Function align_json_array 

pub fn align_json_array(
    json_array: &ArrayRef,
    schema_type: &DataType,
) -> Result<ArrayRef>

Align a json array json_array to the json type schema_type. The schema_type is often the “largest” json type after some insertions in the table schema, while the json array previously written in the SST could be lagged behind it. So it’s important to “amend” the json array’s missing fields with null arrays, to align the array’s data type with the provided one.

Panics

• The json array is not an Arrow [StructArray], or the provided data type schema_type is not of Struct type. Both of which shouldn’t happen unless we switch our implementation of how json array is physically stored.