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MySQL 外壳 8.0

5.7.4 JSON格式输出

MySQL Shell 提供了许多 JSON 格式选项来打印结果集：

json或者json/pretty

这些选项都可以生成漂亮的 JSON。

ndjson或者json/raw

这些选项都生成由换行符分隔的原始 JSON。

json/array

此选项生成包装在 JSON 数组中的原始 JSON。

您可以通过使用命令行选项启动 MySQL Shell 或设置 MySQL Shell 配置选项 来选择这些输出格式 。 --result-format=valueresultFormat

在批处理模式下，为了帮助将 MySQL Shell 与外部工具集成，您可以--json 在从命令行启动 MySQL Shell 时使用该选项来控制所有输出的 JSON 包装。当打开 JSON 包装时，MySQL Shell 生成漂亮打印的 JSON（默认）或原始 JSON，并且 resultFormat忽略 MySQL Shell 配置选项的值。有关说明，请参阅 第 5.7.5 节，“JSON 包装”。

示例 5.4 以漂亮打印的 JSON 格式输出（json或 json/pretty）

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MySQL  localhost:33060+ ssl  world_x  JS > shell.options.set('resultFormat','json')
MySQL  localhost:33060+ ssl  world_x  JS > session.sql("select * from city where countrycode='AUT'")
{
    "ID": 1523,
    "Name": "Wien",
    "CountryCode": "AUT",
    "District": "Wien",
    "Info": {
        "Population": 1608144
    }
}
{
    "ID": 1524,
    "Name": "Graz",
    "CountryCode": "AUT",
    "District": "Steiermark",
    "Info": {
        "Population": 240967
    }
}
{
    "ID": 1525,
    "Name": "Linz",
    "CountryCode": "AUT",
    "District": "North Austria",
    "Info": {
        "Population": 188022
    }
}
{
    "ID": 1526,
    "Name": "Salzburg",
    "CountryCode": "AUT",
    "District": "Salzburg",
    "Info": {
        "Population": 144247
    }
}
{
    "ID": 1527,
    "Name": "Innsbruck",
    "CountryCode": "AUT",
    "District": "Tiroli",
    "Info": {
        "Population": 111752
    }
}
{
    "ID": 1528,
    "Name": "Klagenfurt",
    "CountryCode": "AUT",
    "District": "Kärnten",
    "Info": {
        "Population": 91141
    }
}
6 rows in set (0.0031 sec)

示例 5.5 以带有换行符（ndjson或json/raw）的原始 JSON 格式输出

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MySQL  localhost:33060+ ssl  world_x  JS > shell.options.set('resultFormat','ndjson')
MySQL  localhost:33060+ ssl  world_x  JS > session.sql("select * from city where countrycode='AUT'")
{"ID":1523,"Name":"Wien","CountryCode":"AUT","District":"Wien","Info":{"Population":1608144}}
{"ID":1524,"Name":"Graz","CountryCode":"AUT","District":"Steiermark","Info":{"Population":240967}}
{"ID":1525,"Name":"Linz","CountryCode":"AUT","District":"North Austria","Info":{"Population":188022}}
{"ID":1526,"Name":"Salzburg","CountryCode":"AUT","District":"Salzburg","Info":{"Population":144247}}
{"ID":1527,"Name":"Innsbruck","CountryCode":"AUT","District":"Tiroli","Info":{"Population":111752}}
{"ID":1528,"Name":"Klagenfurt","CountryCode":"AUT","District":"Kärnten","Info":{"Population":91141}}
6 rows in set (0.0032 sec)

示例 5.6 以原始 JSON 格式包装在 JSON 数组 ( json/array)中的输出

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MySQL  localhost:33060+ ssl  world_x  JS > shell.options.set('resultFormat','json/array')
MySQL  localhost:33060+ ssl  world_x  JS > session.sql("select * from city where countrycode='AUT'")
[
{"ID":1523,"Name":"Wien","CountryCode":"AUT","District":"Wien","Info":{"Population":1608144}},
{"ID":1524,"Name":"Graz","CountryCode":"AUT","District":"Steiermark","Info":{"Population":240967}},
{"ID":1525,"Name":"Linz","CountryCode":"AUT","District":"North Austria","Info":{"Population":188022}},
{"ID":1526,"Name":"Salzburg","CountryCode":"AUT","District":"Salzburg","Info":{"Population":144247}},
{"ID":1527,"Name":"Innsbruck","CountryCode":"AUT","District":"Tiroli","Info":{"Population":111752}},
{"ID":1528,"Name":"Klagenfurt","CountryCode":"AUT","District":"Kärnten","Info":{"Population":91141}}
]
6 rows in set (0.0032 sec)