polardbxengine/mysql-test/t/dd_is_compatibility_cs.test

# Result differences depending on FS case sensitivity.
if (!$require_case_insensitive_file_system)
{
  --source include/have_case_sensitive_file_system.inc
}

#

--echo #########################################################
--echo # WL#6599: New data dictionary and I_S.
--echo # 
--echo # The re-implemntation of I_S as views on top of DD tables,
--echo # together with the modified way of retrieving statistics
--echo # information, introduces some differences when comparing
--echo # with the previous I_S implementation. The purpose of this
--echo # test is to focus on these behavioral differences, both
--echo # for the purpose of regression testing, and to document
--echo # the changes. The issues below refer to the items listed
--echo # in the WL#6599 text (HLS section 6).

USE test;


--echo #########################################################
--echo # Issue WL#6599/HLS/6a): Analyze table needed in FDS mode.
--echo #########################################################

SET information_schema_stats_expiry=default;

CREATE TABLE t1 (i INTEGER, KEY cached_key(i)) ENGINE=INNODB STATS_PERSISTENT=0;
INSERT INTO t1 VALUES (1), (2), (3), (4), (5), (6), (7), (8), (9), (10),
(11), (12), (13), (14), (15), (16), (17), (18), (19);

SHOW KEYS FROM t1 WHERE key_name LIKE 'cached%';
ANALYZE TABLE t1;
--echo # After ANALYZE, cardinality is correct.
SHOW KEYS FROM t1 WHERE key_name LIKE 'cached%';
DROP TABLE t1;

SET information_schema_stats_expiry=0;

--echo # Getting latest statistics does not need ANALYZE.
CREATE TABLE t1 (i INTEGER, KEY latest_key(i));
INSERT INTO t1 VALUES (1), (2), (3), (4), (5), (6), (7), (8), (9), (10);

--echo # Wait until InnoDB background thread updates the statistics.
let $wait_condition = SELECT stat_value = 10
      FROM mysql.innodb_index_stats
      WHERE table_name = 't1'
        AND index_name = 'latest_key'
        AND stat_name = 'n_diff_pfx01';
--source include/wait_condition.inc

--echo # Cardinality is correct even without ANALYZE.
--replace_column 7 #
SHOW KEYS FROM t1 WHERE key_name LIKE 'latest%';
DROP TABLE t1;

SET information_schema_stats_expiry=default;

--echo #########################################################
--echo # Issue WL#6599/HLS/6b): DD tables listed in I_S query output.
--echo #########################################################

--echo # The DD table 'mysql.tables' will not be visible.
SHOW TABLES in mysql LIKE 'tables';
--echo # But the privilege table 'mysql.tables_priv' will.
SHOW TABLES in mysql LIKE '%tables%';

--echo # The DD table 'mysql.tables' will not be visible.
SELECT table_name FROM information_schema.tables
  WHERE TABLE_NAME LIKE 'tables' AND TABLE_SCHEMA LIKE 'mysql'
  ORDER BY table_name COLLATE utf8_general_ci;
--echo # But the privilege table 'mysql.tables_priv' will.
SELECT table_name FROM information_schema.tables
  WHERE TABLE_NAME LIKE '%tables%' AND TABLE_SCHEMA LIKE 'mysql'
  ORDER BY table_name COLLATE utf8_general_ci;

--echo # The DD table 'mysql.tables' will be visible in the
--echo # I_S view definitions.
SHOW CREATE TABLE information_schema.tables;


--echo #########################################################
--echo # Issue WL#6599/HLS/6c): Capital cased I_S table column names.
--echo #########################################################

--echo # Default is that column names will be in upper case.
SELECT table_name FROM information_schema.tables
  WHERE table_schema = 'no such schema';

--echo # We can use an alias to get the desired case.
SELECT table_name as 'table_name' FROM information_schema.tables
  WHERE table_schema = 'no such schema';


--echo #########################################################
--echo # Issue WL#6599/HLS/6d): Row order of I_S queries.
--echo #########################################################

--echo # Developing such a test would sporadically fail,
--echo # Because the order depends on the Btree state at the time we
--echo # fetch rows from mysql.tables DD table.


