Get column count

# RowResult::getColumnsCount

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RowResult::getColumnsCount — Get column count

### 说明

public function mysql_xdevapi\RowResult::getColumnsCount(): int

Retrieve the column count for columns present in the result set.

### 参数

此函数没有参数。

### 返回值

The number of columns; 0 if there are none.

### 更新日志

版本 | 说明
--- | ---
8.0.14 | Method renamed from getColumnCount() to getColumnsCount().

### 示例

示例 #1 mysql_xdevapi\RowResult::getColumnsCount() example

    <?php
    $session = mysql_xdevapi\getSession("mysqlx://user:password@localhost");

    $session->sql("DROP DATABASE addressbook")->execute();
    $session->sql("CREATE DATABASE foo")->execute();
    $session->sql("CREATE TABLE foo.test_table(x int)")->execute();
    $session->sql("INSERT INTO addressbook.names values ('John', 42), ('Sam', 33)")->execute();

    $sql = $session->sql("SELECT * from addressbook.names")->execute();

    echo $sql->getColumnsCount();

以上示例的输出类似于：

    2

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