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1.创建示例表
create temp table settings as select ‘{"west": [ {"id": "aa92f346-7a93-4443-949b-4eab0badd983", "version": 1}, {"id": "cd92e346-6b04-3456-050a-5eeb0bddd027", "version": 3} ]}‘::jsonb as value;
2.如下保留version=1的数据， 如果把where (j->>‘version‘)::int = 1改为where (j->>‘version‘)::int <> 1 则进行删除操作
update settings set value = jsonb_set(value, ‘{west}‘, jsonb_build_array(ARRAY(select j from (SELECT jsonb_array_elements(value->‘west‘) j from settings ) as b where (j->>‘version‘)::int = 1)))
参考资料：
http://stackoverflow.com/questions/38640168/find-position-of-object-in-postgres-jsonb-array
http://dba.stackexchange.com/questions/54283/how-to-turn-json-array-into-postgres-array
Postgresql Jsonb字段内含数组属性的删除元素操作
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原文地址：http://www.cnblogs.com/MonkChen/p/5882615.html
