ChartDataAdhocMetricSchema

{
    "aggregate": "AVG",
    "column": {
        "column_name": "mycol",
        "type": "BIGINT"
    },
    "expressionType": "SIMPLE",
    "hasCustomLabel": true,
    "label": "Weighted observations",
    "optionName": "metric_aec60732-fac0-4b17-b736-93f1a5c93e30",
    "sqlExpression": "SUM(weight * observations) / SUM(weight)"
}