jsonField
based on 'jsonPath'
, the result type is inferred based on JSON value. Returns empty array for null or parsing error. This function can only be used in an ingestion transformation function.JSONPATHARRAYDEFAULTEMPTY(jsonField, 'jsonPath')
jsonField
'jsonPath'
'jsonPath'
` is a literal. Pinot uses single quotes to distinguish them from identifiers.
You can use the Jayway JsonPath Evaluator Tool to test JSON expressions before you import any data.JSONPATHARRAYDEFAULTEMPTY(myJsonRecord, '$.subjects[*].name')
["maths", "english"]
JSONPATHARRAYDEFAULTEMPTY(myJsonRecord, '$.subjects[*].score')
[90, 70]
JSONPATHARRAYDEFAULTEMPTY(myJsonRecord, '$.subjects[*].homework_grades[1]')
[85, 65]
JSONPATHARRAYDEFAULTEMPTY(myJsonRecord, '$.subjects[*].homework_grades[7]')
[]
name
, score
, and second value of homework_grades
into their respective columns , as described below: