constraint_column_usage

33.13. constraint_column_usage

The view constraint_column_usage identifies all columns in the current database that are used by some constraint. Only those columns are shown that are contained in a table owned by a currently enabled role. For a check constraint, this view identifies the columns that are used in the check expression. For a foreign key constraint, this view identifies the columns that the foreign key references. For a unique or primary key constraint, this view identifies the constrained columns.

Table 33-11. constraint_column_usage Columns

NameData TypeDescription
table_catalogsql_identifier Name of the database that contains the table that contains the column that is used by some constraint (always the current database)
table_schemasql_identifier Name of the schema that contains the table that contains the column that is used by some constraint
table_namesql_identifier Name of the table that contains the column that is used by some constraint
column_namesql_identifier Name of the column that is used by some constraint
constraint_catalogsql_identifierName of the database that contains the constraint (always the current database)
constraint_schemasql_identifierName of the schema that contains the constraint
constraint_namesql_identifierName of the constraint

Back to top

(С) Виктор Вислобоков, 2008-2010