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[GitHub] [carbondata] ShreelekhyaG commented on a change in pull request #4113: [CARBONDATA-4161] Describe complex columns

Posted by GitBox on Apr 07, 2021; 5:07am
URL: http://apache-carbondata-dev-mailing-list-archive.168.s1.nabble.com/GitHub-carbondata-ShreelekhyaG-opened-a-new-pull-request-4113-WIP-Describe-complex-columns-tp107265p107418.html


ShreelekhyaG commented on a change in pull request #4113:
URL: https://github.com/apache/carbondata/pull/4113#discussion_r608342525



##########
File path: integration/spark/src/test/scala/org/apache/carbondata/spark/testsuite/describeTable/TestDescribeTable.scala
##########
@@ -72,11 +84,131 @@ class TestDescribeTable extends QueryTest with BeforeAndAfterAll {
     assert(descPar.exists(_.toString().contains("Partition Parameters:")))
   }
 
+  test("test describe column field name") {
+    // describe primitive column
+    var desc = sql("describe column deviceInformationId on complexcarbontable").collect()
+    assert(desc(0).get(0).asInstanceOf[String].trim.equals("deviceInformationId"))
+    assert(desc(0).get(1).asInstanceOf[String].trim.equals("integer"))
+
+    // describe simple map
+    /*
+    +----------------------------+---------+-------+
+    |col_name                    |data_type|comment|
+    +----------------------------+---------+-------+
+    |channelsId                  |map      |null   |
+    |## Children of channelsId:  |         |       |
+    |key                         |string   |null   |
+    |value                       |string   |null   |
+    +----------------------------+---------+-------+
+    */
+    desc = sql("describe column channelsId on complexcarbontable").collect()

Review comment:
       ok done




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