I hope you found this helpful I regularly refer to this sample code, especially when I need to parse the JSON from a new web service. L_ship_date : = convert_iso_date (p_date = > l_order_obj.get_String( 'ship_date')) ĭbms_output.put_line( ' : ' | |TO_CHAR(l_ship_date, 'DD-MON-YYYY HH24:MI:SS TZH:TZM')) ĭbms_output.put_line( ' : N/A') Check if the optional field 'ship_date' exists The following code will raise an error if the ship_date field is missing for an order. has function should not raise an error in this case. If I enable error handling, then the line IF l_order_obj.has('ship_date') THEN raises an error. For example, in the sample JSON, ship_date is not always present for an order. This is because you cannot code around missing fields if you enable error handling. In the example code above, you will notice that I disabled error handling for the orders object using l_orders_obj.On_error(0). See the 'Error Handling' section of the documentation for details. The dataguide allows developers to generate and query metadata that describes the JSON documents they have stored in Oracle Database. Customers who are licensed for the Oracle Database In-Memory option will be able to use its capabilities to accelerate SQL queries over JSON content. Oracle allows you to enable error handling using the On_error function. Integration with Oracle Database In-Memory. : Important Co Order Lines : 1 : 1 : R2-D2 Error Handling for JSON_OBJECT_T The excerpt below shows the output from the above code for the first two orders only. The sample SELECT statement below selects all three levels of the JSON document in a flat structure. This method is well suited for parsing JSON documents with a primary array that you need to loop through and does not require complex calculations or calls out to other PL/SQL functions and procedures. I suggest you download it as it will be helpful when reviewing the rest of this post. I uploaded the sample JSON to OCI Object Storage to easily access it from my sample code. I have included comments in the sample code to explain important aspects.The sample JSON and sample code are designed to illustrate as many different aspects of JSON parsing as possible.From a PL/SQL program using JSON_OBJECT_T.In this post, I will use a sample JSON document and demonstrate two methods for parsing it: If you are like me, you learn best by following examples. In Oracle Database 19c we can can create an on-statement-refreshable materialized view over a jsontable(). There are many occasions, however, where you need to parse and consume JSON directly from SQL or PL/SQL. In order to search an array via jsonexists, in Oracle Database 21c we can create a multi-value functional index. When I can, I use APEX REST Data Sources or the APEX_DATA_PARSER PL/SQL API to turn JSON into rows of data that can be easily consumed by APEX. As an Oracle APEX developer, I regularly consume JSON from external web services.
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