Is there any plans of supporting JSON arrays more fully? Take for example:
val myJson =
sqlContext.jsonRDD(List("""{"foo":[{"bar":1},{"baz":2}]}"""))
myJson.registerTempTable("JsonTest")
I would like a way to pull out parts of the array data based on a key
sql("""SELECT foo["bar"] FROM JsonTest""") //projects only the object
with bar, the rest would be null
I could even work around this if there was some way to access the key name
from the SchemaRDD:
myJson.filter(x=>x(0).asInstanceOf[Seq[Row]].exists(y=>y.key == "bar"))
.map(x=>x(0).asInstanceOf[Seq[Row]].filter(y=>y.key == "bar"))
//This does the same as above, except also filtering out those without a
bar key
This is the closest suggestion I could find thus far,
<https://cwiki.apache.org/confluence/display/Hive/LanguageManual+LateralView>
which still does not solve the problem of pulling out the keys.
I tried with a UDF also, but could not currently make that work either.
If there isn't anything in the works, then would it be appropriate to create
a ticket for this?
Thanks,
Justin
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