35.18. constraint_column_usage
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 not-null constraint, this view identifies the column that the constraint is defined on.
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.
Column Type Description |
|---|
table_catalog Name of the database that contains the table that contains the column that is used by some constraint (always the current database) |
table_schema Name of the schema that contains the table that contains the column that is used by some constraint |
table_name Name of the table that contains the column that is used by some constraint |
column_name Name of the column that is used by some constraint |
constraint_catalog Name of the database that contains the constraint (always the current database) |
constraint_schema Name of the schema that contains the constraint |
constraint_name Name of the constraint |
: constraint_column_usage Columns