This section contains reference documentation for the JSONPATHDOUBLE function.
Extracts the Double value from jsonField
based on 'jsonPath'
, use optional defaultValue
for null or parsing error. This function can only be used in an ingestion transformation function.
JSONPATHDOUBLE(jsonField, 'jsonPath', [defaultValue])
jsonField
An Identifier/Expression contains JSON documents.
'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.
The usage examples are based on extracting fields from the following JSON document:
JSONPATHDOUBLE(data, '$.age')
24.0
This function can be used in the table config to extract the age
property into the age
column, as described below:
Follows to read values from JSON documents.