGINE=InnoDB STATS_PERSISTENT=0;

INSERT INTO 2byte_collation VALUES(0,'x',1, 1);

CREATE UNIQUE INDEX idx3 ON 2byte_collation(c, b);

INSERT INTO 2byte_collation SELECT 0,b,c+1,z+1 FROM 2byte_collation;
INSERT INTO 2byte_collation SELECT 0,b,c+10,z+10 FROM 2byte_collation;
INSERT INTO 2byte_collation SELECT 0,b,c+20,z+20 FROM 2byte_collation;
INSERT INTO 2byte_collation SELECT 0,b,c+50,z+50 FROM 2byte_collation;
INSERT INTO 2byte_collation SELECT 0,b,c+100,z+100 FROM 2byte_collation;
INSERT INTO 2byte_collation SELECT 0,b,c+200,z+200 FROM 2byte_collation;
INSERT INTO 2byte_collation SELECT 0,b,c+400,z+400 FROM 2byte_collation;
INSERT INTO 2byte_collation SELECT 0,b,c+800,z+800 FROM 2byte_collation;
INSERT INTO 2byte_collation SELECT 0,b,c+1600,z+1600 FROM 2byte_collation;
INSERT INTO 2byte_collation SELECT 0,b,c+4000,z+4000 FROM 2byte_collation;

CREATE INDEX idx5 ON 2byte_collation(b, c);

SELECT b FROM 2byte_collation LIMIT 10;

INSERT INTO 2byte_collation VALUES (10001, "a", 20001, 20001);

UPDATE 2byte_collation set b = "aaa" where c = 20001;

DROP TABLE 2byte_collation;

-- error 0, ER_UNKNOWN_SYSTEM_VARIABLE
SET GLOBAL innodb_change_buffering_debug = 0;