Get warnings from last operation

# Result::getWarnings

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Result::getWarnings — Get warnings from last operation

### 説明

public mysql_xdevapi\Result::getWarnings ( void ) : array

Retrieve warnings from the last Result operation.

### パラメータ

この関数にはパラメータはありません。

### 返り値

An array of Warning objects from the last operation. Each object defines an error 'message', error 'level', and error 'code'.

### 例

例1 mysql_xdevapi\RowResult::getWarnings() example

`<?php
$session = mysql_xdevapi\getSession("mysqlx://user:password@localhost");
$session->sql("CREATE DATABASE foo")->execute();
$session->sql("CREATE TABLE foo.test_table(x int)")->execute();
$schema = $session->getSchema("foo");
$table = $schema->getTable("test_table");
$table->insert(['x'])->values([1])->values([2])->execute();
$res = $table->select(['x/0 as bad_x'])->execute();
$warnings = $res->getWarnings();
print_r($warnings);
?>`

上の例の出力は、 たとえば以下のようになります。

    Array
    (
        [0] => mysql_xdevapi\Warning Object
            (
                [message] => Division by 0
                [level] => 2
                [code] => 1365
            )
        [1] => mysql_xdevapi\Warning Object
            (
                [message] => Division by 0
                [level] => 2
                [code] => 1365
            )
    )