config root man

Current Path : /usr/opt/mysql57/mysql-test/suite/innodb_zip/t/

FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64
Upload File :
Current File : //usr/opt/mysql57/mysql-test/suite/innodb_zip/t/4k.test

# Tests for setting innodb-page-size=4k

--source include/have_innodb.inc
--source include/have_innodb_4k.inc
SET default_storage_engine=InnoDB;

--disable_query_log
let $MYSQLD_DATADIR = `select @@datadir`;
let $INNODB_PAGE_SIZE = `select @@innodb_page_size`;

call mtr.add_suppression("Cannot add field .* in table .* because after adding it, the row size is");
--enable_query_log

--echo # Test 1) Show the page size from Information Schema
--disable_warnings
SELECT variable_value FROM information_schema.global_status
       WHERE LOWER(variable_name) = 'innodb_page_size';
--enable_warnings

--echo # Test 2) The number of buffer pool pages is dependent upon the page size.
--disable_warnings
--replace_result 6144 {checked_valid}
SELECT variable_value FROM information_schema.global_status
       WHERE LOWER(variable_name) = 'innodb_buffer_pool_pages_total';
--enable_warnings

--echo # Test 3) Query some information_shema tables that are dependent upon
--echo #         the page size.
# Show the metadata for tables in schema 'mysql'.
# Pulled from innodb-system-table-view.test
# The IDs of mysql.innodb_table_stats and mysql.innodb_index_stats are
# unpredictable. They depend on whether mtr has created the database for
# this test from scratch or is using a previously created database where
# those tables have been dropped and recreated. Since we cannot force mtr
# to use a freshly created database for this test we do not return the
# table or index IDs. We can return the space IS of mysql schema tables
# since they are created consistently during bootstrap.
SELECT	t.name table_name, t.n_cols, t.flag table_flags,
	i.name index_name, i.page_no root_page, i.type,
	i.n_fields, i.merge_threshold
	FROM	INFORMATION_SCHEMA.INNODB_SYS_TABLES  t,
		INFORMATION_SCHEMA.INNODB_SYS_INDEXES i
	WHERE	t.table_id = i.table_id
	AND	t.name LIKE 'mysql%'
	ORDER BY t.name, i.index_id;

CREATE TABLE t1 (a INT KEY, b TEXT) ROW_FORMAT=REDUNDANT ENGINE=innodb;
CREATE TABLE t2 (a INT KEY, b TEXT) ROW_FORMAT=COMPACT ENGINE=innodb;
CREATE TABLE t3 (a INT KEY, b TEXT) ROW_FORMAT=COMPRESSED ENGINE=innodb;
CREATE TABLE t4 (a INT KEY, b TEXT) ROW_FORMAT=DYNAMIC ENGINE=innodb;

# Show the metadata for tables in schema 'test'.
# Do not return the space ID since this tablespace may have existed before
# this test runs.  The root page number of each index should be consistent
# within a file-per-table tablespace.
SELECT	t.name table_name, t.n_cols, t.flag table_flags,
	i.name index_name, i.page_no root_page, i.type,
	i.n_fields, i.merge_threshold
	FROM	INFORMATION_SCHEMA.INNODB_SYS_TABLES  t,
		INFORMATION_SCHEMA.INNODB_SYS_INDEXES i
	WHERE	t.table_id = i.table_id
	AND	t.name LIKE 'test%'
	ORDER BY t.name, i.name;
--source suite/innodb/include/show_i_s_tablespaces.inc
DROP TABLE t1, t2, t3, t4;

--echo # Test 4) The maximum row size is dependent upon the page size.
--echo #         Redundant: 1979, Compact: 1982.
--echo #         Compressed: 1982, Dynamic: 1982.
--echo #         Each row format has its own amount of overhead that
--echo #         varies depending on number of fields and other overhead.

SET SESSION innodb_strict_mode = ON;

# Redundant table; 1927 bytes with 10 CHAR fields
CREATE TABLE t1 (
c01 char(200), c02 char(200), c03 char(200), c04 char(200), c05 char(200),
c06 char(200), c07 char(200), c08 char(200), c09 char(200), c10 char(127)
) ROW_FORMAT=redundant;
DROP TABLE t1;
--replace_regex /> [0-9]*/> max_row_size/
--error ER_TOO_BIG_ROWSIZE
CREATE TABLE t1 (
c01 char(200), c02 char(200), c03 char(200), c04 char(200), c05 char(200),
c06 char(200), c07 char(200), c08 char(200), c09 char(200), c10 char(128)
) ROW_FORMAT=redundant;

