odbc_specialcolumns

    (PHP 4, PHP 5, PHP 7, PHP 8)

    odbc_specialcolumns — Retrieves special columns

    Опис

    odbc_specialcolumns(
        resource $odbc,
        int $type,
        ?string $catalog,
        string $schema,
        string $table,
        int $scope,
        int $nullable
    ): resource|false

    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.

    Параметри

    odbc

    Ідентифікатор з'єднання ODBC. Докладніше: 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.
    catalog

    Каталог ('qualifier' мовою ODBC 2).

    schema

    Схема ('owner' мовою ODBC 2).

    table

    The table.

    scope

    The scope, which orders the result set. One of SQL_SCOPE_CURROW, SQL_SCOPE_TRANSACTION or SQL_SCOPE_SESSION.

    nullable

    Determines whether to return special columns that can have a NULL value. One of SQL_NO_NULLS or SQL_NULLABLE.

    Значення, що повертаються

    Returns an ODBC result identifier or false on failure.

    The result set has the following columns:

    • SCOPE
    • COLUMN_NAME
    • DATA_TYPE
    • TYPE_NAME
    • COLUMN_SIZE
    • BUFFER_LENGTH
    • DECIMAL_DIGITS
    • PSEUDO_COLUMN
    Драйвер може оголошувати додаткові стовпці.

    The result set is ordered by SCOPE.

    Прогляньте також

    • odbc_tables() - Get the list of table names stored in a specific data source

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