使用以下方式筛选源的行级数据 Flow Service API

IMPORTANT
目前,仅对以下源支持筛选行级数据:

本教程提供了有关如何使用为源筛选行级数据的步骤。 Flow Service API.

快速入门

本教程要求您实际了解Adobe Experience Platform的以下组件:

  • : Experience Platform 允许从各种源摄取数据,同时让您能够使用以下内容构建、标记和增强传入数据: Platform 服务。
  • 沙盒: Experience Platform 提供对单个文件夹进行分区的虚拟沙盒 Platform 将实例安装到单独的虚拟环境中,以帮助开发和改进数字体验应用程序。

使用平台API

有关如何成功调用Platform API的信息,请参阅 Platform API快速入门.

筛选源数据

下面概述了为筛选源的行级数据而采取的步骤。

查找连接规范

在使用API筛选源的行级数据之前,必须首先检索源的连接规范详细信息,以确定特定源支持的运算符和语言。

GET要检索给定源的连接规范,请向 /connectionSpecs 的端点 Flow Service API,同时提供源的属性名称作为查询参数的一部分。

API格式

GET /connectionSpecs/{QUERY_PARAMS}
参数
描述
{QUERY_PARAMS}
用于筛选结果的可选查询参数。 您可以检索 Google BigQuery 连接规范,应用 name 属性和指定 "google-big-query" 在搜索中。

请求

以下请求检索的连接规范 Google BigQuery.

curl -X GET \
  'https://platform.adobe.io/data/foundation/flowservice/connectionSpecs?property=name=="google-big-query"' \
  -H 'Authorization: Bearer {ACCESS_TOKEN}' \
  -H 'x-api-key: {API_KEY}' \
  -H 'x-gw-ims-org-id: {ORG_ID}' \
  -H 'x-sandbox-name: {SANDBOX_NAME}'

响应

成功的响应将返回的连接规范 Google BigQuery,包括其支持的查询语言和逻辑运算符的信息。

NOTE
为简短起见,以下API响应被截断。
"attributes": {
  "filterAtSource": {
    "enabled": true,
    "queryLanguage": "SQL",
    "logicalOperators": [
      "and",
      "or",
      "not"
    ],
    "comparisonOperators": [
      "=",
      "!=",
      "<",
      "<=",
      ">",
      ">=",
      "like",
      "in"
    ],
    "columnNameEscapeChar": "`",
    "valueEscapeChar": "'"
  }
属性
描述
attributes.filterAtSource.enabled
确定查询的源是否支持对行级数据进行筛选。
attributes.filterAtSource.queryLanguage
确定查询源支持的查询语言。
attributes.filterAtSource.logicalOperators
确定可用于为源筛选行级数据的逻辑运算符。
attributes.filterAtSource.comparisonOperators
确定可用于筛选源行级数据的比较运算符。 有关比较运算符的更多信息,请参阅下表。
attributes.filterAtSource.columnNameEscapeChar
确定用于转义列的字符。
attributes.filterAtSource.valueEscapeChar
确定在编写SQL查询时如何包围值。

比较运算符

操作员
描述
==
按属性是否等于提供的值筛选。
!=
按属性是否不等于提供的值筛选。
<
根据属性是否小于提供的值来进行筛选。
>
按属性是否大于提供的值筛选。
<=
根据属性是否小于或等于提供的值来进行筛选。
>=
按属性是否大于或等于提供的值筛选。
like
在中使用的筛选器 WHERE 用于搜索指定模式的子句。
in
按属性是否在指定范围内进行筛选。

指定摄取的筛选条件

在确定了源支持的逻辑运算符和查询语言后,可以使用配置文件查询语言(PQL)指定要应用于源数据的过滤条件。

在下面的示例中,条件仅应用于与作为参数列出的节点类型所提供的值相等的数据。

{
  "type": "PQL",
  "format": "pql/json",
  "value": {
    "nodeType": "fnApply",
    "fnName": "=",
    "params": [
      {
        "nodeType": "fieldLookup",
        "fieldName": "city"
      },
      {
        "nodeType": "literal",
        "value": "DDN"
      }
    ]
  }
}

预览数据

您可以通过向以下网站发出GET请求来预览数据: /explore 的端点 Flow Service API,同时提供 filters 作为查询参数的一部分并在中指定PQL输入条件 Base64.

API格式

GET /connections/{BASE_CONNECTION_ID}/explore?objectType=table&object={TABLE_PATH}&preview=true&filters={FILTERS}
参数
描述
{BASE_CONNECTION_ID}
源的基本连接ID。
{TABLE_PATH}
要检查的表的path属性。
{FILTERS}
您编码的PQL过滤条件 Base64.