# Compact table; 1955 bytes with 10 CHAR fields
CREATE TABLE t1 (
c01 char(200), c02 char(200), c03 char(200), c04 char(200), c05 char(200),
c06 char(200), c07 char(200), c08 char(200), c09 char(200), c10 char(155)
) ROW_FORMAT=compact;
DROP TABLE t1;
--replace_regex /> [0-9]*/> max_row_size/
--error ER_TOO_BIG_ROWSIZE
CREATE TABLE t1 (
c01 char(200), c02 char(200), c03 char(200), c04 char(200), c05 char(200),
c06 char(200), c07 char(200), c08 char(200), c09 char(200), c10 char(156)
) ROW_FORMAT=compact;

# Compressed table; 1878 bytes with 10 CHAR fields
# Bug#13391353 Limit is 1876 on 32-Linux only
CREATE TABLE t1 (
c01 char(200), c02 char(200), c03 char(200), c04 char(200), c05 char(200),
c06 char(200), c07 char(200), c08 char(200), c09 char(200), c10 char(76)
) ROW_FORMAT=compressed;
DROP TABLE t1;
--replace_regex /> [0-9]*/> max_row_size/
--error ER_TOO_BIG_ROWSIZE
CREATE TABLE t1 (
c01 char(200), c02 char(200), c03 char(200), c04 char(200), c05 char(200),
c06 char(200), c07 char(200), c08 char(200), c09 char(200), c10 char(79)
) ROW_FORMAT=compressed;

# Dynamic table; 1955 bytes with 10 CHAR fields
CREATE TABLE t1 (
c01 char(200), c02 char(200), c03 char(200), c04 char(200), c05 char(200),
c06 char(200), c07 char(200), c08 char(200), c09 char(200), c10 char(155)
) ROW_FORMAT=dynamic;
DROP TABLE t1;
--replace_regex /> [0-9]*/> max_row_size/
--error ER_TOO_BIG_ROWSIZE
CREATE TABLE t1 (
c01 char(200), c02 char(200), c03 char(200), c04 char(200), c05 char(200),
c06 char(200), c07 char(200), c08 char(200), c09 char(200), c10 char(156)
) ROW_FORMAT=dynamic;

#
# Test the maximum key length
# Moved from innodb-index.test since each page size has its own max key length.
# Max Key Length is 768 for 4k pages.
#
# InnoDB assumes 3 bytes for each UTF8 character.
#
CREATE TABLE t1 (a varchar(64) character set utf8,
                 b varchar(64) character set utf8,
                 c varchar(64) character set utf8,
                 d varchar(64) character set utf8,
                 PRIMARY KEY (a,b,c,d))
		 ENGINE=innodb;
DROP TABLE t1;
--error ER_TOO_LONG_KEY
CREATE TABLE t1 (a varchar(64) character set utf8,
                 b varchar(64) character set utf8,
                 c varchar(64) character set utf8,
                 d varchar(65) character set utf8,
                 PRIMARY KEY (a,b,c,d))
		 ENGINE=innodb;
CREATE TABLE t1 (a varchar(64) character set utf8,
                 b varchar(64) character set utf8,
                 c varchar(64) character set utf8,
                 d varchar(64) character set utf8,
                 e varchar(64) character set utf8,
                 PRIMARY KEY (a), KEY (b,c,d,e))
		 ENGINE=innodb;
DROP TABLE t1;
--error ER_TOO_LONG_KEY
CREATE TABLE t1 (a varchar(64) character set utf8,
                 b varchar(64) character set utf8,
                 c varchar(64) character set utf8,
                 d varchar(64) character set utf8,
                 e varchar(65) character set utf8,
                 PRIMARY KEY (a), KEY (b,c,d,e))
		 ENGINE=innodb;

--echo # Test 5) Make sure that KEY_BLOCK_SIZE=4, 2 & 1 are all
--echo #         accepted and that KEY_BLOCK_SIZE=16 & 8 are rejected
--echo #         in strict mode and converted to 4 in non-strict mode.

SET SESSION innodb_strict_mode = ON;

--error ER_ILLEGAL_HA
CREATE TABLE t1 (i int) ROW_FORMAT=COMPRESSED KEY_BLOCK_SIZE=16;
SHOW WARNINGS;

--error ER_ILLEGAL_HA
CREATE TABLE t1 ( i INT ) ROW_FORMAT=COMPRESSED KEY_BLOCK_SIZE=8;
SHOW WARNINGS;

CREATE TABLE t1 ( i INT ) ROW_FORMAT=COMPRESSED KEY_BLOCK_SIZE=4;
SHOW WARNINGS;
SELECT table_name, row_format, create_options
   FROM information_schema.tables WHERE table_name = 't1';

ALTER TABLE t1 KEY_BLOCK_SIZE=2;
SHOW WARNINGS;
SELECT table_name, row_format, create_options
   FROM information_schema.tables WHERE table_name = 't1';

ALTER TABLE t1 KEY_BLOCK_SIZE=1;
SHOW WARNINGS;
SELECT table_name, row_format, create_options
   FROM information_schema.tables WHERE table_name = 't1';

ALTER TABLE t1 KEY_BLOCK_SIZE=0;
SHOW WARNINGS;
SELECT table_name, row_format, create_options
   FROM information_schema.tables WHERE table_name = 't1';
DROP TABLE t1;

SET SESSION innodb_strict_mode = OFF;

CREATE TABLE t1 (i int) ROW_FORMAT=COMPRESSED KEY_BLOCK_SIZE=16;
SHOW WARNINGS;
SELECT table_name, row_format, create_options
   FROM information_schema.tables WHERE table_name = 't1';
DROP TABLE t1;

CREATE TABLE t1 ( i INT ) ROW_FORMAT=COMPRESSED KEY_BLOCK_SIZE=8;
SHOW WARNINGS;
SELECT table_name, row_format, create_options
   FROM information_schema.tables WHERE table_name = 't1';
DROP TABLE t1;

CREATE TABLE t1 ( i INT ) ROW_FORMAT=COMPRESSED KEY_BLOCK_SIZE=4;
SHOW WARNINGS;
SELECT table_name, row_format, create_options
   FROM information_schema.tables WHERE table_name = 't1';

ALTER TABLE t1 KEY_BLOCK_SIZE=2;
SHOW WARNINGS;
SELECT table_name, row_format, create_options
   FROM information_schema.tables WHERE table_name = 't1';

ALTER TABLE t1 KEY_BLOCK_SIZE=1;
SHOW WARNINGS;
SELECT table_name, row_format, create_options
   FROM information_schema.tables WHERE table_name = 't1';

ALTER TABLE t1 KEY_BLOCK_SIZE=0;
SHOW WARNINGS;
SELECT table_name, row_format, create_options
   FROM information_schema.tables WHERE table_name = 't1';
DROP TABLE t1;


--echo # Test 6) Make sure that KEY_BLOCK_SIZE = 8 and 16
--echo # are both rejected when innodb_file_per_table=OFF
# Moved from innodb-zip.test
SET SESSION innodb_strict_mode = ON;
SET GLOBAL innodb_file_per_table = OFF;
SHOW VARIABLES LIKE 'innodb_file_per_table';
--error ER_ILLEGAL_HA
CREATE TABLE t4 (id int PRIMARY KEY) ENGINE=innodb KEY_BLOCK_SIZE=8;
SHOW WARNINGS;
--error ER_ILLEGAL_HA
CREATE TABLE t5 (id int PRIMARY KEY) ENGINE=innodb KEY_BLOCK_SIZE=16;
SHOW WARNINGS;
SET GLOBAL innodb_file_per_table = ON;
SET GLOBAL innodb_file_format = `Antelope`;
--error ER_ILLEGAL_HA
CREATE TABLE t4 (id int PRIMARY KEY) ENGINE=innodb KEY_BLOCK_SIZE=8;
SHOW WARNINGS;
--error ER_ILLEGAL_HA
CREATE TABLE t5 (id int PRIMARY KEY) ENGINE=innodb KEY_BLOCK_SIZE=16;
SHOW WARNINGS;
SET GLOBAL innodb_file_format = `Barracuda`;


--echo # Test 7) Not included here; 16k only


--echo # Test 8) Test creating a table that could lead to undo log overflow.
CREATE TABLE t1(a blob,b blob,c blob,d blob,e blob,f blob,g blob,
                h blob,i blob,j blob,k blob,l blob,m blob,n blob,
		o blob,p blob,q blob,r blob,s blob,t blob,u blob)
		ENGINE=InnoDB ROW_FORMAT=dynamic;
SET @a = repeat('a', 767);
SET @b = repeat('b', 767);
SET @c = repeat('c', 767);
SET @d = repeat('d', 767);
SET @e = repeat('e', 767);

# With no indexes defined, we can update all columns to max key part length.
INSERT INTO t1 VALUES (@a,@a,@a,@a,@a,@a,@a,@a,@a,@a,@a,@a,@a,@a,@a,@a,@a,@a,@a,@a,@a);
UPDATE t1 SET a=@b,b=@b,c=@b,d=@b,e=@b,f=@b,g=@b,h=@b,i=@b,j=@b,
              k=@b,l=@b,m=@b,n=@b,o=@b,p=@b,q=@b,r=@b,s=@b,t=@b,u=@b;

