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: The ODBC connection identifier, see odbc_connect() for details.
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