请求

curl -X GET \
  'https://platform.adobe.io/data/foundation/flowservice/connections/89d1459e-3cd0-4069-acb3-68f240db4eeb/explore?objectType=table&object=TESTFAS.FASTABLE&preview=true&filters=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\' \
  -H 'Authorization: Bearer {ACCESS_TOKEN}' \
  -H 'x-api-key: {API_KEY}' \
  -H 'x-gw-ims-org-id: {IMS_ORG}' \
  -H 'x-sandbox-name: {SANDBOX_NAME}'

响应

成功的请求会返回以下响应。

{
  "format": "flat",
  "schema": {
    "columns": [
      {
        "name": "FIRSTNAME",
        "type": "string",
        "xdm": {
          "type": "string"
        }
      },
      {
        "name": "LASTNAME",
        "type": "string",
        "xdm": {
          "type": "string"
        }
      },
      {
        "name": "CITY",
        "type": "string",
        "xdm": {
          "type": "string"
        }
      },
      {
        "name": "AGE",
        "type": "string",
        "xdm": {
          "type": "string"
        }
      },
      {
        "name": "HEIGHT",
        "type": "string",
        "xdm": {
          "type": "string"
        }
      },
      {
        "name": "ISEMPLOYED",
        "type": "boolean",
        "xdm": {
          "type": "boolean"
        }
      },
      {
        "name": "POSTG",
        "type": "boolean",
        "xdm": {
          "type": "boolean"
        }
      },
      {
        "name": "LATITUDE",
        "type": "double",
        "xdm": {
          "type": "number"
        }
      },
      {
        "name": "LONGITUDE",
        "type": "double",
        "xdm": {
          "type": "number"
        }
      },
      {
        "name": "JOINEDDATE",
        "type": "string",
        "meta:xdmType": "date-time",
        "xdm": {
          "type": "string",
          "format": "date-time"
        }
      },
      {
        "name": "CREATEDAT",
        "type": "string",
        "meta:xdmType": "date-time",
        "xdm": {
          "type": "string",
          "format": "date-time"
        }
      },
      {
        "name": "CREATEDATTS",
        "type": "string",
        "meta:xdmType": "date-time",
        "xdm": {
          "type": "string",
          "format": "date-time"
        }
      }
    ]
  },
 "data": [
    {
        "CITY": "MZN",
        "LASTNAME": "Jain",
        "JOINEDDATE": "2022-06-22T00:00:00",
        "LONGITUDE": 1000.222,
        "CREATEDAT": "2022-06-22T17:19:33",
        "FIRSTNAME": "Shivam",
        "POSTG": true,
        "HEIGHT": "169",
        "CREATEDATTS": "2022-06-22T17:19:33",
        "ISEMPLOYED": true,
        "LATITUDE": 2000.89,
        "AGE": "25"
    },
    {
        "CITY": "MUM",
        "LASTNAME": "Kreet",
        "JOINEDDATE": "2022-09-07T00:00:00",
        "LONGITUDE": 10500.01,
        "CREATEDAT": "2022-09-07T17:19:33",
        "FIRSTNAME": "Rakul",
        "POSTG": true,
        "HEIGHT": "155",
        "CREATEDATTS": "2022-09-07T17:19:33",
        "ISEMPLOYED": false,
        "LATITUDE": 2500.89,
        "AGE": "42"
    },
    {
        "CITY": "MAN",
        "LASTNAME": "Lee",
        "JOINEDDATE": "2022-09-14T00:00:00",
        "LONGITUDE": 1000.222,
        "CREATEDAT": "2022-09-14T05:02:33",
        "FIRSTNAME": "Denzel",
        "POSTG": true,
        "HEIGHT": "185",
        "CREATEDATTS": "2022-09-14T05:02:33",
        "ISEMPLOYED": true,
        "LATITUDE": 123.89,
        "AGE": "16"
    }
  ]
}

为过滤的数据创建源连接

要创建源连接并摄取过滤的数据,请向发出POST请求 /sourceConnections 端点,同时将筛选条件作为正文参数的一部分提供。

API格式

POST /sourceConnections

请求

以下请求创建一个源连接以从中摄取数据 test1.fasTestTable 位置 city = DDN.

