scala - how to put filter on structure of attributes of xml files with spark -


i have large number of xml files large number of attributes. want apply filter on list of these files can find files contains attribute named "a" structtype. how can achieve ?

|-- a: array (nullable = true) |    |-- element: struct (containsnull = true) |    |    |-- b: string (nullable = true) |    |    |-- c: string (nullable = true)

data - 

a  [[1,x]]


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