Import people, objects, and relationships from an Amazon Redshift database. Use Google Forms or Jotforms with Zapier.Getting conclusive results from A/B tests.Find messages using the Message Library.Send data from Customer.io to Salesforce, Highrise or another CRM.How do I add an avatar/logo to my emails?.Adapting MailChimp's Two-Column template.Resources for templates, code, and best practices.Troubleshooting Your Drag-and-Drop Emails.Verify deliverable email addresses with Kickbox.Authenticating for Apple Private Email Relay.Use Drafts to deliver error-free messages.Why did my campaign not send someone a message?.Enable Time Zone Match in 10 Minutes with Clearbit.Campaign for new subscribers with Stripe.Making changes to campaigns and broadcasts.Campaigns, Broadcasts, and Transactional Messages. Setting Up Segments for Specific Purposes.Why don't people match 'within the past X days' conditions?.Getting Started: Objects vs Collections.How do I know what data I have available?.Deleting People and Suppressing Profile IDs.Set preferences outside of the subscription center.Multi-language support for the subscription center.How do I create multiple subscription types?.What's the Last Visited field, and how do I use it?.This mapping role of JSONPaths files is depicted in the following diagram to make it more clear. Therefore, to be able to load the custom data successfully, the JSONPaths file should list (locate) all the expected parameters sent with a specific event/context and its order should match the corresponding order of the Redshift table. In other words, the position of the element (within the list of elements) will point to the Redshift field as it was created with CREATE TABLE command. Thus, the mapping on the other side of the JSONPaths file is done by means of the element order. Again, the order does not matter in the JSON source data, but the order of the JSONPaths file expressions must match the column order. If the JSON data objects don’t correspond directly to column names, you can use a JSONPaths file to map the JSON elements to columns. As mentioned earlier, it is not trivial as the name of the field does not necessarily match the name of the JSON’s element. Once the element got located we need to know which Redshift field it has to go to. Thus, in dot notation (which Snowplow adheres to), the child element version_app of the parent data as in precedes or follows "schema": "iglu:com.acme/context/jsonschema/1-0-0". Since a JSON structure is usually anonymous and doesn’t necessarily have a “root member object” JSONPath assumes the abstract name $ assigned to the outer level object. JSONPaths expressions always refer to a JSON structure in the same way as XPath expression are used in combination with an XML document. That is the JSONPath allows to locate an element within the JSON. The way to think of JSONPath is they are like XPath for XML document. In the Amazon Redshift COPY syntax, a JSONPath expression specifies the explicit path to a single name element in a JSON hierarchical data structure, using either bracket notation or dot notation. A JSONPaths file is a text file that contains a single JSON object with the name “jsonpaths” paired with an array of JSONPath expressions… Let’s take a look how Amazon describes JSONPaths:ĬOPY uses a JSONPaths file to parse the JSON source data. Thus, JSONPaths files play a mapping role providing a match between the parameters (keys) in the JSON and the Redshift fields. The reason is the key/value pairs in the JSONs could be “assembled” in different order as well as the names of the keys in it might not match the names of the fields in the related Redshift table. JSONPaths files are the means by which this action becomes possible. To load the data presented in such a form, we utilize Redshift’s COPY FROM JSON command. The custom self-describing (unstructured) events and contexts are sent as JSONs. Incorrect handling of JSONPaths leads to a few confusions resulting in either wrong data populating the wrong Redshift fields or not getting there at all. Even though the topic is not Snowplow specific nonetheless it plays a significant part in ability to build extensible event model. We receive a considerable amount of questions related to JSONPaths files.
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