Merge branch 'MDEV1732_check_constraint_10.2_v1' of...

Merge branch 'MDEV1732_check_constraint_10.2_v1' of https://github.com/an3l/server into an3l-MDEV1732_check_constraint_10.2_v1

mysql-test/r/information_schema-big.result

-DROP TABLE IF EXISTS t0,t1,t2,t3,t4,t5;
-DROP VIEW IF EXISTS v1;
 #
 # Bug#18925: subqueries with MIN/MAX functions on INFORMATION_SCHEMA 
 #
@@ -22,6 +20,7 @@ table_name	column_name
 ALL_PLUGINS	PLUGIN_NAME
 APPLICABLE_ROLES	GRANTEE
 CHARACTER_SETS	CHARACTER_SET_NAME
+CHECK_CONSTRAINTS	CONSTRAINT_SCHEMA
 CLIENT_STATISTICS	CLIENT
 COLLATIONS	COLLATION_NAME
 COLLATION_CHARACTER_SET_APPLICABILITY	COLLATION_NAME
@@ -79,6 +78,7 @@ table_name	column_name
 ALL_PLUGINS	PLUGIN_NAME
 APPLICABLE_ROLES	GRANTEE
 CHARACTER_SETS	CHARACTER_SET_NAME
+CHECK_CONSTRAINTS	CONSTRAINT_SCHEMA
 CLIENT_STATISTICS	CLIENT
 COLLATIONS	COLLATION_NAME
 COLLATION_CHARACTER_SET_APPLICABILITY	COLLATION_NAME

mysql-test/r/information_schema.result

@@ -51,6 +51,7 @@ c
 ALL_PLUGINS
 APPLICABLE_ROLES
 CHARACTER_SETS
+CHECK_CONSTRAINTS
 CLIENT_STATISTICS
 COLLATIONS
 COLLATION_CHARACTER_SET_APPLICABILITY
@@ -922,6 +923,7 @@ connection user10261;
 SELECT TABLE_NAME, COLUMN_NAME, PRIVILEGES FROM INFORMATION_SCHEMA.COLUMNS 
 where COLUMN_NAME='TABLE_NAME' and table_name not like 'innodb%';
 TABLE_NAME	COLUMN_NAME	PRIVILEGES
+CHECK_CONSTRAINTS	TABLE_NAME	select
 COLUMNS	TABLE_NAME	select
 COLUMN_PRIVILEGES	TABLE_NAME	select
 FILES	TABLE_NAME	select

mysql-test/r/information_schema_all_engines.result

@@ -4,6 +4,7 @@ Tables_in_information_schema
 ALL_PLUGINS
 APPLICABLE_ROLES
 CHARACTER_SETS
+CHECK_CONSTRAINTS
 CLIENT_STATISTICS
 COLLATIONS
 COLLATION_CHARACTER_SET_APPLICABILITY
@@ -83,6 +84,7 @@ table_name	column_name
 ALL_PLUGINS	PLUGIN_NAME
 APPLICABLE_ROLES	GRANTEE
 CHARACTER_SETS	CHARACTER_SET_NAME
+CHECK_CONSTRAINTS	CONSTRAINT_SCHEMA
 CLIENT_STATISTICS	CLIENT
 COLLATIONS	COLLATION_NAME
 COLLATION_CHARACTER_SET_APPLICABILITY	COLLATION_NAME
@@ -162,6 +164,7 @@ table_name	column_name
 ALL_PLUGINS	PLUGIN_NAME
 APPLICABLE_ROLES	GRANTEE
 CHARACTER_SETS	CHARACTER_SET_NAME
+CHECK_CONSTRAINTS	CONSTRAINT_SCHEMA
 CLIENT_STATISTICS	CLIENT
 COLLATIONS	COLLATION_NAME
 COLLATION_CHARACTER_SET_APPLICABILITY	COLLATION_NAME
@@ -247,6 +250,7 @@ table_name	group_concat(t.table_schema, '.', t.table_name)	num1
 ALL_PLUGINS	information_schema.ALL_PLUGINS	1
 APPLICABLE_ROLES	information_schema.APPLICABLE_ROLES	1
 CHARACTER_SETS	information_schema.CHARACTER_SETS	1
+CHECK_CONSTRAINTS	information_schema.CHECK_CONSTRAINTS	1
 CLIENT_STATISTICS	information_schema.CLIENT_STATISTICS	1
 COLLATIONS	information_schema.COLLATIONS	1
 COLLATION_CHARACTER_SET_APPLICABILITY	information_schema.COLLATION_CHARACTER_SET_APPLICABILITY	1
@@ -315,6 +319,7 @@ Database: information_schema
 | ALL_PLUGINS                           |
 | APPLICABLE_ROLES                      |
 | CHARACTER_SETS                        |
+| CHECK_CONSTRAINTS                     |
 | CLIENT_STATISTICS                     |
 | COLLATIONS                            |
 | COLLATION_CHARACTER_SET_APPLICABILITY |
@@ -384,6 +389,7 @@ Database: INFORMATION_SCHEMA
 | ALL_PLUGINS                           |
 | APPLICABLE_ROLES                      |
 | CHARACTER_SETS                        |
+| CHECK_CONSTRAINTS                     |
 | CLIENT_STATISTICS                     |
 | COLLATIONS                            |
 | COLLATION_CHARACTER_SET_APPLICABILITY |
@@ -453,5 +459,5 @@ Wildcard: inf_rmation_schema
 | information_schema |
 SELECT table_schema, count(*) FROM information_schema.TABLES WHERE table_schema IN ('mysql', 'INFORMATION_SCHEMA', 'test', 'mysqltest') GROUP BY TABLE_SCHEMA;
 table_schema	count(*)
-information_schema	64
+information_schema	65
 mysql	30

