odbc_specialcolumns

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

odbc_specialcolumns — Retrieves special columns

说明

odbc_specialcolumns(
    Odbc\Connection $odbc,
    int $type,
    ?string $catalog,
    string $schema,
    string $table,
    int $scope,
    int $nullable
): Odbc\Result|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.

参数

odbc

ODBC 连接对象，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.
catalog

The catalog ('qualifier' in ODBC 2 parlance).

schema

The schema ('owner' in ODBC 2 parlance).

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.

返回值

返回 ODBC 结果对象 或者在失败时返回 false。

The result set has the following columns:

  • SCOPE
  • COLUMN_NAME
  • DATA_TYPE
  • TYPE_NAME
  • COLUMN_SIZE
  • BUFFER_LENGTH
  • DECIMAL_DIGITS
  • PSEUDO_COLUMN
Drivers can report additional columns.

The result set is ordered by SCOPE.

更新日志

版本 说明
8.4.0 odbc 现在需要 Odbc\Connection 实例；之前需要 resource。
8.4.0 此函数现在返回 Odbc\Result 实例；之前返回 resource。

参见

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

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