我有一个带有jsonb列的表，该表返回我以下对象。
[
{
"ele_llist": [
726,
144,
976,
144,
976,
225,
726,
225
],
"sgtc": 1,
"text_detail_list": {
"alt_ele_list": [
[
726,
203,
833,
203,
833,
224,
726,
223
],
[
786,
144,
917,
144,
917,
182,
786,
182
],
[
835,
210,
972,
211,
972,
225,
835,
224
],
[
842,
182,
976,
182,
976,
205,
842,
205
]
],
"sfc": [
0,
0,
0,
0
],
"sgtc": [
1,
1,
1,
1
],
"pname": [
"GOLDEN oy",
"gallne",
"OSETTY EESTAUEA",
"AIsoR"
],
"poidc": [
0.9,
0.9,
0.9,
0.9
]
},
"sfc": 0,
"did": "hC5qbBF2IO0.2018-11-13_17-14-19.0",
"poidc": 0.9,
"pname": "GOLDEN oy gallne OSETTY EESTAUEA AIsoR"
},
{
"ele_llist": [
543,
26,
697,
26,
697,
57,
543,
57
],
"sgtc": 1,
"text_detail_list": {
"alt_ele_list": [
[
543,
34,
696,
26,
697,
49,
544,
57
]
],
"sfc": [
0
],
"sgtc": [
1
],
"pname": [
"mloachomgrprgren"
],
"poidc": [
0.45
]
},
"sfc": 0,
"did": "hC5qbBF2IO0.2018-11-13_17-14-19.0",
"poidc": 0.45,
"pname": "mloachomgrprgren"
},
{
"ele_llist": [
1037,
96,
1127,
96,
1127,
128,
1037,
128
],
"sgtc": 1,
"text_detail_list": {
"alt_ele_list": [
[
1037,
96,
1127,
96,
1127,
128,
1037,
128
]
],
"sfc": [
0
],
"sgtc": [
1
],
"pname": [
"LD"
],
"poidc": [
0.45
]
},
"sfc": 0,
"did": "hC5qbBF2IO0.2018-11-13_17-14-19.1",
"poidc": 0.45,
"pname": "LD"
},
{
"ele_llist": [
538,
25,
699,
25,
699,
58,
538,
58
],
"sgtc": 1,
"text_detail_list": {
"alt_ele_list": [
[
538,
34,
698,
25,
699,
49,
539,
58
]
],
"sfc": [
0
],
"sgtc": [
1
],
"pname": [
"a@lokomgrergimi"
],
"poidc": [
0.45
]
},
"sfc": 0,
"did": "hC5qbBF2IO0.2018-11-13_17-14-19.1",
"poidc": 0.45,
"pname": "a@lokomgrergimi"
},
{
"ele_llist": [
729,
145,
993,
145,
993,
229,
729,
229
],
"sgtc": 1,
"text_detail_list": {
"alt_ele_list": [
[
729,
202,
993,
209,
993,
229,
729,
223
],
[
843,
183,
980,
184,
980,
207,
843,
206
],
[
792,
146,
918,
145,
918,
178,
792,
179
]
],
"sfc": [
0,
0,
0
],
"sgtc": [
1,
1,
1
],
"pname": [
"GOLDON ory OSETTY ESTAUEANT",
"AIENISORSSA",
"gal"
],
"poidc": [
0.9,
0.9,
0.9
]
},
"sfc": 0,
"did": "hC5qbBF2IO0.2018-11-13_17-14-19.1",
"poidc": 0.9,
"pname": "GOLDON ory OSETTY ESTAUEANT AIENISORSSA gal"
}
]
我想访问内部text_detail_list，我可以使用以下查询来访问它
select obj->'text_detail_list'->'pname'->0 as "pname" from
ele_tbl, json_array_elements(ele_json) obj
在这里，我需要以数字形式提供0、1、2..。是否可以通过其他方法不使用数字计数器来获取子元素？
答案 0 :(得分：0)
是的，您可以在提取的jsonb数组上再次应用func saveToCloud(record: String, recordType: String, recordTypeField: String, reference: CKRecord?, referenceType: String?) {
let zoneID = CKRecordZone.ID(zoneName: Zone.test, ownerName: CKRecordZone.ID.default.ownerName)
let recordID = CKRecord.ID(recordName: UUID().uuidString, zoneID: zoneID)
let newRecord = CKRecord(recordType: recordType, recordID: recordID)
if let reference = reference, let referenceType = referenceType {
let newReference = CKRecord.Reference(record: reference, action: .none)
newRecord[referenceType] = newReference
}
newRecord[recordTypeField] = record
database.save(newRecord) { (_,error) in
if let err = error as? CKError {
print("ERROR =" , err.userInfo )
}
}
}
。
jsonb_array_elements_text输出
select jsonb_array_elements_text(obj->'text_detail_list'->'pname')
as pname
from ele_tbl cross join lateral
jsonb_array_elements(ele_json) obj
如果要为每个提取的组分配ID，请在 pname |
:-------------------------- |
GOLDEN oy |
gallne |
OSETTY EESTAUEA |
AIsoR |
mloachomgrprgren |
LD |
a@lokomgrergimi |
GOLDON ory OSETTY ESTAUEANT |
AIENISORSSA |
gal |
子句中使用with ordinality。
FROM输出
select j.id,j.elem FROM
(
select obj->'text_detail_list'->'pname' as pname_array
from ele_tbl cross join lateral
jsonb_array_elements(ele_json) obj
)s cross join lateral jsonb_array_elements_text(pname_array)
with ordinality as j(id,elem)