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	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;
+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;
+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 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	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;
+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;
+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;
+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;
+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;

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

@@ -24,6 +24,11 @@ def	information_schema	CHARACTER_SETS	CHARACTER_SET_NAME	1	''	NO	varchar	32	96	N
 def	information_schema	CHARACTER_SETS	DEFAULT_COLLATE_NAME	2	''	NO	varchar	32	96	NULL	NULL	NULL	utf8	utf8_general_ci	varchar(32)			select		NEVER	NULL
 def	information_schema	CHARACTER_SETS	DESCRIPTION	3	''	NO	varchar	60	180	NULL	NULL	NULL	utf8	utf8_general_ci	varchar(60)			select		NEVER	NULL
 def	information_schema	CHARACTER_SETS	MAXLEN	4	0	NO	bigint	NULL	NULL	19	0	NULL	NULL	NULL	bigint(3)			select		NEVER	NULL
+def	information_schema	CHECK_CONSTRAINTS	CHECK_CLAUSE	5	''	NO	varchar	64	192	NULL	NULL	NULL	utf8	utf8_general_ci	varchar(64)			select		NEVER	NULL
+def	information_schema	CHECK_CONSTRAINTS	CONSTRAINT_CATALOG	1	''	NO	varchar	512	1536	NULL	NULL	NULL	utf8	utf8_general_ci	varchar(512)			select		NEVER	NULL
+def	information_schema	CHECK_CONSTRAINTS	CONSTRAINT_NAME	4	''	NO	varchar	64	192	NULL	NULL	NULL	utf8	utf8_general_ci	varchar(64)			select		NEVER	NULL
+def	information_schema	CHECK_CONSTRAINTS	CONSTRAINT_SCHEMA	2	''	NO	varchar	64	192	NULL	NULL	NULL	utf8	utf8_general_ci	varchar(64)			select		NEVER	NULL
+def	information_schema	CHECK_CONSTRAINTS	TABLE_NAME	3	''	NO	varchar	64	192	NULL	NULL	NULL	utf8	utf8_general_ci	varchar(64)			select		NEVER	NULL
 def	information_schema	CLIENT_STATISTICS	ACCESS_DENIED	22	0	NO	bigint	NULL	NULL	19	0	NULL	NULL	NULL	bigint(21)			select		NEVER	NULL
 def	information_schema	CLIENT_STATISTICS	BINLOG_BYTES_WRITTEN	9	0	NO	bigint	NULL	NULL	19	0	NULL	NULL	NULL	bigint(21)			select		NEVER	NULL
 def	information_schema	CLIENT_STATISTICS	BUSY_TIME	5	0	NO	double	NULL	NULL	21	NULL	NULL	NULL	NULL	double			select		NEVER	NULL
@@ -554,6 +559,11 @@ COL_CML	TABLE_SCHEMA	TABLE_NAME	COLUMN_NAME	DATA_TYPE	CHARACTER_MAXIMUM_LENGTH	C
 3.0000	information_schema	CHARACTER_SETS	DEFAULT_COLLATE_NAME	varchar	32	96	utf8	utf8_general_ci	varchar(32)
 3.0000	information_schema	CHARACTER_SETS	DESCRIPTION	varchar	60	180	utf8	utf8_general_ci	varchar(60)
 NULL	information_schema	CHARACTER_SETS	MAXLEN	bigint	NULL	NULL	NULL	NULL	bigint(3)
+3.0000	information_schema	CHECK_CONSTRAINTS	CONSTRAINT_CATALOG	varchar	512	1536	utf8	utf8_general_ci	varchar(512)
+3.0000	information_schema	CHECK_CONSTRAINTS	CONSTRAINT_SCHEMA	varchar	64	192	utf8	utf8_general_ci	varchar(64)
+3.0000	information_schema	CHECK_CONSTRAINTS	TABLE_NAME	varchar	64	192	utf8	utf8_general_ci	varchar(64)
+3.0000	information_schema	CHECK_CONSTRAINTS	CONSTRAINT_NAME	varchar	64	192	utf8	utf8_general_ci	varchar(64)
+3.0000	information_schema	CHECK_CONSTRAINTS	CHECK_CLAUSE	varchar	64	192	utf8	utf8_general_ci	varchar(64)
 3.0000	information_schema	CLIENT_STATISTICS	CLIENT	varchar	64	192	utf8	utf8_general_ci	varchar(64)
 NULL	information_schema	CLIENT_STATISTICS	TOTAL_CONNECTIONS	bigint	NULL	NULL	NULL	NULL	bigint(21)
 NULL	information_schema	CLIENT_STATISTICS	CONCURRENT_CONNECTIONS	bigint	NULL	NULL	NULL	NULL	bigint(21)

