如何使用SQL查询访问JSON对象列表或数组中的字段

Question

Consider the following table

+-------------+--------------------------------------------------------------------------+
|company_name |                         products                                         |   
+-------------+--------------------------------------------------------------------------+
|   comp1     | [{"name": "prod1","pending": false}, {"name": "prod2","pending": true}]  |
+-------------+--------------------------------------------------------------------------+

Suppose I want to retrieve results based on the the value of "name" field inside "products" column, for ex: if "pending" = "true", then display the company_name and also the product name of the particular JSON object inside the List or Array.

Result should look something like,

+-------------+-------------------------------+
|company_name |           product_name        |
+-------------+-------------------------------+
| comp1       |            prod2              | 
+-------------+-------------------------------+

Answer 1

您应该使用python，perl等程序来检索json并将其转换为array，然后打印所需的array列。

Answer 2

use index to get value $[ index ]

Code will be like this:

Select company_name,json_extract(products,'$[1].name') product_name from table where json_extract(products,'$[1].pending')='false' ;

Note: create a dummy table with numbers and join it for index