information_schema.check_constraints.*| relation | column | mysql | mariadb | tidb | postgres | cockroachdb | mssql | |
|---|---|---|---|---|---|---|---|---|
check_constraints |
||||||||
check_clause |
LONGTEXT NOT NULL:
8
| LONGTEXT NOT NULL:
10.2-10.7
| unsupported | CHARACTER_DATA:
CHARACTER_DATA NULL:
| NVARCHAR(4000) NULL:
| |||
constraint_catalog |
VARCHAR NOT NULL:
8
| VARCHAR NOT NULL:
NULL:
| unsupported | SQL_IDENTIFIER:
SQL_IDENTIFIER NULL:
| NVARCHAR(128) NULL:
| |||
constraint_name |
VARCHAR NOT NULL:
8
| VARCHAR NOT NULL:
NULL:
| unsupported | SQL_IDENTIFIER:
SQL_IDENTIFIER NULL:
| SYSNAME NULL:
| |||
constraint_schema |
VARCHAR NOT NULL:
8
| VARCHAR NOT NULL:
NULL:
| unsupported | SQL_IDENTIFIER:
SQL_IDENTIFIER NULL:
| NVARCHAR(128) NULL:
| |||
level |
unsupported | VARCHAR NOT NULL:
10.5-10.7
| unsupported | unsupported | unsupported | unsupported | ||
table_name |
unsupported | VARCHAR NOT NULL:
NULL:
| unsupported | unsupported | unsupported | unsupported | ||