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

@@ -24,6 +24,11 @@ def	information_schema	CHARACTER_SETS	CHARACTER_SET_NAME	1	''	NO	varchar	32	96	N
 def	information_schema	CHARACTER_SETS	DEFAULT_COLLATE_NAME	2	''	NO	varchar	32	96	NULL	NULL	NULL	utf8	utf8_general_ci	varchar(32)					NEVER	NULL
 def	information_schema	CHARACTER_SETS	DESCRIPTION	3	''	NO	varchar	60	180	NULL	NULL	NULL	utf8	utf8_general_ci	varchar(60)					NEVER	NULL
 def	information_schema	CHARACTER_SETS	MAXLEN	4	0	NO	bigint	NULL	NULL	19	0	NULL	NULL	NULL	bigint(3)					NEVER	NULL
+def	information_schema	CHECK_CONSTRAINTS	CHECK_CLAUSE	5	''	NO	varchar	64	192	NULL	NULL	NULL	utf8	utf8_general_ci	varchar(64)					NEVER	NULL
+def	information_schema	CHECK_CONSTRAINTS	CONSTRAINT_CATALOG	1	''	NO	varchar	512	1536	NULL	NULL	NULL	utf8	utf8_general_ci	varchar(512)					NEVER	NULL
+def	information_schema	CHECK_CONSTRAINTS	CONSTRAINT_NAME	4	''	NO	varchar	64	192	NULL	NULL	NULL	utf8	utf8_general_ci	varchar(64)					NEVER	NULL
+def	information_schema	CHECK_CONSTRAINTS	CONSTRAINT_SCHEMA	2	''	NO	varchar	64	192	NULL	NULL	NULL	utf8	utf8_general_ci	varchar(64)					NEVER	NULL
+def	information_schema	CHECK_CONSTRAINTS	TABLE_NAME	3	''	NO	varchar	64	192	NULL	NULL	NULL	utf8	utf8_general_ci	varchar(64)					NEVER	NULL
 def	information_schema	CLIENT_STATISTICS	ACCESS_DENIED	22	0	NO	bigint	NULL	NULL	19	0	NULL	NULL	NULL	bigint(21)					NEVER	NULL
 def	information_schema	CLIENT_STATISTICS	BINLOG_BYTES_WRITTEN	9	0	NO	bigint	NULL	NULL	19	0	NULL	NULL	NULL	bigint(21)					NEVER	NULL
 def	information_schema	CLIENT_STATISTICS	BUSY_TIME	5	0	NO	double	NULL	NULL	21	NULL	NULL	NULL	NULL	double					NEVER	NULL
@@ -554,6 +559,11 @@ COL_CML	TABLE_SCHEMA	TABLE_NAME	COLUMN_NAME	DATA_TYPE	CHARACTER_MAXIMUM_LENGTH	C
 3.0000	information_schema	CHARACTER_SETS	DEFAULT_COLLATE_NAME	varchar	32	96	utf8	utf8_general_ci	varchar(32)
 3.0000	information_schema	CHARACTER_SETS	DESCRIPTION	varchar	60	180	utf8	utf8_general_ci	varchar(60)
 NULL	information_schema	CHARACTER_SETS	MAXLEN	bigint	NULL	NULL	NULL	NULL	bigint(3)
+3.0000	information_schema	CHECK_CONSTRAINTS	CONSTRAINT_CATALOG	varchar	512	1536	utf8	utf8_general_ci	varchar(512)
+3.0000	information_schema	CHECK_CONSTRAINTS	CONSTRAINT_SCHEMA	varchar	64	192	utf8	utf8_general_ci	varchar(64)
+3.0000	information_schema	CHECK_CONSTRAINTS	TABLE_NAME	varchar	64	192	utf8	utf8_general_ci	varchar(64)
+3.0000	information_schema	CHECK_CONSTRAINTS	CONSTRAINT_NAME	varchar	64	192	utf8	utf8_general_ci	varchar(64)
+3.0000	information_schema	CHECK_CONSTRAINTS	CHECK_CLAUSE	varchar	64	192	utf8	utf8_general_ci	varchar(64)
 3.0000	information_schema	CLIENT_STATISTICS	CLIENT	varchar	64	192	utf8	utf8_general_ci	varchar(64)
 NULL	information_schema	CLIENT_STATISTICS	TOTAL_CONNECTIONS	bigint	NULL	NULL	NULL	NULL	bigint(21)
 NULL	information_schema	CLIENT_STATISTICS	CONCURRENT_CONNECTIONS	bigint	NULL	NULL	NULL	NULL	bigint(21)

