odbc_statistics()

(PHP 4, PHP 5, PHP 7)

Retrieve statistics about a table

说明

odbc_statistics(resource $connection_id,string $qualifier,string $owner,string $table_name,int $unique,int $accuracy): resource

Get statistics about a table and its indexes.

参数

$connection_id: ODBC 连接标识符，详见odbc_connect()。
$qualifier: The qualifier.
$owner: The owner.
$table_name: The table name.
$unique: The unique attribute.
$accuracy: The accuracy.

返回值

Returns an ODBC result identifier 或者在失败时返回FALSE.

The result set has the following columns:

TABLE_QUALIFIER
TABLE_OWNER
TABLE_NAME
NON_UNIQUE
INDEX_QUALIFIER
INDEX_NAME
TYPE
SEQ_IN_INDEX
COLUMN_NAME
COLLATION
CARDINALITY
PAGES
FILTER_CONDITION

The result set is ordered by NON_UNIQUE, TYPE, INDEX_QUALIFIER, INDEX_NAME and SEQ_IN_INDEX.

A couple of the function parameters are undefined:
unique - determines whether you want to return just unique indexes or all indexes. Use SQL_INDEX_UNIQUE or SQL_INDEX_ALL for this parameter
accuracy - whether you wan to return everything there is to know about the table or just what information is readily available. Use SQL_ENSURE or SQL_QUICK for this parameter
For a bit more info about this function see the ODBC function SQLStatistics() at http://msdn.microsoft.com/en-us/library/ms711022(v=vs.85).aspx