curl -X POST \
  'https://platform.adobe.io/data/foundation/flowservice/sourceConnections' \
  -H 'Authorization: Bearer {ACCESS_TOKEN}' \
  -H 'x-api-key: {API_KEY}' \
  -H 'x-gw-ims-org-id: {ORG_ID}' \
  -H 'x-sandbox-name: {SANDBOX_NAME}' \
  -H 'Content-Type: application/json' \
  -d '{
      "name": "BigQuery Source Connection",
      "description": "Source Connection for Filter test",
      "baseConnectionId": "89d1459e-3cd0-4069-acb3-68f240db4eeb",
      "data": {
        "format": "tabular"
      },
      "params": {
        "tableName": "test1.fasTestTable",
        "filters": {
          "type": "PQL",
          "format": "pql/json",
          "value": {
            "nodeType": "fnApply",
            "fnName": "=",
            "params": [
              {
                "nodeType": "fieldLookup",
                "fieldName": "city"
              },
              {
                "nodeType": "literal",
                "value": "DDN"
              }
            ]
          }
        }
      },
      "connectionSpec": {
        "id": "3c9b37f8-13a6-43d8-bad3-b863b941fedd",
        "version": "1.0"
      }
    }'

响应

成功的响应将返回唯一标识符(id)。

{
    "id": "b7581b59-c603-4df1-a689-d23d7ac440f3",
    "etag": "\"ef05d265-0000-0200-0000-6019e0080000\""
}

附录

本节提供了用于筛选的不同有效负载的进一步示例。

奇异条件

您可以省略初始的 fnApply 适用于只需要一个条件的方案。

{
  "type": "PQL",
  "format": "pql/json",
  "value": {
    "nodeType": "fnApply",
    "fnName": "like",
    "params": [
      {
        "nodeType": "fieldLookup",
        "fieldName": "firstname"
      },
      {
        "nodeType": "literal",
        "value": "%s"
      }
    ]
  }
}

使用 in 运算符

有关运算符的示例,请参阅下面的有效负载示例 in.

{
  "type": "PQL",
  "format": "pql/json",
  "value": {
    "nodeType": "fnApply",
    "fnName": "and",
    "params": [
      {
        "nodeType": "fnApply",
        "fnName": "in",
        "params": [
          {
            "nodeType": "fieldLookup",
            "fieldName": "firstname"
          },
          {
            "nodeType": "literal",
            "value": [
              "Ramen",
              "John"
            ]
          }
        ]
      }
    ]
  }
}

使用 isNull 运算符

有关运算符的示例,请参阅下面的有效负载示例 isNull.

{
  "type": "PQL",
  "format": "pql/json",
  "value": {
    "nodeType": "fnApply",
    "fnName": "isNull",
    "params": [
      {
        "nodeType": "fieldLookup",
        "fieldName": "complaint_type"
      }
    ]
  }
}

使用 NOT 运算符

有关运算符的示例,请参阅下面的有效负载示例 NOT.

{
  "type": "PQL",
  "format": "pql/json",
  "value": {
    "nodeType": "fnApply",
    "fnName": "NOT",
    "params": [
      {
        "nodeType": "fnApply",
        "fnName": "isNull",
        "params": [
          {
            "nodeType": "fieldLookup",
            "fieldName": "complaint_type"
          }
        ]
      }
    ]
  }
}

嵌套条件的示例

有关复杂嵌套条件的示例,请参阅下面的有效负荷示例。

{
  "type": "PQL",
  "format": "pql/json",
  "value": {
    "nodeType": "fnApply",
    "fnName": "and",
    "params": [
      {
        "nodeType": "fnApply",
        "fnName": ">=",
        "params": [
          {
            "nodeType": "fieldLookup",
            "fieldName": "age"
          },
          {
            "nodeType": "literal",
            "value": 20
          }
        ]
      },
      {
        "nodeType": "fnApply",
        "fnName": "<=",
        "params": [
          {
            "nodeType": "fieldLookup",
            "fieldName": "age"
          },
          {
            "nodeType": "literal",
            "value": 30
          }
        ]
      },
      {
        "nodeType": "fnApply",
        "fnName": "or",
        "params": [
          {
            "nodeType": "fnApply",
            "fnName": "!=",
            "params": [
              {
                "nodeType": "fieldLookup",
                "fieldName": "city"
              },
              {
                "nodeType": "literal",
                "value": "PUD"
              }
            ]
          },
          {
            "nodeType": "fnApply",
            "fnName": "=",
            "params": [
              {
                "nodeType": "fieldLookup",
                "fieldName": "joinedDate"
              },
              {
                "nodeType": "literal",
                "value": "2020-04-22"
              }
            ]
          }
        ]
      }
    ]
  }
}
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