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

@@ -83,6 +83,29 @@ user_comment
 Separator	-----------------------------------------------------
 TABLE_CATALOG	def
 TABLE_SCHEMA	information_schema
+TABLE_NAME	CHECK_CONSTRAINTS
+TABLE_TYPE	SYSTEM VIEW
+ENGINE	MEMORY
+VERSION	11
+ROW_FORMAT	Fixed
+TABLE_ROWS	#TBLR#
+AVG_ROW_LENGTH	#ARL#
+DATA_LENGTH	#DL#
+MAX_DATA_LENGTH	#MDL#
+INDEX_LENGTH	#IL#
+DATA_FREE	#DF#
+AUTO_INCREMENT	NULL
+CREATE_TIME	#CRT#
+UPDATE_TIME	#UT#
+CHECK_TIME	#CT#
+TABLE_COLLATION	utf8_general_ci
+CHECKSUM	NULL
+CREATE_OPTIONS	#CO#
+TABLE_COMMENT	#TC#
+user_comment	
+Separator	-----------------------------------------------------
+TABLE_CATALOG	def
+TABLE_SCHEMA	information_schema
 TABLE_NAME	CLIENT_STATISTICS
 TABLE_TYPE	SYSTEM VIEW
 ENGINE	MEMORY
@@ -1019,6 +1042,29 @@ user_comment
 Separator	-----------------------------------------------------
 TABLE_CATALOG	def
 TABLE_SCHEMA	information_schema
+TABLE_NAME	CHECK_CONSTRAINTS
+TABLE_TYPE	SYSTEM VIEW
+ENGINE	MEMORY
+VERSION	11
+ROW_FORMAT	Fixed
+TABLE_ROWS	#TBLR#
+AVG_ROW_LENGTH	#ARL#
+DATA_LENGTH	#DL#
+MAX_DATA_LENGTH	#MDL#
+INDEX_LENGTH	#IL#
+DATA_FREE	#DF#
+AUTO_INCREMENT	NULL
+CREATE_TIME	#CRT#
+UPDATE_TIME	#UT#
+CHECK_TIME	#CT#
+TABLE_COLLATION	utf8_general_ci
+CHECKSUM	NULL
+CREATE_OPTIONS	#CO#
+TABLE_COMMENT	#TC#
+user_comment	
+Separator	-----------------------------------------------------
+TABLE_CATALOG	def
+TABLE_SCHEMA	information_schema
 TABLE_NAME	CLIENT_STATISTICS
 TABLE_TYPE	SYSTEM VIEW
 ENGINE	MEMORY