# With one index defined, we can still update all fields.
CREATE INDEX t1a ON t1 (a(767));
UPDATE t1 SET a=@c,b=@c,c=@c,d=@c,e=@c,f=@c,g=@c,h=@c,i=@c,j=@c,
              k=@c,l=@c,m=@c,n=@c,o=@c,p=@c,q=@c,r=@c,s=@c,t=@c,u=@c;

# Add one more index and the UNDO record becomes too big to update all columns.
# But a single transaction can update the columns in separate statements.
# because the UNDO records will be smaller.
CREATE INDEX t1b ON t1 (b(767));
--error ER_UNDO_RECORD_TOO_BIG
UPDATE t1 SET a=@d,b=@d,c=@d,d=@d,e=@d,f=@d,g=@d,h=@d,i=@d,j=@d,
              k=@d,l=@d,m=@d,n=@d,o=@d,p=@d,q=@d,r=@d,s=@d,t=@d,u=@d;
BEGIN;
UPDATE t1 SET a=@d,b=@d,c=@d,d=@d,e=@d;
UPDATE t1 SET f=@d,g=@d,h=@d,i=@d,j=@d,k=@d,l=@d,m=@d,
              n=@d,o=@d,p=@d,q=@d,r=@d,s=@d,t=@d,u=@d;
COMMIT;

# Another index can still be added and a single field can still be updated
CREATE INDEX t1c ON t1 (c(767));
UPDATE t1 SET c=@e;

# Add one more index and we cannot update a column to its defined index length.
# This is a problem.  It means that the DDL is allowed to create a table
# that CANNOT be updated.  See bug#12953735.
CREATE INDEX t1d ON t1 (d(767));
--error ER_UNDO_RECORD_TOO_BIG
UPDATE t1 SET d=@e;

--replace_regex /> [0-9]*/> max_row_size/
CREATE INDEX t1e ON t1 (e(767));

SHOW CREATE TABLE t1;
DROP TABLE t1;

#
# Bug #13336585 - INNODB: CHANGE BUFFERING WITH 4K PAGES CAN ASSERT
#                 IF SECONDARY KEY IS NEAR MAX
# If the secondary index tuple is close to half the page size,
# ibuf_insert_low() could return DB_TOO_BIG_RECORD, which is not expected
# in ibuf_insert().  In order to insure this does not happen, WL5756
# imposes a maximum key length of 768 for 4k pages and 1536 for 8k pages.
# The existing max key Size for 16k pages is 3072.
#

#-- disable_query_log
# The flag innodb_change_buffering_debug is only available in debug builds.
# It instructs InnoDB to try to evict pages from the buffer pool when
# change buffering is possible, so that the change buffer will be used
# whenever possible.
# This flag is not used currently since it exposes valgrind error in ibuf
# code with the following SQL
#-- 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

# make sure the largest possible key entry can be added to the insert buffer.
# Make enough records so that the root page is not a leaf page.
SET SESSION innodb_strict_mode = OFF;
CREATE TABLE t1(
   pk01 varchar(48), pk02 varchar(48), pk03 varchar(48), pk04 varchar(48),
   pk05 varchar(48), pk06 varchar(48), pk07 varchar(48), pk08 varchar(48),
   pk09 varchar(48), pk10 varchar(48), pk11 varchar(48), pk12 varchar(48),
   pk13 varchar(48), pk14 varchar(48), pk15 varchar(48), pk16 varchar(48),
   sk01 varchar(48), sk02 varchar(48), sk03 varchar(48), sk04 varchar(48),
   sk05 varchar(48), sk06 varchar(48), sk07 varchar(48), sk08 varchar(48),
   sk09 varchar(48), sk10 varchar(48), sk11 varchar(48), sk12 varchar(48),
   sk13 varchar(48), sk14 varchar(48), sk15 varchar(48), sk16 varchar(48),
   PRIMARY KEY pk(pk01,pk02,pk03,pk04,pk05,pk06,pk07,pk08,
                  pk09,pk10,pk11,pk12,pk13,pk14,pk15,pk16),
   KEY pk(sk01,sk02,sk03,sk04,sk05,sk06,sk07,sk08,
          sk09,sk10,sk11,sk12,sk13,sk14,sk15,sk16))
   ROW_FORMAT=Redundant ENGINE=InnoDB;
SET @r = repeat('a', 48);
INSERT INTO t1 VALUES(@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,
                      @r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r);
SET @r = repeat('b', 48);
INSERT INTO t1 VALUES(@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,
                      @r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r);
SET @r = repeat('c', 48);
INSERT INTO t1 VALUES(@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,
                      @r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r);
SET @r = repeat('d', 48);
INSERT INTO t1 VALUES(@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,
                      @r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r);
SET @r = repeat('e', 48);
INSERT INTO t1 VALUES(@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,
                      @r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r);
DELETE from t1;
DROP TABLE t1;

