The UNICOM Intelligence JDBC Driver supports the following metadata:

Retrieves a description of table columns available in the specified catalog. Only column descriptions matching the catalog, schema, table and column name criteria are returned. The results are ordered by TABLE_CAT, TABLE_SCHEM, TABLE_NAME, and ORDINAL_POSITION.

The JDBC driver ignores all parameters and returns all columns. The driver returns all fields in VDATA, HDATA, array objects, and grid objects. The field name can be used in SQL.

Retrieves the available database schema names. The results are ordered by TABLE_CATALOG and TABLE_SCHEM.

Retrieves a description of the tables available in the given catalog. Only table descriptions matching the catalog, schema, table name, and type criteria are returned. The results ordered by TABLE_TYPE, TABLE_CAT, TABLE_SCHEM, and TABLE_NAME.

The JDBC driver ignores all parameters and returns all tables.

Retrieves a description of all the supported database data types. The results are ordered by DATA_TYPE and then by how closely the data type maps to the corresponding JDBC SQL type.

If the database supports SQL distinct types, then getTypeInfo() will return a single row with a TYPE_NAME of DISTINCT and a DATA_TYPE of TYPES.DISTINCT. If the database supports SQL structured types, then getTypeInfo() returns a single row with a TYPE_NAME of STRUCT and a DATA_TYPE of Types.STRUCT. If SQL distinct or structured types are supported, then information on the individual types can be obtained from the getUDTs() method.