plv8存储过程与jsonb类型

时间:2014-08-21 18:26:31

标签: postgresql plv8 postgresql-9.4

这可能为时过早,postgres 9.4仍处于测试阶段。我一直在试验jsonb类型。我没有运气将jsonb类型传递给plv8函数,它以类型字符串形式出现。我想知道我做错了吗?

create or replace function jt ( o json ) returns integer language plv8 immutable
AS $function$
        plv8.elog(INFO, 'type is ', typeof o);
        plv8.elog(INFO, 'argument is ', o);
        plv8.elog(INFO, 'member is ', o['member']);
$function$;

create or replace function jt ( o jsonb ) returns integer language plv8 immutable
AS $function$
        plv8.elog(INFO, 'type is ', typeof o);
        plv8.elog(INFO, 'argument is ', o);
        plv8.elog(INFO, 'member is ', o['member']);
$function$;

然后,当我使用json运行时:

psql=# select jt('{"member":"test"}'::json);
INFO:  type is  object
INFO:  argument is  [object Object]
INFO:  member is  test

但是,当我用jsonb运行时:

psql=# select jt('{"member":"test"}'::jsonb);
INFO:  type is  string
INFO:  argument is  {"member": "test"}
INFO:  member is  undefined

-g

1 个答案:

答案 0 :(得分:5)

PL / V8需要​​在此之前添加对JSONB的支持。

同时你仍然可以通过普通json;只需将jsonb投射到json