Merge branch '10.2' into 10.3

mysql-test/suite/funcs_1/r/is_check_constraint.result

-#
-# MDEV-17323: Backport INFORMATION_SCHEMA.CHECK_CONSTRAINTS to 10.2
-#
-CREATE user boo1;
-GRANT select,create,alter,drop on foo.* to boo1;
-SHOW GRANTS for boo1;
-Grants for boo1@%
-GRANT USAGE ON *.* TO 'boo1'@'%'
-GRANT SELECT, CREATE, DROP, ALTER ON `foo`.* TO 'boo1'@'%'
-CREATE user boo2;
-create database foo;
-CONNECT con1,localhost, boo1,, foo;
-SET check_constraint_checks=1;
-CREATE TABLE t0
-(
-t int, check (t>32) # table constraint
-) ENGINE=myisam;
-SELECT * from information_schema.check_constraints;
-CONSTRAINT_CATALOG	CONSTRAINT_SCHEMA	CONSTRAINT_NAME	TABLE_NAME	CHECK_CLAUSE
-def	foo	CONSTRAINT_1	t0	`t` > 32
-ALTER TABLE t0
-ADD CONSTRAINT CHK_t0_t CHECK(t<100);
-SELECT * from information_schema.check_constraints;
-CONSTRAINT_CATALOG	CONSTRAINT_SCHEMA	CONSTRAINT_NAME	TABLE_NAME	CHECK_CLAUSE
-def	foo	CHK_t0_t	t0	`t` < 100
-def	foo	CONSTRAINT_1	t0	`t` > 32
-ALTER TABLE t0
-DROP CONSTRAINT CHK_t0_t;
-SELECT * from information_schema.check_constraints;
-CONSTRAINT_CATALOG	CONSTRAINT_SCHEMA	CONSTRAINT_NAME	TABLE_NAME	CHECK_CLAUSE
-def	foo	CONSTRAINT_1	t0	`t` > 32
-ALTER TABLE t0
-ADD CONSTRAINT CHECK(t<50);
-SELECT * from information_schema.check_constraints;
-CONSTRAINT_CATALOG	CONSTRAINT_SCHEMA	CONSTRAINT_NAME	TABLE_NAME	CHECK_CLAUSE
-def	foo	CONSTRAINT_1	t0	`t` > 32
-def	foo	CONSTRAINT_2	t0	`t` < 50
-CREATE TABLE t1
-( t int CHECK(t>2), # field constraint
-tt int,
-CONSTRAINT CHECK (tt > 32), CONSTRAINT CHECK (tt <50),# autogenerated names table constraints
-CONSTRAINT CHK_tt CHECK(tt<100) # named table constraint
-) ENGINE=InnoDB;
-SELECT * from information_schema.check_constraints;
-CONSTRAINT_CATALOG	CONSTRAINT_SCHEMA	CONSTRAINT_NAME	TABLE_NAME	CHECK_CLAUSE
-def	foo	CHK_tt	t1	`tt` < 100
-def	foo	CONSTRAINT_1	t0	`t` > 32
-def	foo	CONSTRAINT_1	t1	`tt` > 32
-def	foo	CONSTRAINT_2	t0	`t` < 50
-def	foo	CONSTRAINT_2	t1	`tt` < 50
-def	foo	t	t1	`t` > 2
-ALTER TABLE t1
-DROP CONSTRAINT CHK_tt;
-SELECT * from information_schema.check_constraints;
-CONSTRAINT_CATALOG	CONSTRAINT_SCHEMA	CONSTRAINT_NAME	TABLE_NAME	CHECK_CLAUSE
-def	foo	CONSTRAINT_1	t0	`t` > 32
