# maxdb_info

# maxdb::info

(PECL maxdb >= 1.0)

maxdb_info -- maxdb::info — Retrieves information about the most recently executed query

### 说明

过程化风格

maxdb_info ( resource `$link` ) : string

面向对象风格

string $maxdb->info;

The maxdb_info() function returns a string providing information about the last query executed. The nature of this string is provided below:

Possible maxdb_info return values
Query type | Example result string
--- | ---
INSERT INTO...SELECT... | Records: 100 Duplicates: 0 Warnings: 0
INSERT INTO...VALUES (...),(...),(...) | Records: 3 Duplicates: 0 Warnings: 0
LOAD DATA INFILE ... | Records: 1 Deleted: 0 Skipped: 0 Warnings: 0
ALTER TABLE ... | Records: 3 Duplicates: 0 Warnings: 0
UPDATE ... | Rows matched: 40 Changed: 40 Warnings: 0

> Note:

> Queries which do not fall into one of the above formats are not supported. In these situations, maxdb_info() will return an empty string.

### 返回值

A character string representing additional information about the most recently executed query.

### 范例

Example #1 面向对象风格

    <?php
    $maxdb = new maxdb("localhost", "MONA", "RED", "DEMODB");

    /* check connection */
    if (maxdb_connect_errno()) {
       printf("Connect failed: %s\n", maxdb_connect_error());
       exit();
    }

    $maxdb->query("CREATE TABLE temp.t1 LIKE hotel.city");

    /* INSERT INTO .. SELECT */
    $maxdb->query("INSERT INTO temp.t1 SELECT * FROM hotel.city");
    printf("%s\n", $maxdb->info);

    /* close connection */
    $maxdb->close();
    ?>

Example #2 过程化风格

    <?php
    $link = maxdb_connect("localhost", "MONA", "RED", "DEMODB");

    /* check connection */
    if (maxdb_connect_errno()) {
       printf("Connect failed: %s\n", maxdb_connect_error());
       exit();
    }

    maxdb_query($link, "CREATE TABLE temp.t1 LIKE hotel.city");

    /* INSERT INTO .. SELECT */
    maxdb_query($link, "INSERT INTO temp.t1 SELECT * FROM hotel.city");
    printf("%s\n", maxdb_info($link));

    /* close connection */
    maxdb_close($link);
    ?>

以上例程的输出类似于：

    Records: 25 Duplicates: 0 Warnings: 0

### 参见

- maxdb_affected_rows() - Gets the number of affected rows in a previous MaxDB operation
- maxdb_warning_count() - Returns the number of warnings from the last query for the given link
- maxdb_num_rows() - Gets the number of rows in a result