JSONCompact

Documentación del formato JSONCompact

Entrada	Salida	Alias
✔	✔

​

Descripción

Se diferencia de JSON solo en que las filas de datos se muestran como arrays, no como objetos.

​

Ejemplo de uso

​

Insertar datos

Usa un archivo JSON con los siguientes datos, llamado football.json:

{
    "meta":
    [
        {
            "name": "date",
            "type": "Date"
        },
        {
            "name": "season",
            "type": "Int16"
        },
        {
            "name": "home_team",
            "type": "LowCardinality(String)"
        },
        {
            "name": "away_team",
            "type": "LowCardinality(String)"
        },
        {
            "name": "home_team_goals",
            "type": "Int8"
        },
        {
            "name": "away_team_goals",
            "type": "Int8"
        }
    ],
    "data":
    [
        ["2022-04-30", 2021, "Sutton United", "Bradford City", 1, 4],
        ["2022-04-30", 2021, "Swindon Town", "Barrow", 2, 1],
        ["2022-04-30", 2021, "Tranmere Rovers", "Oldham Athletic", 2, 0],
        ["2022-05-02", 2021, "Port Vale", "Newport County", 1, 2],
        ["2022-05-02", 2021, "Salford City", "Mansfield Town", 2, 2],
        ["2022-05-07", 2021, "Barrow", "Northampton Town", 1, 3],
        ["2022-05-07", 2021, "Bradford City", "Carlisle United", 2, 0],
        ["2022-05-07", 2021, "Bristol Rovers", "Scunthorpe United", 7, 0],
        ["2022-05-07", 2021, "Exeter City", "Port Vale", 0, 1],
        ["2022-05-07", 2021, "Harrogate Town A.F.C.", "Sutton United", 0, 2],
        ["2022-05-07", 2021, "Hartlepool United", "Colchester United", 0, 2],
        ["2022-05-07", 2021, "Leyton Orient", "Tranmere Rovers", 0, 1],
        ["2022-05-07", 2021, "Mansfield Town", "Forest Green Rovers", 2, 2],
        ["2022-05-07", 2021, "Newport County", "Rochdale", 0, 2],
        ["2022-05-07", 2021, "Oldham Athletic", "Crawley Town", 3, 3],
        ["2022-05-07", 2021, "Stevenage Borough", "Salford City", 4, 2],
        ["2022-05-07", 2021, "Walsall", "Swindon Town", 0, 3]
    ]
}

Inserte los datos:

INSERT INTO football FROM INFILE 'football.json' FORMAT JSONCompact;

​

Lectura de datos

Lea los datos con el formato JSONCompact:

SELECT *
FROM football
FORMAT JSONCompact

La salida estará en formato JSON:

{
    "meta":
    [
        {
            "name": "date",
            "type": "Date"
        },
        {
            "name": "season",
            "type": "Int16"
        },
        {
            "name": "home_team",
            "type": "LowCardinality(String)"
        },
        {
            "name": "away_team",
            "type": "LowCardinality(String)"
        },
        {
            "name": "home_team_goals",
            "type": "Int8"
        },
        {
            "name": "away_team_goals",
            "type": "Int8"
        }
    ],

    "data":
    [
        ["2022-04-30", 2021, "Sutton United", "Bradford City", 1, 4],
        ["2022-04-30", 2021, "Swindon Town", "Barrow", 2, 1],
        ["2022-04-30", 2021, "Tranmere Rovers", "Oldham Athletic", 2, 0],
        ["2022-05-02", 2021, "Port Vale", "Newport County", 1, 2],
        ["2022-05-02", 2021, "Salford City", "Mansfield Town", 2, 2],
        ["2022-05-07", 2021, "Barrow", "Northampton Town", 1, 3],
        ["2022-05-07", 2021, "Bradford City", "Carlisle United", 2, 0],
        ["2022-05-07", 2021, "Bristol Rovers", "Scunthorpe United", 7, 0],
        ["2022-05-07", 2021, "Exeter City", "Port Vale", 0, 1],
        ["2022-05-07", 2021, "Harrogate Town A.F.C.", "Sutton United", 0, 2],
        ["2022-05-07", 2021, "Hartlepool United", "Colchester United", 0, 2],
        ["2022-05-07", 2021, "Leyton Orient", "Tranmere Rovers", 0, 1],
        ["2022-05-07", 2021, "Mansfield Town", "Forest Green Rovers", 2, 2],
        ["2022-05-07", 2021, "Newport County", "Rochdale", 0, 2],
        ["2022-05-07", 2021, "Oldham Athletic", "Crawley Town", 3, 3],
        ["2022-05-07", 2021, "Stevenage Borough", "Salford City", 4, 2],
        ["2022-05-07", 2021, "Walsall", "Swindon Town", 0, 3]
    ],

    "rows": 17,

    "statistics":
    {
        "elapsed": 0.223690876,
        "rows_read": 0,
        "bytes_read": 0
    }
}

​

Ajustes de formato