-def	foo	CONSTRAINT_1	t1	`tt` > 32
-def	foo	CONSTRAINT_2	t0	`t` < 50
-def	foo	CONSTRAINT_2	t1	`tt` < 50
-def	foo	t	t1	`t` > 2
-CREATE TABLE t2
-(
-name VARCHAR(30) CHECK(CHAR_LENGTH(name)>2), #field constraint
-start_date DATE,
-end_date DATE,
-CONSTRAINT CHK_dates CHECK(start_date IS NULL) #table constraint
-)ENGINE=Innodb;
-SELECT * from information_schema.check_constraints;
-CONSTRAINT_CATALOG	CONSTRAINT_SCHEMA	CONSTRAINT_NAME	TABLE_NAME	CHECK_CLAUSE
-def	foo	CHK_dates	t2	`start_date` is null
-def	foo	CONSTRAINT_1	t0	`t` > 32
-def	foo	CONSTRAINT_1	t1	`tt` > 32
-def	foo	CONSTRAINT_2	t0	`t` < 50
-def	foo	CONSTRAINT_2	t1	`tt` < 50
-def	foo	name	t2	char_length(`name`) > 2
-def	foo	t	t1	`t` > 2
-ALTER TABLE t1
-ADD CONSTRAINT CHK_new_ CHECK(t>tt);
-SELECT * from information_schema.check_constraints;
-CONSTRAINT_CATALOG	CONSTRAINT_SCHEMA	CONSTRAINT_NAME	TABLE_NAME	CHECK_CLAUSE
-def	foo	CHK_dates	t2	`start_date` is null
-def	foo	CHK_new_	t1	`t` > `tt`
-def	foo	CONSTRAINT_1	t0	`t` > 32
-def	foo	CONSTRAINT_1	t1	`tt` > 32
-def	foo	CONSTRAINT_2	t0	`t` < 50
-def	foo	CONSTRAINT_2	t1	`tt` < 50
-def	foo	name	t2	char_length(`name`) > 2
-def	foo	t	t1	`t` > 2
-CREATE TABLE t3
-(
-a int,
-b int check (b>0), # field constraint named 'b'
-CONSTRAINT b check (b>10) # table constraint
-) ENGINE=InnoDB;
-SELECT * from information_schema.check_constraints;
-CONSTRAINT_CATALOG	CONSTRAINT_SCHEMA	CONSTRAINT_NAME	TABLE_NAME	CHECK_CLAUSE
-def	foo	CHK_dates	t2	`start_date` is null
-def	foo	CHK_new_	t1	`t` > `tt`
-def	foo	CONSTRAINT_1	t0	`t` > 32
-def	foo	CONSTRAINT_1	t1	`tt` > 32
-def	foo	CONSTRAINT_2	t0	`t` < 50
-def	foo	CONSTRAINT_2	t1	`tt` < 50
-def	foo	b	t3	`b` > 0
-def	foo	b	t3	`b` > 10
-def	foo	name	t2	char_length(`name`) > 2
-def	foo	t	t1	`t` > 2
-disconnect con1;
-CONNECT con2, localhost, boo2,, test;
-SELECT * from information_schema.check_constraints;
-CONSTRAINT_CATALOG	CONSTRAINT_SCHEMA	CONSTRAINT_NAME	TABLE_NAME	CHECK_CLAUSE
-disconnect con2;
-CONNECT con1, localhost, boo1,,foo;
-DROP TABLE t0;
-DROP TABLE t1;
-DROP TABLE t2;
-DROP TABLE t3;
-DROP DATABASE foo;
-disconnect con1;
-connection default;
-DROP USER boo1;
-DROP USER boo2;

