使用 PostgreSQL 删除 NESTED JSONB 数组中的对象

Delete objects inside NESTED JSONB arrays with PostgreSQL

json请求:

INSERT INTO test.demotbl (data)
VALUES ('{
    "x1": "Americas",
    "x2": "West",
    "x3": [{
        "x_id": "sam"
    }],
    "x4": {
        "a1": true,
        "a2": false,
        "a3": [
            "xx",
            "xx"
        ],
        "a4": [
            "Josh"
        ],
        "y1": [{
                "id": "RW",
                "z2": true,
                "z3": "USER",
                "z4": [{
                    "name": "john"
                }]
            },
             {
                "id": "RO",
                "z2": false,
                "z3": "SELECT",
                "z4": [{
                    "name": "salin"
                }
            {
                "id": "DBA",
                "z2": false,
                "z3": "SELECT",
                "z4": [{
                    "name": "Samule"
                }]
            }
        ]
    }
}'::jsonb)

问题 1:如何从 y1 数组中删除 "id":"RO" 的数组值? y1 json数组中可以没有任何元素我想根据id条件删除数组值。

如何从 y1 数组中删除 "id":"RO" 的数组值? y1 json数组中可以没有任何元素我想根据id条件删除数组值。

删除后的预期输出:

{
    "x1": "Americas",
    "x2": "West",
    "x3": [{
        "x_id": "sam"
    }],
    "x4": {
        "a1": true,
        "a2": false,
        "a3": [
            "xx",
            "xx"
        ],
        "a4": [
            "Josh"
        ],
        "y1": [{
                "id": "RW",
                "z2": true,
                "z3": "USER",
                "z4": [{
                    "name": "john"
                }]
            },

            {
                "id": "DBA",
                "z2": false,
                "z3": "SELECT",
                "z4": [{
                    "name": "Samule"
                }]
            }
        ]
    }
}

问题 2:如何只从 y1 数组中删除 "id":"RO"

预期输出:

{
    "x1": "Americas",
    "x2": "West",
    "x3": [{
        "x_id": "sam"
    }],
    "x4": {
        "a1": true,
        "a2": false,
        "a3": [
            "xx",
            "xx"
        ],
        "a4": [
            "Josh"
        ],
        "y1": [{
                "id": "RW",
                "z2": true,
                "z3": "USER",
                "z4": [{
                    "name": "john"
                }]
            },
             {
                "z2": false,
                "z3": "SELECT",
                "z4": [{
                    "name": "salin"
                }
            {
                "id": "DBA",
                "z2": false,
                "z3": "SELECT",
                "z4": [{
                    "name": "Samule"
                }]
            }
        ]
    }
}

编辑说明:我误解了这个问题。以为您想删除包含 'RO' 的整个对象。我编辑了答案以便删除 id。

您提供的jsonb对象有一个小错误。它应该看起来像这样:

{
    "x1": "Americas",
    "x2": "West",
    "x3": [{
        "x_id": "sam"
    }],
    "x4": {
        "a1": true,
        "a2": false,
        "a3": [
            "xx",
            "xx"
        ],
        "a4": [
            "Josh"
        ],
        "y1": [{
                "id": "RW",
                "z2": true,
                "z3": "USER",
                "z4": [{
                    "name": "john"
                }]
            },
             {
                "id": "RO",
                "z2": false,
                "z3": "SELECT",
                "z4": [{
                    "name": "salin"
                }]
            },
            {
                "id": "DBA",
                "z2": false,
                "z3": "SELECT",
                "z4": [{
                    "name": "Samule"
                }]
            }
        ]
    }
}

话虽如此,这应该可行,但请记住 - 这将替换工作 table 中的所有条目。 jsonb 对象在 "field".

字段中
with zd as (select ('{x4,y1,'||index-1||',id}')::text[] as path
            from table
            ,jsonb_array_elements((field->>'x4')::jsonb->'y1') 
            with ordinality arr(x,index)
            where x->>'id'='RO'
        )
        update table set field=
        field #- zd.path 
        from zd

此致,
比亚尼