odbc_specialcolumns
(PHP 4, PHP 5)
odbc_specialcolumns — Retrieves special columns
说明
resource odbc_specialcolumns ( resource $connection_id , int $type , string $qualifier , string $owner , string $table , int $scope , int $nullable )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 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.
- qualifier
-
The qualifier.
- owner
-
The owner.
- 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