mysql-test/suite/funcs_1/r/is_check_constraints.result

 #
 # MDEV-14474: Create INFORMATION_SCHEMA.CHECK_CONSTRAINTS
 #
-set check_constraint_checks=1;
-use test;
-create table t0
+CREATE user boo1;
+GRANT select,create,alter,drop on foo.* to boo1;
+SHOW GRANTS for boo1;
+Grants for boo1@%
+GRANT USAGE ON *.* TO 'boo1'@'%'
+GRANT SELECT, CREATE, DROP, ALTER ON `foo`.* TO 'boo1'@'%'
+CREATE user boo2;
+create database foo;
+CONNECT con1,localhost, boo1,, foo;
+SET check_constraint_checks=1;
+CREATE TABLE t0
 (
 t int, check (t>32) # table constraint
 ) ENGINE=myisam;
-SELECT * from information_schema.check_constraints order by check_clause;
-CONSTRAINT_CATALOG	def
-CONSTRAINT_SCHEMA	test
-CONSTRAINT_NAME	CONSTRAINT_1
-TABLE_NAME	t0
-CHECK_CLAUSE	`t` > 32
+SELECT * from information_schema.check_constraints;
+CONSTRAINT_CATALOG	CONSTRAINT_SCHEMA	TABLE_NAME	CONSTRAINT_NAME	CHECK_CLAUSE
+def	foo	t0	CONSTRAINT_1	`t` > 32
 ALTER TABLE t0
 ADD CONSTRAINT CHK_t0_t CHECK(t<100);
-SELECT * from information_schema.check_constraints order by check_clause;
-CONSTRAINT_CATALOG	def
-CONSTRAINT_SCHEMA	test
-CONSTRAINT_NAME	CHK_t0_t
-TABLE_NAME	t0
-CHECK_CLAUSE	`t` < 100
-CONSTRAINT_CATALOG	def
-CONSTRAINT_SCHEMA	test
-CONSTRAINT_NAME	CONSTRAINT_1
-TABLE_NAME	t0
-CHECK_CLAUSE	`t` > 32
+SELECT * from information_schema.check_constraints;
+CONSTRAINT_CATALOG	CONSTRAINT_SCHEMA	TABLE_NAME	CONSTRAINT_NAME	CHECK_CLAUSE
+def	foo	t0	CHK_t0_t	`t` < 100
+def	foo	t0	CONSTRAINT_1	`t` > 32
 ALTER TABLE t0
 DROP CONSTRAINT CHK_t0_t;
-SELECT * from information_schema.check_constraints order by check_clause;
-CONSTRAINT_CATALOG	def
-CONSTRAINT_SCHEMA	test
-CONSTRAINT_NAME	CONSTRAINT_1
-TABLE_NAME	t0
-CHECK_CLAUSE	`t` > 32
+SELECT * from information_schema.check_constraints;
+CONSTRAINT_CATALOG	CONSTRAINT_SCHEMA	TABLE_NAME	CONSTRAINT_NAME	CHECK_CLAUSE
+def	foo	t0	CONSTRAINT_1	`t` > 32
+ALTER TABLE t0
+ADD CONSTRAINT CHECK(t<50);
+SELECT * from information_schema.check_constraints;
+CONSTRAINT_CATALOG	CONSTRAINT_SCHEMA	TABLE_NAME	CONSTRAINT_NAME	CHECK_CLAUSE
+def	foo	t0	CONSTRAINT_1	`t` > 32
+def	foo	t0	CONSTRAINT_2	`t` < 50
 CREATE TABLE t1
 ( t int CHECK(t>2), # field constraint
-tt int, CONSTRAINT CHK_tt CHECK(tt<100) # table constraint
+tt int,
+CONSTRAINT CHECK (tt > 32), CONSTRAINT CHECK (tt <50),# autogenerated names table constraints
+CONSTRAINT CHK_tt CHECK(tt<100) # named table constraint
 ) ENGINE=InnoDB;
-SELECT * from information_schema.check_constraints order by check_clause;
-CONSTRAINT_CATALOG	def
-CONSTRAINT_SCHEMA	test
-CONSTRAINT_NAME	CHK_tt
-TABLE_NAME	t1
-CHECK_CLAUSE	`tt` < 100
-CONSTRAINT_CATALOG	def
-CONSTRAINT_SCHEMA	test
-CONSTRAINT_NAME	t
-TABLE_NAME	t1
-CHECK_CLAUSE	`t` > 2
-CONSTRAINT_CATALOG	def
-CONSTRAINT_SCHEMA	test