--echo #########################################################
--echo # Issue WL#6599/HLS/6e): CREATE_TIME stored in DD table.
--echo #########################################################

CREATE TABLE t1 (f1 int);
INSERT INTO t1 VALUES (20);

--echo # Read create_time without analyze table.
SELECT TABLE_NAME,
       IF(CREATE_TIME IS NULL, 'no create time', 'have create time')
  FROM INFORMATION_SCHEMA.TABLES
  WHERE TABLE_NAME='t1';

DROP TABLE t1;

--echo #########################################################
--echo # Issue WL#6599/HLS/6g): CREATE TABLE LIKE and HANDLER statements.
--echo #########################################################

--echo # HANDLER statemenst on I_S views now return ER_WRONG_OBJECT rather than
--echo # ER_WRONG_USAGE.

--replace_result columns COLUMNS
--error ER_WRONG_OBJECT
HANDLER information_schema.COLUMNS OPEN;
USE test;

--echo # Because the I_S table is a view and not a table, we get this error.
--replace_result character_sets CHARACTER_SETS
--error ER_WRONG_OBJECT
CREATE TABLE t1 LIKE information_schema.CHARACTER_SETS;

--echo # An alternative way to to the same is.
CREATE TABLE t1 AS SELECT * FROM information_schema.CHARACTER_SETS;
SHOW CREATE TABLE t1;
DROP TABLE t1;

--echo # CREATE TABLE LIKE works for I_S tables that are not system view.
CREATE TABLE t1 LIKE information_schema.processlist;
SHOW CREATE TABLE t1;
DROP TABLE t1;


--echo #########################################################
--echo # Issue WL#6599/HLS/6h): I_S schema/table name,
--echo # case-sensitivity and l_c_t_n.
--echo #########################################################

--echo # 1. The column headings are now in upper case.
SELECT table_name FROM information_schema.tables
  WHERE table_name LIKE 'no_such_table';
SELECT table_name AS 'table_name'
  FROM information_schema.tables
  WHERE table_name LIKE 'no_such_table';

--echo # 2. The view names in I_S.tables are in upper case.

CREATE VIEW v1 AS SELECT table_name
  FROM information_schema.tables
  WHERE table_schema LIKE 'information_schema'
        AND table_name NOT LIKE 'INNODB%'
        AND table_name NOT LIKE 'ndb%'
  ORDER BY table_name COLLATE UTF8_GENERAL_CI;
SELECT * FROM v1;
DROP VIEW v1;

--echo # 3. I_S tables/views/columns are not case sensitive, but on trunk, the
--echo # two statements below will have different case of the column heading.

SELECT table_name FROM information_schema.tables
  WHERE table_name LIKE 'no_such_table';
SELECT TABLE_NAME FROM INFORMATION_SCHEMA.TABLES
  WHERE TABLE_NAME LIKE 'no_such_table';

--echo # 4. Names collate differently. On trunk, the queries below returns
--echo #    the same result set.

SELECT count(*) = IF(@@lower_case_table_names = 0, 4, 9)
  FROM information_schema.tables
  WHERE table_name LIKE 'TAB%';
SELECT count(*) = IF(@@lower_case_table_names = 0, 5, 9)
  FROM information_schema.tables
  WHERE table_name LIKE 'tab%';

--echo # This is because the collation of the column is different. On trunk,
--echo # it is utf8_general_ci. With the global DD, it is the collation of the
--echo # underlying column, which depends on l_c_t_n. For l_c_t_n == 0, this
--echo # is utf8_bin.


