从oracle中的json维度数组中获取值

Question

我有以下 JSON，我需要从中获取 issuedIdentValue 的值，其中 issuedIdentType = PANCARD

{
    "issuedIdent": [ 
        {"issuedIdentType":"DriversLicense","issuedIdentValue":"9797979797979797"},
        {"issuedIdentType":"SclSctyNb","issuedIdentValue":"078-01-8877"},
        {"issuedIdentType":"PANCARD","issuedIdentValue":"078-01-8877"}
    ]
}

我无法在下面的查询中对索引值 [2] 进行硬编码，因为这些记录的顺序可以更改。所以想摆脱任何硬编码的索引。

select json_value(
    '{"issuedIdent": [{"issuedIdentType":"DriversLicense","issuedIdentValue":"9797979797979797"},{"issuedIdentType":"SclSctyNb","issuedIdentValue":"078-01-8877"},  {"issuedIdentType":"PANCARDSctyNb","issuedIdentValue":"078-01-8877"}]}', 
    '$.issuedIdent[2].issuedIdentValue'
) as output 
from d1entzendev.ExternalEventLog 
where 
    eventname = 'CustomerDetailsInqSVC' 
    and applname = 'digitalBANKING' 
    and requid = '4fe1fa1b-abd4-47cf-834b-858332c31618';

需要对 json_value 函数进行哪些更改才能达到预期结果

Answer 1

在 Oracle 12c 或更高版本中，您可以为此使用 JSON_TABLE()：

select value
from json_table(
    '{"issuedIdent": [{"issuedIdentType":"DriversLicense","issuedIdentValue":"9797979797979797"},{"issuedIdentType":"SclSctyNb","issuedIdentValue":"078-01-8877"},  {"issuedIdentType":"PANCARD","issuedIdentValue":"078-01-8877"}]}',
    '$.issuedIdent[*]' columns
         type   varchar(50) path '$.issuedIdentType',
         value  varchar(50) path '$.issuedIdentValue'
) t
where type = 'PANCARD'

This returns：

|价值 | | :------------ | | 078-01-8877 |