修改jsonb的属性
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CREATE FUNCTION jsonb_merge(JSONB, JSONB)
RETURNS JSONB AS $$
WITH json_union AS (
SELECT * FROM JSONB_EACH($1)
UNION ALL
SELECT * FROM JSONB_EACH($2)
) SELECT JSON_OBJECT_AGG(key, value)::JSONB FROM json_union;
$$ LANGUAGE SQL;
UPDATE xxx SET data = jsonb_merge(data,‘{"b":3}‘) WHERE id = 1;
SELECT * FROM xxx;
id | data
----+------------------
1 | {"a": 1, "b": 3}
-- append
UPDATE xxx SET data = jsonb_merge(data,‘{"c":4}‘) WHERE id = 1;
SELECT * FROM xxx;
id | data
----+-------------------------
1 | {"a": 1, "b": 3, "c": 4}
CREATE FUNCTION jsonb_merge(JSONB, JSONB)
RETURNS JSONB AS $$
WITH json_union AS (
SELECT * FROM JSONB_EACH($1)
UNION ALL
SELECT * FROM JSONB_EACH($2)
) SELECT JSON_OBJECT_AGG(key, value)::JSONB
FROM json_union
WHERE key NOT IN (SELECT key FROM json_union WHERE value =‘null‘);
$$ LANGUAGE SQL;
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