[英]Adding elements in the end to a json array of objects in Oracle
I have a json column named "configuration" in an Oracle database with a data like-我在 Oracle 数据库中有一个名为“configuration”的 json 列,其数据如下 -
{"sections":[{"active":true,"code":"page.about"},{"active":true,"code":"page.title"}...]}
How can add elements to the "sections" array inside the CLOB?如何向 CLOB 内的“sections”数组添加元素? for example, add this object to the CLOB- {"active":false, "code":"page.body"}
例如,将此对象添加到 CLOB- {"active":false, "code":"page.body"}
I tried to do this-我试图这样做-
UPDATE *TABLE_NAME*
SET configuration = JSON_MODIFY(configuration, 'append $.sections',JSON_QUERY(N'{"active":false,"code":"page.body"}'))
but I got this error- Error report - SQL Error: ORA-00917: missing comma 00917. 00000 - "missing comma" *Cause:但我收到了这个错误 - 错误报告 - SQL 错误:ORA-00917:缺少逗号 00917。00000 - “缺少逗号” *原因:
*Action: *行动:
Thanks!谢谢!
You can create the function:您可以创建函数:
CREATE FUNCTION json_append_array(
json IN CLOB,
path IN VARCHAR2,
value IN CLOB
) RETURN CLOB
IS
j_obj JSON_OBJECT_T := JSON_OBJECT_T(json);
j_arr JSON_ARRAY_T := j_obj.get_Array(path);
BEGIN
j_arr.append( JSON_OBJECT_T(value) );
RETURN j_obj.to_Clob();
END;
/
Then you can update the table:然后你可以更新表:
UPDATE TABLE_NAME
SET configuration = JSON_APPEND_ARRAY(
configuration,
'sections',
'{"active":false,"code":"page.body"}'
);
Then:然后:
SELECT *
FROM table_name;
Outputs:输出:
CONFIGURATION 配置
{"sections":[{"active":true,"code":"page.about"},{"active":true,"code":"page.title"},{"active":false,"code":"page.body"}]} {"sections":[{"active":true,"code":"page.about"},{"active":true,"code":"page.title"},{"active":false,"代码":"page.body"}]}
You can split the array into rows the use UNION ALL
to add another row and re-aggregate and use JSON_MERGEPATCH
to update the object:您可以将数组拆分为行,使用
UNION ALL
添加另一行并重新聚合并使用JSON_MERGEPATCH
更新对象:
MERGE INTO table_name dst
USING (
SELECT t.ROWID AS rid,
a.new_value
FROM table_name t
CROSS JOIN LATERAL (
SELECT JSON_OBJECT(
KEY 'sections' VALUE JSON_ARRAYAGG(value FORMAT JSON)
) AS new_value
FROM (
SELECT value
FROM JSON_TABLE(
t.configuration,
'$.sections[*]'
COLUMNS value CLOB FORMAT JSON PATH '$'
)
UNION ALL
SELECT EMPTY_CLOB() || '{"active":false,"code":"page.body"}' FROM DUAL
)
) a
) src
ON (dst.ROWID = src.rid)
WHEN MATCHED THEN
UPDATE
SET configuration = JSON_MERGEPATCH(dst.configuration, src.new_value);
Which, for the sample data:其中,对于样本数据:
CREATE TABLE table_name (configuration CLOB CHECK (configuration IS JSON));
INSERT INTO table_name ( configuration )
VALUES ('{"sections":[{"active":true,"code":"page.about"},{"active":true,"code":"page.title"}]}');
Then, after the merge statement:然后,在合并语句之后:
SELECT *
FROM table_name;
Outputs:输出:
CONFIGURATION 配置
{"sections":[{"active":true,"code":"page.about"},{"active":true,"code":"page.title"},{"active":false,"code":"page.body"}]} {"sections":[{"active":true,"code":"page.about"},{"active":true,"code":"page.title"},{"active":false,"代码":"page.body"}]}
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