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

@@ -83,6 +83,29 @@ user_comment
 Separator	-----------------------------------------------------
 TABLE_CATALOG	def
 TABLE_SCHEMA	information_schema
+TABLE_NAME	CHECK_CONSTRAINTS
+TABLE_TYPE	SYSTEM VIEW
+ENGINE	MEMORY
+VERSION	11
+ROW_FORMAT	Fixed
+TABLE_ROWS	#TBLR#
+AVG_ROW_LENGTH	#ARL#
+DATA_LENGTH	#DL#
+MAX_DATA_LENGTH	#MDL#
+INDEX_LENGTH	#IL#
+DATA_FREE	#DF#
+AUTO_INCREMENT	NULL
+CREATE_TIME	#CRT#
+UPDATE_TIME	#UT#
+CHECK_TIME	#CT#
+TABLE_COLLATION	utf8_general_ci
+CHECKSUM	NULL
+CREATE_OPTIONS	#CO#
+TABLE_COMMENT	#TC#
+user_comment	
+Separator	-----------------------------------------------------
+TABLE_CATALOG	def
+TABLE_SCHEMA	information_schema
 TABLE_NAME	CLIENT_STATISTICS
 TABLE_TYPE	SYSTEM VIEW
 ENGINE	MEMORY
@@ -1019,6 +1042,29 @@ user_comment
 Separator	-----------------------------------------------------
 TABLE_CATALOG	def
 TABLE_SCHEMA	information_schema
+TABLE_NAME	CHECK_CONSTRAINTS
+TABLE_TYPE	SYSTEM VIEW
+ENGINE	MEMORY
+VERSION	11
+ROW_FORMAT	Fixed
+TABLE_ROWS	#TBLR#
+AVG_ROW_LENGTH	#ARL#
+DATA_LENGTH	#DL#
+MAX_DATA_LENGTH	#MDL#
+INDEX_LENGTH	#IL#
+DATA_FREE	#DF#
+AUTO_INCREMENT	NULL
+CREATE_TIME	#CRT#
+UPDATE_TIME	#UT#
+CHECK_TIME	#CT#
+TABLE_COLLATION	utf8_general_ci
+CHECKSUM	NULL
+CREATE_OPTIONS	#CO#
+TABLE_COMMENT	#TC#
+user_comment	
+Separator	-----------------------------------------------------
+TABLE_CATALOG	def
+TABLE_SCHEMA	information_schema
 TABLE_NAME	CLIENT_STATISTICS
 TABLE_TYPE	SYSTEM VIEW
 ENGINE	MEMORY

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

+--source include/have_innodb.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/t/information_schema-big.test

 # This test  uses grants, which can't get tested for embedded server
 -- source include/big_test.inc
 -- source include/not_embedded.inc
--- source include/have_xtradb.inc
+-- source include/have_innodb.inc
 
 # check that CSV engine was compiled in, as the result of the test depends
 # on the presence of the log tables (which are CSV-based).
 --source include/have_csv.inc
 
---disable_warnings
-DROP TABLE IF EXISTS t0,t1,t2,t3,t4,t5;
-DROP VIEW IF EXISTS v1;
---enable_warnings
-
-
 --echo #
 --echo # Bug#18925: subqueries with MIN/MAX functions on INFORMATION_SCHEMA 
 --echo #

sql/handler.h

@@ -721,6 +721,7 @@ enum enum_schema_tables
   SCH_ALL_PLUGINS,
   SCH_APPLICABLE_ROLES,
   SCH_CHARSETS,
+  SCH_CHECK_CONSTRAINTS,
   SCH_COLLATIONS,
   SCH_COLLATION_CHARACTER_SET_APPLICABILITY,
   SCH_COLUMNS,

sql/sql_show.cc

@@ -6468,6 +6468,40 @@ bool store_constraints(THD *thd, TABLE *table, LEX_STRING *db_name,
   return schema_table_store_record(thd, table);
 }
 
+static int get_check_constraints_record(THD *thd, TABLE_LIST *tables,
+                                        TABLE *table, bool res,
+                                        LEX_STRING *db_name,
+                                        LEX_STRING *table_name)
+{
+  DBUG_ENTER("get_check_constraints_record");
+  if(res)
+  {
+    if (thd->is_error())
+      push_warning(thd, Sql_condition::WARN_LEVEL_WARN,
+                   thd->get_stmt_da()->sql_errno(),
+                   thd->get_stmt_da()->message());
+      thd->clear_error();
+      DBUG_RETURN(0);
+  }
+  if(!tables->view)
+  {
+    StringBuffer<MAX_FIELD_WIDTH> str(system_charset_info);
+    for (uint i= 0; i < tables->table->s->table_check_constraints; i++)
+    {
+      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);
+      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(0);
+}
 
 static int get_schema_constraints_record(THD *thd, TABLE_LIST *tables,
 					 TABLE *table, bool res,
@@ -9283,6 +9317,15 @@ ST_FIELD_INFO spatial_ref_sys_fields_info[]=
 };
 #endif /*HAVE_SPATIAL*/
 
+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},
+  {"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 }
+};
 
 /*
   Description of ST_FIELD_INFO in table.h
@@ -9299,6 +9342,8 @@ 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},
   {"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,