-CONSTRAINT_NAME	CONSTRAINT_1
-TABLE_NAME	t0
-CHECK_CLAUSE	`t` > 32
+SELECT * from information_schema.check_constraints;
+CONSTRAINT_CATALOG	CONSTRAINT_SCHEMA	TABLE_NAME	CONSTRAINT_NAME	CHECK_CLAUSE
+def	foo	t0	CONSTRAINT_1	`t` > 32
+def	foo	t0	CONSTRAINT_2	`t` < 50
+def	foo	t1	CHK_tt	`tt` < 100
+def	foo	t1	CONSTRAINT_1	`tt` > 32
+def	foo	t1	CONSTRAINT_2	`tt` < 50
+def	foo	t1	t	`t` > 2
 ALTER TABLE t1
 DROP CONSTRAINT CHK_tt;
-SELECT * from information_schema.check_constraints order by check_clause;
-CONSTRAINT_CATALOG	def
-CONSTRAINT_SCHEMA	test
-CONSTRAINT_NAME	t
-TABLE_NAME	t1
-CHECK_CLAUSE	`t` > 2
-CONSTRAINT_CATALOG	def
-CONSTRAINT_SCHEMA	test
-CONSTRAINT_NAME	CONSTRAINT_1
-TABLE_NAME	t0
-CHECK_CLAUSE	`t` > 32
-create table t2
+SELECT * from information_schema.check_constraints;
+CONSTRAINT_CATALOG	CONSTRAINT_SCHEMA	TABLE_NAME	CONSTRAINT_NAME	CHECK_CLAUSE
+def	foo	t0	CONSTRAINT_1	`t` > 32
+def	foo	t0	CONSTRAINT_2	`t` < 50
+def	foo	t1	CONSTRAINT_1	`tt` > 32
+def	foo	t1	CONSTRAINT_2	`tt` < 50
+def	foo	t1	t	`t` > 2
+CREATE TABLE t2
 (
 name VARCHAR(30) CHECK(CHAR_LENGTH(name)>2), #field constraint
 start_date DATE,
 end_date DATE,
 CONSTRAINT CHK_dates CHECK(start_date IS NULL) #table constraint
 )ENGINE=Innodb;
-SELECT * from information_schema.check_constraints order by check_clause;
-CONSTRAINT_CATALOG	def
-CONSTRAINT_SCHEMA	test
-CONSTRAINT_NAME	name
-TABLE_NAME	t2
-CHECK_CLAUSE	char_length(`name`) > 2
-CONSTRAINT_CATALOG	def
-CONSTRAINT_SCHEMA	test
-CONSTRAINT_NAME	CHK_dates
-TABLE_NAME	t2
-CHECK_CLAUSE	`start_date` is null
-CONSTRAINT_CATALOG	def
-CONSTRAINT_SCHEMA	test
-CONSTRAINT_NAME	t
-TABLE_NAME	t1
-CHECK_CLAUSE	`t` > 2
-CONSTRAINT_CATALOG	def
-CONSTRAINT_SCHEMA	test
-CONSTRAINT_NAME	CONSTRAINT_1
-TABLE_NAME	t0
-CHECK_CLAUSE	`t` > 32
+SELECT * from information_schema.check_constraints;
+CONSTRAINT_CATALOG	CONSTRAINT_SCHEMA	TABLE_NAME	CONSTRAINT_NAME	CHECK_CLAUSE
+def	foo	t0	CONSTRAINT_1	`t` > 32
+def	foo	t0	CONSTRAINT_2	`t` < 50
+def	foo	t1	CONSTRAINT_1	`tt` > 32
+def	foo	t1	CONSTRAINT_2	`tt` < 50
+def	foo	t1	t	`t` > 2
+def	foo	t2	CHK_dates	`start_date` is null
+def	foo	t2	name	char_length(`name`) > 2
 ALTER TABLE t1
 ADD CONSTRAINT CHK_new_ CHECK(t>tt);
-SELECT * from information_schema.check_constraints order by check_clause;
-CONSTRAINT_CATALOG	def
-CONSTRAINT_SCHEMA	test
-CONSTRAINT_NAME	name
-TABLE_NAME	t2
-CHECK_CLAUSE	char_length(`name`) > 2
-CONSTRAINT_CATALOG	def
-CONSTRAINT_SCHEMA	test
-CONSTRAINT_NAME	CHK_dates
-TABLE_NAME	t2
-CHECK_CLAUSE	`start_date` is null
-CONSTRAINT_CATALOG	def
-CONSTRAINT_SCHEMA	test
-CONSTRAINT_NAME	t
-TABLE_NAME	t1
-CHECK_CLAUSE	`t` > 2
-CONSTRAINT_CATALOG	def
-CONSTRAINT_SCHEMA	test
-CONSTRAINT_NAME	CONSTRAINT_1
-TABLE_NAME	t0
-CHECK_CLAUSE	`t` > 32
-CONSTRAINT_CATALOG	def
-CONSTRAINT_SCHEMA	test
-CONSTRAINT_NAME	CHK_new_
-TABLE_NAME	t1
-CHECK_CLAUSE	`t` > `tt`
-create table t3
+SELECT * from information_schema.check_constraints;
+CONSTRAINT_CATALOG	CONSTRAINT_SCHEMA	TABLE_NAME	CONSTRAINT_NAME	CHECK_CLAUSE
+def	foo	t0	CONSTRAINT_1	`t` > 32
+def	foo	t0	CONSTRAINT_2	`t` < 50
+def	foo	t1	CHK_new_	`t` > `tt`
+def	foo	t1	CONSTRAINT_1	`tt` > 32
+def	foo	t1	CONSTRAINT_2	`tt` < 50
+def	foo	t1	t	`t` > 2
+def	foo	t2	CHK_dates	`start_date` is null
+def	foo	t2	name	char_length(`name`) > 2
+CREATE TABLE t3
 (
 a int,
 b int check (b>0), # field constraint named 'b'
 CONSTRAINT b check (b>10) # table constraint
 ) ENGINE=InnoDB;
-select * from information_schema.check_constraints order by check_clause;
-CONSTRAINT_CATALOG	CONSTRAINT_SCHEMA	CONSTRAINT_NAME	TABLE_NAME	CHECK_CLAUSE
-def	test	name	t2	char_length(`name`) > 2
-def	test	b	t3	`b` > 0
-def	test	b	t3	`b` > 10
-def	test	CHK_dates	t2	`start_date` is null
-def	test	t	t1	`t` > 2
-def	test	CONSTRAINT_1	t0	`t` > 32
-def	test	CHK_new_	t1	`t` > `tt`
-drop table t0;
-drop table t1;
-drop table t2;
-drop table t3;
+SELECT * from information_schema.check_constraints;
+CONSTRAINT_CATALOG	CONSTRAINT_SCHEMA	TABLE_NAME	CONSTRAINT_NAME	CHECK_CLAUSE
+def	foo	t0	CONSTRAINT_1	`t` > 32
+def	foo	t0	CONSTRAINT_2	`t` < 50
+def	foo	t1	CHK_new_	`t` > `tt`
+def	foo	t1	CONSTRAINT_1	`tt` > 32
+def	foo	t1	CONSTRAINT_2	`tt` < 50
+def	foo	t1	t	`t` > 2
+def	foo	t2	CHK_dates	`start_date` is null
+def	foo	t2	name	char_length(`name`) > 2
+def	foo	t3	b	`b` > 0
+def	foo	t3	b	`b` > 10
+disconnect con1;
+CONNECT con2, localhost, boo2,, test;
+SELECT * from information_schema.check_constraints;
+CONSTRAINT_CATALOG	CONSTRAINT_SCHEMA	TABLE_NAME	CONSTRAINT_NAME	CHECK_CLAUSE
+disconnect con2;
+CONNECT con1, localhost, boo1,,foo;
+DROP TABLE t0;
+DROP TABLE t1;
+DROP TABLE t2;
+DROP TABLE t3;
+DROP DATABASE foo;
+disconnect con1;
+connection default;
+DROP USER boo1;
+DROP USER boo2;
+#
+# MDEV-18440: Information_schema.check_constraints possible data leak
+#
+CREATE USER foo;
+CREATE DATABASE db;
+USE db;
+CREATE TABLE t1 (a int, b int, CONSTRAINT CHECK (b > 0));
+INSERT INTO t1 VALUES (1, 2), (2, 3);
+GRANT SELECT (a) ON t1 TO foo;
+SHOW GRANTS FOR foo;
+Grants for foo@%
+GRANT USAGE ON *.* TO 'foo'@'%'
+GRANT SELECT (a) ON `db`.`t1` TO 'foo'@'%'
+SELECT * FROM information_schema.check_constraints;
+CONSTRAINT_CATALOG	CONSTRAINT_SCHEMA	TABLE_NAME	CONSTRAINT_NAME	CHECK_CLAUSE
+def	db	t1	CONSTRAINT_1	`b` > 0
+CONNECT con1,localhost, foo,, db;
+SELECT a FROM t1;
+a
+1
+2
+SELECT * FROM information_schema.check_constraints;
+CONSTRAINT_CATALOG	CONSTRAINT_SCHEMA	TABLE_NAME	CONSTRAINT_NAME	CHECK_CLAUSE
+connection default;
+DROP USER foo;
+DROP DATABASE db;

