Table of SQLite3 contains 2 column and select command will give below json output :
SELECT COLUMN2 FROM TABLE WHERE COLUMN1='1';
OUTPUT:
{ "categories": null, "settings": { "A": "10", "B": { "C":
["Test1","Test2","Test3"]}, "D": "1.0" } }
Now i wanted to set Value of Key "C" to ["Apple","orange"] .
SQLite3 supports JSON where we can set the value of Key using json_set. But i am not able to do that and need some help on it
Thanks
Related
I've a requirement to fetch value from json using jayway jsonpath.
Json structure looks like below
[
{
"type": "a",
"values": [
{
"name": "a",
"value": [1,2,3]
},
{
"name": "b",
"value": [3,4,5]
},
{
"name": "c",
"value": [6,7,8]
}
]
}
]
my requirement is in the values array if the name value is a and value array contains value 1, then I need to fetch value array where name is b.
I have written jsonPath expression like below
$..values[?(#.name == 'a')]
where it is returning only
{
"name": "a",
"value": [1,2,3]
}
could someone help me in writing jsonpath expression please , Thanks in advance.
expected output
[3,4,5]
tried with
$..[?(#.values[?(#.name== 'a' && #.value CONTAINS 1)])]
then it is matching every object present in root array.
With Jayway JSONPATH you might get lucky with below jsonpath
$..[?(#.values[?(#.name=='a')].value[*] contains 1 )].values[?(#.name=='b')].value[*]
Lets say I have an I/P json file as below. And I want to extract the O/P in a CSV format with the below fields. Specifically, I want to get the value of the key "Gamma" in the o/p if the key "Gamma" exists in "tags" map. If the key doesn't exists, it should just print a NULL value. The expected o/p is below.
generated_time,platform,id,,
2021-09-09:12:03:12,earth,2eeee67748,Ray,2021-08-25 09:41:06
2021-09-09:12:03:12,sun,xxxxx12334,NULL,2021-08-25 10:11:31
[
{
"generated_time": "generated_time",
"platform": "platform",
"id": "id"
},
{
"generated_time": "2021-09-09:12:03:12",
"platform": "earth",
"id": "2eeee67748",
"tags": {
"app": "map",
"Gamma": "Ray",
"null": [
"allow-all-humans"
]
},
"created": "2021-08-25 09:41:06"
},
{
"generated_time": "2021-09-09:12:03:12",
"platform": "sun",
"id": "xxxxx12334",
"tags": {
"component": "machine",
"environment": "hot",
"null": [
"aallow-all-humans"
]
},
"created": "2021-08-25 10:11:31"
}
]
jq has a builtin #csv which renders an array
as CSV with double quotes for strings, and quotes escaped by repetition.
If the additional quoting (as compared to your expected output) isn't an issue, the following
jq --raw-output '
# produce an array for each element in the input array
.[] | [
# containing the first three columns unchanged
.generated_time, .platform, .id,
# if the input element has a field named "tags"
if has("tags")
# then add two more columns and replace an inexistant Gamma with "NULL"
then (.tags.Gamma // "NULL", .created)
# otherwise add two empty columns instead
else (null, null) end
# and convert the array into CSV format
] | #csv
' input.json
will produce
"generated_time","platform","id",,
"2021-09-09:12:03:12","earth","2eeee67748","Ray","2021-08-25 09:41:06"
"2021-09-09:12:03:12","sun","xxxxx12334","NULL","2021-08-25 10:11:31"
In my DB I have a column storing JSON. The JSON looks like this:
{
"views": [
{
"id": "1",
"sections": [
{
"id": "1",
"isToggleActive": false,
"components": [
{
"id": "1",
"values": [
"02/24/2021"
]
},
{
"id": "2",
"values": []
},
{
"id": "3",
"values": [
"5393",
"02/26/2021 - Weekly"
]
},
{
"id": "5",
"values": [
""
]
}
]
}
]
}
]
}
I want to create a migration script that will extract a value from this JSON and store them in its own column.
In the JSON above, in that components array, I want to extract the second value from the component with an ID of "3" (among other things, but this is a good example). So, I want to extract the value "02/26/2021 - Weekly" to store in its own column.
I was looking at the JSON_VALUE docs, but I only see examples for specifing indexes for the json properties. I can't figure out what kind of json path I'd need. Is this even possible to do with JSON_VALUE?
EDIT: To clarify, the views and sections components can have static array indexes, so I can use views[0].sections[0] for them. Currently, this is all I have with my SQL query:
SELECT
*
FROM OPENJSON(#jsonInfo, '$.views[0].sections[0]')
You need to use OPENJSON to break out the inner array, then filter it with a WHERE and finally select the correct value with JSON_VALUE
SELECT
JSON_VALUE(components.value, '$.values[1]')
FROM OPENJSON (#jsonInfo, '$.views[0].sections[0].components') components
WHERE JSON_VALUE(components.value, '$.id') = '3'
I have json as a string "Str"
"{
"A": {
"id": 4
},
"B": {//Something},
"C": {
"A": {
"id": 2
}
},
"E": {
"A": null
},
"F": {//Something}
}"
I wanted all non null values of "A" which can be repeated anywhere in json. I wanted output like all contents of "A"
{"id": 4}
{"id": 2}
Can you please help me with Linux command to get this ?
Instead of line oriented ones use a tool which is capable of parsing JSON values syntax wise. An example using jq:
$ json_value='{"A":{"id":4},"B":{"foo":0},"C":{"A":{"id":2}},"E":{"A":null},"F":{"foo":0}}'
$
$ jq -c '..|objects|.A//empty' <<< "$json_value"
{"id":4}
{"id":2}
.. # list nodes recursively
| objects # select objects
| .A // empty # print A's value if present.
I am currently using the Cassandra-Ruby driver to insert data from a JSON file into an existing table in my database.
the JSON file looks like this:
[
{
"id": "123",
"destination": "234",
"type": "equipment",
"support": "type 1",
"test": "test1"
},
{
"id": "234",
"destination": "123",
"type": "equipment",
"support": "type 1",
"test": "test1"
}
]
I am reading in the file like this:
file = File.read('itemType.json')
data_hash = JSON.parse(file) #return an array of hashes
Iterate through the array and get each hash
and insert each hash onto the table
data_hash.each do |has|
#check the type of each object
#puts has.class #return hash
insert_statement = session.prepare('INSERT INTO keyspace.table JSON ?')
session.execute(insert_statement, [has]) #error occurs here
end
After running this code, I get this error message
in `assert_instance_of': options must be a Hash
I checked that each object being inserted in the table is a hash, so I'm not sure why I'm getting this issue.
You are saying that you are inserting a JSON but you are not, you are trying to insert an object. See this example from the documentation:
INSERT INTO cycling.cyclist_category JSON '{
"category" : "Sprint",
"points" : 700,
"id" : "829aa84a-4bba-411f-a4fb-38167a987cda"
}';
You have to give it a json format if you do it like that.
using .to_json add \ escape character. This gave me error
INSERT INTO organization_metadata JSON '{\"id\":9150,\"destroyed\":false,\"name\":\"ABC\",\"timestamp\":1510541801000000000}';
and the following worked.
INSERT INTO organization_metadata JSON '{"id":9150,"destroyed":false,"name":"ABC","timestamp":1510541801000000000}';