# Compressed tables do not compress parent pages.  So the whole uncompressed
# secondary tuple including the primary key must be able to fit in half the
# compressed page size. This record length is enforced at index creation.
# So the only way to get an ibuf tuple too big is to make the KEY_BLOCK_SIZE
# the same as the page size.
CREATE TABLE t1(
   pk01 varchar(48), pk02 varchar(48), pk03 varchar(48), pk04 varchar(48),
   pk05 varchar(48), pk06 varchar(48), pk07 varchar(48), pk08 varchar(48),
   pk09 varchar(48), pk10 varchar(48), pk11 varchar(48), pk12 varchar(48),
   pk13 varchar(48), pk14 varchar(48), pk15 varchar(48), pk16 varchar(48),
   sk01 varchar(48), sk02 varchar(48), sk03 varchar(48), sk04 varchar(48),
   sk05 varchar(48), sk06 varchar(48), sk07 varchar(48), sk08 varchar(48),
   sk09 varchar(48), sk10 varchar(48), sk11 varchar(48), sk12 varchar(48),
   sk13 varchar(48), sk14 varchar(48), sk15 varchar(48), sk16 varchar(48),
   PRIMARY KEY pk(pk01,pk02,pk03,pk04,pk05,pk06,pk07,pk08,
                  pk09,pk10,pk11,pk12,pk13,pk14,pk15,pk16),
   KEY pk(sk01,sk02,sk03,sk04,sk05,sk06,sk07,sk08,
          sk09,sk10,sk11,sk12,sk13,sk14,sk15,sk16))
   ROW_FORMAT=Compressed KEY_BLOCK_SIZE=4 ENGINE=InnoDB;
SET @r = repeat('a', 48);
INSERT INTO t1 VALUES(@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,
                      @r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r);
SET @r = repeat('b', 48);
INSERT INTO t1 VALUES(@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,
                      @r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r);
SET @r = repeat('c', 48);
INSERT INTO t1 VALUES(@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,
                      @r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r);
SET @r = repeat('d', 48);
INSERT INTO t1 VALUES(@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,
                      @r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r);
SET @r = repeat('e', 48);
INSERT INTO t1 VALUES(@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,
                      @r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r);
DELETE from t1;
DROP TABLE t1;

#-- disable_query_log
#-- error 0,ER_UNKNOWN_SYSTEM_VARIABLE
#SET GLOBAL innodb_change_buffering_debug = 0;
#-- enable_query_log

# The following should fail in non-strict mode too.
# (The fix of Bug #50945 only affects REDUNDANT and COMPACT tables.)
SET SESSION innodb_strict_mode = off;
--replace_regex /> [0-9]*/> max_row_size/
CREATE TABLE t1(
	c text NOT NULL, d text NOT NULL,
	PRIMARY KEY (c(767)))
ENGINE=InnoDB ROW_FORMAT=COMPRESSED KEY_BLOCK_SIZE=1 CHARSET=ASCII;
DROP TABLE t1;
CREATE TABLE t1(
	c text NOT NULL, d text NOT NULL,
	PRIMARY KEY (c(767)))
ENGINE=InnoDB ROW_FORMAT=COMPRESSED KEY_BLOCK_SIZE=2 CHARSET=ASCII;
drop table t1;
CREATE TABLE t1(
	c text NOT NULL, d text NOT NULL,
	PRIMARY KEY (c(767)))
ENGINE=InnoDB ROW_FORMAT=COMPRESSED KEY_BLOCK_SIZE=4 CHARSET=ASCII;
drop table t1;
--replace_regex /> [0-9]*/> max_row_size/
CREATE TABLE t1(c text, PRIMARY KEY (c(440)))
ENGINE=InnoDB ROW_FORMAT=COMPRESSED KEY_BLOCK_SIZE=1 CHARSET=ASCII;
DROP TABLE t1;
CREATE TABLE t1(c text, PRIMARY KEY (c(438)))
ENGINE=InnoDB ROW_FORMAT=COMPRESSED KEY_BLOCK_SIZE=1 CHARSET=ASCII;
INSERT INTO t1 VALUES(REPEAT('A',512)),(REPEAT('B',512));
DROP TABLE t1;

Man Man