Github user gatorsmile commented on a diff in the pull request:
https://github.com/apache/spark/pull/16626#discussion_r106792896
--- Diff:
sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/catalog/SessionCatalogSuite.scala
---
@@ -450,6 +451,21 @@ abstract class SessionCatalogSuite extends PlanTest {
}
}
+ test("alter table add columns") {
+ withBasicCatalog { sessionCatalog =>
+ sessionCatalog.createTable(newTable("t1", "default"), ignoreIfExists
= false)
+ val oldTab = sessionCatalog.externalCatalog.getTable("default", "t1")
+ sessionCatalog.alterTableSchema(
+ TableIdentifier("t1", Some("default")), oldTab.schema.add("c3",
IntegerType))
+
+ val newTab = sessionCatalog.externalCatalog.getTable("default", "t1")
+ // construct the expected table schema
+ val oldTabSchema = StructType(oldTab.dataSchema.fields ++
--- End diff --
`oldTabSchema ` -> `expectedTabSchema `
---
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