[英]Nested JSON parsing using Snowflake SQL
我在解析 Snowflake 中的某個嵌套 JSON 結構時遇到問題。 這里的問題是某些元素使用了特殊字符,例如 @ 和 #。 這些字符使我無法在嘗試訪問某些元素時使用簡單的點表示法,而無需使用結構的扁平部分上的連接和 where 子句進行真正復雜的查詢。 這是 JSON 文件的示例:
{
"ContractTerm": [
{
"@ID": 123123,
"CodeTermTypeID": {
"#text": "some_text 123123"
},
"ContractID": {
"#text": "other_text 123123",
"@href": "/businessObject/123123",
"@ID": 123123
},
"ContractTermID": 123123
},
{
"@ID": 234234,
"CodeTermStatusID": {
"#text": "some_text_again 234234"
},
"CodeTermTypeID": {
"#text": "some_text 234234"
},
"ContractID": {
"#text": "some_other_text 234234",
"@href": "/businessObject/234234",
"@lxID": 234234
},
"ContractTermID": 234234
},
{
"@lD": 345345,
"CodeTermTypeID": {
"#text": "another_text 345345"
},
"ContractID": {
"#text": "another_text 345345",
"@href": "/businessObject/345345",
"@lxID": 345345
},
"ContractTermID": 345345
}
]
}
是否可以獲取以 @ 和 # 開頭的元素,例如在 SQL 代碼中使用一些轉義字符或類似字符?
在帶有特殊字符的屬性周圍使用引號。 例如:
WITH x as (
SELECT parse_json('{
"ContractTerm": [
{
"@ID": 123123,
"CodeTermTypeID": {
"#text": "some_text 123123"
},
"ContractID": {
"#text": "other_text 123123",
"@href": "/businessObject/123123",
"@ID": 123123
},
"ContractTermID": 123123
},
{
"@ID": 234234,
"CodeTermStatusID": {
"#text": "some_text_again 234234"
},
"CodeTermTypeID": {
"#text": "some_text 234234"
},
"ContractID": {
"#text": "some_other_text 234234",
"@href": "/businessObject/234234",
"@lxID": 234234
},
"ContractTermID": 234234
},
{
"@lD": 345345,
"CodeTermTypeID": {
"#text": "another_text 345345"
},
"ContractID": {
"#text": "another_text 345345",
"@href": "/businessObject/345345",
"@lxID": 345345
},
"ContractTermID": 345345
}
]
}') as var)
SELECT y.value:"@ID"
FROM x,
LATERAL FLATTEN(input=>x.var:ContractTerm) y
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