if (tableName == null)
throw new IllegalArgumentException("tableName cannot be null.");
DBAdapter dba = DBAdapterFactory.getInstance().getAdapter(connName);
String[] s3 = dba.resolveCatalogAndSchemaAndTable(connName, tableName);
String catalog = s3[0];
String schema = s3[1];
String table = s3[2];
PrimaryKey pk = DBStore.getInstance().getPrimaryKey(connName, catalog, schema, table);