cloud-fan commented on a change in pull request #29324:
URL: https://github.com/apache/spark/pull/29324#discussion_r464257254
##########
File path:
sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/v2/jdbc/JDBCTableCatalogSuite.scala
##########
@@ -106,4 +108,60 @@ class JDBCTableCatalogSuite extends QueryTest with
SharedSparkSession {
Seq(Row("test", "people"), Row("test", "new_table")))
}
}
+
+ test("alter table ... add column") {
+ withTable("h2.test.alt_table") {
+ sql("CREATE TABLE h2.test.alt_table (ID INTEGER) USING _")
+ assert(checkColumnExistence("h2.test.alt_table", Array("ID")))
+ sql("ALTER TABLE h2.test.alt_table ADD COLUMNS (C1 INTEGER, C2 STRING)")
+ assert(checkColumnExistence("h2.test.alt_table", Array("ID", "C1",
"C2")))
+ sql("ALTER TABLE h2.test.alt_table ADD COLUMNS (C3 DOUBLE)")
+ assert(checkColumnExistence("h2.test.alt_table", Array("ID", "C1", "C2",
"C3")))
+ }
+ }
+
+ test("alter table ... rename column") {
+ withTable("h2.test.alt_table") {
+ sql("CREATE TABLE h2.test.alt_table (ID INTEGER) USING _")
+ assert(checkColumnExistence("h2.test.alt_table", Array("ID")))
+ sql("ALTER TABLE h2.test.alt_table RENAME COLUMN ID TO C")
+ assert(checkColumnExistence("h2.test.alt_table", Array("C")))
+ }
+ }
+
+ test("alter table ... drop column") {
+ withTable("h2.test.alt_table") {
+ sql("CREATE TABLE h2.test.alt_table (C1 INTEGER, C2 INTEGER) USING _")
+ assert(checkColumnExistence("h2.test.alt_table", Array("C1", "C2")))
+ sql("ALTER TABLE h2.test.alt_table DROP COLUMN C1")
+ assert(checkColumnExistence("h2.test.alt_table", Array("C2")))
+ }
+ }
+
+ test("alter table ... update column type") {
Review comment:
let's add a new test to test "update column nullability"
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