maropu commented on a change in pull request #24202: [SPARK-27268][SQL] Add
map_keys and map_values support in nested schema pruning.
URL: https://github.com/apache/spark/pull/24202#discussion_r268683439
##########
File path:
sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/SchemaPruningSuite.scala
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@@ -253,6 +257,20 @@ abstract class SchemaPruningSuite
checkAnswer(query, Row(1) :: Nil)
}
+ testSchemaPruning("select nested field from a complex map key using
map_keys") {
+ val query = sql("select map_keys(relations).middle[0], p from contacts")
+ checkScan(query,
+ "struct<relations:map<struct<middle:string>,string>>")
+ checkAnswer(query, Row("Y.", 1) :: Row("X.", 1) :: Row(null, 2) ::
Row(null, 2) :: Nil)
+ }
+
+ testSchemaPruning("select nested field from a complex map value using
map_values") {
+ val query = sql("select map_values(relatives).middle[0], p from contacts")
+ checkScan(query,
+ "struct<relatives:map<string,struct<middle:string>>>")
Review comment:
ditto
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