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Note: The following description applies both to Postgres-XC and PostgreSQL if not described explicitly. You can read PostgreSQL as Postgres-XC except for version number, which is specific to each product.
The view view_column_usage identifies all columns that are used in the query expression of a view (the SELECT statement that defines the view). A column is only included if the table that contains the column is owned by a currently enabled role.
Note: Columns of system tables are not included. This should be fixed sometime.
Table 33-58. view_column_usage Columns
| Name | Data Type | Description |
|---|---|---|
| view_catalog | sql_identifier | Name of the database that contains the view (always the current database) |
| view_schema | sql_identifier | Name of the schema that contains the view |
| view_name | sql_identifier | Name of the view |
| table_catalog | sql_identifier | Name of the database that contains the table that contains the column that is used by the view (always the current database) |
| table_schema | sql_identifier | Name of the schema that contains the table that contains the column that is used by the view |
| table_name | sql_identifier | Name of the table that contains the column that is used by the view |
| column_name | sql_identifier | Name of the column that is used by the view |