mysql-test/suite/funcs_1/t/is_check_constraint.test

---source include/have_innodb.inc
---source include/not_embedded.inc
---echo #
---echo # MDEV-17323: Backport INFORMATION_SCHEMA.CHECK_CONSTRAINTS to 10.2
---echo #
-CREATE user boo1;
-GRANT select,create,alter,drop on foo.* to boo1;
-SHOW GRANTS for boo1;
-CREATE user boo2;
-create database foo;
-# Connect with user boo1
-CONNECT(con1,localhost, boo1,, foo);
-
-SET check_constraint_checks=1;
-CREATE TABLE t0
-(
- t int, check (t>32) # table constraint
-) ENGINE=myisam;
---sorted_result
-SELECT * from information_schema.check_constraints;
-
-ALTER TABLE t0
-ADD CONSTRAINT CHK_t0_t CHECK(t<100);
---sorted_result
-SELECT * from information_schema.check_constraints;
-
-ALTER TABLE t0
-DROP CONSTRAINT CHK_t0_t;
---sorted_result
-SELECT * from information_schema.check_constraints;
-
-ALTER TABLE t0
-ADD CONSTRAINT CHECK(t<50);
---sorted_result
-SELECT * from information_schema.check_constraints;
-
-CREATE TABLE t1
-( t int CHECK(t>2), # field constraint
- tt int,
- CONSTRAINT CHECK (tt > 32), CONSTRAINT CHECK (tt <50),# autogenerated names table constraints
- CONSTRAINT CHK_tt CHECK(tt<100) # named table constraint
-) ENGINE=InnoDB;
- --sorted_result
-SELECT * from information_schema.check_constraints;
-
-ALTER TABLE t1
-DROP CONSTRAINT CHK_tt;
---sorted_result
-SELECT * from information_schema.check_constraints;
-
-CREATE TABLE t2
-(
-name VARCHAR(30) CHECK(CHAR_LENGTH(name)>2), #field constraint
-start_date DATE,
-end_date DATE,
-CONSTRAINT CHK_dates CHECK(start_date IS NULL) #table constraint
-)ENGINE=Innodb;
- --sorted_result
-SELECT * from information_schema.check_constraints;
-
-ALTER TABLE t1
-ADD CONSTRAINT CHK_new_ CHECK(t>tt);
---sorted_result
-SELECT * from information_schema.check_constraints;
-
-# Create table with same field and table check constraint name
-CREATE TABLE t3
-(
-a int,
-b int check (b>0), # field constraint named 'b'
-CONSTRAINT b check (b>10) # table constraint
-) ENGINE=InnoDB;
- --sorted_result
-SELECT * from information_schema.check_constraints;
-
-DISCONNECT con1;
-CONNECT(con2, localhost, boo2,, test);
- --sorted_result
-SELECT * from information_schema.check_constraints;
-
-DISCONNECT con2;
-CONNECT(con1, localhost, boo1,,foo);
-DROP TABLE t0;
-DROP TABLE t1;
-DROP TABLE t2;
-DROP TABLE t3;
-DROP DATABASE foo;
-
-DISCONNECT con1;
---CONNECTION default
-DROP USER boo1;
-DROP USER boo2;

mysql-test/suite/funcs_1/t/is_check_constraints.test

 --source include/have_innodb.inc
+--source include/not_embedded.inc
 --echo #
 --echo # MDEV-14474: Create INFORMATION_SCHEMA.CHECK_CONSTRAINTS
 --echo #
 
-set check_constraint_checks=1;
+CREATE user boo1;
+GRANT select,create,alter,drop on foo.* to boo1;
+SHOW GRANTS for boo1;
+CREATE user boo2;
+create database foo;
+# Connect with user boo1
+CONNECT(con1,localhost, boo1,, foo);
 
-use test;
-create table t0
+SET check_constraint_checks=1;
+CREATE TABLE t0
 (
  t int, check (t>32) # table constraint
 ) ENGINE=myisam;
-
---vertical_results
-SELECT * from information_schema.check_constraints order by check_clause;
+--sorted_result
+SELECT * from information_schema.check_constraints;
 
 ALTER TABLE t0
 ADD CONSTRAINT CHK_t0_t CHECK(t<100);
-
-SELECT * from information_schema.check_constraints order by check_clause;
+--sorted_result
+SELECT * from information_schema.check_constraints;
 
