Description
resource 
odbc_specialcolumns ( resource connection_id, int type, string qualifier, string owner, string table, int scope, int nullable )
     When the type argument is SQL_BEST_ROWID,
     odbc_specialcolumns() returns the
     column or columns that uniquely identify each row in the table.
    
     When the type argument is SQL_ROWVER, 
     odbc_specialcolumns() returns the column or columns in the
     specified table, if any, that are automatically updated by the data source
     when any value in the row is updated by any transaction.
    
     Returns an ODBC result identifier or FALSE on
     failure.
    
     The result set has the following columns:
     
SCOPE
COLUMN_NAME
DATA_TYPE
TYPE_NAME
PRECISION
LENGTH
SCALE
PSEUDO_COLUMN
    
     The result set is ordered by SCOPE.