Snowflake Error parsing JSON: unfinished string, pos <number> - sql

Question

I am trying to query a varchar column called "JsonCode" from the "Weather" table in snowflake. The "JsonCode" column looks like this:
{
"Date": "2019-11-07T12:28:18",
"CurrentTemp": "47°F",
"WeatherIconStatus": "clear-day",
"LowTemp": "21°F",
"HighTemp": "50°F",
"WindSpeed": "6 mph",
"TempCategory": "Hot",
"ForecastData": [
{
"Date": "2019-11-08T00:00:00",
"WeatherIconStatus": "clear-day",
"LowTemp": "26°F",
"HighTemp": "51°F",
"WindSpeed": "3 mph"
},
{
"Date": "2019-11-09T00:00:00",
"WeatherIconStatus": "clear-day",
"LowTemp": "28°F",
"HighTemp": "56°F",
"WindSpeed": "7 mph"
}
],
"PrecipitationReportData": {
"ReportDateTimeAsDate": "2019-11-07T04:45:14",
"PrecipitationConditions": "",
"ForecastText": "Clear",
"NewPrecipitationReadings": {
"Overnight": {
"PrecipitationReading": "0in"
},
"TwentyFourHours": {
"PrecipitationReading": "0in"
},
"FortyEightHours": {
"PrecipitationReading": "0in"
},
"SevenDays": {
"PrecipitationReading": "0in"
}
},
"AreaReadings": {
"City": {
"PrecipitationReading": "0in"
},
"Town": {
"PrecipitationReading": "0in"
},
"Highway": {
"PrecipitationReading": null
}
},
"SeasonPrecipitation": {
"PrecipitationReading": "44in"
}
},
"Links": [
{
"Href": "https://weather.com",
"Rel": "self",
"Method": "GET"
}
]
}
I am specifically trying to grab the "WindSpeed" data from 2019-11-07. I created a query that looks like this.
SELECT value:WindSpeed::varchar FROM "DATABASE"."DBO"."WEATHER"
, lateral flatten(input => PARSE_JSON(JsonCode):windspeed);
The response I received is
Error parsing JSON: unfinished string, pos <number>
I have been unable to find any documentation around this error. Any help is appreciated.
Note: I cut out some of the Json since there is multiple days of forecasted data.

Answer 1

This should work without the need of a lateral flatten:
select parse_json(j):WindSpeed
from data
With the posted sample JSON:
with data as (
select $${
"Date": "2019-11-07T12:28:18",
"CurrentTemp": "47°F",
"WeatherIconStatus": "clear-day",
"LowTemp": "21°F",
"HighTemp": "50°F",
"WindSpeed": "6 mph",
"TempCategory": "Hot",
"ForecastData": [
{
"Date": "2019-11-08T00:00:00",
"WeatherIconStatus": "clear-day",
"LowTemp": "26°F",
"HighTemp": "51°F",
"WindSpeed": "3 mph"
},
{
"Date": "2019-11-09T00:00:00",
"WeatherIconStatus": "clear-day",
"LowTemp": "28°F",
"HighTemp": "56°F",
"WindSpeed": "7 mph"
}
],
"PrecipitationReportData": {
"ReportDateTimeAsDate": "2019-11-07T04:45:14",
"PrecipitationConditions": "",
"ForecastText": "Clear",
"NewPrecipitationReadings": {
"Overnight": {
"PrecipitationReading": "0in"
},
"TwentyFourHours": {
"PrecipitationReading": "0in"
},
"FortyEightHours": {
"PrecipitationReading": "0in"
},
"SevenDays": {
"PrecipitationReading": "0in"
}
},
"AreaReadings": {
"City": {
"PrecipitationReading": "0in"
},
"Town": {
"PrecipitationReading": "0in"
},
"Highway": {
"PrecipitationReading": null
}
},
"SeasonPrecipitation": {
"PrecipitationReading": "44in"
}
},
"Links": [
{
"Href": "https://weather.com",
"Rel": "self",
"Method": "GET"
}
]
}$$ j
)
select parse_json(j):WindSpeed
from data