在 Postgres JSONB 字段中全局替换

Globally replace in Postgres JSONB field

我需要全局替换嵌套 JSON 结构中多个位置出现的特定字符串,该字符串在 postgres table 中存储为 jsonb。例如:

{
  "location": "tmp/config",
  "alternate_location": {
    "name": "config",
    "location": "tmp/config"
  }
}

...应该变成:

{
  "location": "tmp/new_config",
  "alternate_location": {
    "name": "config",
    "location": "tmp/new_config"
  }
}

我试过:

UPDATE files SET meta_data = to_json(replace(data::TEXT, 'tmp/config', 'tmp/new_config'));

不幸的是,这会导致格式错误 JSON,带有三重转义引号。

知道怎么做吗?

使用简单的转换为 jsonb 而不是 to_json(),例如:

with files(meta_data) as (
values(
'{
  "location": "tmp/config",
  "alternate_location": {
    "name": "config",
    "location": "tmp/config"
  }
}'::jsonb)
)

select replace(meta_data::text, 'tmp/config', 'tmp/new_config')::jsonb
from files;

                                                replace                                                 
--------------------------------------------------------------------------------------------------------
 {"location": "tmp/new_config", "alternate_location": {"name": "config", "location": "tmp/new_config"}}
(1 row)

使用更新:

UPDATE files SET meta_data = replace(data::TEXT, 'tmp/config', 'tmp/new_config')::jsonb;