db2_special_columns Returns a result set listing the unique row identifier columns for a table &reftitle.description; resourcedb2_special_columns resourceconnection stringqualifier stringschema stringtable_name intscope Returns a result set listing the unique row identifier columns for a table. &reftitle.parameters; connection A valid connection to an IBM DB2, Cloudscape, or Apache Derby database. qualifier A qualifier for DB2 databases running on OS/390 or z/OS servers. For other databases, pass &null; or an empty string. schema The schema which contains the tables. table_name The name of the table. scope Integer value representing the minimum duration for which the unique row identifier is valid. This can be one of the following values: Integer value SQL constant Description 0 SQL_SCOPE_CURROW Row identifier is valid only while the cursor is positioned on the row. 1 SQL_SCOPE_TRANSACTION Row identifier is valid for the duration of the transaction. 2 SQL_SCOPE_SESSION Row identifier is valid for the duration of the connection. &reftitle.returnvalues; Returns a statement resource with a result set containing rows with unique row identifier information for a table. The rows are composed of the following columns: Column name Description SCOPE Integer value SQL constant Description 0 SQL_SCOPE_CURROW Row identifier is valid only while the cursor is positioned on the row. 1 SQL_SCOPE_TRANSACTION Row identifier is valid for the duration of the transaction. 2 SQL_SCOPE_SESSION Row identifier is valid for the duration of the connection. COLUMN_NAME Name of the unique column. DATA_TYPE SQL data type for the column. TYPE_NAME Character string representation of the SQL data type for the column. COLUMN_SIZE An integer value representing the size of the column. BUFFER_LENGTH Maximum number of bytes necessary to store data from this column. DECIMAL_DIGITS The scale of the column, or &null; where scale is not applicable. NUM_PREC_RADIX An integer value of either 10 (representing an exact numeric data type), 2 (representing an approximate numeric data type), or &null; (representing a data type for which radix is not applicable). PSEUDO_COLUMN Always returns 1. &reftitle.seealso; db2_column_privileges db2_columns db2_foreign_keys db2_primary_keys db2_procedure_columns db2_procedures db2_statistics db2_table_privileges db2_tables