--echo #########################################################
--echo # Issue WL#6599/HLS/6i): I_S schema/table name in WHERE clause should
--echo #                        collate like mysql.tables.name.
--echo #########################################################

--echo # lctn=0 will have table_name as utf8_bin, so we do not match
--echo # capital information_schema name.
SELECT COUNT(*)+IF(@@lower_case_table_names=0, 1, 0) FROM
INFORMATION_SCHEMA.TABLES WHERE TABLE_SCHEMA='INFORMATION_SCHEMA' AND
TABLE_NAME='TABLES';


--echo #########################################################
--echo # WL#6599 HLS/6j
--echo # Prepared statements of SHOW commands fail differently for e.g.
--echo # ER_BAD_DB_ERROR unknown schema, instead of ER_TOO_BIG_SELECT for
--echo # big SELECT's.  This is consequence of we checking for existing
--echo # database first and then JOIN::optimize(). In 5.7 this was done in
--echo # the other way. For details we can see commit id
--echo # fb7f9ff0a3b6cafa88f6123875415a660eda15a7 by Abhishek. on 
--echo # mysql-trunk-wl6599
--echo #########################################################

SET @old_join_size= @@session.max_join_size;
SET @@session.max_join_size= 1;
PREPARE ps1 FROM 'SHOW TABLES FROM no_such_schema';
PREPARE ps2 FROM 'SHOW TABLES FROM mysql LIKE \'%tables%\'';
--error ER_BAD_DB_ERROR
EXECUTE ps1;
--error ER_TOO_BIG_SELECT
EXECUTE ps2;
DEALLOCATE PREPARE ps1;
DEALLOCATE PREPARE ps2;
SET @@session.max_join_size= @old_join_size;


--echo #########################################################
--echo # WL#6599 HLS/6k
--echo # ANALYZE TABLE under innodb read only mode fails with
--echo # error/warning. This would be a restrictions with wl6599. It is
--echo # recommended to use 'information_schema_stats_expiry=0' to get latest
--echo # statistics from IS queries in read only mode.
--echo #########################################################

use test;
CREATE TABLE t1(a INT PRIMARY KEY) ENGINE=InnoDB;
INSERT INTO t1 VALUES(1);
call mtr.add_suppression('Skipped updating resource group metadata in InnoDB read only mode.');
#--source include/restart_innodb_read_only.inc
ANALYZE TABLE t1;
let $restart_parameters = restart;
--source include/restart_mysqld.inc
DROP TABLE t1;


--echo #########################################################
--echo # WL#6599 HLS/6l
--echo # Most of the INFORMATION_SCHEMA table are re-implemented as view as
--echo # WL#6599. Current method of dumping INFORMATION_SCHEMA does not work
--echo # for views.
--echo # OTOH, INFORMATION_SCHEMA DB content dump is only used to reload the
--echo # data into another tables for analysis purpose. This feature is not the 
--echo # core responsibility of mysqlpump tool. INFORMATION_SCHEMA DB
--echo # content can be dumped using other methods like SELECT INTO OUTFILE ...
--echo # for such purpose. Hence ignoring INFORMATION_SCHEMA DB dump from
--echo # mysqldump and mysqlpump tool.
--echo #########################################################

CREATE DATABASE test1;
--error 1
--exec $MYSQL_DUMP --compact --opt -d INFORMATION_SCHEMA TABLES
--error 1
--exec $MYSQL_DUMP --compact --opt -d INFORMATION_SCHEMA
--error 1
--exec $MYSQL_DUMP --compact --opt -d --databases INFORMATION_SCHEMA test1
--error 1
--exec $MYSQL_DUMP --compact --opt -d --databases INFORMATION_SCHEMA

--echo # Following statements should pass as INFORMATION_SCHEMA db is not used.
--exec $MYSQL_DUMP --compact --opt -d --databases test1 >$MYSQLTEST_VARDIR/tmp/dump.sql
--exec $MYSQL_DUMP --compact --opt -d test1 >$MYSQLTEST_VARDIR/tmp/dump.sql

