(PHP 4, PHP 5, PHP 7)
odbc_specialcolumns — Retrieves special columns
$connection_id
, int $type
, string $qualifier
, string $table
, int $scope
, int $nullable
) : resourceRetrieves either the optimal set of columns that uniquely identifies a row in the table, or columns that are automatically updated when any value in the row is updated by a transaction.
connection_idODBC 连接标识符，详见 odbc_connect()。
typeSQL_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.
qualifierThe qualifier.
tableThe table.
scopeThe scope, which orders the result set.
nullableThe nullable option.
Returns an ODBC result identifier or FALSE on
failure.
The result set has the following columns: