在Postgres中查询JSON [英] Query JSON in Postgres
问题描述
我在postgres数据库中有一些JSON,它在一个名为 site_content
的表中,该表有两行, id
和内容
,位于内容
中是我存储我的JSON的地方。我希望能够找到一名玩家,因为这是从JSON创建我的图表所需的关键,我的玩家被存储在系列
系列的关键字下。
以下是我目前使用的查询:
Blocking。获取{
sql.firstRow(SELECT * from site_content where content - >'playersContainer' - >'series' - >'id'= $ {id})
} .map {row - >
log.info(row is:$ {row})
if(row){
objectMapper.readValue(row.getAt(0).toString(),Player)
$ b $ / code $ / pre
然而,我得到这个错误: / b>
org.postgresql.util.PSQLException:错误:运算符不存在:
json =字符变化提示:没有运算符匹配给定名称
和参数类型(s)。您可能需要添加明确的类型转换。
以下是我的JSON示例:
id:$ {ID},
团队:{
id:123,
name:Shire Soldiers
},
playersContainer:{
series:[
{
id:1,
name:Nick,
teamName:Shire Soldiers,
rating:[
1,
5,
6 ,
9
],
助攻:17,
manOfTheMatches:20,
cleanSheets:1,
data: [
3,
2,
3,
5,
6
],
总目标:19
} ,
{
id:2,
name:Pasty,
teamName:Shire Soldiers,
ratings:[
6,
8,
9,
10
],
助攻:25,
manOfTheMatches:32,
cleanSheets:2,
data:[
3,
5,
7,
9,
10
],
totalGoals:24
}
]
}
我为这个项目使用Groovy,但我想这只是一般的JSON postgres语法,我遇到了问题。
p>你说得对,这是SQL语法的问题。正确的查询:
select * from json_test where content->'playersContainer' - >'series'@> [{ ID 为 1}];
完整示例:
CREATE TABLE json_test(
content jsonb
);
insert into json_test(content)VALUES('{id:1,
team:{
id:123,
name:Shire Soldiers
},
playersContainer:{
series:[
{
id:1,
name:Nick,
teamName:Shire Soldiers,
ratings:[
1,
5,
6,
9
],
助手:17,
manOfTheMatches:20,
cleanSheets:1,
data :[
3,
2,
3,
5,
6
],
总目标:19
},
{
id:2,
name:Pasty,
teamName:Shire Soldiers,
:[
6,
8,
9,
10
],
辅助:25,
manOfTheMatches:32,
cleanSheets:2,
data:[
3,
5,
7,
9,
10
],
总目标:24
}
]
}}');
select * from json_test where content->'playersContainer' - >'series'@> [{ ID 为 1}];
I have some JSON in my postgres DB, it's in a table called site_content
, the table has two rows, id
and content
, in content
is where I store my JSON. I want to be able to find the a player given his id, my players are stored under the key series
as this is the key needed to create my charts from JSON.
Here is the query I am currently using:
Blocking.get {
sql.firstRow("""SELECT * from site_content where content -> 'playersContainer' -> 'series' -> 'id' = ${id} """)
}.map { row ->
log.info("row is: ${row}")
if (row) {
objectMapper.readValue(row.getAt(0).toString(), Player)
}
}
}
However I get back this error:
org.postgresql.util.PSQLException: ERROR: operator does not exist:
json = character varying Hint: No operator matches the given name
and argument type(s). You might need to add explicit type casts.
Here is an example of my JSON:
"id": "${ID}",
"team": {
"id": "123",
"name": "Shire Soldiers"
},
"playersContainer": {
"series": [
{
"id": "1",
"name": "Nick",
"teamName": "Shire Soldiers",
"ratings": [
1,
5,
6,
9
],
"assists": 17,
"manOfTheMatches": 20,
"cleanSheets": 1,
"data": [
3,
2,
3,
5,
6
],
"totalGoals": 19
},
{
"id": "2",
"name": "Pasty",
"teamName": "Shire Soldiers",
"ratings": [
6,
8,
9,
10
],
"assists": 25,
"manOfTheMatches": 32,
"cleanSheets": 2,
"data": [
3,
5,
7,
9,
10
],
"totalGoals": 24
}
]
}
I am using Groovy for this project, but I guess it's just the general JSON postgres syntax I am having problems with.
解决方案 You're right, that's a problem with SQL syntax. Correct you query:
select * from json_test where content->'playersContainer'->'series' @> '[{"id":"1"}]';
Full example:
CREATE TABLE json_test (
content jsonb
);
insert into json_test(content) VALUES ('{"id": "1",
"team": {
"id": "123",
"name": "Shire Soldiers"
},
"playersContainer": {
"series": [
{
"id": "1",
"name": "Nick",
"teamName": "Shire Soldiers",
"ratings": [
1,
5,
6,
9
],
"assists": 17,
"manOfTheMatches": 20,
"cleanSheets": 1,
"data": [
3,
2,
3,
5,
6
],
"totalGoals": 19
},
{
"id": "2",
"name": "Pasty",
"teamName": "Shire Soldiers",
"ratings": [
6,
8,
9,
10
],
"assists": 25,
"manOfTheMatches": 32,
"cleanSheets": 2,
"data": [
3,
5,
7,
9,
10
],
"totalGoals": 24
}
]
}}');
select * from json_test where content->'playersContainer'->'series' @> '[{"id":"1"}]';
About @>
operator. This question might be also useful.
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