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MDEV-14474 information_schema.check_constraints

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Implement according to standard SQL specification 2008.
The check_constraints table is used for fetching metadata about
the constraints defined for tables in all databases.
This commit is contained in:
Anel Husakovic 2018-04-03 12:41:13 +00:00 • committed by Vicențiu Ciorbaru
parent 7f73f5e4e5
commit d526679efd
9 changed files with 334 additions and 1 deletions
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2
mysql-test/main/information_schema.result
View file

@ -51,6 +51,7 @@ c
ALL_PLUGINS
APPLICABLE_ROLES
CHARACTER_SETS
CHECK_CONSTRAINTS
CLIENT_STATISTICS
COLLATIONS
COLLATION_CHARACTER_SET_APPLICABILITY
@ -938,6 +939,7 @@ 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

8
mysql-test/main/information_schema_all_engines.result
View file

@ -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 31

144
mysql-test/suite/funcs_1/r/is_check_constraints.result Normal file
View file

@ -0,0 +1,144 @@
#
# MDEV-14474: Create INFORMATION_SCHEMA.CHECK_CONSTRAINTS
#
set check_constraint_checks=1;
use test;
create table t0
(
t int, check (t>32) # table constraint
) ENGINE=myisam;
SELECT * from information_schema.check_constraints;
CONSTRAINT_CATALOG def
CONSTRAINT_SCHEMA test
CONSTRAINT_NAME CONSTRAINT_1
TABLE_NAME t0
CHECK_CLAUSE `t` > 32
ALTER TABLE t0
ADD CONSTRAINT CHK_t0_t CHECK(t<100);
SELECT * from information_schema.check_constraints;
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_t0_t
TABLE_NAME t0
CHECK_CLAUSE `t` < 100
ALTER TABLE t0
DROP CONSTRAINT CHK_t0_t;
SELECT * from information_schema.check_constraints;
CONSTRAINT_CATALOG def
CONSTRAINT_SCHEMA test
CONSTRAINT_NAME CONSTRAINT_1
TABLE_NAME t0
CHECK_CLAUSE `t` > 32
CREATE TABLE t1
( t int CHECK(t>2), # field constraint
tt int, CONSTRAINT CHK_tt CHECK(tt<100) # table constraint
) ENGINE=InnoDB;
SELECT * from information_schema.check_constraints;
CONSTRAINT_CATALOG def
CONSTRAINT_SCHEMA test
CONSTRAINT_NAME t
TABLE_NAME t1
CHECK_CLAUSE `t` > 2
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 CONSTRAINT_1
TABLE_NAME t0
CHECK_CLAUSE `t` > 32
ALTER TABLE t1
DROP CONSTRAINT CHK_tt;
SELECT * from information_schema.check_constraints;
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
(
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 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
ALTER TABLE t1
ADD CONSTRAINT CHK_new_ CHECK(t>tt);
SELECT * from information_schema.check_constraints;
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 CHK_new_
TABLE_NAME t1
CHECK_CLAUSE `t` > `tt`
CONSTRAINT_CATALOG def
CONSTRAINT_SCHEMA test
CONSTRAINT_NAME CONSTRAINT_1
TABLE_NAME t0
CHECK_CLAUSE `t` > 32
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 test b t3 `b` > 0
def test b t3 `b` > 10
def test name t2 char_length(`name`) > 2
def test CHK_dates t2 `start_date` is null
def test t t1 `t` > 2
def test CHK_new_ t1 `t` > `tt`
def test CONSTRAINT_1 t0 `t` > 32
drop table t0;
drop table t1;
drop table t2;
drop table t3;

10
mysql-test/suite/funcs_1/r/is_columns_is.result
View file

@ -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 3 '' 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 4 '' 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
@ -557,6 +562,11 @@ 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 CONSTRAINT_NAME 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 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)

50
mysql-test/suite/funcs_1/r/is_tables_is.result
View file

@ -89,6 +89,31 @@ 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#
MAX_INDEX_LENGTH #MIL#
TEMPORARY Y
user_comment
Separator -----------------------------------------------------
TABLE_CATALOG def
TABLE_SCHEMA information_schema
TABLE_NAME CLIENT_STATISTICS
TABLE_TYPE SYSTEM VIEW
ENGINE MEMORY
@ -1105,6 +1130,31 @@ 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#
MAX_INDEX_LENGTH #MIL#
TEMPORARY Y
user_comment
Separator -----------------------------------------------------
TABLE_CATALOG def
TABLE_SCHEMA information_schema
TABLE_NAME CLIENT_STATISTICS
TABLE_TYPE SYSTEM VIEW
ENGINE MEMORY

69
mysql-test/suite/funcs_1/t/is_check_constraints.test Normal file
View file

@ -0,0 +1,69 @@
--source include/have_innodb.inc
--echo #
--echo # MDEV-14474: Create INFORMATION_SCHEMA.CHECK_CONSTRAINTS
--echo #
set check_constraint_checks=1;
use test;
create table t0
(
t int, check (t>32) # table constraint
) ENGINE=myisam;
--vertical_results
SELECT * from information_schema.check_constraints;
ALTER TABLE t0
ADD CONSTRAINT CHK_t0_t CHECK(t<100);
SELECT * from information_schema.check_constraints;
ALTER TABLE t0
DROP CONSTRAINT CHK_t0_t;
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
) ENGINE=InnoDB;
SELECT * from information_schema.check_constraints;
ALTER TABLE t1
DROP CONSTRAINT CHK_tt;
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;
SELECT * from information_schema.check_constraints;
ALTER TABLE t1
ADD CONSTRAINT CHK_new_ CHECK(t>tt);
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;
--horizontal_results
select * from information_schema.check_constraints;
drop table t0;
drop table t1;
drop table t2;
drop table t3;

1
sql/handler.h
View file

@ -950,6 +950,7 @@ enum enum_schema_tables
SCH_ALL_PLUGINS,
SCH_APPLICABLE_ROLES,
SCH_CHARSETS,
SCH_CHECK_CONSTRAINTS,
SCH_COLLATIONS,
SCH_COLLATION_CHARACTER_SET_APPLICABILITY,
SCH_COLUMNS,

1
sql/sql_parse.cc
View file

@ -2565,6 +2565,7 @@ int prepare_schema_table(THD *thd, LEX *lex, Table_ident *table_ident,
case SCH_TABLE_NAMES:
case SCH_TABLES:
case SCH_CHECK_CONSTRAINTS:
case SCH_VIEWS:
case SCH_TRIGGERS:
case SCH_EVENTS:

50
sql/sql_show.cc
View file

@ -6788,6 +6788,42 @@ store_constraints(THD *thd, TABLE *table, const LEX_CSTRING *db_name,
return schema_table_store_record(thd, table);
}
static int get_check_constraints_record(THD *thd, TABLE_LIST *tables,
TABLE *table, bool res,
const LEX_CSTRING *db_name,
const LEX_CSTRING *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);
}
else if (!tables->view)
{
if (tables->table->s->table_check_constraints)
{
for (uint i= 0; i < tables->table->s->table_check_constraints; i++)
{
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);
}
}
}
DBUG_RETURN(res);
}
static int get_schema_constraints_record(THD *thd, TABLE_LIST *tables,
TABLE *table, bool res,
@ -9708,6 +9744,18 @@ 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},
{"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}
};
/*
Description of ST_FIELD_INFO in table.h
@ -9723,6 +9771,8 @@ 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,