Github user gatorsmile commented on a diff in the pull request:
https://github.com/apache/spark/pull/16626#discussion_r106786357
--- Diff:
sql/core/src/test/scala/org/apache/spark/sql/execution/command/DDLSuite.scala
---
@@ -2178,4 +2197,107 @@ abstract class DDLSuite extends QueryTest with
SQLTestUtils {
}
}
}
+
+ Seq("parquet", "json", "csv").foreach { provider =>
+ test(s"alter datasource table add columns - $provider") {
+ withTable("t1") {
+ sql(s"CREATE TABLE t1 (c1 int) USING $provider")
+ sql("INSERT INTO t1 VALUES (1)")
+ sql("ALTER TABLE t1 ADD COLUMNS (c2 int)")
+ checkAnswer(
+ sql("SELECT * FROM t1"),
+ Seq(Row(1, null))
+ )
+ checkAnswer(
+ sql("SELECT * FROM t1 WHERE c2 is null"),
+ Seq(Row(1, null))
+ )
+
+ sql("INSERT INTO t1 VALUES (3, 2)")
+ checkAnswer(
+ sql("SELECT * FROM t1 WHERE c2 = 2"),
+ Seq(Row(3, 2))
+ )
+ }
+ }
+ }
+
+ Seq("parquet", "json", "csv").foreach { provider =>
+ test(s"alter datasource table add columns - partitioned - $provider") {
+ withTable("t1") {
+ sql(s"CREATE TABLE t1 (c1 int, c2 int) USING $provider PARTITIONED
BY (c2)")
+ sql("INSERT INTO t1 PARTITION(c2 = 2) VALUES (1)")
+ sql("ALTER TABLE t1 ADD COLUMNS (c3 int)")
+ checkAnswer(
+ sql("SELECT * FROM t1"),
--- End diff --
spark.table("t1")
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