odbc_specialcolumns
(PHP 4, PHP 5, PHP 7)
odbc_specialcolumns — Retrieves special columns
说明
odbc_specialcolumns (
resource
$connection_id ,
int $type ,
string $qualifier ,
string $table ,
int $scope ,
int $nullable ) :
resource
Retrieves 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.
参数
-
connection_id -
ODBC 连接标识符，详见 odbc_connect()。
-
type -
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 isSQL_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. -
qualifier -
The qualifier.
-
table -
The table.
-
scope -
The scope, which orders the result set.
-
nullable -
The nullable option.
返回值
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