 ALTER TABLE t0
 DROP CONSTRAINT CHK_t0_t;
+--sorted_result
+SELECT * from information_schema.check_constraints;
 
-SELECT * from information_schema.check_constraints order by check_clause;
+ALTER TABLE t0
+ADD CONSTRAINT CHECK(t<50);
+--sorted_result
+SELECT * from information_schema.check_constraints;
 
 CREATE TABLE t1
 ( t int CHECK(t>2), # field constraint
- tt int, CONSTRAINT CHK_tt CHECK(tt<100) # table constraint
+ tt int,
+ CONSTRAINT CHECK (tt > 32), CONSTRAINT CHECK (tt <50),# autogenerated names table constraints
+ CONSTRAINT CHK_tt CHECK(tt<100) # named table constraint
 ) ENGINE=InnoDB;
-
-SELECT * from information_schema.check_constraints order by check_clause;
+--sorted_result
+SELECT * from information_schema.check_constraints;
 
 ALTER TABLE t1
 DROP CONSTRAINT CHK_tt;
+--sorted_result
+SELECT * from information_schema.check_constraints;
 
-SELECT * from information_schema.check_constraints order by check_clause;
-
-create table t2
+CREATE TABLE t2
 (
 name VARCHAR(30) CHECK(CHAR_LENGTH(name)>2), #field constraint
 start_date DATE,
 end_date DATE,
 CONSTRAINT CHK_dates CHECK(start_date IS NULL) #table constraint
 )ENGINE=Innodb;
-
-SELECT * from information_schema.check_constraints order by check_clause;
+--sorted_result
+SELECT * from information_schema.check_constraints;
 
 ALTER TABLE t1
 ADD CONSTRAINT CHK_new_ CHECK(t>tt);
-
-SELECT * from information_schema.check_constraints order by check_clause;
-
+--sorted_result
+SELECT * from information_schema.check_constraints;
 
 # Create table with same field and table check constraint name
-create table t3
+CREATE TABLE t3
 (
 a int,
 b int check (b>0), # field constraint named 'b'
 CONSTRAINT b check (b>10) # table constraint
 ) ENGINE=InnoDB;
+--sorted_result
+SELECT * from information_schema.check_constraints;
+
+DISCONNECT con1;
+CONNECT(con2, localhost, boo2,, test);
+--sorted_result
+SELECT * from information_schema.check_constraints;
+
+DISCONNECT con2;
+CONNECT(con1, localhost, boo1,,foo);
+DROP TABLE t0;
+DROP TABLE t1;
+DROP TABLE t2;
+DROP TABLE t3;
+DROP DATABASE foo;
+
+DISCONNECT con1;
+--CONNECTION default
+DROP USER boo1;
+DROP USER boo2;
+
+--echo #
+--echo # MDEV-18440: Information_schema.check_constraints possible data leak
+--echo #
+
+CREATE USER foo;
+CREATE DATABASE db;
+USE db;
+CREATE TABLE t1 (a int, b int, CONSTRAINT CHECK (b > 0));
+INSERT INTO t1 VALUES (1, 2), (2, 3);
+GRANT SELECT (a) ON t1 TO foo;
+
+SHOW GRANTS FOR foo;
+--sorted_result
+SELECT * FROM information_schema.check_constraints;
+
+CONNECT(con1,localhost, foo,, db);
+SELECT a FROM t1;
+--sorted_result
+SELECT * FROM information_schema.check_constraints;
 
---horizontal_results
-select * from information_schema.check_constraints order by check_clause;
+--CONNECTION default
 
-drop table t0;
-drop table t1;
-drop table t2;
-drop table t3;
+DROP USER foo;
+DROP DATABASE db;

