QueryAggregateExpression 查询聚合函数

1. 结构声明

TS Declaration

class QueryAggregateExpression extends LogicItem {
    asName: string;
    aggregateName: 'COUNT' | 'COUNTD' | 'SUM' | 'AVG' | 'MAX' | 'MIN';
    aggregateParam: QueryFieldExpression;
}

JSON Schema

{
    "type": "object",
    "properties": {
        "label": {
            "type": "string"
        },
        "description": {
            "type": "string"
        },
        "folded": {
            "type": "boolean"
        },
        "offsetX": {
            "type": "number"
        },
        "offsetY": {
            "type": "number"
        },
        "asName": {
            "type": "string"
        },
        "aggregateName": {
            "type": "string",
            "enum": [
                "COUNT",
                "COUNTD",
                "SUM",
                "AVG",
                "MAX",
                "MIN"
            ]
        },
        "aggregateParam": {
            "$ref": "#/definitions/QueryFieldExpression"
        }
    },
    "required": [
        "asName",
        "aggregateName",
        "aggregateParam"
    ],
    "additionalProperties": false
}

2. 节点示例

(1) 示例

AST 如下：

JSON

{
    "concept": "QueryAggregateExpression",
    "aggregateName": "SUM",
    "aggregateParam": {
        "concept": "QueryFieldExpression",
        "isDotStar": false,
        "entityAsName": "OrderProduct",
        "propertyName": "amount",
        "asName": ""
    },
    "asName": "totalAmount"
}

YAML

concept: QueryAggregateExpression
aggregateName: SUM
aggregateParam:
  concept: QueryFieldExpression
  isDotStar: false
  entityAsName: OrderProduct
  propertyName: amount
  asName: ""
asName: totalAmount