`information_schema.table_constraints.table_schema`

mysql

type: VARCHAR NOT NULL

5.7-8

type: NULL

Note:

Database name.

5.1-10.8

type: VARCHAR NOT NULL

Note:

Database name.

type: VARCHAR(64) NULL

4-6.1

type: SQL_IDENTIFIER NULL

Note:

Name of the schema that contains the table

10-15

type: SQL_IDENTIFIER

Note:

Name of the schema that contains the table

7.4-9.6

type: unknown

Note:

Name of the schema containing the constrained table.

2-21.2

Note:

Name of the database that contains the constrained table.

1-1.1

type: NVARCHAR(128) NULL

Note:

Name of schema that contains the table. ** Important ** only reliable way to find the schema of a object is to query the sys.objects catalog view.