sql/sql_show.cc

@@ -6865,23 +6865,35 @@ static int get_check_constraints_record(THD *thd, TABLE_LIST *tables,
     thd->clear_error();
     DBUG_RETURN(0);
   }
-  else if (!tables->view)
+  if (!tables->view)
   {
-    if (tables->table->s->table_check_constraints)
+    StringBuffer<MAX_FIELD_WIDTH> str(system_charset_info);
+#ifndef NO_EMBEDDED_ACCESS_CHECKS
+    TABLE_LIST table_acl_check;
+    bzero((char*) &table_acl_check, sizeof(table_acl_check));
+#endif
+    for (uint i= 0; i < tables->table->s->table_check_constraints; i++)
     {
-      for (uint i= 0; i < tables->table->s->table_check_constraints; i++)
+#ifndef NO_EMBEDDED_ACCESS_CHECKS
+      if (!(thd->col_access & TABLE_ACLS))
       {
-        StringBuffer<MAX_FIELD_WIDTH> str(system_charset_info);
-        Virtual_column_info *check= tables->table->check_constraints[i];
-        restore_record(table, s->default_values);
-        table->field[0]->store(STRING_WITH_LEN("def"), system_charset_info);
-        table->field[1]->store(db_name->str, db_name->length, system_charset_info);
-        table->field[2]->store(check->name.str, check->name.length, system_charset_info);
-        table->field[3]->store(table_name->str, table_name->length, system_charset_info);
-        check->print(&str);
-        table->field[4]->store(str.ptr(), str.length(), system_charset_info);
-        schema_table_store_record(thd, table);
+        table_acl_check.db= *db_name;
+        table_acl_check.table_name= *table_name;
+        table_acl_check.grant.privilege= thd->col_access;
+        if (check_grant(thd, TABLE_ACLS, &table_acl_check, FALSE, 1, TRUE))
+          continue;
       }
+#endif
+      Virtual_column_info *check= tables->table->check_constraints[i];
+      table->field[0]->store(STRING_WITH_LEN("def"), system_charset_info);
+      table->field[3]->store(check->name.str, check->name.length,
+                             system_charset_info);
+      /* Make sure the string is empty between each print. */
+      str.length(0);
+      check->print(&str);
+      table->field[4]->store(str.ptr(), str.length(), system_charset_info);
+      if (schema_table_store_record(thd, table))
+        DBUG_RETURN(1);
     }
   }
   DBUG_RETURN(res);
@@ -9806,9 +9818,9 @@ ST_FIELD_INFO check_constraints_fields_info[]=
   {"CONSTRAINT_CATALOG", FN_REFLEN, MYSQL_TYPE_STRING, 0, 0, 0, OPEN_FULL_TABLE},
   {"CONSTRAINT_SCHEMA", NAME_CHAR_LEN, MYSQL_TYPE_STRING, 0, 0, 0,
    OPEN_FULL_TABLE},
+  {"TABLE_NAME", NAME_CHAR_LEN, MYSQL_TYPE_STRING, 0, 0, 0, OPEN_FULL_TABLE},
   {"CONSTRAINT_NAME", NAME_CHAR_LEN, MYSQL_TYPE_STRING, 0, 0, 0,
    OPEN_FULL_TABLE},
-  {"TABLE_NAME", NAME_CHAR_LEN, MYSQL_TYPE_STRING, 0, 0, 0, OPEN_FULL_TABLE},
   {"CHECK_CLAUSE", NAME_CHAR_LEN, MYSQL_TYPE_STRING, 0, 0, 0,
    OPEN_FULL_TABLE},
   {0, 0, MYSQL_TYPE_STRING, 0, 0, 0, SKIP_OPEN_TABLE}
@@ -9828,8 +9840,8 @@ ST_SCHEMA_TABLE schema_tables[]=
    fill_schema_applicable_roles, 0, 0, -1, -1, 0, 0},
   {"CHARACTER_SETS", charsets_fields_info, 0,
    fill_schema_charsets, make_character_sets_old_format, 0, -1, -1, 0, 0},
-  {"CHECK_CONSTRAINTS", check_constraints_fields_info, 0,
-   get_all_tables, 0, get_check_constraints_record, 1, 2, 0, OPTIMIZE_I_S_TABLE|OPEN_TABLE_ONLY},
+  {"CHECK_CONSTRAINTS", check_constraints_fields_info, 0, get_all_tables, 0,
+   get_check_constraints_record, 1, 2, 0, OPTIMIZE_I_S_TABLE|OPEN_TABLE_ONLY},
   {"COLLATIONS", collation_fields_info, 0,
    fill_schema_collation, make_old_format, 0, -1, -1, 0, 0},
   {"COLLATION_CHARACTER_SET_APPLICABILITY", coll_charset_app_fields_info,