DROP DATABASE test1;
--remove_file $MYSQLTEST_VARDIR/tmp/dump.sql

--echo ########################################################################
--echo # In 5.7 code, MDL lock on the table being created in another session is
--echo # acquired by operation on INFORMATION_SCHMEA tables.
--echo # Since INFORMATION_SCHEMA views reads committed tables information from
--echo # new data dictionary, table being created in another session(uncommitted)
--echo # is not visible and no MDL is acquired on it.
--echo ########################################################################
--enable_connect_log

CREATE TABLE t1 (f1 INT);

LOCK TABLE t1 write;

connect (con1,localhost,root,,test,,);
--send CREATE TABLE t2 AS SELECT * FROM t1;

connect (con2,localhost,root,,test,,);
--echo # Waiting until CREATE TABLE ... SELECT ... is blocked.
let $wait_condition=
  select count(*) = 1 from information_schema.processlist
  where state = "Waiting for table metadata lock" and
        info = "CREATE TABLE t2 AS SELECT * FROM t1";
--source include/wait_condition.inc

--echo # In 5.7 code, following select is expected to wait for MDL lock on
--echo # table t2.
--echo # But no MDL lock is acquired on table being created by another
--echo # session(uncommited) with the INFORMATION_SCHEMA views on the
--echo # new data dictionary tables.
SELECT table_name, table_type, auto_increment, table_comment
       FROM information_schema.tables
       WHERE table_schema='test' and table_name='t2';

connection default;
UNLOCK TABLES;

connection con1;
--reap
DROP TABLE t1, t2;

# cleanup
connection default;
disconnect con1;
disconnect con2;
--disable_connect_log

--echo #
--echo # 6. Change in view IS_UDPATABLE value in I_S.views.
--echo #

CREATE TABLE t1 (c1 INT(11) DEFAULT NULL, c2 INT(11) DEFAULT NULL);
INSERT INTO t1 VALUES(5, 5);

CREATE VIEW v1 AS SELECT A.c1 AS c1 FROM t1 A
                  WHERE EXISTS(SELECT B.c2 FROM t1 B WHERE (B.c2 = A.c1));

--echo # View "v1" is non-updatable but "IS_UPDATABLE" column of I_S.views used
--echo # show view as "updatable". Now we get correct value for is_updatable
--echo # column for view "v1".
SELECT table_name, is_updatable FROM INFORMATION_SCHEMA.VIEWS
                                WHERE table_name = 'v1';

INSERT INTO v1 VALUES (10);
--error ER_NON_UPDATABLE_TABLE
UPDATE v1 SET c1=25;
--error ER_NON_UPDATABLE_TABLE
DELETE FROM v1;

--echo # Cleanup
DROP TABLE t1;
DROP VIEW v1;


--echo ########################################################################
--echo # In the 5.7 code while filling schema table "VIEWS", is_updatable column
--echo # of view is evaluated to YES/NO depending on view is mergable and view
--echo # has at least one updatable field in the view. 
--echo # Even while creating view and storing values in new DD tables, is_updatable
--echo # value is evaluated but there was no check to find view has at least
--echo # one updatable field. Without this check v1 below was evaluated to
--echo # updatable view instead of non-updatable.
--echo # Added check to find minimum one updatable field in create view code to
--echo # keep the behavior similar to 5.7.
--echo ########################################################################

CREATE TABLE t1(f1 int);
CREATE VIEW v1 AS SELECT f1+1 AS a FROM t1;
--echo # With out check for minimum one updatable field, is_updatable
--echo # field for view v1 was evaluated to YES instead of NO here.
SELECT table_name, is_updatable FROM INFORMATION_SCHEMA.VIEWS
    WHERE table_schema != 'sys' ORDER BY table_name;
DROP TABLE t1;
DROP VIEW v1;