Retrieve statistics about a table

# odbc_statistics

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

odbc_statistics — Retrieve statistics about a table

### Description

odbc_statistics(
Odbc\Connection `$odbc`,
?string `$catalog`,
string `$schema`,
string `$table`,
int `$unique`,
int `$accuracy`
): Odbc\Result|false

Get statistics about a table and its indexes.

### Parameters

`odbc`

  The ODBC connection object, see odbc_connect() for details.

`catalog`

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

`schema`

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

`table`

  The table name.

`unique`

  The type of the index. One of `SQL_INDEX_UNIQUE` or `SQL_INDEX_ALL`.

`accuracy`

  One of `SQL_ENSURE` or `SQL_QUICK`. The latter requests that the driver retrieve the `CARDINALITY` and `PAGES` only if they are readily available from the server.

### Return Values

Returns an ODBC result object or `false` on failure.

The result set has the following columns:

- `TABLE_CAT`
- `TABLE_SCHEM`
- `TABLE_NAME`
- `NON_UNIQUE`
- `INDEX_QUALIFIER`
- `INDEX_NAME`
- `TYPE`
- `ORDINAL_POSITION`
- `COLUMN_NAME`
- `ASC_OR_DESC`
- `CARDINALITY`
- `PAGES`
- `FILTER_CONDITION`

Drivers can report additional columns.

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

### Changelog

Version | Description
--- | ---
8.4.0 | `odbc` expects an Odbc\Connection instance now; previously, a resource was expected.
8.4.0 | This function returns an Odbc\Result instance now; previously, a resource was returned.

### Examples

Example #1 List Statistics of a Table

`<?php
$conn = odbc_connect($dsn, $user, $pass);
$statistics = odbc_statistics($conn, 'TutorialDB', 'dbo', 'TEST', SQL_INDEX_UNIQUE, SQL_QUICK);
while (($row = odbc_fetch_array($statistics))) {
print_r($row);
break; // further rows omitted for brevity
}
?>`

The above example will output something similar to:

    Array
    (
        [TABLE_CAT] => TutorialDB
        [TABLE_SCHEM] => dbo
        [TABLE_NAME] => TEST
        [NON_UNIQUE] =>
        [INDEX_QUALIFIER] =>
        [INDEX_NAME] =>
        [TYPE] => 0
        [ORDINAL_POSITION] =>
        [COLUMN_NAME] =>
        [ASC_OR_DESC] =>
        [CARDINALITY] => 15
        [PAGES] => 3
        [FILTER_CONDITION] =>
    )

### See Also

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

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